ITECH IT8512H-PLUS 800V 5A Programmable DC Electronic Load User Manual

DC Programmable Electronic

Loads

IT8500plus Series User Manual

Model:IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A

+/IT8512B+/IT8512C+/IT8512H+/IT8513A+/IT8513B

+/IT8513C+/IT8514C+/IT8514B+/IT8516C+

Version: 2.1

Notices

No part of this manual may be

reproduced in any form or by any means

(including electronic storage and

retrieval or translation into a foreign

language) without prior permission and

written consent from Itech Electronic,

Co., Ltd. as governed by international

copyright laws.

Manual Part Number

IT8500+-402008

Revision

Second Edition: Mar. 15,

2018

Itech Electronic, Co., Ltd.

Trademarks

Pentium is U.S. registered trademarks

of Intel Corporation.

Microsoft, Visual Studio, Windows and

MS Windows are registered trademarks

of Microsoft Corporation in the United

States and/or other countries and

regions.

Warranty

The materials contained in this

document are provided “as is”, and

is subject to change, without prior

notice, in future editions. Further, to

the maximum extent permitted by

applicable laws, ITECH disclaims

all warrants, either express or

implied, with regard to this manual

and any information contained

herein, including but not limited to

the implied warranties of

merchantability and fitness for a

particular purpose. ITECH shall

not be held liable for errors or for

incidental or indirect damages in

connection with the furnishing, use

or application of this document or of

any information contained herein.

Should ITECH and the user enter

into a separate written agreement

with warranty terms covering the

materials in this document that

conflict with these terms, the

warranty terms in the separate

agreement shall prevail.

Technology Licenses

The hardware and/or software

described herein are furnished under a

license and may be used or copied only

in accordance with the terms of such

license.

Restricted Rights Legend

Restricted permissions of the U.S.

government. Permissions for software

and technical data which are authorized

to the U.S. Government only include

those for custom provision to end users.

ITECH follows FAR 12.211 (technical

data), 12.212 (computer software).

DFARS 252.227-7015 (technical

data--commercial products) for national

defense and DFARS 227.7202-3

(permissions for commercial computer

software or computer software

documents) while providing the

customized business licenses of

software and technical data.

Safety Notices

A CAUTION sign denotes a

hazard. It calls attention to an

operating procedure or practice

that, if not correctly performed

or adhered to, could result in

damage to the product or loss of

important data. Do not proceed

beyond a CAUTION sign until

the indicated conditions are fully

understood and met.

A WARNING sign denotes a

hazard. It calls attention to an

operating procedure or practice

that, if not correctly performed

or adhered to, could result in

personal injury or death. Do not

proceed beyond a WARNING

sign until the indicated

conditions are fully understood

and met.

NOTE

A NOTE sign denotes

important hint. It calls attention

to tips or supplementary

information that is essential for

users to refer to.

IT8500+ User Manual

Quality Certification and Assurance

We certify that series IT8500+ electronic load meets all the published

specifications at time of shipment from the factory.

Warranty

ITECH warrants that the product will be free from defects in material and

workmanship under normal use for a period of one (1) year from the date of

delivery (except those described in the Limitation of Warranty below).

For warranty service or repair, the product must be returned to a service center

designated by ITECH.

 The product returned to ITECH for warranty service must be shipped

PREPAID. And ITECH will pay for return of the product to customer.

 If the product is returned to ITECH for warranty service from overseas, all

the freights, duties and other taxes shall be on the account of customer.

Limitation of Warranty

This Warranty will be rendered invalid in case of the following:

 Damage caused by circuit installed by customer or using customer own

products or accessories;

 Modified or repaired by customer without authorization;

 Damage caused by circuit installed by customer or not operating our

products under designated environment;

 The product model or serial number is altered, deleted, removed or made

illegible by customer;

 Damaged as a result of accidents, including but not limited to lightning,

moisture, fire, improper use or negligence.

Safety Symbols

Direct current

ON (power on)

Alternating current

OFF (power off)

Both direct and alternating

current

Power-on state

Protective conductor terminal

Power-off state

Earth (ground) terminal

Reference

terminal

Caution, risk of electric shock

Positive terminal

Warning, risk of danger (refer

to this manual for specific

Warning or Caution

information)

Negative terminal

Frame or chassis terminal

-

IT8500+ User Manual

Safety Precautions

The following safety precautions must be observed during all phases of

operation of this instrument. Failure to comply with these precautions or specific

warnings elsewhere in this manual will constitute a default under safety

standards of design, manufacture and intended use of the instrument. ITECH

assumes no liability for the customer’s failure to comply with these precautions.

 Series IT8500+ electronic load supports 110V/220VAC input and need to

switch the input voltage before operation.

 Do not use the instrument if it is damaged. Before operation, check the

casing to see whether it cracks. Do not operate the instrument in the

presence of inflammable gasses, vapors or dusts.

 The electronic load is provided with a power line during delivery and should

be connected to a socket with a protective earth terminal. Before operation,

be sure that the instrument is well grounded.

 Make sure to use the power cord supplied by ITECH.

 Check all marks on the instrument before connecting the instrument to

power supply.

 Use electric wires of appropriate load. All loading wires should be capable

of bearing maximum short-circuit current of electronic load without

overheating. If there are multiple electronic loads, each pair of the power

cord must be capable of bearing the full-loaded rated short-circuit output

current

 Ensure the voltage fluctuation of mains supply is less than 10% of the

working voltage range in order to reduce risks of fire and electric shock.

 Do not install alternative parts on the instrument or perform any

unauthorized modification.

 Do not use the instrument if the detachable cover is removed or loosen.

 To prevent the possibility of accidental injuries, be sure to use the power

adapter supplied by the manufacturer only.

 We do not accept responsibility for any direct or indirect financial damage

or loss of profit that might occur when using the instrument.

 This instrument is used for industrial purposes, do not apply this product to

IT power supply system.

 Never use the instrument with a life-support system or any other equipment

subject to safety requirements.

 Failure to use the instrument as directed by the manufacturer may render

its protective features void.

 Always clean the casing with a dry cloth. Do not clean the internals.

 Make sure the vent hole is always unblocked.

IT8500+ User Manual

Environmental Conditions

The instrument is designed for indoor use and an area with low condensation.

The table below shows the general environmental requirements for the

instrument. The speed of fan will change intelligently by the temperature of

radiator. When the temperature is up to 40°C, the fan will be on and adjust

intelligently when temperature changes.

Environmental Conditions

Requirements

Operating temperature

0°C to 40°C

Operating humidity

20%-80% (non-condensation)

Storage temperature

-20°C to 70 °C

Altitude

Operating up to 2,000 meters

Pollution degree

Pollution degree 2

Installation category

II

Note

To make accurate measurements, allow the instrument to warm up for 30 min before

operation.

Regulatory Markings

The CE mark indicates that the product

complies with all the relevant European

legal directives. The specific year (if any)

affixed refers to the year when the design

was approved.

The instrument complies with the WEEE

Directive (2002/96/EC) marking

requirement. This affixed product label

indicates that you must not discard the

electrical/electronic product in domestic

household waste.

This symbol indicates the time period

during which no hazardous or toxic

substances are expected to leak or

deteriorate during normal use. The

expected service life of the product is 10

years. The product can be used safely

during the 10-year Environment Friendly

Use Period (EFUP). Upon expiration of

the EFUP, the product must be

immediately recycled.

Waste Electrical and Electronic Equipment (WEEE)

Directive

2002/96/EC Waste Electrical and Electronic Equipment

(WEEE) Directive

This product complies with the WEEE Directive (2002/96/EC)

marking requirement. This affix product label indicates that you

must not discard the electrical/electronic product in domestic

household waste.

Product Category

IT8500+ User Manual

With reference to the equipment classifications described in the

Annex I of the WEEE Directive, this instrument is classified as a

“Monitoring and Control Instrument”.

To return this unwanted instrument, contact your nearest

ITECH office.

IT8500+ User Manual

Compliance Information

Complies with the essential requirements of the following applicable European

Directives, and carries the CE marking accordingly:

 Electromagnetic Compatibility (EMC) Directive 2014/30/EU

 Low-Voltage Directive (Safety) 2014/35/EU

Conforms with the following product standards:

EMC Standard

IEC 61326-1:2012/ EN 61326-1:2013 ¹²³

Reference Standards

CISPR 11:2009+A1:2010/ EN 55011:2009+A1:2010 (Group 1, Class A)

IEC 61000-4-2:2008/ EN 61000-4-2:2009

IEC 61000-4-3:2006+A1:2007+A2:2010/ EN 61000-4-3:2006+A1:2008+A2:2010

IEC 61000-4-4:2004+A1:2010/ EN 61000-4-4:2004+A1:2010

IEC 61000-4-5:2005/ EN 61000-4-5:2006

IEC 61000-4-6:2008/ EN 61000-4-6:2009

IEC 61000-4-11:2004/ EN 61000-4-11:2004

1. The product is intended for use in non-residential/non-domestic environments. Use of the

product in residential/domestic environments may cause electromagnetic interference.

2. Connection of the instrument to a test object may produce radiations beyond the specified

limit.

3. Use high-performance shielded interface cable to ensure conformity with the EMC standards

listed above.

Safety Standard

IEC 61010-1:2010/ EN 61010-1:2010

    IT8500+ User Manual 
  Copyright ©  Itech Electronic Co., Ltd.  vi 
Content 
Quality Certification and Assurance ............................................................................................................................ i 
Warranty ..................................................................................................................................................................... i 
Limitation of Warranty ................................................................................................................................................ i 
Safety Symbols ............................................................................................................................................................ i 
Safety Precautions ...................................................................................................................................................... ii 
Environmental Conditions ......................................................................................................................................... iii 
Regulatory Markings ................................................................................................................................................. iii 
Waste Electrical and Electronic Equipment (WEEE) Directive ................................................................................... iii 
Compliance Information ............................................................................................................................................ v 
Chapter1  Inspection and Installation ............................................................................................................. 1 
1 Verifying the Shipment ......................................................................................................................................... 1 
2 Instrument Size Introduction ............................................................................................................................... 3 
3 Adjustment of Load Handle ................................................................................................................................. 6 
4 Disassembly of Load Handle ................................................................................................................................ 7 
5 Rack Mounting ..................................................................................................................................................... 8 
6 Connect the Power Cord ...................................................................................................................................... 8 
7 Connect the Device Under Test (DUT) .................................................................................................................. 9 
Chapter2  Quick Start ................................................................................................................................... 12 
1 Brief Introduction ............................................................................................................................................... 12 
2 Product Feature .................................................................................................................................................. 12 
3 Front Panel Introduction .................................................................................................................................... 13 
4 Front Panel Keys ................................................................................................................................................. 14 
5 Combination Keys............................................................................................................................................... 15 
6 VFD Annunciators ............................................................................................................................................... 15 
7 Rear Panel Introduction ..................................................................................................................................... 16 
8 Power-on Selftest ............................................................................................................................................... 17 
Chapter3  Functions and Characteristics ....................................................................................................... 20 
1 Local Mode/Remote Mode ................................................................................................................................ 20 
2 Operation Mode ................................................................................................................................................. 20 
2.1 Constant Current Mode (CC)................................................................................................................. 20 
2.2 Constant Voltage Mode (CV) ................................................................................................................. 21 
2.3 Constant Resistance Mode (CR) .......................................................................................................... 22 
2.4 Constant Power Mode (CW) .................................................................................................................. 23 
3 Input On/Off Control .......................................................................................................................................... 23 
4 Key Lock Function ............................................................................................................................................... 24 
5 Short-circuit Analog Function............................................................................................................................. 24 
6 System Menu (System) ....................................................................................................................................... 24 
7 Config Menu (Config) ......................................................................................................................................... 26 
8 Trigger Function ................................................................................................................................................. 27 
9 LIST Operation .................................................................................................................................................... 28 
10 Test Function .................................................................................................................................................... 30 
10.1 Transient Test Function ........................................................................................................................ 30 
10.2 OCP Test Function ................................................................................................................................ 33 
10.3 OPP Test Function ................................................................................................................................ 34 
10.4 Battery Discharge Test ......................................................................................................................... 35 
10.5 CR-LED Test Function ......................................................................................................................... 37 
10.6 Measurement of Voltage Rise Time ................................................................................................... 39 
11 Saving and Recalling Settings ........................................................................................................................... 39 
12 VON Function ................................................................................................................................................... 40 
13 Protection Function .......................................................................................................................................... 41 
14 Current Monitoring (I Monitor) ........................................................................................................................ 42 
15 Ripple Function ................................................................................................................................................ 42 
Chapter4  Automatic Test Function ............................................................................................................... 44 
1 Introduction ....................................................................................................................................................... 44 
2 Automatic Test Mode Switching ......................................................................................................................... 44 

    IT8500+ User Manual 
  Copyright ©  Itech Electronic Co., Ltd.  vii 
4.2.1 Test Mode for IT8500+ ........................................................................................................................... 45 
4.2.2 Test Mode for IT8500 .............................................................................................................................. 48 
Chapter5  Specifications ............................................................................................................................... 51 
Specifications ........................................................................................................................................................... 51 
Supplementary Characteristics ................................................................................................................................ 65 
Chapter6  Communication Interfaces ........................................................................................................... 66 
6.1 Communication Modules Introduction .............................................................................................................. 66 
6.2 Communication with PC ..................................................................................................................................... 68 
Appendix .............................................................................................................................................................. 70 
Specifications of Red and Black Test Lines ............................................................................................................... 70 
 
 
 

Inspection and Installation

Chapter1 Inspection and Installation

1.1 Verifying the Shipment

Unpack the box and check the contents before operating the instrument. If

wrong items have been delivered, if items are missing, or if there is a defect

with the appearance of the items, contact the dealer from which you purchased

the instrument immediately. The package contents include:

Checklist of Package Contents

Item

Qty.

