ITECH IT-M7721 IT-M7700 Series High Performance User Manual

Programmable AC Power

Source

IT-M7700 Series User Manual

Model: IT-M7700 Series

Version: V1.1/5,2020

Notices

Ltd. 2020

No part of this manual

may be reproduced in any

form or by any means (in-

cluding electronic storage

and retrieval or translation

into a foreign language)

without prior permission

and written consent from

Itech Electronic, Co., Ltd.

as governed by interna-

tional copyright laws.

Manual Part Number

Warranty

The materials contained in this docu-

ment are provided “as is”, and is sub-

ject to change, without prior notice, in

future editions. Further, to the maxi-

mum extent permitted by applicable

laws, ITECH disclaims all warrants, ei-

ther express or implied, with regard to

this manual and any information con-

tained herein, including but not limited

to the implied warranties of merchant-

ability and fitness for a particular pur-

pose. ITECH shall not be held liable

for errors or for incidental or indirect

Safety Notices

A CAUTION sign denotes

a hazard. It calls attention

to an operating procedure

or practice that, if not cor-

rectly performed or ad-

hered to, could result in

damage to the product or

loss of important data. Do

not proceed beyond a

CAUTION sign until the in-

dicated conditions are

fully understood and met.

damages in connection with the fur-

nishing, use or application of this

document or of any information con-

Trademarks

Pentium is U.S. registered

trademarks of Intel

Corporation.

Microsoft, Visual Studio,

Windows and MS Win-

dows are registered

trademarks of Microsoft

Corporation in the United

States and/or other coun-

tries and regions.

tained herein. Should ITECH and the

user enter into a separate written

agreement with warranty terms cover-

ing 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 de-

scribed herein are furnished under a li-

cense 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 author-

ized to the U.S. Government only in-

clude 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 commer-

cial computer software or computer

software documents) while providing

the customized business licenses of

software and technical data.

A WARNING sign denotes

a hazard. It calls attention

to an operating procedure

or practice that, if not cor-

rectly performed or ad-

hered to, could result in

personal injury or death.

Do not proceed beyond a

WARNING sign until the

indicated conditions are

fully understood and met.

A NOTE sign denotes im-

portant hint. It calls atten-

tion to tips or

supplementary informa-

tion that is essential for

users to refer to.

IT-M7700 Series User Manual

Quality Certification and Assurance

We certify that series instrument 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 work-

manship 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 PRE-

PAID. 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 prod-

ucts under designated environment;

•

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

legible by customer;

•

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

ture, fire, improper use or negligence.

IT-M7700 Series User Manual

Safety Symbols

Direct current

ON ( power)

Alternating

current

OFF ( power)

Both direct and

alternating

current

Power-on state

Chassis (earth

ground) symbol.

Power-off state

Earth ( ground)

terminal

Reference

terminal

Caution

Positive terminal

Warning ( refer to

this manual for

specific Warning

or Caution

information)

Negative terminal

A chassis

terminal

Safety Precautions

The following safety precautions must be observed during all phases of opera-

tion of this instrument. Failure to comply with these precautions or specific warn-

ings elsewhere in this manual will constitute a default under safety standards of

design, manufacture and intended use of the instrument. ITECH assumes no li-

ability for the customer’s failure to comply with these precautions.

III

IT-M7700 Series User Manual

•

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 instrument is provided with a power cord during delivery and

should be connected to a socket with a protective earth terminal, a

junction box or a three-phase distribution box. Before operation, be

sure that the instrument is well grounded.

•

Please always use the provided cable to connect the instrument.

•

Check all marks on the instrument before connecting the instru-

ment to power supply.

•

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

the working voltage range in order to reduce risks of fire and elec-

tric shock.

•

Do not install alternative parts on the instrument or perform any un-

authorized 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.

IT-M7700 Series User Manual

•

SHOCK HAZARD Ground the Instrument. This product is provided

with a protective earth terminal. To minimize shock hazard, the in-

strument must be connected to the AC mains through a grounded

power cable, with the ground wire firmly connected to an electrical

ground (safety ground) at the power outlet or distribution box. Any

interruption of the protective (grounding) conductor or disconnec-

tion of the protective earth terminal will cause a potential shock

hazard that could result in injury or death.

•

Before applying power, verify that all safety precautions are taken.

All connections must be made with the instrument turned off, and

must be performed by qualified personnel who are aware of the

hazards involved. Improper actions can cause fatal injury as well as

equipment damage.

•

SHOCK HAZARD, LETHAL VOLTAGES This product can output the

dangerous voltage that can cause personal injury, and the operator

must always be protected from electric shock. Ensure that the out-

put electrodes are either insulated or covered using the safety cov-

ers provided, so that no accidental contact with lethal voltages can

occur.

•

Never touch cables or connections immediately after turning off the

instrument. Verify that there is no dangerous voltage on the electro-

des or sense terminals before touching them.

•

After using the device, turn off the power switch of the device be-

fore unplugging the power cord or disassembling the terminals. Do

not touch the cable or the terminal immediately. Depending on the

model, the dangerous voltage at the plug or terminal is maintained

for 10 seconds after the device is switched off. Make sure that there

is no dangerous voltage before touching them.

•

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.

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.

IT-M7700 Series User Manual

Environmental Conditions Requirements

Operating temperature 0 40

Operating humidity 20% 80% (non-condensation)

Storage temperature -20 70

Altitude Operating up to 2,000 meters

Installation category II

Pollution degree Pollution degree 2

In order to ensure the accuracy of measurement, it is recommended to oper-

ate the instrument half an hour after start-up.

Regulation Tag

The CE tag shows that the product

complies with the provisions of all rel-

evant European laws (if the year is

shown, it indicates that the year when

the design is approved).

This instrument complies with the

WEEE directive (2002/96/EC) tag re-

quirements. This attached product

tag shows that the electrical/elec-

tronic product cannot be discarded in

household waste.

This symbol indicates that no danger

will happen or toxic substances will

not leak or cause damage in normal

use within the specified period. The

service life of the product is 10 years.

The product can be used safely within

the environmental protection period;

otherwise, the product should be put

into the recycling system.

IT-M7700 Series User Manual

Waste Electrical and Electronic Equipment

(WEEE) Directive

Waste electrical and electronic equip-

ment (WEEE) directive, 2002/96/EC

The product complies with tag re-

quirements of the WEEE directive

(2002/96/EC). This tag indicates that

the electronic equipment cannot be

disposed of as ordinary household

waste. Product Category

According to the equipment classifi-

cation in Annex I of the WEEE direc-

tive, this instrument belongs to the

“Monitoring” product.

If you want to return the unnecessary

instrument, please contact the near-

est sales office of ITECH.

VII

IT-M7700 Series 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 11:2015+A1:2016 Ed 6.1

IEC 61000-3-2: 2018 RLV

IEC 61000-3-3: 2013+A1:2017

IEC 61000-4-2:2008

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

IEC 61000-4-4:2012

IEC 61000-4-5:2014+A1:2017

IEC 61000-4-6:2013+cor1:2015

IEC 61000-4-11:2004+A1:2017

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

product in residential/domestic environments may cause electromagnetic interference.

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

limit.

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

listed above.

Safety Standard

IEC 61010-1:2010+A1:2016

Copyright © Itech Electronic Co., Ltd. 
VIII 
IT-M7700 Series User Manual 
 
 
 
 
 
Content 
Quality Certification and Assurance ............................................................................... I 
Warranty ........................................................................................................................ I 
Limitation of Warranty .................................................................................................... I 
Safety Symbols ............................................................................................................. II 
Safety Precautions. ....................................................................................................... II 
Environmental Conditions. .......................................................................................... IV 
Regulation Tag ............................................................................................................ V 
Waste Electrical and Electronic Equipment (WEEE) Directive ..................................... VI 
Compliance Information ............................................................................................. VII 
1 
Quick Reference ............................................................................................................. 1 
1.1 
Brief Introduction .................................................................................................. 1 
1.2 
Front Panel at a Glance ........................................................................................ 2 
1.3 
Front Panel Keys at a Glance ............................................................................... 3 
1.4 
Rear Panel at a Glance ......................................................................................... 5 
1.5 
Front Panel Display at a Glance ............................................................................ 6 
1.6 
Configuration Menu at a Glance ............................................................................ 9 
1.7 
System Menu at a Glance ................................................................................... 10 
1.8 
Optional Accessories .......................................................................................... 14 
2 
Inspection and Installation ............................................................................................ 16 
2.1 
Verifying the Shipment ........................................................................................ 16 
2.2 
Instrument Size Introduction ............................................................................... 17 
2.3 
Rack Mounting ................................................................................................... 17 
2.4 
Connecting the Power Cord ................................................................................ 18 
2.5 
Connecting the Device Under Test (DUT) ........................................................... 20 
2.6 
Connecting the Interface ..................................................................................... 22 
2.6.1 
USB Interface ........................................................................................... 23 
2.6.2 
GPIB Interface .......................................................................................... 24 
2.6.3 
LAN Interface ........................................................................................... 25 
2.6.4 
RS-232 Interface ...................................................................................... 31 
2.6.5 
CAN Interface ........................................................................................... 33 
3 
Getting Started ............................................................................................................. 35 
3.1 
Power-on the Instrument .................................................................................... 35 
3.2 
Applying DC Output ............................................................................................ 37 
3.3 
Applying Waveform Output ................................................................................. 38 
4 
Operation and Application ............................................................................................ 41 
4.1 
Select the Output Mode ...................................................................................... 41 
4.2 
Set the AC Output ............................................................................................... 42 
4.2.1 
Set the AC Voltage ................................................................................... 42 
4.2.2 
Set the AC Frequency ............................................................................... 43 
4.2.3 
Set the AC Phase Angle ........................................................................... 43 
4.2.4 
Select the Output Waveform ..................................................................... 44 
4.3 
Set the DC Output .............................................................................................. 45 
4.3.1 
Set the DC Voltage ................................................................................... 45 
4.3.2 
Set the DC Voltage Rise Time .................................................................. 45 
4.4 
Set the Over-current Protection Point ................................................................. 46 
4.5 
Turning the Output On and Off ............................................................................ 47 
4.6 
Executing Measurement ..................................................................................... 47 
4.6.1 
Measurement Functions ........................................................................... 47 
4.7 
Function Operation ............................................................................................. 48 
4.7.1 
List Function ............................................................................................. 48 
4.7.2 
Dimmer Function ...................................................................................... 50 
4.7.3 
Surge/Trap Function ................................................................................. 51 
4.8 
Protection Function ............................................................................................. 53 
4.8.1 
Set the Over-Voltage Protection (rms) ...................................................... 53 
4.8.2 
Set the Over-Voltage Protection (peak) ..................................................... 54 