Model

Remarks

Electronic Loads

x1

IT8500+ series

The IT8500+ series include:

IT8511+/IT8511A+/IT8511B+/IT8

512+/IT8512A+/IT8512B+/IT851

2C+/IT8512H+/IT8513A+/IT851

3B+/IT8513C+/IT8514C+/IT851

4B+/IT8516C+

Power cord

x1

IT-E171/IT-E17

2/IT-E173/IT-E1

74

User may select an appropriate

power cord that matches the

specifications of power socket

used in the area. See the

Section Connecting the Power

Cord for details.

CD

x1

-

It contains IT8500+ electronic

load User’s Manual,

Programming Guide and other

user documentations.

Ex-factory Test

Report

x1

-

It is the test report of the

instrument before delivery.

NOTE

Upon verification of the shipment, keep the package and relevant contents thereof in a

safe place. When returning the instrument for warranty service or repair, the specified

packing requirements shall be met.

The IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512H+/

IT8512C+/IT8512H+/IT8512C+/IT8513A+/IT8513C+ models have separately

sold optional accessories. Please refer to Chapter5 Communication

Interfaces for details of each accessory.

Device Name

Model

Accessories Description

Rack mount kit

IT-E151

Select this accessory when the user needs

to install the instrument on a special

bracket.

RS232

Communication

Module

IT-E121

Select this accessory when users need to

use the standard RS232 extension cable to

connect the DB9 interface connector of the

DC load and the RS-232 interface

connector of computer for the

communication.

RS232

Communication

Module

IT-E121A

The DB9 interface connector of the RS232

changes from female to male, so that can

be directly connected to the standard LAN

interface.

Inspection and Installation

Device Name

Model

Accessories Description

USB

Communication

Module

IT-E122

Select this accessory when you need to

use IT-E122 and an a standard USB

extension cable (type B female connector

at one end and type A at one end) to

connect the DB9 interface connector of the

DC load and the USB interface connector

of computer for the communication.

RS485

Communication

Module

IT-E123

Select this accessory when you need to

use the communication module IT-E123

and a standard RS485-RS232 conversion

cable to connect the DB9 interface

connector of the DC load and the RS-232

interface connector of computer for the

communication.

Inspection and Installation

1.2 Instrument Size Introduction

The instrument should be installed at well-ventilated and rational-sized space.

Please select appropriate space for installation based on the electronic load

size.

IT8500+ series electronic load different models are not the same size, the detail

size of the electronic load is shown as below.

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512B+/IT8512C+/IT8512H+ Model

Detailed Dimension Drawing

Inspection and Installation

IT8513A+/IT8513C+ Model

Detailed Dimension Drawing

IT8513B+/IT8514B+/ IT8514C+ Model

Detailed Dimension Drawing

Inspection and Installation

IT8516C+ Model

Inspection and Installation

1.3 Adjustment of Load Handle

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C+/IT8512H

/IT8513A+/IT8513C+ series loads are equipped with a handle for user to easily

carry and place it.

The load handle may be adjusted based on three methods (as shown in icons

below). Be sure that appropriate force is applied to adjust the load handle to

appropriate position.

Detailed Dimension Drawing

Inspection and Installation

1.4 Disassembly of Load Handle

Please disassemble the load handle before installing equipment on the support.

Disassembly steps:

1. Adjust the handle to the position as shown in the figure below.

NOTE

To easily disassemble handle, align the locking mouth and locking device, which is between

the handle and the instrument.

2. Align the locking mouth, and pull out the handle towards two sides.

NOTE

Do not use too much force and mind your hands during disassembly of load handle.

Inspection and Installation

1.5 Rack Mounting

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C+/IT8512H

+/IT8513A+/IT8513C+ loads can be installed on standard 19-inch rack. ITECH

provides user with IT-E151/IT-E151A rack, as an optional mount kit. The

detailed operation please refer to the User Manual of your mount kit.

IT8513B+/IT8514B+/IT8514C+/IT8516C+ need not mount on rack, they can be

installed on cabinet directly by screw.

1.6 Connect the Power Cord

Before connecting the power cord

To prevent electric shock and damage to the instrument, observe the following

precautions.

 Before connecting the power cord, please confirm the 110V / 220V transfer

switch to ensure that the switch of the load matches the supply voltage.

Otherwise, the instrument may be damaged.

 Connect the power cord after checking that the power switch of the

instrument is turned OFF. Only use the power cord supplied as a standard

accessory.

 To prevent electric shock, be sure to take protective earthing. Please

connect the power cable to the socket with the protective earth terminal.

 Do not use the extension cord without protective grounding function,

otherwise the protection function will be invalid.

 Please use the AC power socket matching the power cord shipped with the

box and take the protective earthing measures. If you can not use a

suitable AC power cord, do not use the instrument.

Power cord type

Select from the following Schedule of Power Cord Specifications an appropriate

power cord that matches the voltage for the area in which you use the

instrument. If the power cord included in the instrument you purchased does

not match the voltage, contact the dealer or manufacturer for change.

China

IT-E171

United States &

Canada

IT-E172

Europe

IT-E173

England

IT-E174

AC input level

A transfer switch is selectable on the rear panel:

 Option Opt.1: 220V ±10% 50Hz/60Hz

 Option Opt.2: 110V ±10% 50Hz/60Hz

Inspection and Installation

Steps

1. Check whether the power switch of the instrument is turned OFF.

2. Connect one end of the power cord to the AC input connector on the rear

panel of the instrument.

3. Connect the other end of the power cable to the socket configured with

protective earth.

1.7 Connect the Device Under Test (DUT)

Before connecting the DUT

To prevent electric shock and damage to the instrument, observe the following

precautions.

 Before connecting the DUT, turn off the power of the test loop to avoid the

risk of electric shock during connection.

 To avoid electrical shock, before testing, please make sure the rating

values of the testing cables, and do not measure the current that higher

than the rating value.

 Always use test cables provided by ITECH to connect the equipment. If

test cables from other factories are used, please check that the test cable

can withstand maximum current.

Specification

Test cables are not standard accessories of the instrument. Please select

optional red and black test cables for individual sales based on the maximum

current value. For specifications of test cables and maximum current values,

refer to “Specifications of Red and Black Test Lines” in “Appendix”.

Introduction of Binding Posts

The IT8500+ series (except IT8516C+) load front panel contains the following

terminals and the maximum rated current of the terminal at position (A) is the

maximum rated input current of the instrument. Securely fasten all wires by

hand-tightening the binding posts. You can also insert standard banana plugs

into the front of the connectors as shown in (B), and the maximum rated current

at (B) is 10 A.

Local measurement

1. Check whether the power switch is in Off position.

2. (Optional) Unlock the load input terminal cover.

3. Unscrew the screws of the input terminals. Connect the red and black test

cables to the input terminals. Re-tighten the screws.

When maximum current that one test cable can withstand fails to meet the

Inspection and Installation

current rated current, use several pieces of red and black test cables. For

example, the maximum current is 1,200A, then 4 pieces of 360A red and

black cables are required.

4. (Optional) Install the load input terminal cover.

5. Directly connect the other end of the red and black cables to the DUT

terminal.

Remote measurement

Remote sensing is used to counteract the effect of lead resistance. For

example, if you connect a power supply to the DC Load, the voltage at the

power supply's terminals will not be the same as the voltage at the DC Load's

terminals if there is a current flowing because of the finite resistance from the

wires. Using remote sensing, you can sense the voltage at the power supply's

terminals, effectively removing the effect of the voltage drop in the connection

wire.

When using remote sensing, the power displayed by the instrument includes

both the power dissipated inside the instrument and the power dissipated in the

leads from the power supply to the DC Load's input terminals.

Sense terminals in the rear panel displayed as follows:

Remote Sensing: SENSE (+) and SENSE (–) are the remote sensing inputs.

By eliminating the effect of the inevitable voltage drop in the DC load leads,

remote sensing provides greater accuracy by allowing the DC load to regulate

directly at the source's output terminals.

Before using the remote measurement function, you must first set the load to

remote measurement mode. The steps are as follows:

1. Press [Shift] + [9] key into the menu.

2. Press Right/Left key to select SENSE, press [Enter] key to confirm.

3. Select ON, then the remote sense function has been set.

Note:

When not using the remote measurement function, press the OFF key to

close the remote measurement mode.

4. Refer the following diagram to connect test cables.

Wiring Diagram for Remote Sensing:

Inspection and Installation

Note:

Test cables and Sense cables should be as short as possible, and Sense

cables should be twisted together.

Quick Start

Chapter2 Quick Start

This chapter introduces the front panel, the rear panel, key functions and VFD

display function of the electronic load, make sure that you can quickly know the

appearance, instruction and the key function before you operate the load. Help

you better use this series of loads.

2.1 Brief Introduction

IT8500+ series is a single-channel programmable electronic load. With power

ranges from 150W to 3000W. The user can perform online voltage

measurements and adjustments or simulate short circuit test using the simple

keypad on the front panel. IT8500+ also offers a full-featured battery mode for

discharging test. IT8500+ series DC load is a versatile instrument for static and

dynamic testing of power supplies, batteries, AC-DC/DC-DC converters, battery

chargers, provides user the best testing solution.

Model

Voltage

Current

Power

Communication

Interface

IT8511+

120V

30A

150W

DB9(TTL)

IT8511A+

150V

30A

150W

DB9(TTL)

IT8511B+

500V

10A

150W

DB9(TTL)

IT8512+

120V

30A

300W

DB9(TTL)

IT8512A+

150V

30A

300W

DB9(TTL)

IT8512B+

500V

15A

300W

DB9(TTL)

IT8512C+

120V

60A

300W

DB9(TTL)

IT8512H+

800V

5A

300W

DB9(TTL)

IT8513A+

150V

60A

400W

DB9(TTL)

IT8513B+

500V

30A

600W

Standard USB/RS232

IT8513C+

120V

120A

600W

DB9(TTL)

IT8514B+

500V

60A

1500W

Standard USB/RS232

IT8514C+

120V

240A

1500W

Standard USB/RS232

IT8516C+

120V

240A

3000W

Standard USB/RS232

2.2 Product Feature

 High-visibility vacuum fluorescent display (VFD)

 Measurement resolution: 0.1mV,0.1mA

 Voltage and current measurement speed: up to 40KHZ

 Four operation modes: CV (Constant Voltage), CC, CR,CW

 Battery test function

 OCP test, OPP test

 Measurement function: measuring voltage rise and fall time

 Automatic test function

 List mode, which can simulate a variety of load state changes

 Short circuit function

 Remote sense function

 Memory capacity to save/recall setting parameters: 100 registers

 Intelligent fans

 Build-in Buzzer as alarm signal

 Power off memory function

Quick Start

2.3 Front Panel Introduction

IT8500+ series electronic load different models have different front panels, the

front panels and keyboards of different models are shown as below.

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C+/IT8512H+/IT8513A+/IT85

13C+ Model

① Power switch

② Vacuum fluorescent display (VFD)

③ Compound key and the local switch key

④ Number key:

Set the parameters value, achieve the

menu’s function by key combination

⑤ Function key:

Set the operation mode

Control the input state: On/Off

⑥ Direction function

⑦ Rotary knob

⑧ Input terminal

IT8513B+/IT8514B+/IT8514C+ Model

① Power switch

② Vacuum fluorescent display (VFD)

③ Compound key and the local switch key

④ Number key:

Set the parameters value, achieve the

menu’s function by key combination

⑤ Function key:

Set the operation mode

Control the input state: On/Off

⑥ Direction function

⑦ Rotary knob

⑧ Input terminal

Quick Start

2.4 Front Panel Keys

( Blue-green)

The Shift composite button is used in combination

with other buttons to implement the functions

marked under these buttons.

(Gray)

Local button is used to switch local and remote

mode.

(Gray-white)

Power on/off button.

~

Enter the digits 0 to 9.

Decimal point

The escape button

Select the constant current mode and set the input

current value.

0

9

ESC

IT8516C+ Model

① Power switch

② Vacuum fluorescent display (VFD)

③ Compound key and the local switch key

④ Number key:

Set the parameters value, achieve the

menu’s function by key combination

⑤ Function key:

Set the operation mode

Control the input state: On/Off

⑥ Direction function

⑦ Rotary knob

⑧ Input terminal

Quick Start

Select the constant voltage mode and set the input

voltage value.

Select the constant resistance mode and set the

input resistance value.

Select the constant power mode and set the input

power value.

Enter the selected value or setting.

Turn on or turn off the input of the load.

The scroll up key is used to select the menu item.

The scroll down key is used to select the menu item.

Move the left and right keys to adjust the cursor to

the specified position when setting the value.

2.5 Combination Keys

Press [Shift] button first and then other keys to achieve all kinds functions in

the following table.

[Shift]+[1] (Short)

Start or stop the short circuit test.

[Shift]+[2] (Tran)

Set the transient operation parameters.

[Shift]+[3] (List)

Set the LIST operation parameters.

[Shift]+[4] (Save)

Store the parameter value of the currently load.

Including: voltage, current and power values, and

so on.

[Shift]+[5] (Battery)

Battery test function.

[Shift]+[6] (Prog)

Automatic test function.

[Shift]+[7] (Info)

Displays the model number, version number, and

serial number of the electronic load.

[Shift]+[8] (System)

System menu setting

[Shift]+[9] (Config)

Configure menu setting

[Shift]+[0] (Pause)

Pressing this button during the running of the

automatic test indicates that the automatic test is

suspended.

[Shift]+[ ] (Trigger)

Cause an immediate trigger.

[Shift]+[CC] (OCP)

Enter OCP test function.

[Shift]+[CV] (Setup)

Set detailed parameters in CC/CV/CW/CR mode.

[Shift]+[CW] (OPP)

Enter OPP test function.

[Shift]+[CR] (CR-LED)

CR-LED function setting

[Shift]+[Enter] (Recall)

Recall the load parameter values that have been

stored. Includes: voltage, current and power

settings, and so on.

[Shift]+[On/Off] (Lock)

Key lock function

2.6 VFD Annunciators

OFF

The load input is off.

Error

An error has occurred.

CC

Constant current mode

Trig

Waiting for the trigger

signal.

Quick Start

CV

Constant voltage mode

Sense

Remote sensing is turned

on.

CR

Constant resistance

mode

Prot

Protection function is

turned on.

CW

Constant power mode

Auto

Voltage range automatically

seleted function is turned

on.

Rmt

Instrument is in the

remote state.

Lock

The keyboard is locked.

Timer

LOAD ON timer is

turned on.

Shift

Shift button has been

pressed.

2.7 Rear Panel Introduction

IT8500+ series electronic load different models have different rear panels, the

rear panels and keyboards of different models are shown as below.

IT8511+/IT8511A+/ IT8511B+/IT8512+/ IT8512B+/IT8512C+/IT8512H+ Model

① Thermal window

② Line voltage selection switch

(110V/220V )

③ 3 pin IEC320 AC input connector

④ Current monitoring terminal

⑤ 9-Pin serial port interface connector

⑥ 4 pin trigger and remote sensing connector

IT8513A+/IT8513C+ Model

①Thermal window

②Line voltage selection switch

(110V/220V )

④Current monitoring terminal

⑤9-Pin serial port interface connector

⑥4 pin trigger and remote sensing connector

Quick Start

③3 pin IEC320 AC input connector

IT8513B+/IT8514B+/IT8514C+Model

① Thermal window

② Line voltage selection switch

(110V/220V)

③ 3 pin IEC320 AC input connector

④ Current monitoring terminal

⑤ RS232 communication cable interface

⑥ 4 pin trigger and remote sensing connector

⑦ USB communication cable interface

IT8516C+Model

① Thermal window

② Line voltage selection switch

(110V/220V)

③ 3 pin IEC320 AC input connector

④ Current monitoring terminal

⑤ RS232 communication cable interface

⑥ 4 pin trigger and remote sensing connector

⑦ USB communication cable interface

2.8 Power-on Selftest

A successful test process indicates that the instrument meets the factory

specifications and can be operated well.

Before operation, please confirm that you have fully understood the safety

instructions.

 To avoid burning out, be sure to confirm that power voltage matches with

supply voltage.

 Be sure to connect the main power socket to the power outlet of protective

grounding. Do not use terminal board without protective grounding. Before

operation, be sure that the power supply is well grounded.

Quick Start

 To avoid burning out, pay attention to marks of positive and negative

polarities before wiring.

Selftest steps

Normal selftest procedures:

1. Correctly connect the power cord. Press [ Power ] key to start up.

2. After selftest, VFD display information below.

Information description:

 The first line display actual voltage and current value.

 The second line display the actual power value and the setting

current/voltage/power/resistance value.

 The third line display the input state/operation mode.

3. Press [Shift] + [7], VFD display products information. You can press

direction buttons to examine product’s model/SN/software version.

Error Information References

The following error information may occur when an error occurs during Power

On self-test:

 If the EEPROM was damaged, the VFD will display “Eeprom Fail”.

 If the latest operation data in EEPROM is lost, then VFD will display

“Config Data Lost”.

 If the calibration data in EEPROM is lost, then VFD will display “Cal data

lost”.

 If the system setting data in EEPROM is lost, the VFD will display “Eeprom

data lost”. Please press [Shift] + [4] and [0] to save after setting

parameters.

Exception handling

If the electronic load cannot start normally, please check and take measures by

reference to steps below.

1. Check whether the power line is correctly connected and confirm whether

the electronic load is powered.

Correct wiring of power line => 2

Incorrect wiring of power line => Re-connect the power line and check

whether the exception is removed.

2. Check whether the power in On. [Power] key is under “ ”(On)

status.

Yes => 3

No => Please check the [Power] key to start power and check whether the

exception is removed.

3. Check whether the power voltage setting of the electronic load is larger

than the power supply voltage. If the power voltage of the load is set to

220V and the supply voltage is 110V, the electronic load will not start.

4. Check whether the fuse of electronic load is burned out.

If yes, change fuse. Detailed steps:

 Pull out power line and take out the fuse box at power line jack with a

small screw driver. As shown below.

0.0000V 0.0000A

0.00W CC=0.000A

OFF CC Auto

Quick Start

 If the fuse is fused, replace it with a fuse of the same specification

according to the model. The fuse and model matching information is

shown in the table below.

Model

Fuse specification

(220VAC)

Fuse specification

(110VAC)

IT8511+

T0.5A 250V

T1.25A 250V

IT8511A+

T0.5A 250V

T1.25A 250V

IT8511B+

T0.5A 250V

T1.25A 250V

IT8512+

T0.5A 250V

T1.25A 250V

IT8512A+

T0.5A 250V

T1.25A 250V

IT8512B+

T0.5A 250V

T1.25A 250V

IT8512C+

T0.5A 250V

T1.25A 250V

IT8512H+

T0.5A 250V

T1.25A 250V

IT8513A+

T1.25A 250V

T2.5A 250V

IT8513B+

T1.25A 250V

T2.5A 250V

IT8513C+

T1.25A 250V

T2.5A 250V

IT8514B+

T1.25A 250V

T2.5A 250V

IT8514C+

T1.25A 250V

T2.5A 250V

IT8516C+

T2.5A 250V

T5A 250V

 After replacement, install the fuse box back to original position, as

shown below.

Functions and Characteristics

Chapter3 Functions and Characteristics

This chapter elaborates on the functions and characteristics of electronic loads.

Contents following sections:

 Switching of local/remote operation modes

 Constant-status operation mode

 Input On/Off function

 Keyboard locking function

 Short - circuit analog function

 System setup function

 Triggering function

 List mode

 Test function

 Save/Recall

 VON function

 Full protection function: OCP, OVP, OTP, OPP

 Current monitoring function

 Ripple function

3.1 Local Mode/Remote Mode

There are two types of control modes for IT8500+ series products: Local mode

and Remote mode.

 Local mode: Use the buttons on the front panel of the electronic load to

perform related operations.

 Remote mode: You can operate the electronic loads through PC via

communication cable (optional). In remote control mode, the keys on the

front panel cannot work except [Local] key. Customers could through

[Local] key to switch the control mode.

3.2 Operation Mode

There are four operation modes of IT8500+ series products:

 Constant current mode (CC)

 Constant voltage mode (CV)

 Constant resistance mode (CR)

 Constant power mode (CW)

3.2.1 Constant Current Mode (CC)

Select the function key CC, the load enters the constant current mode. In the

constant current mode, the electronic load consumes a constant current

regardless of whether the input voltage changes. The relationship between

voltage and current is shown in the figure below.

Functions and Characteristics

Diagram 3-1 I-V curve in CC mode

There are two ways to set the current value:

 In CC mode, rotate the Rotary knob.

 In CC mode, input value through number keys directly, and press [Enter] to

confirm.

In CC mode, you can set the maximum operating current value.

Steps

1. Press [CC], and then press [Shift]+[CV](Setup) to enter into the

parameters setting page.

RANGE=30.000A

CC

2. Set the maximum working current value, and press [Enter] to confirm.

RANGE =10.000A

CC

3. Set the maximum working voltage value, and then press [Esc] to exit the

setup page.

Note

When you set the current range to low range, the resolution of current

will increase. Here, you can set only the voltage range, and other

parameter settings are used to edit the automatic test steps (described

below).

In CC mode, the user can also set the minimum value of the voltage, the

rising slope value of the current and the falling slope value of the current.

3.2.2 Constant Voltage Mode (CV)

In constant voltage mode, the electronic load will consume enough current to

maintain the input voltage at the set voltage.

Diagram 3-2 I-V curve in CV mode

Input current

Input voltage

I

V

Setting voltage

CV mode

Load

current

Input voltage

I

V

Setting current

CC mode

Functions and Characteristics

There are two ways to change the voltage:

 In CV mode, rotate Rotary knob.

 In CV mode, input value through number keys directly, press [Enter] to

confirm.

Steps

1. Press [CV], and then press [Shift]+[CV](Setup) to enter into the

parameters setting page.

RANGE=120.00V

CV

2. Set the maximum working voltage value, and press [Enter] to confirm.

RANGE=10.00V

CV

3. Set the maximum working current value, and then press [Esc] to exit the

setup page.

HIGH=30.000A

CV

Note

Here, you can set only the current range, and other parameter settings are

used to edit the automatic test steps (described below).

In CV mode, the user can also set the minimum value of the current.

3.2.3 Constant Resistance Mode (CR)

In constant resistance mode, the DC load will behave as a fixed resistance

value. As shown below, the load linearly changes the current value with the

rising of input voltage.

Diagram 3-3 I-V curve in CR mode

There are two ways to set the resistance value:

 In CR mode, rotate Rotary knob.

 In CR mode, input value through number keys directly, press [Enter] to

confirm.

Steps

1. Press [CR], and then press [Shift]+[CV](Setup) to enter into the

parameters setting page.

RANGE=7500.0Ω

CR

2. Set the maximum working resistance value, and press [Enter] to confirm.

RANGE =2000Ω

CR

3. Set the maximum working voltage value, and then press [Esc] to exit the

Load

current

Input voltage

I

V

Slope is equal

To the setting

resistance

CR mode

Functions and Characteristics

setup page.

HIGH=120.0V

CR

Note

In CR mode, the user can also set the minimum value of the voltage.

3.2.4 Constant Power Mode (CW)

In constant power mode, the electronic load will consume a constant power, as

shown in the figure below, if the input voltage rises, the input current will

decrease and the power P (= V * I) will remain at the setting value.

Diagram 3-4 I-V curve in CW mode

There are two ways to set the power value:

 In CW mode, rotate Rotary knob.

 In CW mode, input value through number keys directly, press [Enter] to

confirm.

Steps

1. Press [CW], and then press [Shift]+[CV](Setup) to enter into the

parameters setting page.

RANGE=150.00W

CW

2. Set the maximum working resistance value, and press [Enter] to confirm.

RANGE =100.00W

CW

3. Set the maximum working voltage value, and then press [Esc] to exit the

setup page.

HIGH=120.00V

CW

Note

In CW mode, the user can also set the minimum value of the voltage.

3.3 Input On/Off Control

[On/Off] button on the front panel is used to manually control input on or off.

 [On/Off] button lighted indicates the load input is turned on, and the

real-time voltage and current information about the current loop is

displayed on the VFD screen.

Functions and Characteristics

 When the [On/Off] button light is off, the lower left of the VFD displays OFF,

indicating that the input is turned off.

3.4 Key Lock Function

Press the combined keys [Shift] +[On/Off] (Lock) to lock the front panel keys,

and VFD will display a Lock label. In this functional state, all keys except the

following keys are invalid. Pressing [Shift] +[On/Off] (Lock) again will cancel

the lock.

 The [On/Off] button is available to toggle the input on and off.

 The combined keys [Shift]+[7] (Info) is available to view the instrument

information. When viewing the instrument information, press [Esc] to exit.

3.5 Short-circuit Analog Function

Short circuit simulation and short circuit current measurement: you may press

[Shift] + [1] (Short) button to emulate a short state. It can be used to check

whether the tested instrument’s short protection is available.

Press [Shift] + [1] (Short) to switch the short circuit condition. The short-circuit

operation does not affect the current set value. When you press [Shift] + [1]

(Short) again, the electronic load returns to the original setting state.

In the short-circuit status, the actual consumed current value depends on the

operating mode and current range of the load. In CC, CW and CR modes, when

the current is within the maximum range, the short-circuit current is the input

current value. When the current exceeds the maximum range, the maximum

short-circuit current is 110% of the range. In the CV mode, the short circuit is

equivalent to setting the constant voltage value of the load to 0V.

3.6 System Menu (System)

Press [Shift] + [ 8 ] (system) to enter the system menu.

POWER-ON

Power on state of instrument

RST(default)

Do not remember state in SAVE 0. Customer can save

an often used data in SAVE 0 to recall when power on

the DC load next time.

SAV0

Remember state in SAVE 0

BUZZER

Buzzer status setting

ON(default)

Enable audible beep when key is pressed.

OFF

No sound when key is pressed.

KNOB

Real-time update function of knob

UPDATE(default)

The value modified with knob during operation will be

saved after input is off. For example, the DC load is set

to 1A by press [CC] and turned on the input. Then

increase the setting value to 2A with knob. When

customer turn off input, the setting value is still 2A.

OLD

As explained above, after the input is turned off, the

setting value is 1A instead of 2A.

TRIGGER

SOURCE

Set trigger mode

MANUAL(Def)

Triggered from the [Shift] + [.] key.

EXTERNAL

Triggered from a TTL high signal at the trigger

connector on rear panel

BUS

Triggered from a serial bus command 5AH

HOLD

Receiving a command 9DH

MEMORY

Use with the Recall button to call up

the stored parameters.

GROUP= 0

0: indicates1-10 groups;

Functions and Characteristics

1: indicates 11-20 groups, and so on.