Copyright © Itech Electronic Co., Ltd. 
IX 
IT-M7700 Series User Manual 
 
 
4.8.3 
Set the Under-Voltage Protection (rms) .................................................... 55 
4.8.4 
Set the Over-Current Protection (rms) ....................................................... 56 
4.8.5 
Set the Over-Current Protection (peak) ..................................................... 57 
4.8.6 
Set the Over-Power Protection ................................................................. 58 
4.8.7 
Set the Current Limiting Protection ........................................................... 59 
4.8.8 
Set the Sense Check Protection ............................................................... 59 
4.8.9 
Limiting the Setting Value Range .............................................................. 60 
4.9 
System-Related Operations. ............................................................................... 60 
4.9.1 
Switch Local/Remote Mode ...................................................................... 60 
4.9.2 
Save and Recall Operations ..................................................................... 61 
4.9.3 
Key Lock Function .................................................................................... 61 
4.9.4 
Set the Beeper Status ............................................................................... 62 
4.9.5 
Set the Power-on State ............................................................................. 62 
4.9.6 
Restore the as-shipped settings ................................................................ 63 
4.9.7 
View the System Information .................................................................... 65 
4.9.8 
Set the Relay Control. ............................................................................... 66 
4.10 
External Analog Quantity Function (Option) ...................................................... 66 
4.10.1 
Definition of Analog Interface .................................................................. 66 
4.10.2 
Enable/Disable Analog Control ............................................................... 69 
4.10.3 
Analog Quantity Control .......................................................................... 70 
5 
Multi-units operation ..................................................................................................... 75 
5.1 
Series Operation ................................................................................................ 75 
5.2 
Three-phase Operation....................................................................................... 78 
6 
Routine Maintenance .................................................................................................... 83 
6.1 
Instrument Self-Test. .......................................................................................... 83 
6.2 
Cleaning and Maintenance ................................................................................. 83 
6.3 
Prompt Information Reference ............................................................................ 84 
6.4 
Contact of ITECH Engineers ............................................................................... 85 
6.5 
Return for Repair. ............................................................................................... 87 
7 
Technical Specification ................................................................................................. 88 
7.1  IT-M7721 ............................................................................................................ 88 
7.2  IT-M7721L .......................................................................................................... 90 
7.3  IT-M7722 ............................................................................................................ 92 
7.4  IT-M7722L .......................................................................................................... 94 
A 
Appendix ...................................................................................................................... 97 
A.1 
Specifications of Red and Black Test Lines ........................................................ 97 
A.2 
Built -in Waveforms ............................................................................................ 98 

Quick Reference

1 Quick Reference

This chapter briefly introduces the front panel, rear panel, keyboard button func-

tions and front panel display functions of this series instrument to ensure a quick

understanding of the appearance, structure and key usage features of the in-

strument before operating the instrument. This chapter does not introduces

each operating characteristics in detail. It is just a quick reference guide to help

you quickly learn the operating characteristics of the instrument.

Brief Introduction

Front Panel at a Glance

Front Panel Keys at a Glance

Rear Panel at a Glance

Front Panel Display at a Glance

Configuration Menu at a Glance

System Menu at a Glance

Optional Accessories

1.1

Brief Introduction

ITECH newly-launched IT-M7700 High Performance Programmable AC Power

Supply combines intelligence and flexibility, breaks through the huge defects of

the traditional AC power source, reduces the size to only 1⁄2 1U, maximizes

space utilization. Built-in power meter and arbitrary waveform generator make it

convenient to simulate various arbitrary waveform outputs. IT-M7700 is de-

signed with advanced technologies of programmable AC and DC power sup-

plies, and can be widely used in multiple fields such as power energy products,

home appliances, industrial electronics, avionics, military and IEC standards

testing.

Features:

•

1⁄2 1U compact design, increased space utilization

•

AC, DC, AC + DC output modes, DC voltage offset simulation in AC + DC

mode

•

Built-in AC power meter with powerful functions

•

Built-in abundant waveform database, including 30 harmonic distortion

waveforms *1

•

List mode, simulate civil AC working condition, realize instantaneous power

interruption simulation function *1*2

•

Arbitrary waveform output function, user can customize waveforms *1

•

Harmonic analysis function *1

Quick Reference

•

Harmonic simulation function *1

•

Surge/Trap function *1

•

Front and rear edge Dimmer phase dimming function Settable output wave-

form start/stop phase angle *1

•

Settable output waveform start/stop phase angle

•

Higher voltage available by two units in series connection *1*3

•

Three phase output available by three units Y-type external

connections *1*3

•

Optional interfaces include RS232, CAN, LAN, GPIB, USB_TMC,USB_

VCP, external analog, IO. Flexible and cost effective

•

With professional software, set up programs comply with multinational se-

curity regulations and test conditions, to complete military, civil aviation elec-

tronics and IEC related standards testing *1*4

*1 IT-M7721L/IT-M7722L do not support this function.

*2 Realize by PC software.

*3 IT-M7723/IT-M7724 do not support this function.

*4 Coming soon

Model Selection Table for IT-M7700 Series:

Model

Power(AC/DC)

Voltage

Current

Frequency

Height

IT-M7721

300 VA/300 W

300 V

3 A

45~1000 Hz

1/2 1U

IT-M7721L

300 VA/300 W

300 V

3 A

45~100 Hz

1/2 1U

IT-M7722

600 VA/600 W

300 V

45~1000 Hz

1/2 1U

IT-M7722L

600 VA/600 W

300 V

45~100 Hz

1/2 1U

1.2

Front Panel at a Glance

The front panel of this series instruments is shown below.

Quick Reference

[Shift]key Composite key, combined with other keys to realize

functions marked above keys.

[Link]

(Local)

key

The functions is described as follows.

•

[Link] key. When the instrument is connected to

the PC through the LAN interface, this key will

light up.

•

Local switch key. In remote control, press

[Shift] + [Link] (Local) keys to switch the instru-

ment to local control mode.

Power switch

Turns the instrument on or off.

Vacuum fluo-

Displays all instrument functions. The information

rescent display

changes based on selected function.

Function keys

Please refer to 1.3 Front Panel Keys at a Glance for

group

detailed description about the function keys.

Push button

rotary

The functions is described as follows.

•

Rotate the push button rotary to adjust the value

setting or scroll pages to view menu items. Ro-

tate the push button rotary clockwise to increase

the set value and anticlockwise to decrease the

set value

7 The left/right

navigation keys

and composite

keys

•

Pressing the push button rotary acts like press-

ing [Enter] key to confirm an operation.

The functions is described as follows.

•

The left and right navigation keys are used to

adjust the cursor to the specified position or

scrolls pages to view menu items.

•

Save/Recall the present settings.

1.3

Front Panel Keys at a Glance

The keys introduction of IT-M7700 series power source is shown as follows.

No. Name Description

Quick Reference

Key Name Description

Table 1–1 Keys Description

[Select] • AC Mode: Switches the AC main interface. Use this

key to switch the AC main interface 1 and AC main in-

terface 2.

•

DC Mode: [Select] key is not available.

[V-set] Sets the output voltage value.

[I-set] Sets the OCPrms value.

[AC] Press the [AC] key to set the instrument to AC output

mode.

[DC] Press the [DC] key to set the instrument to DC output

mode.

[F-set] • AC Mode: Sets the frequency value.

•

DC Mode: [F-set] key is not available.

[On/Off] Turns the instrument output on or off. When lit, indicates

that the output is on.

[Esc] Press this key to exit the current operation interface.

[Enter] Selects the menu item or confirm an operation.

The left and right navigation keys are used to adjust the

cursor to the specified position or scrolls pages to view

menu items.

Display is only used to prompt that the [Select] key is the display switch key

of the AC main interface, and has no other functions.

Quick Reference

Key Name Description

Composite key [Shift], combined with other keys to realize functions marked

above keys. The detailed functions are listed as follows.

Table 1–2 Composite keys Description

[Shift]+[V-set](Config) Enter the Config menu.

[Shift]+[I-set](Function) Enter the Function menu.

[Shift]+[DC](System) Enter the System menu.

[Shift]+[F-set](Protect) Enter the Protect menu.

[Shift]+[On/Off]

(Trigger)

Generate a local trigger signal.

[Shift]+[Enter](lock) Turn the keyboard lock on or off.

[Shift]+

(Save)

Saves the present settings.

[Shift]+

(Recall)

Returns the instrument to the specified setup.

1.4

Rear Panel at a Glance

The rear panel of this series instruments is shown below.

No.

Name

Description

Output terminals

AC or DC output terminals and chassis ground ter-

minals, used to connect DUT.

System bus

interfaces

Used for communication between instruments in

three phase or series operation feature.

Extended option-

al interface

Optional interfaces: (Plastic plugs are inserted by

default when the user does not purchase the

interface.)

Quick Reference

Remote sense

terminals, Output

lock terminals

and I/O terminals

•

USB and LAN interfaces;

•

GPIB interface;

•

RS-232 and CAN interfaces;

•

Analog interface.

The descriptions of each terminals are as follows.

•

SL+ and SN- are remote sense terminals, used

for maximizing measurement accuracy.

•

L+ and N- are output terminals. These two ter-

minals are not suitable for transmitting large

current. Therefore, they cannot be connected

to the DUT, which are only used for short circuit

during local measurement.

•

I/O function has not yet fully supported.

Ground screw Ground screw for making chassis ground

connections.

AC power input

socket

Used to connect AC power to start instrument,

supports 110 V or 220 V.

1.5

Front Panel Display at a Glance

The IT-M7700 series power supply has different display information under the

AC mode and the DC mode. Details are as follows.

•

Under the AC mode, the AC main interface 1 is displayed as follows:

No. Name Description

Quick Reference

Vac set value

/Vrms meter

value

OCPrms set

value

/Irms meter

value

Freq set value

/Freq meter

value

•

When output is Off, the AC voltage setting

value is displayed.

•

When output is On, the Meter value of volt-

age effective value is displayed.

•

When output is Off, the OCPrms setting val-

ue is displayed.

•

When output is On, the Meter value of cur-

rent effective value is displayed.

•

When output is Off, the frequency setting val-

ue is displayed.

•

When output is On, the Meter value of fre-

quency value is displayed.

P meter value Displays the Meter value of the active power.

Ip meter value Displays the Meter value of the maximum cur-

rent peak value.

PF meter value Displays the Meter value of the power factor.

•

Under the AC mode, the AC main interface 2 is displayed as follows:

Vac set value

/Vrms meter value

OCPrms set value

/Irms meter value

•

When output is Off, the AC voltage set-

ting value is displayed.