DISPLAY

DISP-TIMER

Timer function

ON

Enable timer function

OFF(default)

Disable timer function

RS-232

4800_8N 1

Baud rate 4800, data bit 8, none parity, stop bit 1

9600_8N 1

Baud rate 9600, data bit 8, none parity, stop bit 1

19200_8N 1

Baud rate 19200, data bit 8, none parity, stop bit 1

38400_8N 1

Baud rate 38400, data bit 8, none parity, stop bit 1

PROTOCOL

SCPI

Select SCPI protocol

FRAME

Select FRAME protocol

ADDRESS

ADDRESS= 0

Set the instrument’s address(0~31)

RUNMODE

RUN

Running mode at power on

NORMAL

Normal mode

BATTERY

Default in battery test mode at power on

PROG_TEST

Default in automatic test mode at power on

OCP_TEST

Default in OCP test mode at power on

OPP_TEST

Default in OPP test mode at power on

TESTMOD

TESTMODE

Automatic test editing mode

NEW

IT8500+ specialized automatic test editing mode

IT8500

Compatible with IT8500 Automatic Test Edit Mode

DEFAULT

Factory default setting

NO

Do not return instrument to factory default settings.

YES

Return instrument to factory default settings.

> DEFAULT

This option is used to restore all settings in the system menu to factory setting

values. Select “YES” and press [Enter] to restore to factory setting values.

Otherwise, the original system menu settings will remain unchanged.

The factory system menu is as follows:

Power-on

Rst

Buzzer

On

Knob

Update(default)

Trigger

Mannual

Memory

Group=0

Displ

Off (default)

>Power-on

When the power-on parameter is selected as RST, the input state when the

load is powered on is the factory state. If SAV0 is selected, the input state at

power-on of the load is the value of SAVE 0.

>Trigger

When using the transient and list function, you need to use the electronic load

Functions and Characteristics

trigger function, you can choose Manual, External, Hold, or Bus as the trigger

mode. For the Manual option, the trigger signal is provided by composite keys

[Shift]+ [.](Trigger) in front panel.

>Buzzer

This item can set the key sound state. If in On mode, the electronic load will

issue beeper sound when you press any button. If in Off mode, the beeper will

not make a sound. The default set is in on mode.

>Knob

 When the load input is turned on and the knob is turned to change the set

value, if the UPDATE option is selected, the load value is still the current

value after the load input is turned off;

 If the OLD option is selected, the set value returns to the original value after

the load input is turned off.

>Display

 If the option is set to On, the display of time 0.0000S will appear on the left

side of the VFD. Turn on the load input, the load time recording is started;

turned off the load input, the recording is stopped.

 If the option is set to Off, the load time is not recorded.

3.7 Config Menu (Config)

Press [Shift]+ [ 9 ] (Config) to enter the configuration menu.

PROTECT

Max-P

Set hardware power protection

MAX POWER=150.00W

Set hardware OPP value

A-LIMIT

Set software current protecting state

ON

Enable software OCP function

A-LIM POIN=30.000A

Set the software OCP level

A-LIM DELAY=3S

Set the OCP delay time

OFF

Disable the software OCP function

P- LIMIT

Set software power protecting state.

P-LIM POIN=150.00W

Set the software OPP level.

P-LIM DELAY=3S

Set the OPP delay time.

TIMER

Set load on timer

ON

Enable load-on timer

LOAD-TIMER=10.0S

Set the load-on duration (0.1S~9999.9S)

OFF

Disable load-on timer

MEASURE

V-RANGE

Voltage range automatic switching

function

ON

Enable voltage auto range function

OFF

Disable voltage auto range function

FILTER

Set the filter parameter

FILTER COUNT = 2^14

Filter count set, ranges from 2 to 16.

Functions and Characteristics

TIME-V1

TIME-VOLT1=0.000V

Set the start time to measure the voltage rise/fall time.

TIME-V2

TIME-VOLT2=120.00V

Set the end time to measure the voltage rise/fall time.

SENSE

REM- SENSE

Remote sense function

ON

Enable remote sense function

OFF

Disable remote sense function

VON

Set the load’s VON point. For details,

see 3.12 VON Function.

LIVING

VON point living state

VON POINT = 0.10V

Set the VON value

LATCH

VON point latch state

VON POINT = 0.10V

Set the VON value

RESET

Reset the configuration menu.

NO

Do not reset the configuration menu.

YES

Reset the configuration menu.

>FILTER

This menu can set the number of sampled data during filtering. The average

value of the sampled data is taken during filtering. The setting range is 2~16.

>V-RANGE

This menu is used to control whether the voltage measurement range is

changed automatically.

 On: Indicates the voltage measurement range will automatically change

between the high range and the low range.

 Off: Indicates the voltage measurement range will not automatically

change.

>RESET

This option is used to restore all settings in the CONFIG MENU to factory

setting values. Select “YES” and press [Enter] to restore to factory setting

values. Otherwise, the original CONFIG MENU settings will remain unchanged.

3.8 Trigger Function

Triggering is used with the transient operation; list operation and auto-test

function. There are four types of triggers you can use for IT8500+ products.

Manual: An immediate trigger is created by pressing [Shift]+ [ ] (Trigger) on

the front panel.

External (TTL signal): On the rear panel of the electronic load, TRIG is the

trigger input terminal. When the external signal trigger mode is valid, after the

low pulse (>10uS) is applied to this terminal, the load will perform a trigger

operation. When the external trigger is selected, the positive and negative

terminals of TRIG generate the trigger signal, and the low pulse is valid. A

trigger-corresponding input can be used to change the set value (voltage,

current, resistance, etc.) to toggle between set points in the transient trigger

mode, or to generate pulses in the transient pulse mode.

Functions and Characteristics

Bus: The instrument will be triggered if command 5AH is sent via the

communication interface.

Hold: The instrument will be triggered if command 9DH is sent via the

communication interface.

The steps to select a trigger source are as follows:

Steps

1. Press [Shift] + [8] (system) to enter the system menu.

POWER-ON BUZZER

2. Press the right key to move to TRIGGER, and press [Enter] to enter the

trigger source setting page.

SOURCE MANUAL

3. Select the trigger source and press [Enter].

MANUAL EXTERNAL BUS HOLD

4. Press [Esc] to exit the setting page.

3.9 LIST Operation

LIST mode provides an accurate, fast and low-cost way to complete any

complicated current change mode, which enables synchronization of internal or

external signals in multiple quasi-bit load precision tests.

When different trigger sources are selected, the LIST function will form a variety

of complex sequences by editing step value, pulse width and slope of each step

to meet complicated test requirements. LIST parameters comprise designation

of input list file, input step count (2-84 steps at maximum), step time (0.00005s

– 3600s) as well as setting value and slope of each step. The number of times

the List file is repeatedly executed ranges from 1 to 65535. The list file can be

stored in non-volatile RAM available for a quick output in case of usage. The

user can edit 7 groups of list files at maximum.

If the load operation mode is at List operation, the load will start List operation

when it receives a trigger signal and will stop when it complete or when it

receives another trigger signal.

You can press the keys on the front panel of the electronic load to edit the

sequence operation files, and trigger this sequence operation. Or you may

directly recall existing sequence operation files to trigger the sequence

operation. For example, when the DUT output voltage is 10V and the output

current is 3A, after editing the sequence operation files under Constant Current

(CC) mode, the steps for triggering sequence operation are as follows:

Trigger

10 2 3 4 5

List count=1 List count=2

List sequence

Functions and Characteristics

Operation steps

1. Press [Shift]+[3] keys, the interface displayed as follows:

LIST OFF CALL EDI

2. Operate key and move to EDI. Press [Enter] key.

3. Set the CC range.

LIST RANGE=3A

4. Edit number of steps. Press [2] key to edit two steps. Press [Enter] key.

LIST STEP=2(2-84)

5. Edit current value in step 1 and press [Enter] key.

STEP 01 =1A

6. Edit slope in step 1 and press [Enter] key.

STEP 01 =0.1A/US

7. Edit time in step 1 and press [Enter] key.

STEP 01 =5S

8. Edit current value in step 2 and press [Enter] key.

STEP 02 =2A

9. Edit slope in step 2 and press [Enter] key.

STEP 02 =0.1A/US

10. Edit time in step 2 and press [Enter] key.

STEP 02 =5S

11. Edit repeat count and press [Enter] key.

REAPEAT =3

12. Save the edited file and press [Enter] key.

SAVE LIST =1(1-7)

13. Operate key and move to OFF. Press [Enter] key (In this case,

OFF changes to ON, and the VF status indicator Trig lamp of the VFD

display is illuminated). Press [ESC] key to exit setting.

LIST OFF CALL EDI

14. Press [On/Off] key to open input and press [Shift] + key (Trigger key).

15. Press [CC]/ [CV]/ [CR]/ [CW] key or any composite function key to exit List

test function.

For direct recall of existing List files and triggering of List operation, refer to

steps below:

Operation steps

1. Press [Shift] +3 keys.

LIST OFF CALL EDI

Ensure that OFF lamp flicks. If not, press [Enter] to change the lamp from

ON to OFF.

2. Press key to select CALL. And press [Enter] for confirmation.

3. Select edited file and press [Enter] for confirmation.

RECALL LIST = 1

Functions and Characteristics

4. Operate key and move to OFF. Press [Enter] key (In this case,

OFF changes to ON, and the VF status indicator Trig lamp of the VFD

display is illuminated). Press [ESC] key to exit setting.

LIST OFF CALL EDI

5. Press [On/Off] key to open input and press [Shift] + key (Trigger key).

L1. 0. 0

Trig

3.10 Test Function

The transient test allows switching between two different load values. A

common application is to test the dynamic characteristics of DC source.

There are three different types of transient operation: continuous, pulse,

toggled.

Transient test parameters include:

 Transient test mode

 Transiently switched A and B values

 Pulse width time (In PULSE mode)

 Frequency

 Duty cycle

 Current rise and fall slope (CC mode specific parameters)

3.10.1 Transient Test Function

Continuous Mode

In continuous transient operation, the load is continuously switched between

two load values. An example is shown in the following figure:

Take CC mode as an example (other modes operate similarly). When the

measured instrument output voltage is 10V, current is 3A, and load current is

switched between 1A and 2A, the transient test parameters and steps are set

as follows:

1. Press [Shift]+[2] (Tran), move key to select ON, press [Enter] to

confirm.

TRAN ON OFF

2. Press to select transient operation mode as CONTINUOUS (the

indicator lamp Trig will be lighted).

MODE CONTINUOUS

PULSE TOGGLE

Functions and Characteristics

3. Set the rising slope, press [Enter] to confirm.

UP=1A/uS

4. Set the descending slope, press [Enter] to confirm.

DOWN=1A/uS

5. Set level A, press [Enter] to confirm.

LEVEL A=1A

6. Set level B, press [Enter] to confirm.

LEVEL B=2A

7. Set the frequency, press [Enter] to confirm.

FREQ=50HZ

8. Set the duty factor, press [Enter] to confirm.

DUTY=98%(0.1%-99.9%)

9. Open the transient test function, maintain on the “on” selection, press

[Enter] to confirm.

TRAN ON OFF

10. Then the VFD will display TRAN and Trig.

10.0000V 0.0000A

0.00W TRAN. 0

Trig

11. Press [On/Off] to turn on the input function, and press [Shift]+[ ]

(Trigger) to trigger.

It can be seen that the A/B value is continuously switched, and the number

of running times is visible in the lower right corner.

Note

The maximum number of running times is 65535 and then reset to zero. The

running times reset does not affect the execution of the transient test.

12. Press any key of CC/CV/CR/CW or other composite function keys to exit

the transient test function. If you need to continue transient test parameter

setting and perform transient test, repeat steps 1 to 11.

Pulse Mode

In pulse operation, the load operates at the A value that has been entered until

a trigger is received. At the trigger, the load switches to the B value and stays at

that level for the B timing value. Then the load switches back to the A value and

stays there until another trigger is received.

Take CC mode as an example (other modes operate similarly). When the

Functions and Characteristics

measured instrument output voltage is 10V, current is 3A, and load current is

switched between 1A and 2A, the transient test parameters and steps are set

as follows:

1. Press [Shift]+[2] (Tran), move key to select ON, press [Enter] to

confirm.

TRAN ON OFF

2. Press to select transient operation mode as PULSE (the indicator

lamp Trig will be lighted).

3. Set the rising slope, press [Enter] to confirm.

4. Set the descending slope, press [Enter] to confirm.

5. Set level A, press [Enter] to confirm.

6. Set level B, press [Enter] to confirm.

7. Set the WIDTH, press [Enter] to confirm.

8. Open the transient test function, maintain on the “on” selection, press

[Enter] to confirm.

9. Then the VFD will display TRAN and Trig.

10. Press [On/Off] to turn on the input function, and press [Shift]+[ ]

(Trigger) to trigger.

11. Press any key of CC/CV/CR/CW or other composite function keys to exit

the transient test function. If you need to continue transient test parameter

setting and perform transient test, repeat steps 1 to 10.

Toggled Mode

In toggled transient operation, the load starts at the stored parameters for the

mode. When a trigger is received, the load switches to B value. When another

trigger is received, the load switches to the A level. It stays at the A value until

another trigger is received, at which point it switches to the B value. Here’s an

example:

Take CC mode as an example (other modes operate similarly). When the

measured instrument output voltage is 10V, current is 3A, and load current is

switched between 1A and 2A, the transient test parameters and steps are set

as follows:

1. Press [Shift]+[2] (Tran), move key to select ON, press [Enter] to

confirm.

TRAN ON OFF

2. Press to select transient operation mode as TOGGLE (the

indicator lamp Trig will be lighted).

10A

5A

TRG

Toggled Transient Operation

Functions and Characteristics

3. Set the rising slope, press [Enter] to confirm.

4. Set the descending slope, press [Enter] to confirm.

5. Set level A, press [Enter] to confirm.

6. Set level B, press [Enter] to confirm.

7. Open the transient test function, maintain on the “on” selection, press

[Enter] to confirm.

8. Then the VFD will display TRAN and Trig.

9. Press [On/Off] to turn on the input function, and press [Shift]+[ ]

(Trigger) to trigger.

10. Press any key of CC/CV/CR/CW or other composite function keys to exit

the transient test function. If you need to continue transient test parameter

setting and perform transient test, repeat steps 1 to 9.

3.10.2 OCP Test Function

IT8500+ series electronic load supports the over current protection (OCP) test

function. In the OCP mode, when input voltage reaches VON point, the DC load

start to draw a current from the source after a delay time. The current value will

increase by a certain step size at regular intervals. Simultaneously, the DC load

will judge whether the input voltage exceeds OCP voltage you’ve set. If it is,

indicates that the OCP has not occurred, then repeat the current stepping

operation until the cutoff current is reached; if not, it indicates that the OCP has

occurred, and then check whether the current value is within the target range. If

it is within the range, PASS, otherwise FAULT. In other words, there are two

conditions for the end of the OCP current step, and if anyone is satisfied, the

stepping operation of the current will be ended.

 Reach the set cutoff current.

 The measured power supply voltage is less than the OCP voltage setting

value.

Press [Shift]+ [CC] (OCP) to enter the OCP operation page, and the related

parameters are described as follows.

No.

Parameter

Description

1

VON LEVEL=0.000V

Set the Von voltage value.

2

VON DELAY=0.00S

Set the Von voltage delay time.

After delay certain time, the

DC load starts to draw

current.

3

RANGE=3.000A

Set the working current range.

4

START=0.1000A

Set the initial current.

5

STEP=0.1000A

Set the step current.

6

STEP DEL=0.20S

Set delay time of each step.

7

END=2.0000A

Set the cutoff current.

8

OCP VOLT=2.000V

Set the OCP voltage.

9

MAX TRIP =1.5000A

Upper limit of OCP value.

10

MIN TRIP=0.9000A

Lower limit of OCP value

11

SAVE OCP FILE=1

Save OCP test file (1-10)

Functions and Characteristics

Set the power on mode to the OCP test mode:

1. Press [Shift]+ [8] (system) to enter into system menu

0.0000V 0.000A

POWER-ON BUZZER

2. Press right key, select RUNMODE and confirm with [Enter] button.

0.0000V 0.000A

RUN NORMAL

3. Press to select OCP_TEST, press [Enter] to confirm.

The VFD displays the OCP test page.

0.0000V 0.000A

STOP 0.000A

4. After above steps, press [.] (Trigger) button to run OCP_TEST file.

Note

To exit the OCP mode, you can press the [Shift]+ [8] (System) buttons

to enter the system menu and set the RUNMODE to NORMAL.

3.10.3 OPP Test Function

IT8500+ series electronic load supports the over power protection (OPP) test

function. In the OPP mode, when input voltage reaches VON point, the DC load

start to draw a power from the source after a delay time. The power value will

increase by a certain step size at regular intervals. Simultaneously, the DC load

will judge whether the input voltage exceeds OPP voltage you’ve set. If it is,

indicates that the OPP has not occurred, then repeat the power stepping

operation until the cutoff power is reached; if not, it indicates that the OPP has

occurred, and then check whether the power value is within the target range. If

it is within the range, PASS, otherwise FAULT. In other words, there are two

conditions for the end of the OPP power step, and if anyone is satisfied, the

stepping operation of the power will be ended.

 Reach the set cutoff power.

 The measured power supply voltage is less than the OPP voltage setting

value.

Press [Shift]+ [CW] (OPP) to enter the OPP operation page, and the related

parameters are described as follows.

No.

Parameter

Description

1

VON LEVEL=0.000V

Set the Von voltage value.

2

VON DELAY=0.01S

Set the Von voltage delay time.

After delay certain time, the DC

load starts to draw power.

3

RANGE=5A

Set the working current range.

4

START =0.1W

Set the initial power.

5

STEP =1W

Set the step power.

6

STEP DEL=1S

Set delay time of each step.

7

END =12W

Set the cutoff power.

8

OPP VOLT=7V

Set the OPP voltage.

9

MAX TRIP =6.5W

Upper limit of OPP value.

Functions and Characteristics

10

MIN TRIP =5.6W

Lower limit of OPP value

11

SAVE OPP FILE=1

Save OPP test file (1-10)

Set the power on mode to the OPP test mode:

1. Press [Shift]+ [8] (system) to enter into system menu

0.0000V 0.000A

POWER-ON BUZZER

2. Press right key, select RUNMODE and confirm with [Enter] button.

0.0000V 0.000A

RUN NORMAL

3. Press to select OPP_TEST, press [Enter] to confirm.

The VFD displays the OPP test page.

0.0000V 0.000A

STOP 0.00W

4. After above steps, press [.] (Trigger) button to run OPP_TEST file.

Note

To exit the OPP mode, you can press the [Shift]+ [8] (System) buttons

to enter the system menu and set the RUNMODE to NORMAL.

3.10.4 Battery Discharge Test

IT8500+ series electronic load supports the discharge test function of the

battery in CC/CW/CR mode.

The test mode should be set first, and then the discharge stop conditions.

There are three discharge stop conditions to be set for IT8500+ series products,

which are STOP VOLT, STOP CAP, and STOP TIMER. When any of the three

conditions is satisfied, the discharge is stopped and the electronic load is

automatically switched to the OFF state.

When user only need to do battery testing in one or two stop conditions, the

other conditions should be set to the specified value (STOP VOLT:0V; STOP

CAP:999.999AH; STOP TIMER:99999S).

For example, if the stop voltage is used as the termination condition and the

stop voltage is set, the stop capacity and the stop time must be set to the

maximum value (STOP CAP = 999.999AH, STOP TIMER=99999S).

When the system checks the discharging time or battery voltage or capacity is

equal to the setting stop value or under an insecurity state, the battery test will

be interrupted. The battery voltage, discharge time and discharged capability

are displayed on the VFD while testing.

Battery Test Data Storage

Before programming the battery test parameters, select RUNMODE as

NORMAL.

The following describes the operation steps by taking a discharge current of 7 A,

a cutoff voltage of 35 V, and a cutoff capacity of 11 AH as an example.

1. Press [Shift]+ [5] (Battery), set current range, and then press [Enter].

0.0000V 0.000A

RANGE =30.000A

Functions and Characteristics

2. Set the discharge current, and press [Enter].

0.0000V 0.000A

CURRENT= 7.000A

3. Set the discharge stop voltage, and press [Enter].

0.0000V 0.000A

STOP VOLT= 35.00V

4. Set the discharge stop capability, and press [Enter].

0.0000V 0.000A

STOP CAP= 11.000AH

5. Set the discharge time, and press [Enter].

0.0000V 0.000A

STOP TIMER= 99999S

6. Save the battery test to specified file (1 – 10). After the file number is set,

press [Enter].

0.0000V 0.000A

SAVE BATT FILE 2

Set the power on state to the battery test. The steps are as follows.

1. Press [Shift]+ [8] (system) to enter into system menu.

0.0000V 0.000A

POWER-ON BUZZER

2. Press right key, select RUNMODE and confirm with [Enter] button.

0.0000V 0.000A

RUN NORMAL

3. Press to select BATTERY, press [Enter] to confirm.

The VFD displays the battery test page.

0.0000V 0.000A

0S 0.000AH

4. After above steps, press [.] (Trigger) button to run BATT_TEST file.

The discharging process will be terminated automatically when stop

conditions are reached.

Note

To exit the BATTERY mode, you can press the [Shift]+ [8] (System)

buttons to enter the system menu and set the RUNMODE to

NORMAL.

Battery Test Data Recalling

Applicable to IT8511B+/IT8512+/IT8512B+/IT8512C+/IT8512H+/IT8514C+

models. The steps are as follows:

1. In the BATTERY mode, press [Shift]+ [Enter] (Recall).

0.0000V 0.000A

RECALL BATTERY 1

2. Press the number keys to select the existing BATT_TEST file and press

[Enter].

Functions and Characteristics

Start Battery Test

In the BATTERY mode, you can press [.] (Trigger) to trigger the running of the

battery test. If the load does not detect the battery voltage, or if the stop

condition has been satisfied, the test will be stopped immediately and the input

of the load will be in OFF state.

During normal testing, the test time, the discharged capacity will be displayed

on the VFD in real time.

During the running of the battery test, the front panel can be locked to avoid

misoperation and interrupt the test process. If you need to lock the panel, press

[Shift]+[On/Off] (Lock) to lock all other keys except [Shift]+[On/Off] (Lock)

itself.

Stop Battery Test

Press [.](Trigger) or [Shift]+[.] (Trigger) or [ESC] to stop battery discharge test

(load input OFF).

Exit Battery Test

To exit the BATTERY mode, you can press the [Shift]+ [8] (System) buttons to

enter the system menu and set the RUNMODE to NORMAL.

3.10.5 CR-LED Test Function

With adding of diode break-over voltage setting in the IT8500+ series electronic

load under conventional CR mode, the electronic load only works when voltage

applied at its both ends is higher than the diode break-over voltage to give a

real simulation of diode working principle, i.e., the ripple current at real LED

test.

The I-V curve of LED is as shown below. Under conventional CR mode, the

electronic load only simulates the static working point of diode as shown in the

red circle of the following figure. It is unable to verify the dynamic characteristics

of LED under normal working conditions, and the status of accurate ripple

current.

Calculation method of Vd and R:

Definition:

 Vo: constant working voltage of load LED of LED constant current source;

 Io: output current of LED constant current source;

 Vd: break-over voltage of diode (string);

 R: constant resistance.

V-I curve of LED is as shown below.

Functions and Characteristics

According to four parameters above and the V-I curve of LED, you can

calculate the value of R and Vd.

12

II

VV

R





 

RIVV 

0od

NOTE

The value of V2, V1, I2 and I1 should be close to the static working point of LED as

shown in the red circle above.

Or you can roughly calculate the value of R and Vd with the following equation.

V

d

=V*0.8 R=0.2V/I

Where:

 V: constant working voltage of load LED of LED constant current source;

 I: output current of LED constant current source;

 V

d

: break-over voltage of diode (string);

 R: constant resistance.

In the following example, the output voltage of LED driver is 50V, verify that

whether the output current of LED is rated current 200mA: Vd=50V*0.8=40V

R=(0.2*50V)/0.2A=50Ω.

Setting CR-LED Mode

Example: LED driver specification

The output current is 200mA and the range of output voltage is from 45V to

62V.

Operating steps:

1. Start CR-LED function and set the Vd value.

1) Press [Shift] + [CR] keys to enter configuration menu.

2) Press Right Key and select ON. Press [Enter] key to set the Vd value.

(Set Vd=40V).

Select OFF to disenable CR-LED function, and then press [Enter] to

exit the setting menu.

3) Press the [Enter] key to save the settings.

2. Set CR mode

1) Press [CR] key and set corresponding constant resistance. (Set

CR=50Ω)

2) Press the [Enter] key to save the settings.

3. Press [On/Off] key to turn on load input.

Functions and Characteristics

3.10.6 Measurement of Voltage Rise Time

The IT8500+ series electronic load is provided with special voltage rise/drop

time measurement function. This function gives a simple analog of voltage

rise/drop speed of oscilloscope test power.

Operation methods:

Set initial Voltage and Final Voltage

1. Press [Shift] + [9] keys to enter configuration menu. Press Right key.

Select Measure and press [Enter] key.

2. Press to select TIMEV1. Press [Enter] key. Press numeric keys

to set initial voltage value and press [Enter] key.

3. Press to select TIMEV2. Press [Enter] key. Press numeric keys

to set final voltage value and press [Enter] key.

4. Press [ESC] to exit setting.

Start timer function

5. Press [Shift] +[8] keys to enter system menu. Press Right key till

“DISPLAY” flicks and press [Enter] key.

6. Press key to select “On”. Start timer function and press [Enter]

key.

7. Press [ESC] to exit setting.

8. VFD second line will display time 0.0000S.

0.0001V 0.0002A

0.0000S I= 0.000A

OFF CC

Measurement of Rise Time

9. Connect DC power to be tested to the input terminal of the electronic load.

The power is set with a value that is higher than the set final voltage value.

Keep power output in OFF status.

10. Set a constant current value on the load and open the load input.

11. Open the power output.

12. The electronic load timer starts timing. After ending, time will keep stable,

which is rise time of voltage.

13. Turn off the power output. The electronic load VFD will display voltage drop

time.

3.11 Saving and Recalling Settings

We can save some often-used parameters in the non-volatile memory,

including working mode, voltage/current value and so on. IT8500plus series

provide 100 non-volatile registers.

They are divided into 10 Memory groups: Group0-9.You can set it in the system

menu.

 Group0 means you can save and recall parameters in 0-10 registers.

 Group1 means you can save and recall parameters in 11-20 registers.

 Group2-Group9 can be concluded in the same manner.

Functions and Characteristics

Save and Recall operation

For example: the instrument works in CC mode, setting value is 1A, memory

Group is 7. Save “CC 1A” in the 76th register and then recall.

 Save

1. Set the parameters ok (CC 1A), and press [Enter].

2. Press [Shift] + [4] (Save) to save the instrument's settings to a register.

3. Enter number [7] and [6], indicates the settings is saved in the 6th register

in Group7.