•

When output is On, the Meter value of

voltage effective value is displayed.

•

When output is Off, the OCPrms setting

value is displayed.

•

When output is On, the Meter value of

current effective value is displayed.

No. Name Description

Quick Reference

No.

Name

Description

Q meter value

Displays the Meter value of the reactive

power.

P meter value

Displays the Meter value of the active

power.

S meter value

Displays the Meter value of the apparent

power.

vTHD meter value

Displays the Meter value of the total voltage

harmonic distortion.

iTHD meter value

Displays the Meter value of the total current

harmonic distortion.

Press the [Select] key to switch the AC main interface 1 and AC main in-

terface 2. When the AC main interface 1 is displayed, the [Select] key will

not light up; when the AC main interface 2 is displayed, the[Select] key

will light up. In the AC main interface 2, press the [Select] key to switch

the display among vTHD and iTHD, and press the [Select] key again to

switch back to AC main interface 1.

•

Under the DC mode, the DC main interface is displayed as follows:

Vdc set value

/Vdc meter

value

OCPrms set

value

/Idc meter value

•

When output is Off, the DC voltage setting

value is displayed.

•

When output is On, the Meter value of DC

voltage value is displayed.

•

When output is Off, the OCPrms setting val-

ue is displayed.

•

When output is On, the Meter value of DC

voltage value is displayed.

No. Name Description

Quick Reference

No.

Name

Description

P meter value

Displays the Meter value of the power.

OUT Mode

Displays the output mode of the instrument.

1.6

Configuration Menu at a Glance

Press the composite keys [Shift]+[V-set](Config) to enter into the Config menu

interface. At this time, the screen displays the optional menu. Click Rotary to

page up or page down the menu. Press the [Enter] key to enter into the se-

lected menu item. Press the [Esc] key to exit the menu function.

When the number before the menu item is in a flashing status (the digit is flash-

ing while the colon is not flashing), it indicates that this item is the selected

menu. The descriptions of configuration menu are listed in the table below.

Config

Configuration menu

I Range

Set the current measurement range.

High

High range

AC + DC

Set the AC + DC output mode.

Off

Turn off AC + DC output mode.

Turn on AC + DC output mode.

On Phase

Set the starting phase angle of the waveform. (only displayed

under the AC Mode)

Off Phase

Set the ending phase angle of the waveform. (only displayed

under the AC Mode)

V-Rise Time

Set the voltage rising time. (only displayed under the DC

Mode)

Wave

Set the output waveform type. (only displayed under the AC

Mode)

Sine

Sinusoidal

Square

Triangle

Saw

Sawtooth

Clip Sine

Clipped Sinusoidal

Clip Level

Clipped Percentage

THD1~THD30

30 sets of built-in waveforms.

Quick Reference

USER1~USER5

5 sets of user-defined waveforms.

Parallel

Set the instruments to 3-phase or series operation mode.

Single

Set the instrument to single mode,

i.e., disable the 3-phase or series

operation mode.

600V/1A

Set the instruments to series oper-

ation mode.

3 Phase

Set the instruments to 3-phase op-

eration mode.

1.7

System Menu at a Glance

Press the composite keys [Shift]+[DC](System) to enter into the System menu

interface. At this time, the screen displays the optional menu. Click Rotary to

page up or page down the menu. Press the [Enter] key to enter into the se-

lected menu item. Press the [Esc] key to exit the menu function.

The descriptions of system menu are listed in the table below.

System

System menu.

Beep

Set the beeper status.

Off

Turn the beeper off.

Turn the beeper on.

PowerOn

Set the power-on state.

Reset

When the power source is powered on, the power

source will initialize some settings and output state.

Last

When the power source is powered on, the power

source will remain the same settings and output state

as last time you turned off the power source.

Last+Off

When the power source is powered on, the power

source will remain the same settings as last time you

turned off the power source, but the output state is

OFF state.

I/O Config

Select the interface communicated with the computer. The optional inter-

face is dynamically displayed based on different interface cards.

NULL

No optional communication interfaces.

GPIB

When the expansion slot is inserted into the IT-

E1205, you can select the GPIB communication

interface.

Quick Reference

USB

When the expansion slot is inserted into the IT-

E1206 or IT-E1209, you can select the USB commu-

nication interface.

LAN

When the expansion slot is inserted into the IT-

E1206, you can select the LAN communication

interface.

RS232

When the expansion slot is inserted into the IT-

E1207, you can select the RS232 communication

interface.

CAN

When the expansion slot is inserted into the IT-

E1207, you can select the CAN communication

interface.

Analog

When the expansion slot is inserted into the IT-

E1208, you can select the Analog interface.

I/O Ad-

vance

Config

I/O Advance configuration. Based on the communication interface se-

lected by I/O Config, display configurable parameters of the communica-

tion interface in detail.

GPIB

When the I/O Config selects the GPIB interface, the following

information is displayed.

GPIB Address

Set the communication address within

the range from 1 to 30.

USB

When the I/O Config selects the USB interface, the following

information is displayed.

USBTM-

C&USBVCP

It is unnecessary to set the advancing

parameters for this interface.

LAN

When the I/O Config selects the LAN interface, the following

information is displayed.

Config

Set the address of the instrument.

IP Mode

Set IP mode.

Auto

Auto: automatically configure

the address of the instrument.

Manu

Manual: manually configure

the address of the instrument

by entering values in the fol-

lowing five fields.

The following information only

appear when Manu is

selected.

•

IP: IP address

•

Gate: Default gateway

•

Mask: Subnet mask

•

DNS1: DNS1 (Primary

address)

Quick Reference

•

DNS2: DNS2 (Secondary

address)

Server

Configure the LAN services.

Ping

Ping: Ping service state.

Off

mDNS

mDNS: mDNS service state.

Off

VXI-11

VXI-11: VXI-11 service state.

Off

Http

Http: Http service state.

Off

Telnet

Telnet: Telnet service state.

Off

Raw

Socket

RAWSocket: RAWSocket service state.

Off

Port

When the RAWSocket function is en-

abled, it is necessary to set the port num-

ber of the Raw- Socket interface.

LAN

Info

Viewing active LAN settings.

LAN Status

MAC Address

IP Address

Gateway Address

Submask Address

DHCP Server Address

DNS Server Address

Domain Name

Host Name

Description

LAN

Reset

Select whether to reset the LAN setting or not.

YES

RS232

When the I/O Config selects the RS232 interface, the following

information is displayed.

Quick Reference

Baudrate

Select the baud rate from the following

options: 4800, 9600, 19200, 38400,

57600, 115200. The data bit, parity bit

and stop bit are fixed: 8_None_1.

CAN

When the I/O Config selects the CAN interface, the following

information is displayed.

Can Address

Set the instrument address to a number

from 1 to 127.

Baudrate

Select the baud rate from the following

options: 125k, 250k, 500k.

Analog

When the I/O Config selects the Analog interface, the following

information is displayed.

Local/Analog

Enable or disable the analog control:

•

Local: local control;

•

Analog: external analog control.

Ext In Edge

Select the slope of the trigger signal: ris-

ing time or falling time.

External Cal

External voltage control calibration.

Relay Ctrl

Set the relay control.

Out Syn

The relay is linked with Output. When the instrument

output is On, the relay is closed; when the instrument

output is Off, the relay is open, and the instrument

and the load are electrically separated.

The relay is normally closed. Whether the instrument

out is On or Off will not affect the operation of relay.

System

Reset

Select whether to restore the factory default settings or not.

Don’t restore the factory default settings.

Yes

Restore the factory default settings.

System

Info

View the system information.

Manufacturer

Display the manufacturer.

Model

Display the instrument model.

Version

Display the software version.

Serial Number

Display the serial number.

SCPI Error

Display SCPI command error information.

Last Cal. Date

Display last calibration date.

Quick Reference

1.8

Optional Accessories

You can purchase accessories for the IT-M7700 series of instruments sepa-

rately, including the following:

•

Scalable interface

The interface expansion slot provided on the rear panel of the IT-M7700 ser-

ies instrument allows users to flexibly expand according to their needs. Dif-

ferent interface cards can be selected to achieve different functions.

Includes communication interface or external analog interface.

•

Cabinet installation

The IT-M7700 series instruments can be mounted on a standard 19-inch

cabinet. ITECH has prepared a special bracket for the user as a mounting

kit.

The detailed descriptions of the options are as follows.

The following optional accessories from ITECH are sold separately. Users

need to purchase separately.

Device Name

Model

Description

GPIB communi-

cation interface

IT-E1205

When the user needs to use GPIB interface

to enable remote operation, this option is

the right choice.

USB/LAN com-

munication

interface

IT-E1206

When the user needs to use USB and LAN

interface to enable remote operation, this

option is the right choice.

RS–232/CAN

communication

interface

IT-E1207

When the user needs to use RS–232 and

CAN interface to enable remote operation,

this option is the right choice.

Quick Reference

Device Name

Model

Description

External analog

communication

interface

IT-E1208

When the user needs to use external analog

function, this option is the right choice.

USB communica-

tion interface

IT-E1209

When the user needs to use USB interface

to enable remote operation, this option is

the right choice.

Cabinet installa-

tion kit

IT-E154

When the instrument needs to be installed

in cabinet, this kit is needed. Please refer to

《IT-E154 User Manual 》for detailed de-

scription about the installation method.

Hot swap is not available for the communication card and analog card. After

changing the communication card and analog card, you must re-start the

instrument.

Inspection and Installation

2 Inspection and Installation

Verifying the Shipment

Instrument Size Introduction

Rack Mounting

Connecting the Power Cord

Connecting the Device Under Test (DUT)

Connecting the Interface

2.1

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.

Table 2–1 Package box contents

Item

Qty.

Model

Remarks

Programma-

ble AC Power

Source

IT-M7700

series

This series include: IT-M7721/IT-

M7722/IT-M7721L/IT-M7722L

Power Cord

X 1

User may select an appropriate power

cord that matches the specifications of

power socket used in the area. See the

Section 2.4 Connecting the Power

Cord for details.

Multiple

instruments

connection

cables

X 1

IT-E251

When the user needs to connect the

System Bus interfaces between Multiple

instruments in series operation and

three-phase operation features, this

option is the right choice.

Ex-Factory

Test Report

X 1

It is the test report of the instrument be-

fore delivery.

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.

Inspection and Installation

2.2

Instrument Size Introduction

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

Please select appropriate space for installation based on the instrument size.

The detailed dimension drawings of the IT-M7700 series are as follows:

IT-M7721/IT-M7722

2.3

Rack Mounting

IT-M7700 series power can be mounted on a standard 19” rack. ITECH pro-

vides user with IT-E154 rack, as an optional mount kit. The detailed operation

please refer to the User Manual of your mount kit.

Inspection and Installation

2.4

Connecting the Power Cord

Precautions

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

precautions.

•

The power cords supplied with this product is certified for safety. In

case the supplied lines assembly needs to be replaced, or an exten-

sion lines must be added, be sure that it can meet the required

power ratings of this product. Any misuse voids the warranty of

this product.

•

Before connecting power cord, be sure to confirm that the power

voltage matches with the supply voltage.

•

Before connecting power cord, be sure to switch off the instrument.

Power switch is in Off position.

•

To avoid fire or electric shock, make sure to use the power cord

supplied by ITECH.

•

Do not use an extended power cord without protective grounding,

otherwise the protection function will fail.

•

Be sure to connect the main power socket to the power outlet with

protective grounding. Do not use terminal board without protective

grounding.

•

The instrument rear panel provides a separate screw used for chas-

sis ground. Please make proper connections. In the event of a fail-

ure, not using a properly grounded protective earth and grounded

outlet may result in personal injury or death due to electric shock.

Safety agency requirements dictate that there must be a way to

physically disconnect the AC mains cable from the unit. A dis-

connect device, either a switch or circuit breaker must be pro-

vided in the final installation. The disconnect device must be

close to the equipment, be easily accessible, and be marked as

the disconnect device for this equipment.

Categories of Power Cords

Please select appropriate power cords appropriate to local voltage based on the

specifications of power cords below. If purchased model fails to meet local volt-

age requirements, please contact distributor or factory for change.

Inspection and Installation

China

IT-E171

United States &

Canada & Japan

IT-E172

Europe

IT-E173

England

IT-E174

AC Power Input Level

Working voltage for IT-M7700 series power is 100 ~ 240V, AC power input level:

100 ~ 240V, 50 ~ 60Hz.

Connecting the Power Cord

To connect the power cord:

Make sure that the front-panel power switch is in the Off position.

Connect the female end of the supplied line cord to the AC receptacle on the

rear panel.

Connect the plug of the power cord to a grounded AC outlet.

Make proper connections of the chassis ground.

Inspection and Installation

2.5

Connecting the Device Under Test (DUT)

The instrument supports two connection methods between power supply and

DUT: Local measurement and Remote sensing.

•

Local measurement The voltage sensed by the instrument is the voltage at

the output terminal of the instrument.

•

Remote sensing The voltage sensed by the instrument is the voltage at the

terminal of the remote object under test.

Precautions

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

precautions.

•

Before connecting DUT, be sure to switch off the power supply.

Power switch is in Off position, otherwise touching the output ter-

minals on the rear panel may result in personal injury or death due

to electric shock.

•

To avoid electrical shock, before testing, please make sure the rat-

ing values of the testing cables, and do not measure the current

that higher than the rating value. All test cables shall be capable of

withstanding the maximum short circuit output current of the

power supply without causing overheat.

•

If several loads are provided, each pair of load wires shall safely

withstand the rated short circuit output current of the power supply

under full load.

•

During wiring, check that the anode and cathode of the test lines

are properly and tightly connected; anode On and cathode Off are

prohibited.

Specification

Test cables are not standard accessories for the instrument. Please select op-

tional red and black test cables for individual sales based on the maximum cur-

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

to A.1 Specifications of Red and Black Test Lines for more information.

Connecting the DUT (Local Measurement)

The connection diagram and steps of local sensing are as follows:

Inspection and Installation

Before connecting the DUT, be sure that the instrument Power is in Off

position.

Remove the cover of output terminal and remote sense terminal.

Connect the L+ and SL+, N- and SN- for short circuit using the short clips on

the back panel of the instrument or electric wire. When using local sense,

the remote sense terminal cannot be disconnected.

Loosen the screws of the output terminals and connect the red and black

test cables to the output terminals, and connect the ground terminal cor-

rectly. Re-tighten the screws.

Thread the red and black test cables through the output terminals cover of

the instrument and install the cover.

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

Connecting the DUT (Remote Sensing)

When the DUT consumes large current or the wires are too long, there is a volt-

age drop on the wires between the DUT and output terminal of the power sup-

ply. To maximize measurement accuracy, you can use remote sense wire

connections to monitor and improve the voltage adjustment on the DUT and

compensate for the voltage drop on the wires .

When the power supply is used for measuring battery charge in actual applica-

tions, the voltage drop of the wire will lead to voltage inconsistency of both ends

and inconsistency of the cutoff voltage of power supply and the actual voltage of

battery, resulting in inaccurate measurement.

The connection diagram and steps of remote sensing are as follows:

Inspection and Installation

Confirm that the power switch is in the Off position

Remove the cover of output terminal and remote sense terminal.

Disconnect the wires/short clips between SL+ and L+, SN- and N-.

Use armored twisted-pair cables to connect the remote sense terminals and

the device under test.

Loosen the screws of the output terminals and connect the red and black

test cables to the output terminals, and connect the ground terminal cor-

rectly. Re-tighten the screws.

Install the terminal cover, leave the other end of remote sense cables and

the red and black cables outside.

Connect the other end of the remote sense cables and the red and black ca-

bles to the DUT.

Test lines and sense lines should be as short as possible, and sense lines

should be twisted together.

2.6

Connecting the Interface

The IT-M7700 series power supply has no standard-equipped interfaces card.

Users can purchase interface cards separately. Users can choose one of RS-

232, USB, GPIB, LAN, CAN to communicate with the computer. For details, see

1.8 Optional Accessories

The reserved interface card installation slot is on the rear panel of the instru-

ment. Users can install it directly after purchasing the interface card. Hot swap

is not available for the interface card. After changing the interface card, you

must re-start the instrument.

The installing steps for the purchased interface card are as follows:

Inspection and Installation

Remove the plug of the rear panel interface.

Use a small flat screwdriver to press the clip at the upper cover opening.

At the same time, use another small flat screwdriver to stir the slots one

by one from another opening of the upper cover, and push the plastic

plug out.

Install the purchased communication card. Taking the LAN+USB interface

card as an example, push the card into the slot and secure with the screws

from the upper cover, it is shown as follow.

Firstly loosen the screws between upper cover and communication card and

removing the communication card like removing the plug, please use the

tools and remove it.

2.6.1

USB Interface

When the optional interface card is a stand-alone USB interface (IT-E1209) or

USB+LAN interface (IT-E1206), the following can help users quickly understand

the steps required to connect the USB interface. The figure below shows a typi-

cal USB interface system.

Inspection and Installation

Take the IT-E1209 communication card box as an example. If you install IT-

E1206, please refer to the actual interface position.

The operation steps to use the USB interface are as follows.

Refer to the USB connection diagram, Connect the power supply and the

computer using a cable with two USB interfaces (each end).

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select USB and press [Enter] key to confirm. The USB

communication supports the following two interface types and no need to se-

lect manually..

•

TMC: USB_TMC interface. When the host software uses USBTMC for

communication, this USB is the USB_TMC interface.

•

VCP: USB_VCP virtual serial port. When the host software uses the

USBVCP for communication(The WIN7/XP system needs to be installed

with IT-7722-VCP.inf. Download from the ITECH website or contact

ITECH agent), this USB is the USB_VCP interface.

Press [Esc] to exit the system menu setting.

2.6.2

GPIB Interface

When the optional interface card is a GPIB interface (IT-E1205), you need to

know the following. Each device on the GPIB (IEEE-488) interface must have a

unique whole number address between 1 and 30. Your computer’s GPIB inter-

face card address must not conflict with any instrument on the interface bus.

This setting is nonvolatile; it will not be changed by power cycling or *RST. The

figure below shows a typical GPIB interface system.

Inspection and Installation

The operation steps to use the GPIB interface are as follows.

Refer to the GPIB connection diagram, Connect the power supply and the

computer using a IEEE-488 bus.

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Advance Config and press [Enter] to enter

the GPIB advanced setting interface.

Rotate the knob to select GPIB Address and press [Enter] key to confirm.

Use left and right keys or rotate the knob to adjust the GPIB address and

press [Enter] key to confirm.

Press [Esc] to exit the system menu setting.

2.6.3

LAN Interface

When the user's optional interface card is a LAN+USB interface (IT-E1206), the

following is required to use the LAN interface.

Connect Interface

Use the following steps to quickly connect your instrument to your LAN and con-

figure it. Two typical LAN interface systems are described below: private LAN

and site LAN.

•

Connect to the private LAN

A private LAN is a network in which LAN-enabled instruments and com-

puters are directly connected. They are typically small, with no centrally

managed resources. When connected to a computer, a crossover cable can

be used to connect directly to the computer via the LAN interface.

•

Connect to the site LAN

A site LAN is a local area network in which LAN-enabled instruments and

computers are connected to the network through routers, hubs, and/or

Inspection and Installation

switches. They are typically large, centrally-managed networks with services

such as DHCP and DNS servers. When connected to a computer, a direct

attached network cable can be used to connect to the router, and the com-

puter is also connected to the router.

•

When using one crossover cable to connect PC directly, the gateway address of

the instrument should be consistent with that of the PC, and the IP address

should be at the same network segment with the PC’s IP address.

•

When the instrument and computer are connected to the router, an independent

IP address must be assigned for the instrument.

LAN Status Indicator

The lower icon notes the two status LEDs located at the bottom of the LAN port.

If neither of the LEDs is lit, the network is not connected.

•

Position 1: when lit, it indicates that the LAN port is connected.

•

Position 2: When flashing, it indicates that the LAN port is receiving or send-

ing a message.

Configure LAN Interface Information

When shipped, DHCP is on, which may enable communication over LAN. The

letters DHCP stands for Dynamic Host Configuration Protocol, a protocol for as-

signing dynamic IP addresses to devices on a network. With dynamic address-

ing, a device can have a different IP address every time it connects to the

network.

The user can view the related information of LAN interface or configure the com-

munication parameters in system menu.

•

Automatically configure the address of the instrument. Auto

When selected, the instrument will first try to obtain an IP address from a

DHCP server. If a DHCP server is found, the DHCP server will assign an IP

Inspection and Installation

address, Subnet Mask, and Default Gateway to the instrument. If a DHCP

server is unavailable, the instrument will try to obtain an IP address using

AutoIP. AutoIP automatically assigns an IP address, Subnet Mask, and De-

fault Gateway addresses on networks that do not have a DHCP server.

•

Manually configure the address of the instrument. Manual

Set the following parameter. The following information only appear when

Manual is selected.