4. Press [Enter], the setting is saved.

 Recall

1. Press [Shift] + [8] (System) to enter the system setting page.

2. Press the right key to select MEMORY, and press [Enter].

3. Set the value of Group to 7, the interface displayed as follows.

MEMORY GROUP = 7

4. Press [Enter] to confirm the setting.

5. Press [Shift] + [Enter] (Recall) to execute the data recalling operation.

At this point, the [Enter] key light is on.

6. Enter number [6], indicates the data saved in the 6th register in Group7 is

recalled.

3.12 VON Function

When testing some power supply products with a slower voltage rise, if the

input of the electronic load is turned on first, and then the power is turned on,

the power supply may enter the protected state. Therefore, the user can set the

VON value, and when the power supply voltage is higher than this value, the

electronic load starts to load.

Please confirm whether you need to set the VON voltage. The VON voltage is

set to facilitate the user to limit the working voltage, and if you do not need to

set the VON voltage, do not set this value, otherwise it may result in unloading.

You can press [Shift]+[9] (Config) to enter the configuration menu to set the

VON voltage to control the ON/OFF state of the electronic load. The load has

two performance modes, Living and Latch. When Living is selected, it indicates

that the load works in following state; when Latch is selected, it indicates that

the load works in the load latched state.

If your instrument can not work normally, for example, set CC=1A, after turn on

the input while the current is still 0A instead of setting value 1A, then you should

check VON set firstly. If VON set is not 0V, then please modify to 0V. If the

minimum voltage supported by the instrument is not 0V, the setting menu will

be automatically set to the minimum value after pressing 0.

 VON LIVING MODE

In Living mode, when power is applied to the DC load, the voltage must rise

above VON setting before the load draws current from the source. If the

voltage below VON setting on the load’s terminals, the load will turn off

input.

Functions and Characteristics

 VON LATCH MODE

In Latch mode, as before, the load will turn on only when the voltage

exceeds VON setting, but once on, it will now stay on, even if the voltage

drops to zero.

3.13 Protection Function

IT8500+ series electronic load supports the following protection function:

 Over voltage protection (OVP)

 Over current protection (OCP)

 Over power protection (OPP)

 Over temperature protection (OTP)

Functions and Characteristics

If any of the above protections are activated, the electronic load enters the

corresponding self-protection mode, such as over temperature protection, the

load will generate an alarm and the input will automatically switch to the OFF

state. The VFD will display the OTP. You can clear the protection by pressing

any button on the front panel.

Over voltage protection (OVP)

If input voltage exceeds the voltage limit set by the user, the DC load will turn

the input OFF and the buzzer will sound. The display will show OVP.

Press any key on the front panel to exits OVP protection state.

Over current protection (OCP)

The DC load includes both hardware and software over current protection

features.

 Hardware OCP: Maximum input current of the DC load will be limited at

about 110% of the current range, once the hardware OCP is activated, the

status register’s OC bit will be set; when the hardware OCP is removed,

the status register’s OC bit will be reset. Hardware over current protection

will not change the DC load’s On/Off state.

 Software OCP: When the software OCP function is turned on, if the load

current exceeds the OCP set value and continues to exceed the set delay

time, the load will automatically turn OFF and the VFD will display OCP. At

the same time, the OC and PS bits in the status register will be set and they

will remain until they are reset. For related configuration items and

descriptions, see 3.7 Config Menu (Config).

Over power protection (OPP)

The DC load includes both hardware and software over power protection

features.

 Hardware OPP: You can set the hardware OPP value of the load. The load

will be limited by the hardware to the power value. Hardware OPP does not

change the DC load’s On/Off state.

 Software OPP: You can also set the software OPP value of the load.

For related configuration items and descriptions, see 3.7 Config Menu

(Config).

Over temperature protection (OTP)

When the electronic load internal power device temperature exceeds about

85°C, the electronic load activates the temperature protection mode. At this

time, the load input will be automatically turned OFF, and the VFD will display

the OTP. At the same time, the OT and PS bits in the status register will be set

and they will remain until they are reset.

3.14 Current Monitoring (I Monitor)

Current monitoring terminal will output 0-10V analog signal to

corresponding to 0 to full range of input current. You can connect an external

voltmeter or an oscilloscope to display the input current’s changing.

3.15 Ripple Function

IT8500+ series DC electronic loads have test ripple function. In the main

interface by pressing the up and down keys, you can read the VPK, APK value

Functions and Characteristics

in the place where shows the power value. You can read ripple voltage and

ripple current by sending instructions also. See in IT8500+ programming

guide.

Automatic Test Function

Chapter4 Automatic Test Function

This chapter introduces the IT8500+ series electronic load automatic test

operation method and process.

4.1 Introduction

The IT8500+ has two automatic test editing modes. One is the IT8500+ special

editing mode, which can save up to 10 groups of test files, and the other is

compatible with the IT8500 automatic test editing mode which can save up to

50 groups of test files. The test files in both modes can be recalled and tested

at any time. The test is simple and the button can be locked (press

[Shift]+[On/Off] (Lock)) to prevent accidental touches on the keyboard and

affect normal testing.

The electronic load automatically detects the change of the input voltage to

determine whether to start the test. After the automatic test start voltage (Start)

is set and the DUT is connected, when the load detects that the input voltage

rises from 0 to the Start voltage, the automatic test starts running without the

external trigger source or a trigger signal provided by manually operation.

When editing the automatic test mode, please avoid setting the last step to

short circuit, and avoid setting the input voltage of the last step to a value less

than the Start voltage, otherwise the automatic test will be executed cyclically.

4.2 Automatic Test Mode Switching

Press [Shift]+[8] (System) to enter the system menu, and press to

select the TESTMOD item. The VFD displays NEW and 8500. You can select

one of them and press [Enter] to confirm.

 NEW

This is the automatic test mode for IT8500+ series electronic load.

This mode supports editing 10 groups of test files (file1 – file10), each

group contains 10 steps, and 10 groups of test files can be saved in

EEPROM. Test files can be linked to each other (such as linking file1 to

file2). Each test file contains the following parameters: load mode

(CC/CV/CR/CW, current rise and fall slope can be set in CC mode), load

value (Value), load time (Ton), unload time (Toff)), delay time (Tpf), upper

and lower limit of decision value (Low & High), trigger voltage (Start).

 8500

This is the automatic test mode compatible with IT8500 series electronic

load.

This mode supports storing up to 50 groups of test files (file1-file50). Each

group contains 10 steps, and 50 groups of files can be saved in EEPROM.

Test files cannot be linked to each other. Each test file contains the

following parameters: load mode (CC/CV/CR/CW), load value (Value),

delay time (Delay), upper and lower limit value (Min & Max), trigger voltage

(Start).

The storage of test files under the two test modes is independent of each other,

that is, file1 in two modes is stored in different storage spaces.

Automatic Test Function

Automated testing can be used to program, test, and show whether a test

passes or fails, which is very useful for the customer. The automatic test

operation consists of four steps: editing, saving, recalling, and running.

4.2.1 Test Mode for IT8500+

Note

The “Y” appears in the following edit to indicate the selected state, and press

the number key of the corresponding step again to deselect the state.

Operation Steps

1. Press [Shift]+[6] (Prog).

ACTIVE =0987654321

2. Press the number keys to select the step to be tested, for example,

ACTIVE =09876543YY, indicating that you have selected steps 1 and 2

and press [Enter] to confirm.

3. In these two steps, if you need to pause in step 2, you can press [2].

Otherwise, press [Enter] directly.

PAUSE =NNNNNNNNY1

4. In these two steps, if you need the short-circuit test in step 1, you can press

[1].

Otherwise, press [Enter] directly.

SHORT =NNNNNNNN2Y

5. Set Ton for the first step, if you want to load on 2S, press [2], and then

press [Enter] to confirm. Ton ranges from 0 to 60S.

SEQ01 ON =2S

6. Set Toff for the first step, if you want to load off 2S, press [2], and then

press [Enter] to confirm. Toff ranges from 0 to 60S.

SEQ01 OFF =2S

7. Set Tpf for the first step, if you want to delay 1S, press [1], and then press

[Enter] to confirm.

SEQ01 P/F =1S

8. Set Ton for the second step, if you want to load on 2S, press [2], and then

press [Enter] to confirm. Ton ranges from 0 to 60S.

SEQ02 ON =2S

9. Set Toff for the second step, if you want to load off 2S, press [2], and then

press [Enter] to confirm. Toff ranges from 0 to 60S.

SEQ02 OFF =2S

10. Set Tpf for the second step, if you want to delay 1S, press [1], and then

press [Enter] to confirm.

SEQ02 P/F =1S

11. Set the load voltage value and set it to 0 if not needed.

AUTO START= 0.500V

Automatic Test Function

Tpf is the delay time for a step.

12. Set stop conditions: COMP means stop test when all the steps are

completed, FAILURE means stop test when the testing fails. Press [Enter]

key to confirm.

STOP COMP FAILURE

13. Select the test file to link if you’d like to. The linked file must be saved

before. 0 stands for not linking to other files. Press [Enter] key to confirm.

CHAIN PROGRAM=0 (0-10)

Automatic test file and single step storage correspondence table

PROGRAM 1

Sequence

1

2

3

4

5

6

7

8

9

10

Save Group

1

2

3

4

5

6

7

8

9

10

PROGRAM 2

Sequence

1

2

3

4

5

6

7

8

9

10

Save Group

11

12

13

14

15

16

17

18

19

20

:

PROGRAM 10

Sequence

1

2

3

4

5

6

7

8

9

10

Save Group

91

92

93

94

95

96

97

98

99

100

14. Save the edited files in EEPROM, you can save up to 10 groups of files, e.g.

please press [1] to save the edited file in group 1, and then press [Enter] to

confirm.

SAVE PROGRAM =1 (1-10)

The above is the automatic test structure. The automatic test single step

specific settings also need to be edited separately, so the design is to

facilitate the modification of the single step settings.

10.0000V 0.0000A

0.00W I=1.000A

15. Select an operation mode and then press [Shift]+[CV] (Setup) to set

related parameters.

16. Edit the automatic test single step, details refer to below procedure.

After all the steps are set, press [Shift]+[4] (save) to save.

Set the steps of a test file in the example

In the above step 16, assume that the first step is edited to CC mode, current

2A, the upper limit voltage value is 10V, the lower limit voltage value is 2V; the

second step is edited to CV mode, voltage 3V, upper limit current value 5A,

lower limit current value 0A. Save in the automatic test file 2.

Automatic Test Function

The first step: CC mode, current 2A, the upper limit voltage value is 10V, and

the lower limit voltage value is 2V.

1. Press [CC], set the current to 2A, and then press [Shift]+[CV] (Setup) to

enter the setting interface.

RANGE=30.000A

CC

2. Set the maximum working current, and press [Enter] to confirm.

RANGE =2.000A

CC

3. Set the upper limit of voltage, press [Enter] to confirm.

HIGH=10.00V

CC

4. Set the lower limit of voltage, press [Enter] to confirm.

LOW=2.000V

CC

5. Set the rising slope of current, press [Enter] to confirm.

UP=1A/uS

CC

6. Set the descending slope of current, press [Enter] to confirm.

DOWN=1A/uS

CC

The parameter settings are complete.

10.0000V 0.000A

0.00W I=2.000A

7. Press [Shift] + [4] (Save) to enter the save settings interface. Press

numeric key [1] twice to save the current step as the first step of Program

2.

SAVE 11

The second step: CV mode, voltage 3V, the upper limit current value is 5A, and

the lower limit current value is 0A.

1. Press [CV], set the voltage to 3V, and then press [Shift]+[CV] (Setup) to

enter the setting interface.

RANGE=120.00V

2. Set the maximum working voltage, take 3V as example, and press [Enter]

to confirm.

RANGE=3.00V

3. Set the upper limit of current, press [Enter] to confirm.

HIGH=5.000A

4. Set the lower limit of current, press [Enter] to confirm.

LOW=0.0000A

The parameter settings are complete.

10.0000V 0.000A

0.00W V=3V

5. Press [Shift] + [4] (Save) to enter the save settings interface. Press

numeric keys [1] and [2] to save the current step as the second step of

Program 2.

Automatic Test Function

SAVE 12

Note

The single-step parameter storage position is related to the number of

automatic test file storage group and the number of steps. If it is saved in

the first group, the single-step parameter storage position is consistent with

the number of steps. If it is saved in the second group, the single-step

parameter storage position is 1 merges the number of steps, for example,

the single-step 1, 2, and 3 are stored in 11, 12, and 13 respectively; if they

are stored in the third group, the single-step parameter storage position is 2

merges the number of steps, for example, the single-step 1, 2, and 3 are

saved in 21, 22, and 23, and so on.

Set the steps in CR/CW mode

Set the automatic test step in CW mode:

1. Press [CW], set the power value, and then press [Shift]+[CV] (Setup) to

enter the setting interface.

RANGE=150.00W

2. Set the maximum working power, and press [Enter] to confirm.

RANGE =20.00W

3. Set the upper limit of voltage, press [Enter] to confirm.

HIGH=120.00V

4. Set the lower limit of voltage, press [Enter] to confirm.

LOW=0.000V

5. The parameter settings are complete.

10.0000V 0.000A

0.00W W=1.00W

Set the automatic test step in CR mode:

1. Press [CR], set the resistance value, and then press [Shift]+[CV] (Setup)

to enter the setting interface.

RANGE=7500.0Ω

2. Set the maximum working resistance, and press [Enter] to confirm.

RANGE =2000Ω

3. Set the upper limit of voltage, press [Enter] to confirm.

HIGH=120.00V

4. Set the lower limit of voltage, press [Enter] to confirm.

LOW=0.000V

5. The parameter settings are complete.

10.0000V 0.000A

0.00W R=2.000Ω

4.2.2 Test Mode for IT8500

1. Press [Shift] + [6] (Prog) to set the maximum current value and press

[Enter] to confirm.