–

IP: This value is the Internet Protocol (IP) address of the instrument. An

IP address is required for all IP and TCP/IP communications with the in-

strument. An IP Address consists of 4 decimal numbers separated by pe-

riods. Each decimal number ranges from 0 through 255 with no leading

zeros (for example, 169.254.2.20).

–

Gate: This value is the IP Address of the default gateway that allows the

instrument to communicate with systems that are not on the local subnet,

as determined by the subnet mask setting. The same numbering notation

applies as for the IP Address. A value of 0.0.0.0 indicates that no default

gateway is defined.

–

Mask: This value is used to enable the instrument to determine if a client

IP address is on the same local subnet. The same numbering notation

applies as for the IP Address. When a client IP address is on a different

subnet, all packets must be sent to the Default Gateway.

–

DNS1: This field enters the primary address of the server. Contact your

LAN administrator for server details. The same numbering notation ap-

plies as for the IP Address. A value of 0.0.0.0 indicates that no default

server is defined.

DNS is an internet service that translates domain names into IP ad-

dresses. It is also needed for the instrument to find and display its host

name assigned by the network. Normally, DHCP discovers the DNS ad-

dress information; you only need to change this if DHCP is unused or not

functional.

–

DNS2: This field enters the secondary address of the server. Contact

your LAN administrator for server details. The same numbering notation

applies as for the IP Address. A value of 0.0.0.0 indicates that no default

server is defined.

Operation Steps:

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select LAN and press [Enter] key to confirm.

Rotate the knob to select I/O Advance Config and press [Enter] to enter

the LAN advanced setting interface.

Rotate the knob to select IP Config and press [Enter] key to set the instru-

ment address.

Rotate the knob to select IP Mode and press [Enter] key to select the IP set-

ting mode.

Inspection and Installation

•

Auto: automatically configure the addressing of the instrument;

•

Manu: manually configure the addressing of the instrument. If Manu is

selected, set the parameters such as IP and Gate.

After setting, press [Esc] to exit.

Reset the LAN Setting

After configuring the LAN settings, the user need to reset the settings to make it

valid in the instrument. The operation steps to reset the LAN settings are as

follows.

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select LAN and press [Enter] key to confirm.

Rotate the knob to select I/O Advance Config and press [Enter] to enter

the LAN advanced setting interface.

Rotate the knob to select LAN Reset and press [Enter] key to reset the LAN

parameter configuration.

•

NO: indicates refuse to reset the LAN setting.

•

YES: indicates reset the LAN setting.

View LAN Interface Information

The operation steps to view the LAN interface information are as follows.

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select LAN and press [Enter] key to confirm.

Rotate the knob to select I/O Advance Config and press [Enter] to enter

the LAN advanced setting interface.

Rotate the knob to select LAN Info and press [Enter] to view the LAN inter-

face information.

Rotate the knob to view the LAN interface information. Refer to 1.7 System

Menu at a Glance for more information.

After setting, press [Esc] to exit.

Enable LAN services

The configurable services include: mDNS, Ping, Http, Telnet, VXI-11 and Raw

Socket. When using the LAN interface, these services are enabled by default

and can be used directly. If you need to turn it off or on again, please refer to the

following steps:

Inspection and Installation

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select LAN and press [Enter] key to confirm.

Rotate the knob to select I/O Advance Config and press [Enter] to enter

the LAN advanced setting interface.

Rotate the knob to select Server and press [Enter] key to enable or disable

the LAN service.

Rotate the knob to select the service you want to enable and press[Enter]

key to confirm.

Rotate the knob to switch On and Off options. After selecting On or Off,

press [Enter] key to confirm.

•

On: indicates enable the service.

•

Off: indicates disable the service.

When enabling the Raw Socket service, the user needs to set the corre-

sponding Port.

After setting, press [Esc] to exit.

2.6.3.1

Using Http Server

The instrument has a built-in Http server for monitoring and controlling the in-

strument via a Http browser in PC. To use the Http server, connect the instru-

ment and PC over LAN interface and enter the instrument's IP address into the

address bar at the top of your PC's Http browser, you can access the front panel

control functions including the LAN configuration parameters.

•

If you want to remotely control the instrument using the built-in Http server, you

must enable the Http service. See 2.6.3 LAN Interface for details.

•

Up to six simultaneous connections are allowed. With additional connections,

performance will be reduced.

As shipped, the login password of the Http interface defaults to 12345678. To

change the password, click the Security button in the navigation bar on the left

side of the window after login.

Enter the password and then click the LOGIN button, the Http interface will ap-

pear in the browser as shown below.

Inspection and Installation

You can select different interfaces by clicking the seven buttons shown in the

navigation bar on the left side of the window. The detailed descriptions are as

follows.

•

Home: Http home interface, displays the model and appearance of the

instrument.

•

Information: Displays the serial number of the instrument and more system

information as well as LAN configuration parameters.

•

Web Control: Enables the Web control to begin controlling the instrument.

This page allows you to monitor and control the instrument.

•

LAN Configuration: Reconfigure the LAN parameters.

•

Security: Change the password and control access to the Http interface.

•

Manual: Go to the ITECH official website and view or download the relevant

documents.

•

Logout: Logout the Http interface.

2.6.3.2

Using Telnet

The Telnet utility (as well as sockets), is another way to communicate with the

instrument without using I/O libraries or drivers. In all cases, you must first es-

tablish a LAN connection from your computer to the instrument as previously

described.

In an MS-DOS Command Prompt box, type “telnet hostname” where hostname

is the instrument’s hostname or IP address. Press the Enter key and you should

get a Telnet session box with a title indicating that you are connected to the

Inspection and Installation

Pins Description

instrument and 23 is the instrument’s telnet port. Type the SCPI commands at

the prompt.

2.6.3.3

Using Sockets

The instruments allow any combination of up to six simultaneous

socket and telnet connections to be made.

ITECH instruments have SCPI socket services, which can be used to send and

receive ASCII/SCPI commands, queries, and query responses. All commands

must be terminated with a new line for the message to be parsed. All query re-

sponses will also be terminated with a new line.

2.6.4

RS-232 Interface

When the optional interface card is RS232+CAN interface (IT-E1207), the fol-

lowing can help users quickly understand the steps required to connect the RS-

232 interface. The figure below shows a typical RS-232 interface system that

connects to your computer using an RS-232 cable.

Definition of RS-232 Pins

The definition of RS-232 pins are as follows.

IT-E1207

TXD, transmit data

RXD, receive data

GND

CAN_H

CAN_L

Inspection and Installation

Name Description

RS-232 Connection

Directly connected to the computer, as shown below:

RS–232 Configuration

The user needs to configure the RS–232 interface parameters in the system

menu before using the remote control. The RS–232 interface parameters are as

follows.

Baud rate Select the baud rate from the following options: 4800,

9600, 19200, 38400, 57600, 115200.

Data Bit 8 (fixed)

Parity bit None (fixed)

Stop bit 1(fixed)

The operation steps are as follows.

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select RS-232 and press [Enter] key to confirm.

Rotate the knob to select I/O Advance Config and press [Enter] key to en-

ter the RS-232 Advancing Setting interface.

Rotate the knob to select Baud Rate and press [Enter] key to confirm.

Use left and right keys or rotate the knob to set the communication baud

rate, and press [Enter] key to confirm.

Press [Esc] to exit the system menu setting.

Inspection and Installation

Pins Description

RS-232 Troubleshooting

If you meet some problems when communicating with PC by RS-232 interface,

please check the following items:

•

PC and power source must have the same baud rate.

•

Ensure you have used the correct communication cable (CAN_H, CAN_L).

Please pay attention that some cable may not have a correct internal wiring

even it is with an appropriate interface.

•

The cable must be connected to the correct serial ports (COM1, COM2, etc)

of PC.

2.6.5

CAN Interface

When the optional interface card is RS232+CAN interface (IT-E1207), the fol-

lowing can help users quickly understand the steps required to connect to the

CAN interface.

The following figure shows the CAN interface system. The user can select the

CAN interface converter to connect to your computer according to the actual sit-

uation. Take the CAN to USB interface device as an example.

Definition of CAN Pins

The definition of CAN pins are as follows.

IT-E1207

TXD, transmit data

RXD, receive data

GND

CAN_H

CAN_L

Inspection and Installation

Name Description

CAN Configuration

The user needs to configure the CAN interface parameters in the system menu

before using the remote control. The CAN interface parameters are as follows.

Baud rate Select the baud rate from the following options:

125k, 250k, 500k.

Instrument Address Range: 1 to 127.

The operation steps are as follows.

Press the composite keys [Shift] + [DC](System) to enter into the system

menu interface.

Rotate the knob to select I/O Config and press [Enter] key to confirm.

Rotate the knob to select CAN and press [Enter] key to confirm.

Rotate the knob to select I/O Advance Config and press [Enter] key to en-

ter the CAN Advancing Setting interface.

Rotate the knob to select Can Address and press [Enter] key. After setting

the communication address, press [Enter] key to confirm.

Rotate the knob to select Baudrate and press [Enter] key. After setting the

baudrate, press [Enter] key to confirm.

Press [Esc] to exit the system menu setting.

CAN Troubleshooting

If you meet some problems when communicating with PC by CAN interface,

please check the following items:

•

PC and power source must have the same baud rate.

•

Ensure you have used the correct communication cable (CAN_H, CAN_L).

Please pay attention that some cable may not have a correct internal wiring

even it is with an appropriate interface.

Getting Started

3 Getting Started

Before learning the details of IT-M7700, let us briefly cover the use of the IT-

M7700.

Power-on the Instrument

Applying DC Output

Applying Waveform Output

3.1

Power-on the Instrument

Precautions

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

precautions.

•

Before connecting power cord, be sure to confirm that the power

voltage matches with the supply voltage.

•

Be sure to connect the main power socket to the power outlet with

protective grounding. Do not use terminal board without protective

grounding. Before operation, be sure that the instrument is well

grounded.

•

Ensure that the output electrodes are either insulated or covered

using the safety covers provided, so that no accidental contact with

lethal voltages can occur.

•

If you notice strange sounds, unusual odors, fire, or smoke around

or from inside the instrument, flip the POWER switch to the (O) side

to turn the instrument off, or remove the power cord plug from the

outlet. The detachable power cord may be used as an emergency

disconnecting device. Removing the power cord will disconnect

AC input power to the unit.

Power Switch Introduction

The power switch is located in the lower left corner of the front panel. See 1.2

Front Panel at a Glance for details. The power switch is a push button. Press

the button once to turn the instrument on and press it again to turn the instru-

ment off.

Getting Started

Turning the POWER Switch On

Check that the power cord is connected properly.

Turn the unit on with the front panel power switch. The front panel display will

light up after a few seconds. A power-on self-test occurs automatically when

you turn the unit on. This test assures you that the power source is operational.

If a self-test error occurs, an error message will be displayed in the front panel.

Press the [Esc] button to try to clear the current fault status. The user can also

restart the instrument to try to clear the fault status. Wait until the power is

turned off and then start again. If the problem still cannot be solved after restart-

ing, please contact the ITECH engineer. Please refer to Error information list for

detailed information about common error messages.

•

It may take about 30 seconds or so for the power source to initialize before it is

ready for use.

•

When you turn the POWER switch on for the first time after purchase, the instru-

ment starts with its factory default settings. Each time thereafter, the instrument

starts according to the setting that you selected as outlined in 4.9.5 Set the

Power-on State.

Turning the POWER Switch Off

Turn the unit off with the front panel power switch. When it is turned off, the in-

strument interface will prompt “AC Power Off”.

After you turn the POWER switch off, wait at least 10 seconds after the fan

stops before you turn the POWER switch back on. Turning the instrument on

too soon after you turn it off can cause damage to the inrush current limiter cir-

cuit, as well as reduce the life of components such as the POWER switch and

the internal input fuses.

Getting Started

3.2

Applying DC Output

The IT-M7700 can be used as a DC power supply. In the following process, the

IT-M7700 is configured as a DC power supply and outputs 20V voltage.

Press the [DC] key to set the instrument to DC output mode.

10.0V 2.00A

0.00W DC MODE

Setting the Source value (voltage output value).

Press [V-set] key to position the cursor to the voltage setting value.

Meanwhile, the [V-set] key will light up.

10.0V 2.00A

0.00W DC MODE

Rotate the knob clockwise to increase the voltage setting value and anti-

clockwise to decrease the value. Set the required value. When setting

the negative voltage value, rotate the current voltage setting value anti-

clockwise to 0, and then continue to rotate anticlockwise to the negative

voltage value.

The knob can be used together with the left/right navigation keys. Press

the left/right navigation keys to move the cursor to a digit. Rotate the

knob to change the digit value.

Press [Enter] key to confirm the voltage setting value.

Press [Esc] key to exit the input mode.

Setting the Limit value (current limit point).

Press the composite keys [Shift]+[F-set](Protect) to enter Protect menu

interface.

1:OVP(rms) = 300.00V

2:OVP(peak) = 440.00V

Rotate the knob to select MCL and press [Enter] key to confirm.

8:MCL =

20.0A

9:Sense Check = Off

Rotate the knob to adjust the max current limit and press [Enter] key to

confirm.

If the input process suspends for more than 5 seconds, the input mode

will be automatically exited. If you want to abandon input, please press

[Esc] key to exit.

Press [Esc] to exit the protection menu setting.

Enable the Output.

Press [On/Off] key to enable the instrument output. When the Output is in

On status, the Output [On/Off] key will light up; when the Output is in Off sta-

tus, the Output [On/Off] will light off.

Checking the Meter values of voltage, current, and power.

After the Output is enabled, the instrument will continuously measure and

display the Meter values of voltage, current, and power on the front panel.

Getting Started

20.1V 0.08A

1.68W DC MODE

When the power supply is used as a DC power supply, please understand

the related ripple parameters for this instrument when served as a DC power

supply. If there are strict noise requirements, it is necessary to add additional

DC noise filter to obtain low noise and good and stable DC voltage for test.

3.3

Applying Waveform Output

IT-M7700 can be used as a waveform generator. In the following process, IT-

M7700 is configured as a waveform generator and outputs 10V/50Hz Sine

wave.

Press the [AC] key to set the instrument to AC output mode.

50.0V

6.00A

60.0Hz

0.00W

0.00Ip

0.00PF

Set the AC Voltage.

Press [V-set] key to position the cursor to the voltage setting value.

50.0V

6.00A

60.0Hz

0.00W

0.00Ip

0.00PF

Rotate the knob clockwise to increase the voltage setting value and anti-

clockwise to decrease the value. Set the required value.

The knob can be used together with the left/right navigation keys. Press

the left/right navigation keys to move the cursor to a digit. Rotate the

knob to change the digit value.

Press [Enter] key to confirm the voltage setting value.

Press [Esc] key to exit the input mode.

Set the AC Frequency.

Press [F-set] key to position the cursor to the frequency setting value.

10.0V

6.00A

60.0Hz

0.00W

0.00Ip

0.00PF

Rotate the knob clockwise to increase the frequency setting value and

anticlockwise to decrease the value. Set the required value.

The knob can be used together with the left/right navigation keys. Press

the left/right navigation keys to move the cursor to a digit. Rotate the

knob to change the digit value.

Press [Enter] key to confirm the frequency setting value.

Press [Esc] key to exit the input mode.

Set the AC Phase Angle.

Press the composite keys [Shift]+[V-set](Config) to enter into the config-

uration menu interface.

Getting Started

1:I Range = Auto

2:AC + DC = Off

Rotate the knob to select On Phase and press [Enter] key to confirm.

3:On Phase = 0.0°

4:Off Phase = 0.0°

Use left and right keys and rotate the knob to set the starting phase an-

gle. Press [Enter] key to confirm.

If the input process suspends for more than 5 seconds, the input mode

will be automatically exited. If you want to abandon input, please press

[Esc] key to exit.

Rotate the knob to select Off Phase and press [Enter] key to confirm.

4:Off Phase = 0.0°

6:Wave = Sine

Use left and right keys and rotate the knob to set the ending phase angle.

Press [Enter] key to confirm.

If the input process suspends for more than 5 seconds, the input mode

will be automatically exited. If you want to abandon input, please press

[Esc] key to exit.

Select the Output Waveform.

In the Config menu page, rotate the knob to select Wave and press

[Enter] to enter the setting page.

6:Wave = Sine

7: --EXIT--

Rotate the knob to select Sine and press [Enter] key to confirm.

If the input process suspends for more than 5 seconds, the input mode

will be automatically exited. If you want to abandon input, please press

[Esc] key to exit.

Press [Esc] to exit the configuration menu setting.

Setting the Limit value (current limit point).

Press the composite keys [Shift]+[F-set](Protect) to enter Protect menu

interface.

1:OVP(rms) = 300.00V

2:OVP(peak) = 440.00V

Rotate the knob to select MCL and press [Enter] key to confirm.

8:MCL = 20.0A

9:Sense Check = Off

Rotate the knob to adjust the max current limit and press [Enter] key to

confirm.

If the input process suspends for more than 5 seconds, the input mode

will be automatically exited. If you want to abandon input, please press

[Esc] key to exit.

Press [Esc] to exit the protection menu setting.

Enable the Output.

Getting Started

Press [On/Off] key to enable the instrument output. When the Output is in

On status, the Output [On/Off] key will light up; when the Output is in Off sta-

tus, the Output [On/Off] will light off.

Check the Meter value of the instrument.

After the output is enabled, the instrument will continuously measure and

display the Meter values of Vrms, Irms, Freq, Ip, PF, Q, P, S, vTHD, and

iTHD on the front panel.

10.03V 0.0005A

50.0Hz

0.00W 0.0056Ip

1.00PF

Press the [Select] key to switch the display of Meter value.

10.03V 0.0005A Q= 0.0

0.00W 0.0VA vTHD=1.02

Operation and Application

4 Operation and Application

This chapter describes the operation and application of the instrument in

details.

Select the Output Mode

Set the AC Output

Set the DC Output

Set the Over-current Protection Point

Turning the Output On and Off

Executing Measurement

Function Operation

Protection Function

System-Related Operations

External Analog Quantity Function (Option)

4.1

Select the Output Mode

The IT-M7700 series power supply has 3 output modes: AC, DC and AC+DC.

The User should set specific output mode based on required applications.

AC Mode

This mode is the default mode when the instrument is powered on (It is neces-

sary to press [AC] key to switch the DC mode back to the AC mode), indicating

that the instrument is used as AC power supply. Under this mode, the instru-

ment will generate AC output.

Please refer to 4.2 Set the AC Output for the setting of related output parame-

ters of the instrument under AC mode.

DC Mode

Press [DC] key on the front panel to switch the instrument from AC mode to DC

mode. At this moment, the instrument serves as a DC power supply. Under this

mode, the instrument will generate DC output.

Please refer to 4.3 Set the DC Output for the setting of related output parame-

ters of the instrument under DC mode.

Operation and Application

AC+DC Mode

When the AC+DC is turned on, it indicates that the instrument serves as an AC/

DC power supply. Under this mode, the instrument will stack DC voltage compo-

nents based on the generated AC voltage. The turning-on method is as shown

below:

Press the composite keys [Shift] + [V-set](Config) to enter into the configu-

ration menu interface.

Rotate the knob to select AC+DC and press [Enter] key to confirm.

Rotate the knob to switch On and Off options. After selecting On, press

[Enter] key to confirm.

•

On: indicates that the AC+DC output mode is turned on.

•

Off: default value, indicates that the AC+DC output mode is turned off.

Press [Esc] to exit the configuration menu setting.

The related output parameters of the instrument under the AC+DC mode must

be configured under the AC and DC mode independently. Please refer to 4.2

Set the AC Output and 4.3 Set the DC Output.

When the instrument Output is On, it is unable to switch the AC and DC out-

put mode. Only when the instrument Output is Off, you can switch the output

mode by pressing the [AC] and [DC] key.

4.2

Set the AC Output

You can set the voltage, frequency, starting/ending phase angle and waveform

type of the AC output. Before operating the AC output, please select the AC out-

put mode.

4.2.1

Set the AC Voltage

The setting range of AC voltage setting value is between 0V and full-scale rated

output voltage, which is limited by Vac-Max and Vac-Min, i.e., the Vac setting

value should not be higher than Vac-Max and not lower than Vac-Min. Please

refer to 4.8.9 Limiting the Setting Value Range for the setting of Vac-Max and

Vac-Min.

To set Vac, refer to the steps below:

Press the [AC] key to set the instrument to AC output mode.

Press [V-set] key to position the cursor to the voltage setting value. Mean-

while, the [V-set] key will light up.

50.0V 6.00A 60.0Hz

Operation and Application

0.00W 0.00Ip 0.00PF

Rotate the knob clockwise to increase the voltage setting value and anti-

clockwise to decrease the value. Set the required value.

The knob can be used together with the left/right navigation keys. Press the

left/right navigation keys to move the cursor to a digit. Rotate the knob to

change the digit value.

Press [Enter] key to confirm the voltage setting value.

Press [Esc] key to exit the input mode.