MAX CURR=30.00A

Automatic Test Function

2. Set the maximum voltage value and press [Enter] to confirm.

MAX VOLT=120.00V

3. Set the maximum power value and press [Enter] to confirm.

MAX POWER=300.00W

4. Set the number of test steps, up to 10 steps, press [Enter] to confirm.

TEST STEP=10

5. Set the mode of the step, move the left and right cursors, when the mode

option flashes, it indicates that the mode is selected, press [Enter] to

confirm (such as select CC mode).

MODE CC CV CW CR

6. Set the current value and press [Enter] to confirm.

S01 CURR=**A

7. Set whether the step is short-circuited, move the left and right cursors to

select, and press [Enter] to confirm.

SHORT ON OFF

8. Set the type of value to be tested, move the left and right cursors to select,

and press [Enter] to confirm (such as selecting the value of the test as the

current value).

READBACK V A W

9. Set the upper limit current value and press [Enter] to confirm.

S01 MAX=**A

10. Set the lower limit current value and press [Enter] to confirm.

S01 MIN=**A

11. Set the delay time. That is, the test value is read after the input is set for a

certain period of time, and is used to test after the output is stable. The

delay range is 0.1~25 seconds.

S01 DELAY=**(S)

12. Repeat steps 5 through 11 to set the automatic test parameters for the next

steps.

13. Set the load voltage value. If no setting is required, set it to 0 and press

[Enter] to confirm.

START= **V

14. Set the test stop conditions. COMP means that the test stops after all tests

are completed, and FAILURE indicates that the test stops when an error

occurs.

STOP COMP FAILURE

15. Save the programmed file to EEPROM. You can save 50 groups of files. If

you want to put the edited file in the first group, press 1 and press [Enter]

to confirm.

SAVE PROGRAM =1 (1-50)

Note

In the process of editing the automatic test file, if an editing error

occurs, you can press the up arrow key to return to the previous step

to make changes without exiting the entire editing interface of the test

file.

Automatic Test Function

Set the power-on state to automatic test

1. Press [Shift] + [8] (System) to enter the system menu.

POWER-ON BUZZER

2. Press the right key to the RUNMODE, and press [Enter].

RUNMODE DEFAULT

3. Press the left or right key to select PROG_TEST and press [Enter], the

menu will return to RUNMODE.

RUN <PROG_TEST

4. Press [Esc] to exit.

P01

Note

To exit the automatic test mode, press [Shift] + [8] (System) to enter

the system menu and select RUNMODE as NORMAL.

Recall the test file to run

The following method can quickly recall the existing test file from the EEPROM

and test it after the instrument is powered on.

Operate in automatic test mode:

1. Press [Shift] + [Enter] (Recall).

0.0000V 0.000A

RECALL PROGRAM=1 (0~10)

2. Press the number keys to select the group and press [Enter].

0.0000V 0.000A

P01

3. If the start voltage (Start) is set to 0 during the editing process, press [Shift]

+ [.] (Trigger) to trigger.

If the start voltage (Start) is set to a non-zero value, connect the DUT to

start the test. The automatic test step will be displayed on the VFD and

FAULT or PASS will be displayed after the test is over.

0.0000V 0.000A

P01-01 2.100A

Note

Press [Shift] + [0] (Pause) to stop running the automatic test. Press

to continue testing.

Specifications

Chapter5 Specifications

Specifications

Model

IT8511+

Rated value

( 0~40 ℃)

Input voltage

0~120V

Input current

0~3A

0~30A

Input power

150W

Minimum

operation

value

0.14V at 3A

1.4V at 30A

CV mode

Range

0.1~18V

0.1~120V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.02%FS)

±(0.05%+0.025%FS)

CC mode

Range

0~3A

0~30A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

150W

Resolution

10mW

Accuracy

±(0.1%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling

slope *4

0.0001~0.2A/uS

0.001~1.5A/uS

Minimum rise

time *5

≒10uS

Measuring range

Readback

voltage

Range

0~18V

0~120V

Resolution

0.1 mV

1 mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~3A

0~30A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

150W

Resolution

10mW

Accuracy

±(0.1%+0.2%FS)

Protection range

OPP

Protection

≒160W

OCP

Protection

≒3.3A

≒33A

OVP

Protection

≒125V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒3.3/3A

≒33/30A

Specifications

Voltage( CV )

0V

Resistance( CR

)

≒45mΩ

Input

Impendance

150KΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8512+

Rated value

( 0~40 ℃)

Input voltage

0~120V

Input current

0~3A

0~30A

Input power

300W

Minimum

operation

value

0.12V at 3A

1.2V at 30A

CV mode

Range

0.1~18V

0.1~120V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.02%FS)

±(0.05%+0.025%FS)

CC mode

Range

0~3A

0~30A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

300W

Resolution

10mW

Accuracy

±(0.1%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling

slope *4

0.0001~0.2A/uS

0.001~1.5A/uS

Minimum rise

time *5

≒10uS

Measuring range

Readback

voltage

Range

0~18V

0~120V

Resolution

0.1 mV

1 mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~3A

0~30A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

300W

Resolution

10mW

Accuracy

±(0.1%+0.2%FS)

Protection range

OPP

Protection

≒320W

OCP

Protection

≒3.3A

≒33A

OVP

Protection

≒125V

Specifications

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒3.3/3A

≒33/30A

Voltage( CV )

0V

Resistance(

CR )

≒40mΩ

Input

Impendance

150KΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8511A+

IT8512A+

Rated value

( 0~40 ℃)

Input voltage

0~150V

Input current

0~3A

0~30A

0~3A

0~30A

Input power

150W

300W

Minimum

operation value

0.25V at 3A

2.5V at 30A

0.14V at 3A

1.4V at 30A

CV mode

Range

0.1~18V

0.1~150V

0.1~18V

0.1~150V

Resolution

1mV

10mV

1mV

10mV

Accuracy

±(0.05%+0.0

2%FS)

±(0.05%+0.025%FS)

±(0.05%+0.02%FS)

±(0.05%+0.025%F

S)

CC mode

Range

0~3A

0~30A

0~3A

0~30A

Resolution

0.1mA

1mA

0.1mA

1mA

Accuracy

±(0.05%+0.

05%FS)

±(0.05%+0.05%FS)

±(0.05%+0.05%

FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08

S *2

0.01%+0.0008S

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

150W

300W

Resolution

10mW

Accuracy

±( 0.1%+0.1%FS )

Dynamic mode( CC mode )

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling slope *4

0.0001~0.2

A/uS

0.001~1.5A/uS

0.0001~0.2A/uS

0.001~1.5A/uS

Minimum rise time *5

≒10uS

Measuring range

Readback

voltage

Range

0~18V

0~150V

0~18V

0~150V

Resolution

0.1 mV

1 mV

0.1 mV

1 mV

Accuracy

±(0.025%+0.

025%FS)

±(0.025%+0.025%FS)

±(0.025%+0.025%

FS)

Readback

current

Range

0~3A

0~30A

0~3A

0~30A

Resolution

0.1mA

1mA

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

150W

300W

Resolution

10mW

Accuracy

±(0.1%+0.1%FS)

Specifications

Protection range

OPP

Protection

≒160W

≒320W

OCP

Protection

≒3.3A

≒33A

≒3.3A

≒33A

OVP

Protection

≒160V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒3.3/3A

≒33/30A

≒3.3/3A

≒33/30A

Voltage( CV )

0V

Resistance( CR

)

≒80mΩ

≒40mΩ

Input

Impendance

150KΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8511B+

Rated value

( 0~40 ℃)

Input voltage

0~500V

Input current

0~3A

0~10A

Input power

150W

Minimum

operation

value

1.2V at 3A

4V at 10A

CV mode

Range

0.1~50V

0.1~500V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.05%FS)

CC mode

Range

0~3A

0~10A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.5Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

150W

Resolution

10mW

Accuracy

0.1%+0.2%FS

Dynamic mode

Dynamic

mode

CC mode

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling

slope *4

0.0001~0.2A/uS

0.001~0.8A/uS

Minimum rise

time *5

≒10uS

Measuring range

Readback

voltage

Range

0~50V

0~500V

Resolution

1 mV

10 mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~3A

0~10A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Specifications

Readback

power

Range

150W

Resolution

10mW

Accuracy

±(0.1%+0.2%FS)

Protection range

OPP

Protection

≒160W

OCP

Protection

≒3.3A

≒11A

OVP

Protection

≒530V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒3.3/3A

≒11/10A

Voltage( CV )

0V

Resistance( C

R )

≒400mΩ

Input

Impendance

1MΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8512B+

Rated value

( 0~40 ℃)

Input voltage

0~500V

Input current

0~3A

0~15A

Input power

300W

Minimum

operation

value

0.6V at 3A

3V at 15A

CV mode

Range

0.1~50V

0.1~500V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.05%FS)

CC mode

Range

0~3A

0~15A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.3Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

300W

Resolution

10mW

Accuracy

0.1%+0.2%FS

Dynamic mode

Dynamic

mode

CC mode

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling

slope *4

0.0001~0.2A/uS

0.001~0.8A/uS

Minimum rise

time *5

≒10uS

Measuring range

Readback

voltage

Range

0~50V

0~500V

Resolution

1 mV

10 mV

Specifications

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~3A

0~15A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

300W

Resolution

10mW

Accuracy

±(0.1%+0.2%FS)

Protection range

OPP

Protection

≒320W

OCP

Protection

≒3.3A

≒16A

OVP

Protection

≒530V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒3.3/3A

≒16/15A

Voltage( CV )

0V

Resistance(

CR )

≒180mΩ

Input

Impendance

1MΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8512C+

Rated value

( 0~40 ℃)

Input voltage

0~120V

Input current

0~6A

0~60A

Input power

300W

Minimum

operation

value

0.25V at 6A

2.5V at 60A

CV mode

Range

0.1~18V

0.1~120V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.02%FS)

±(0.05%+0.025%FS)

CC mode

Range

0~6A

0~60A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

±(0.05%+0.1%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

300W

Resolution

10mW

Accuracy

±(0.1%+0.3%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling

slope *4

0.0001~0.3A/uS

0.001~3A/uS

Specifications

Minimum rise

time *5

≒10uS

Measuring range

Readback

voltage

Range

0~18V

0~120V

Resolution

0.1 mV

1 mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~6A

0~60A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

±(0.05%+0.1%FS)

Readback

power

Range

300W

Resolution

10mW

Accuracy

±(0.1%+0.3%FS)

Protection range

OPP

Protection

≒320W

OCP

Protection

≒6.5A

≒65A

OVP

Protection

≒125V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒6.5/6A

≒65/60A

Voltage( CV )

0V

Resistance( C

R )

≒40mΩ

Input

Impendance

150KΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8512H+

Rated value

( 0~40 ℃)

Input voltage

0~800V

Input current

0~1A

0~5A

Input power

300W

Minimum

operation

value

1.4V at 1A

7V at 5A

CV mode

Range

0.1~80V

0.1~800V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.05%FS)

CC mode

Range

0~1A

0~5A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.1%FS)

±(0.05%+0.05%FS)

CR mode

*1

Range

2Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

300W

Resolution

10mW

Accuracy

0.2%+0.2%FS

Dynamic mode

Specifications

Dynamic

mode

CC mode

T1&T2

20uS~3600S /Res:1 uS

Accuracy

2uS±100ppm

Rising/Falling

slope *4

0.0001~0.04A/uS

0.001~0.2A/uS

Minimum rise

time *5

≒20uS

Measuring range

Readback

voltage

Range

0~80V

0~800V

Resolution

1 mV

10 mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~1A

0~5A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

300W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒320W

OCP

Protection

≒1.1A

≒5.5A

OVP

Protection

≒850V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒1.1/1A

≒5.5/5A

Voltage( CV )

0V

Resistance( C

R )

≒1.4Ω

Input

Impendance

2MΩ

Dimension

214.5mm*88.2mm*354.6mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8513A+

Rated value

( 0~40 ℃)

Input voltage

0~150V

Input current

0~6A

0~60A

Input power

400W

Minimum

operation

value

0.25V at 6A

2.5V at 60A

CV mode

Range

0.1~18V

0.1~150V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.02%FS)

±(0.05%+0.025%FS)

CC mode

Range

0~6A

0~60A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.1Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Specifications

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

400W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

100uS~3600S /Res:1 uS

Accuracy

10Us+100ppm

Rising/Falling

slope *4

0.001~0.15A/uS

0.01~1 A/uS

Minimum rise

time *5

≒50uS

≒60uS

Measuring range

Readback

voltage

Range

0~18V

0~150V

Resolution

0.1 mV

1mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~6A

0~60A

Resolution

0.1mA

1mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

400W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒420W

OCP

Protection

≒6.6A

≒66A

OVP

Protection

≒165V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒6.6/6A

≒66/60A

Voltage( CV )

≒0V

Resistance( C

R )

≒30mΩ

Input

Impendance

≒280KΩ

Dimension

214.5mm*88.2mm*453.5mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8513B+

Rated value

( 0~40 ℃)

Input voltage

0~500V

Input current

0~3A

0~30A

Input power

600W

Minimum

operation

value

0.3V at 3A

3V at 30A

CV mode

Range

0.1~50V

0.1~500V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.05%FS)