4.2.2

Set the AC Frequency

The setting range of AC frequency setting value is between 45.0Hz and

1000.0Hz, which is limited by Freq-Max and Freq-Min, i.e., the Freq setting val-

ue should not be higher than Freq-Max and not lower than Freq-Min. Please re-

fer to 4.8.9 Limiting the Setting Value Range for the setting of Freq-Max and

Freq-Min.

To set Freq, refer to the steps below:

Press the [AC] key to set the instrument to AC output mode.

Press [F-set] key to position the cursor to the frequency setting value. Mean-

while, the [F-set] key will light up.

10.0V 6.00A 60.0Hz

0.00W 0.00Ip 0.00PF

Rotate the knob clockwise to increase the frequency setting value and anti-

clockwise to decrease the value. Set the required value.

The knob can be used together with the left/right navigation keys. Press the

left/right navigation keys to move the cursor to a digit. Rotate the knob to

change the digit value.

Press [Enter] key to confirm the frequency setting value.

Press [Esc] key to exit the input mode.

4.2.3

Set the AC Phase Angle

IT-M7700 series supports the initial phase and stop phase of the output wave-

form settable to meet different test requirements. The initial phase and stop

phase are set in the range of 0.0°~359.9°. By adjusting the phase angle, the

user can test the rush current of the product at different positions which is widely

applied to various switch current impulse tests and various rectifiers test. The

setting steps are as follows:

Press the composite keys [Shift] + [V-set](Config) to enter into the configu-

ration menu interface.

Rotate the knob to select On Phase and press [Enter] key to confirm.

Operation and Application

Use left and right keys and rotate the knob to set the starting phase angle.

Press [Enter] key to confirm.

Rotate the knob to select Off Phase and press [Enter] key to confirm.

Use left and right keys and rotate the knob to set the ending phase angle.

Press [Enter] key to confirm.

Press [Esc] to exit the configuration menu setting.

4.2.4

Select the Output Waveform

The user can select the type of output waveform for this power supply, includ-

ing: sine wave, square wave, triangle wave, saw wave, clip sine wave,

THD1~THD30 wave, and USER1~USER5 wave. The setting steps are as

follows:

Press the composite keys [Shift] + [V-set](Config) to enter into the configu-

ration menu interface.

Rotate the knob to select Wave and press [Enter] key to confirm.

Rotate the knob to switch the display of various waveform items. After se-

lecting one waveform, press [Enter] key to confirm.

•

Sine: Sinusoidal

•

Square:

•

Triangle

•

Saw: Sawtooth

•

Clip Sine: Clipped Sinusoidal

•

THD1~THD30: 30 sets of built-in waveforms.

•

USER1~USER5: 5 sets of user-defined waveforms.

When the Clip Sine output waveform is selected, you can set the clipped

percentage.

Rotate the knob to select Clip Level and press [Enter] key to enter the

setting page.

Use left and right keys and rotate the knob to set the clipped percentage.

Press [Enter] key to confirm.

Press [Esc] to exit the configuration menu setting.

•

The user-defined waveforms need to be defined in and downloaded from the re-

mote PC. Refer to the IT-M7700 Series Software User Manual for operation

methods.

•

Refer to A.2 Built -in Waveforms for detailed built-in THD waveforms.

•

IT-M7721L/IT-M7722L only supports sine waveform.

Operation and Application

4.3

Set the DC Output

You can set the voltage and voltage rise time for the DC output. Before operat-

ing the DC output, please select the DC output mode.

4.3.1

Set the DC Voltage

The setting range of DC voltage setting value is between 0V and full-scale rated

output voltage, which is limited by Vdc-Max and Vdc-Min, i.e., the Vdc setting

value should not be higher than Vdc-Max and not lower than Vdc-Min. Please

refer to 4.8.9 Limiting the Setting Value Range for the setting of Vdc-Max and

Vdc-Min.

To set Vdc, refer to the steps below:

Press the [DC] key to set the instrument to DC output mode.

Press [V-set] key to position the cursor to the voltage setting value. Mean-

while, the [V-set] key will light up.

10.0V 2.00A

0.00W DC MODE

Rotate the knob clockwise to increase the voltage setting value and anti-

clockwise to decrease the value. Set the required value.

The knob can be used together with the left/right navigation keys. Press the

left/right navigation keys to move the cursor to a digit. Rotate the knob to

change the digit value.

Press [Enter] key to confirm the voltage setting value.

Press [Esc] key to exit the input mode.

When the power supply is used as a DC power supply, please understand

the related ripple parameters for this instrument when served as a DC power

supply. If there are strict noise requirements, it is necessary to add additional

DC noise filter to obtain low noise and good and stable DC voltage for test.

4.3.2

Set the DC Voltage Rise Time

With this power supply, you can set the voltage rise time under the DC mode,

with the setting range of 0ms ~ 99,999ms. 0ms means Off, indicating that the

power supply voltage rises quickly with maximum tolerance. The voltage rise

time means the time when the power supply output voltage reaches the stable

setting value for the first time from zero time. You can set the voltage rise time

on the front panel or through remote control operation. The set voltage rise time

will affect the voltage change speed when the real-time voltage changes. The

setting steps are as follows:

Operation and Application

Press the composite keys [Shift] + [V-set](Config) to enter into the configu-

ration menu interface.

Rotate the knob to select V-Rise Time and press [Enter] key to confirm.

Use left and right keys and rotate the knob to set the voltage rise time. Press

[Enter] key to confirm.

Press [Esc] to exit the configuration menu setting.

4.4

Set the Over-current Protection Point

With this instrument, you can directly set the over-current protection point value

for the OCP (rms) function through the [I-set] key. Refer to 4.8.5 Set the Over-

Current Protection (peak) for the related description of OCP (rms).

The setting range of over-current protection point value is between 0A and full-

scale rated output current, which is limited by OCP-Max and OCP-Min, i.e., the

over-current protection point value should not be higher than OCP-Max and not

lower than OCP-Min. Please refer to 4.8.9 Limiting the Setting Value Range for

the setting of OCP-Max and OCP-Min.

To set OCPrms, refer to the steps below:

Press [I-set] key to position the cursor to the OCPrms setting value.

Meanwhile, the [I-set] key will light up.

50.0V 6.00A 60.0Hz

0.00W 0.00Ip 0.00PF

Rotate the knob clockwise to increase the OCPrms setting value and

anticlockwise to decrease the value. Set the required value.

The knob can be used together with the left/right navigation keys. Press the

left/right navigation keys to move the cursor to a digit. Rotate the knob to

change the digit value.

Press [Enter] key to confirm the OCPrms setting value.

Press [Esc] key to exit the input mode.

Operation and Application

4.5

Turning the Output On and Off

•

The [On/Off] key light is off and turning the output off does not

place the instrument in a safe state. Hazardous voltages may be

present on all output and guard terminals. Putting the equipment

into an output-off state does not guarantee that the outputs are

powered off if a hardware or software fault occurs. See the cautions

about connecting the DUT before connecting DUT.

•

To prevent electrical shock that could cause injury or death, please

ensure that the power source and DUT have been connected well

before you turn the output on.

•

The [On/Off] key is used to turn the output/input on or off under

normal circumstances. Even if the instrument is in control by PC or

the keyboard is locked, the [On/Off] is still valid.

You can turn the IT-M7700 output on or off from the front panel [On/Off] key.

Press the [On/Off] key, and the key lights up, indicating the real-time output is

On. The Meter value on the interface will display the voltage, current, or power

values of the real-time circuit; press [On/Off] key again, and the key lights off,

indicating that the real-time output is Off.

4.6

Executing Measurement

In this power supply, you can measure actual performance of the output termi-

nal of the power supply without using other measurement instruments. When

the power supply Output is On, it will measure the V, I, F, and P of the output ter-

minal of the power supply. Before executing measurement, the user needs to

set the current measurement range.

4.6.1

Measurement Functions

This power supply provides measurement functions for 12 types of electrical pa-

rameters. All these measurement parameters can be displayed on the main

interface.

•

Under the DC mode, the DC main interface displays all DC measurements:

Vdc, Idc and P.

•

Under the AC mode, the AC main interface 1 displays the following AC

measurements: Vrms, Irms, F, P, Ip, and PF; and the AC main interface 2

displays the following AC measurements: Vrms, Irms, Q、P, S, vTHD and

Operation and Application

Function Definition

iTHD. You can use the [Select] key to switch between the AC main interface

1 and the AC main interface 2.

The definitions of the functions are listed in the following table:

AC Mode

Vrms It is the measurement of Voltage effective value.

Irms It is the measurement of Current effective value.

F It is the measurement of Frequency.

Active Power.

Ip Current peak-to-peak value.

PF It is the Power Factor, and its calculation formula = P/S.

It is the Reactive Power, and its calculation formula =

S It is the Apparent Power, and its calculation formula =

Vrms × Irms。

vTHD Total voltage harmonic distortion factor.

iTHD Total current harmonic distortion factor.

DC Mode

Vdc It is the measurement of DC Voltage.

Idc It is the measurement of DC Current.

P Power.

4.7

Function Operation

4.7.1

List Function

IT-M7700 List mode supports program complex waveform editing. The users

can edite 5 list files (List1 to List5) , each file can be edited up to 50 steps. Each

step settable parameters include: basic waveform (incl. THD and user defined

waveform), AC/DC amplitude, slew rate, frequency, dwell time, start/stop phase

angle, times of repetition etc. This function with complex waveforms can help

users to simulate grid disturbance, periodic power off and so on.

Operation and Application

This power supply needs to use the IT-M7700 Series Software to edit the List

function contents, and download the List files to local equipment. Then, the in-

strument can locally run the List function. The user can also run all functions of

the List in the IT- M7700 Series Software.

Operation Steps:

Edit List Program.

Please refer to “Edit List File” or “Export/Import List in PC” in the IT-M7700

Series Software User Manual to edit the List file.

Set the List mode.

Press the composite keys [Shift] + [I-set](Function) to enter function

menu interface.

1:List Mode = Off

2:List Trigger = On

Rotate the knob to select List Mode and press [Enter] key to confirm.

Rotate the knob to select the name of the List file to be run and press

[Enter] key to confirm.

•

Off: Default value, indicating that the List Mode function is disabled.

•

1: indicate that the List Mode function is enabled, and List 1 file is

called.

•

2: indicate that the List Mode function is enabled, and List 2 file is

called.

•

3: indicate that the List Mode function is enabled, and List 3 file is

called.

•

4: indicate that the List Mode function is enabled, and List 4 file is

called.

•

5: indicate that the List Mode function is enabled, and List 5 file is

called.

Set the trigger mode to run the List.

Select List Trigger in the Function menu interface and press [Enter] key

to confirm.

Rotate the knob to switch On and Off options. After selecting On or Off,

press [Enter] key to confirm.

•

Off: After the Trigger key is pressed, the instrument will automatically

run the real-time List file.

•

On: After the Trigger key is pressed, the instrument will run the real-

time List file in single step.

Press [Esc] to exit the function menu setting.

Press the [On/Off] key to turn on the instrument output.

50.0V 3.00A

50.0Hz

List 5 Step 0/ 7 Stop

Press the composite keys [Shift] + [On/Off](Trigger) on the front panel to

run the selected List file.

Operation and Application

50.0V 3.00A

50.0Hz

List 5 Step 1/ 7

Run

•

When List Trigger = On, press the Trigger key once, and the instrument

will run one step of List output.

•

When List Trigger = Off, the instrument will output based on defined List.

IT-M7721L/IT-M7722L do not support list function.

4.7.2

Dimmer Function

The Dimmer Function aims to adjust the light illuminance intensity by setting the

phase angle and concealing the leading edge or trailing edge waveform. This

IT-M7700 series power supply supports front and rear phase angle dimmer or

speed adjustment test to verify whether the product has potential quality prob-

lem when the end user uses dimmer or the speed controller.

•

Dimmer of leading edge

•

Dimmer of trailing edge

Operation and Application

Press the [AC] key to set the instrument to AC output mode.

Refer to 4.2 Set the AC Output to set parameters related to basic Sine

waveform.

Enable the phase dimmer function.

Press the composite keys [Shift] + [I-set](Function) to enter function

menu interface.

Rotate the knob to select Dimmer and press [Enter] key to confirm.

Rotate the knob to switch the display among Off, LeadingEdge and

TrailingEdge . After selecting LeadingEdge or TrailingEdge , press

[Enter] key to confirm.

•

Off: Default value, indicating that the Dimmer function is disabled.

•

LeadingEdge: indicate that the Leading Edge Dimmer function is

enabled.

•

TrailingEdge: indicate that the Trailing Edge Dimmer function is

enabled.

Set the dimmer phase angle.

Rotate the knob and select the Dimmer Phase. Press [Enter] key to set

the dimmer phase angle.

Press [Esc] to exit the function menu setting.

Press [On/Off] key, and the power supply outputs the set phase dimmer

waveform. Press[On/Off] again to stop output.

10.0V 3.00A 45.0Hz

Phase= 90.0° TrailingEdge

•

The phase dimmer function can only be used under the AC Mode.

•

IT-M7721L/IT-M7722L do not support dimmer function.

4.7.3

Surge/Trap Function

IT-M7700 provides surge/trap simulation. The user can add surge/trap to simu-

late abnormal voltage fluctuation on the basis of outputting Sin wave, and test

usage of the DUT under this circumstance. The descriptions of surge/trap menu

are listed in the table below.

Surge Trap

Surge/trap function.

Off

Turn the surge/trap function off.

Turn the surge/trap function on.

Period

Set the period of the surge/trap.

Operation and Application

Width

Set the surge/trap width.

Percent

Set the percentage of the surge/

trap amplitude to AC signal ampli-

tude (rms).

Operation Steps:

Press the [AC] key to set the instrument to AC output mode.

Refer to 4.2 Set the AC Output to set parameters related to basic Sine

waveform.

Turn the surge/trap function on.

Press the composite keys [Shift] + [I-set](Function) to enter function

menu interface.

Rotate the knob to select Surge Trap and press [Enter] key to confirm.

Rotate the knob to switch On and Off options. After selecting On, press

[Enter] to turn on the glitch/notch function.

Set the parameters of the surge/trap.

Rotate the knob to select Period and press [Enter] key to set the period

of the surge/trap.

Rotate the knob to select Width and press [Enter] key to set the width of

the surge/trap.

Rotate the knob to select Percent and press [Enter] key to set the per-

centage of the surge/trap.

Press [Esc] to exit the function menu setting.

Press [On/Off] key, and the power supply outputs the set surge/trap wave-

form. Press[On/Off] again to stop output.

10.0V

3.00A

50.0Hz

1Cycle

1.00mS

30.0%

Waveform Example

•

The trap diagram when Period=2Cycle, Width=1.00mS, and Percent=30% is

as follows:

Operation and Application

•

The surge diagram when Period=1Cycle, Width=0.4mS, and Percent=200%

is as follows:

•

The surge/trap function can only be used under the AC Mode.

•

IT-M7721L/IT-M7722L do not support surge/trap function.

4.8

Protection Function

4.8.1

Set the Over-Voltage Protection (rms)

The user can set the over-voltage protection point for the over-voltage protec-

tion (rms) function. When the output voltage reaches the over-voltage protection

point, the over-voltage protection (rms) will turn off the output. The function is

mainly used to protect the DUT connected during test to prevent it from damage

due to over-voltage. The OVP (rms) function is always enabled.

Operation and Application

Set the OVP(rms) point

Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

Rotate the knob to select OVP(rms) and press [Enter] key to confirm.

Rotate the knob to adjust the OVP(rms) point and press [Enter] key to

confirm.

Press [Esc] to exit the protection menu setting.

Clear OVP(rms) status

When over-voltage protection occurs, the instrument responds as follows:

•

The instrument output is turned off, and other keys (except the [Esc] key)

are locked.

•

The buzzer sounds intermittently three times: one long beep and two short

beeps.

•

The interface displays “OVPrms Occurred!!”;

•

Status register, the OVPrms status bit is set to 1.

To clear the over-voltage and return to normal operation, firstly remove the con-

ditions that caused the protection fault. Press [Esc] key (or send the command

PROTect:CLEar) to clear the protection status. The “OVPrms Occurred!!” dis-

played in front panel is cleared and the instrument exits OVP(rms) status.

4.8.2

Set the Over-Voltage Protection (peak)

The user can set the over-voltage protection point for the over-voltage protec-

tion (peak) function. When the output voltage reaches the over-voltage protec-

tion point, the over-voltage protection (peak) will turn off the output. The

function is mainly used to protect the DUT connected during test to prevent it

from damage due to over-voltage. The OVP (peak) function is always enabled.

Set the OVP(peak) point

Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

Rotate the knob to select OVP(peak) and press [Enter] key to confirm.

Rotate the knob to adjust the OVP(peak) point and press [Enter] key to

confirm.

Press [Esc] to exit the protection menu setting.

Clear OVP(peak) status

When over-voltage protection occurs, the instrument responds as follows:

Operation and Application

•

The instrument output is turned off, and other keys (except the [Esc] key)

are locked.

•

The buzzer sounds intermittently three times: one long beep and two short

beeps.

•

The interface displays “OVPpeak Occurred!!”;

•

Status register, the OVPpeak status bit is set to 1.

To clear the over-voltage and return to normal operation, firstly remove the con-

ditions that caused the protection fault. Press [Esc] key (or send the command

PROTect:CLEar) to clear the protection status. The “OVPpeak Occurred!!” dis-

played in front panel is cleared and the instrument exits OVP(peak) status.

4.8.3

Set the Under-Voltage Protection (rms)

The user can set the under-voltage protection limit for the under-voltage protec-

tion (rms) function. If the output voltage is lower than the under-voltage limit, the

under-voltage protection (rms) will turn off the output. The UVP (rms) functions

is always enabled.

Set the UVP(rms) limit

Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

Rotate the knob to select UVP(rms) and press [Enter] key to confirm.

Rotate the knob to adjust the UVP(rms) limit and press [Enter] key to

confirm.

Press [Esc] to exit the protection menu setting.

Clear UVP(rms) status

When under-voltage protection occurs, the instrument responds as follows:

•

The instrument output is turned off, and other keys (except the [Esc] key)

are locked.

•

The buzzer sounds intermittently three times: one long beep and two short

beeps.

•

The interface displays “UVPrms Occurred!!”;

•

Status register, the UVPrms status bit is set to 1.

To clear the under-voltage and return to normal operation, firstly remove the

conditions that caused the protection fault. Press [Esc] key (or send the com-

mand PROTect:CLEar) to clear the protection status. The “UVPrms Occurred!!”

displayed in front panel is cleared and the instrument exits UVP(rms) status.

Operation and Application

4.8.4

Set the Over-Current Protection (rms)

The user can set the over-current protection point for the over-current protection

(rms) function. When the output current reaches the over-current protection

point, the over-current protection (rms) will turn off the output. The function is

mainly used to protect the DUT connected during test to prevent it from damage

due to over-current. The OCP (rms) function is always enabled.

Set the OCP(rms) point

Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

Rotate the knob to select OCP(rms) and press [Enter] key to confirm.

Rotate the knob to adjust the OCP(rms) point and press [Enter] key to

confirm.

Press [Esc] to exit the protection menu setting.

Set the OCP delay

You can specify an OCP delay to prevent momentary output settings, DUT and

status changes from tripping the over-current protection. In most cases these

momentary conditions would not be considered an over-current protection fault,

and having an OCP condition disable the output when they occur would be a

nuisance. Specifying an OCP delay lets the OCP circuit ignore these momenta-

ry changes during the specified delay period. Once the OCP delay time has ex-

pired and the over-current condition persists, the output will shut down.

Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

Rotate the knob to select OCP Delay and press [Enter] key to confirm.

Rotate the knob to adjust the OCP delay time and press [Enter] key to

confirm.

Press [Esc] to exit the protection menu setting.

Clear OCP(rms) status

When over-current protection occurs, the instrument responds as follows:

•

The instrument output is turned off, and other keys (except the [Esc] key)

are locked.

•

The buzzer sounds intermittently three times: one long beep and two short

beeps.

•

The interface displays “OCPrms Occurred!!”;

•

Status register, the OCPrms status bit is set to 1.

Operation and Application

To clear the over-current and return to normal operation, firstly remove the con-

ditions that caused the protection fault. Press [Esc] key (or send the command

PROTect:CLEar) to clear the protection status. The “OCPrms Occurred!!” dis-

played in front panel is cleared and the instrument exits OCP status.

4.8.5

Set the Over-Current Protection (peak)

The user can set the over-current protection point for the over-current protection

(peak) function. When the output current reaches the over-current protection

point, the over-current protection (peak) will turn off the output. The function is

mainly used to protect the DUT connected during test to prevent it from damage

due to over-current. The OCP (peak) function is always enabled.

Set the OCP(peak) point

Press the composite keys [Shift] + [F-set](Protect) to enter Protect menu

interface.

Rotate the knob to select OCP(peak) and press [Enter] key to confirm.

Rotate the knob to adjust the OCP(peak) point and press [Enter] key to