CC mode

Range

0~3A

0~30A

Specifications

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.02%+0.08S *2

0.02%+0.0008S

CP mode

*3

Range

600W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

100uS~3600S /Res:1 uS

Accuracy

10uS±100ppm

Rising/Falling

slope *4

0.001~0.05A/uS

0.01~0.5A/uS

Minimum rise

time *5

≒60uS

Measuring range

Readback

voltage

Range

0~50V

0~500V

Resolution

1 mV

10mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~3A

0~30A

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

600W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒650W

OCP

Protection

≒3.3A

≒33A

OVP

Protection

≒530V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒3.4/3A

≒34/30A

Voltage( CV )

0V

Resistance( C

R )

≒100mΩ

Input

Impendanc

e

1MΩ

Weight

436.5mm*88.2mm*463.5mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.02%+0.08),1/(1/R-(1/R)*0.02%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum

current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8513C+

Rated value

( 0~40 ℃)

Input voltage

0~120V

Input current

0~12A

0~120A

Input power

600W

Specifications

Minimum

operation

value

0.2V at 12A

2V at 120A

CV mode

Range

0.1~18V

0.1~120V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.02%FS)

±(0.05%+0.025%FS)

CC mode

Range

0~12A

0~120A

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

±(0.05%+0.1%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.01%+0.08S *2

0.01%+0.0008S

CP mode

*3

Range

600W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

100uS~3600S /Res:1 uS

Accuracy

10uS±100ppm

Rising/Falling

slope *4

0.001~0.2A/uS

0.01~1.6A/uS

Minimum rise

time *5

≒60uS

Measuring range

Readback

voltage

Range

0~18V

0~120V

Resolution

0.1 mV

1mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~12A

0~120A

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

±(0.05%+0.1%FS)

Readback

power

Range

600W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒620W

OCP

Protection

≒13A

≒130A

OVP

Protection

≒125V

OTP

Protection

≒95℃

Specification

Short

Current( CC )

≒13/12A

≒130/120A

Voltage( CV )

0V

Resistance( CR

)

≒15mΩ

Input

Impendance

150KΩ

Weight

7.1KG

Dimension

214.5mm*88.2mm*453.5mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

Specifications

*5 Minimum rise time: 10%-90% current rise time

Model

IT8514C+

Rated value

( 0~40 ℃)

Input voltage

0~120V

Input current

0~24A

0~240A

Input power

1500W

Minimum

operation

value

0.25V at 24A

2.5V at 240A

CV mode

Range

0.1~18V

0.1~120V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.02%FS)

±(0.05%+0.025%FS)

CC mode

Range

0~24A

0~240A

Resolution

1mA

10mA

Accuracy

±(0.1%+0.1%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.02%+0.08S *2

0.02%+0.0008S

CP mode

*3

Range

1500W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Dynamic mode

CC mode

T1&T2

100uS~3600S /Res:1 uS

Accuracy

10uS±100ppm

Rising/Falling slope *4

0.001~0.3A/uS

0.01~3.2A/uS

Minimum rise time *5

≒60uS

Measuring range

Readback

voltage

Range

0~18V

0~120V

Resolution

0.1 mV

1mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~24A

0~240A

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

1500W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒1550W

OCP

Protection

≒26.7A

≒267A

OVP

Protection

≒125V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒26.7/24A

≒267/240A

Voltage( CV )

0V

Resistance( CR

)

≒8mΩ

Input

Impendance

150KΩ

Dimension

436.5mm*88.2mm*463.5mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.02%+0.08),1/(1/R-(1/R)*0.02%-0.08))

Specifications

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8514B+

Rated value

( 0~40 ℃)

Input voltage

0~500V

Input current

0~6A

0~60A

Input power

1500W

Minimum

operation

value

0.3V at 6A

3V at 60A

CV mode

Range

0.1~50V

0.1~500V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.05%FS)

CC mode

Range

0~6A

0~60A

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.02%+0.08S *2

0.02%+0.0008S

CP mode

*3

Range

1500W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

100uS~3600S /Res:1 uS

Accuracy

10uS±100ppm

Rising/Falling

slope *4

0.001~0.15A/uS

0.01~0.8A/uS

Minimum rise

time *5

≒60uS

Measuring range

Readback

voltage

Range

0~50V

0~500V

Resolution

0.1 mV

1mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~6A

0~60A

Resolution

1mA

10mA

Accuracy

±(0.05%+0.05%FS)

Readback

power

Range

1500W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒1550W

OCP

Protection

≒6.7A

≒67A

OVP

Protection

≒530V

OTP

Protection

≒85℃

Specification

Short

Current( CC )

≒6.7/6A

≒67/60A

Voltage( CV )

0V

Resistance( C

R )

≒50mΩ

Specifications

Input

Impendance

1MΩ

Dimension

436.5mm*88.2mm*463.5mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.02%+0.08),1/(1/R-(1/R)*0.02%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

Model

IT8516C+

Rated value

( 0~40 ℃)

Input voltage

0~120V

Input current

0~24A

0~240A

Input power

3000W

Minimum

operation

value

0.15V at 24A

1.5V at 240A

CV mode

Range

0.1~18V

0.1~120V

Resolution

1mV

10mV

Accuracy

±(0.05%+0.025%FS)

CC mode

Range

0~24A

0~240A

Resolution

1mA

10mA

Accuracy

±(0.1%+0.1%FS)

CR mode

*1

Range

0.05Ω~10Ω

10Ω~7.5KΩ

Resolution

16bit

Accuracy

0.02%+0.08S *2

0.02%+0.0008S

CP mode

*3

Range

3000W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Dynamic mode

Dynamic

mode

CC mode

T1&T2

120uS~3600S /Res:1 uS

Accuracy

10uS+100ppm

Rising/Falling

slope *4

0.001~0.25A/uS

0.01~2.5A/uS

Minimum rise

time *5

≒70uS

Measuring range

Readback

voltage

Range

0~18V

0~120V

Resolution

0.1 mV

1mV

Accuracy

±(0.025%+0.025%FS)

Readback

current

Range

0~24A

0~240A

Resolution

1mA

10mA

Accuracy

±(0.1%+0.1%FS)

Readback

power

Range

3000W

Resolution

10mW

Accuracy

±(0.2%+0.2%FS)

Protection range

OPP

Protection

≒3000W

OCP

Protection

≒26A

≒260A

OVP

Protection

≒125V

OTP

Protection

≒85℃

Specification

Specifications

Short

Current( CC )

≒26/24A

≒260/240A

Voltage( CV )

0V

Resistance(

CR )

≒6mΩ

Input

Impendance

≒300KΩ

Dimension

436.5mm*176mm*463.5mm

*1 The voltage/current input is no less than 10% FS

*2 The scope of read-back resistance is: (1/(1/R+(1/R)*0.02%+0.08),1/(1/R-(1/R)*0.02%-0.08))

*3 The voltage/current input is no less than 10% FS

*4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current.

*5 Minimum rise time: 10%-90% current rise time

* The above specifications may be subject to change without prior notice.

Supplementary Characteristics

 Memory capacity: 100 registers

Suggested calibration frequency: Once a year

 AC input level (A transfer switch is selectable on the rear panel)

Option Opt.1: 220V ±10% 50Hz/60Hz

Option Opt.2: 110V ±10% 50Hz/60Hz

 Cooling type

Intelligent fans

 Fans working principle:

Fans running speed is determined by radiator temperature.When

temperature reaches 40℃,fans start to work and intelligently adjust its

speed with temperature variation.

Communication Interfaces

Chapter6 Communication Interfaces

6.1 Communication Modules Introduction

DB9 in the rear panel of the DC load IT8511+/IT8511A+/IT8511B+/IT8512+

/IT8512A+/IT8512B+/IT8512C+/IT8512H+/IT8513A+/IT8513C+ is TTL level,

which can be connected to the serial port of the PC through the level

conversion of the accessory.

The communication module is IT-E121/IT-E121A/IT-E122/IT-E123.

The IT8513B+/IT8514B+/IT8514C+/IT8516C+ comes standard with RS232

and USB communication interfaces.

Please do not connect the standard RS232 cable to the

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C

+/IT8512H+/IT8513A+/IT8513C+ electronic load, which may

damage the instrument.

IT-E121 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level; you can use the communication module IT-E121 and a standard RS232

extension cable to connect the DB9 interface connector of the DC load and the

RS-232 interface connector of computer for the communication.

IT-E121A Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level; you can use the communication module IT-E121A and a standard RS232

extension cable to connect the DB9 interface connector of the DC load and the

RS-232 interface connector of computer for the communication.

IT-E121A is derived on the basis of IT-E121, the main difference between them

is that the DB9 interface connector of the RS232 changes from female to male,

so that can be directly connected to the standard LAN interface.

IT-E121A communication cable

Communication Interfaces

IT-E122 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level; IT-E122 has a USB interface (male connector B) on one end, you can use

IT-E122 and a standard USB extension cable (type B female connector at one

end and type A at one end) to connect the DB9 interface connector of the DC

load and the USB interface connector of computer for the communication.

After connecting the load and computer by USB, you need to install IT-E122

driver (download from

http://www.itech.sh/support/Down-3.htm?model=IT-E122%20%E5%85%89%E

9%9A%94%E7%A6%BB%E9%80%9A%E8%AE%AF%E6%8E%A5%E5%8F

%A3%E9%A9%B1%E5%8A%A8 or contact ITECH agent). The device

manager of PC will display ‘Prolific USB-to-Serial COM Port’ after installing.

IT-E123 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level;

The interface on both side port of IT-E123 are DB9 interface and RS485

interface, you can use the communication module IT-E123 and an a standard

RS485-RS232 conversion cable to connect the DB9 interface connector of the

DC load and the RS-232 interface connector of computer for the

communication.

Communication Interfaces

RS485 pins

6.2 Communication with PC

Before using the remote operation mode, please make sure that the baud rate

and communication address in the DC load are the same as in the computer

software, otherwise, the communication will fail, you can change the baud rate

and communication address from the front panel or from computer.

DB9 Serial Port

In order for the computer to communicate with the DC load, both must be set to

the same RS-232 settings. These communication settings are:

1. Baud rate: 4800,9600,19200 and 38400 are selectable, default setting is

9600.

2. Data bit: 8 bit

3. Stop bit: 1

4. Parity: None

5. Address: the range is from 0 to 31, default setting is 0

Start Bit

8 Data Bits

Parity=None

Stop Bit

RS-232

IT8513B+/IT8514B+/IT8514C+/IT8516C+ electronic load has a DB9 interface

on rear panel. Connect E-load and computer by cable of COM ends (DB9).

Composite key [Shift] + [8] on front board can be used to enter system menu

for activation.

Communication Interfaces

 RS-232 Interface

In RS-232 interface, all SCPI commands can be used for programming. If

RS-232 interface is selected, in accordance with internal connection of data

terminal equipment (DTE) and data communication equipment (DCE) as

defined in EIA RS-232, the load is connected to another DTE (e.g., PC COM

interface) with direct-connected Modem cable.

RS232 Pins of Plug

Base Pin

Number

Description

1

No conjunction

2

TXD, data transmission

3

RXD, data receiving

4

No conjunction

5

GND, grounding

6

No conjunction

7

CTS, clear to send

8

RTS, request to send

9

No conjunction

 Communication Setup

Please ensure the PC and the load have the same configuration in the following

items.

Baudrate: 9600(4800, 9600, 19200, 38400). You could enter the system menu

to set the baudrate.

Data bit: 8

Stop bit: 1

Parity bit: (none, even, odd)

EVEN 8 data bits have even parity

ODD 8 data bits have odd parity

NONE 8 data bits have no parity

Native machine address: (0 ~31, factory default is 0)

Start Bit

8 Data Bits

Parity=None

Stop Bit

USB Interface

Connect the load and the computer using a cable with two USB interfaces

(each end). All functions of the load can be programmed via USB.

After connecting the load and computer by USB, you need to install IT-E122

driver (download from

http://www.itech.sh/support/Down-3.htm?model=IT-E122%20%E5%85%89%E

9%9A%94%E7%A6%BB%E9%80%9A%E8%AE%AF%E6%8E%A5%E5%8F

%A3%E9%A9%B1%E5%8A%A8 or contact ITECH agent). The device

manager of PC will display ‘Prolific USB-to-Serial COM Port’ after installing.

Notes: Only IT8513B+/IT8514B+/IT8514C+/IT8516C+ models have the USB

communication interface. After the driver is installed successfully, use USB line

to connect in communication. (Please don’t connect DB9 interface at the same

time). Don’t need to set the menu.

Appendix

Specifications of Red and Black Test Lines

ITECH provides you with optional red and black test lines, which individual

sales and you can select for test. For specifications of ITECH test lines and

maximum current values, refer to the table below.

Model

Specification

Cross Section

Length

IT-E301/10A

10A

-

1m

IT-E301/30A

30A

6mm

2

1.2m

IT-E301/30A

30A

6mm

2

2m

IT-E301/60A

60A

20mm

2

1.5m

IT-E301/120A

120A

50mm

2

2m

IT-E301/240A

240A

70mm

2

1m

IT-E301/240A

240A

70mm

2

2m

IT-E301/360A

360A

95mm

2

2m

For maximum current of AWG copper wire, refer to table blow.

AWG

10

12

14

16

18

20

22

24

26

28

The

Maximum

Current

Value( A)

40

25

20

13

10

7

5

3.5

2.5

1.7

Note: AWG ( American Wire Gage), it means X wire ( marked on the wire). The

table above lists current capacity of single wire at working temperature of 30°C.

For reference only.

Contact Us

Thanks for purchasing ITECH products. In case of any doubts, please contact us as follows:

1. Refer to accompanying data disk and relevant manual.

2. Visit ITECH website: www.itechate.com.

3. Select the most convenient contact method for further information.

ITECH IT8512H-PLUS 800V 5A Programmable DC Electronic Load

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Manual

Specifications

ITECH IT8512H-PLUS Questions and Answers