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ARRAY 3751A User Manual
ARRAY 3751A 2kW DC Programmable Electronic Load
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Safety Instruction
Chapter I General Introduction
1.1 Function Features
1.2 Front Panel
1.3 Rear Panel
1.4 Keypad Function
There are four types of keys: function keys, number keys, alternative function keys and direction keys on the keypad. On the alternative function compound key, the black fond is the first function and the blue fond is the alternative function. For exa...
Table 1-1 Key Explanation:
1.5 Annunciators
Description of the Main Menu
1.6.1 Main Menu List
1.6.3 Transient Operation Menu
In basic mode, press dynamic / key to enter the corresponding transient operation menu. The transient operation menu is as follows:
1.6.4 List Operation Menu
1.6.5 Basic Mode Menu & LCD Information
1.7 Remote Programming
Chapter II Functions and Features
This chapter will mainly introduce the functions and features of the load. After reading this chapter, you will have a better understanding of ARRAY 375XA Electronic Load.
2.1 Local & Remote Control
ARRAY 375XA Electronic Load can be controlled via the keypad and the knob in the front panel, or via the remote controller by the remote interface. If the load is needed to be controlled via the front panel, it has to be in local control status. The l...
Under remote control status, all the operations of the keypads and knob (except / key) are invalid. All operations on the load are controlled by remote controller. After receiving the return commands: SYSTem:LOCal, the load will return to local contro...
2.2 Main Functions
2.3 Basic Test Functions
The set value of the load will be effective immediately when the load is turned on. If the input set value exceeds the allowed range, it will be automatically limited at the maximum value or the minimum value.
2.3.1 CC Test
2.3.1.1 Current Setting Range
The setting ranges for the load are listed as follows:
For example: When the load is switched from CCL to CCH, the input of the load will be off automatically. Also of note is that the current set level may change with the current set mode and the changed value is the current value in current mode. For ex...
2.3.1.2 Immediate Current Level
2.3.1.3 Triggered Current Level
2.3.1.4 Transient Current Level
2.3.2 CV test
MODE CVL|CVH
2.3.2.1 Voltage Setting Range
The setting ranges of the voltage for the load are listed as follows
2.3.2.2 Immediate Voltage Level
2.3.2.3 Triggered Voltage Level
2.3.2.4 Transient Voltage Level
2.3.3 CR Test
MODE CRL | CRH
2.3.3.1 Resistance Setting Range
2.3.3.2 Immediate Resistance Level
2.3.3.3 Triggered Resistance Level
MODE CP
2.3.4.1 Power Setting Range
2.3.4.2 Immediate Power Level
2.3.4.3 Triggered Power Level
2.3.5 CC+CV Test
When CC+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no m...
2.3.6 CR+CV Test
When CR+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no ...
2.3.7 CP+CV Test
When CP+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no ...
2.4.1 Continuous Transient Operation
2.4.2 Pulsed Transient Operation
2.4.3 Toggled Transient Operation
2.5 List Operation
2.6 Triggered Operation
2.7 Input Control
2.7.1 ON/OFF of ELoad Input
2.7.2 Von Point/Von Latch
2.7.3 Current Limit Function in CV Mode
2.7.4 Current Rising Rate
2.7.5 Current Falling Rate
2.8 Measurement Function
2.9 Saving and Recalling
The load has EEPROM memory, which can be used to save various parameters, such as modes, input status, current, voltage, resistance, transient settings, protection levels, etc. The 375XA electronic load can save 10 groups of parameters. All parameters...
2.10 Read Remote Program Errors
The Err annunciator at the upper right corner on the screen will display the error information when the remote programming errors occur. The error codes are shown as follows:
2.11 Status Report
2.12 Protect and Alarm Function
Load has the following alarm functions:
2.12.1 Clearing Latched Function
2.12.2 Overvoltage
2.12.3 Overcurrent
2.12.4 Overpower
2.12.5 Overtemperature
2.12.6 Reverse Polarity
3.1 Initial Check
3.2 Environment/Installation Location
3.3 PowerOn/Self-check
If the unit fails to start up properly or does not turn on, please contact the supplier.
3.5 Connection on the Front Panel
3.6 Wiring
Description: The rear panel input terminals accept up to M8-sized crimped terminal and equipped with a pairs of lugs.
Procedures:
Turn off the power;
Turn off the DUT power;
Connect the load wires to the input terminal:
Connect the positive (+) terminal on the load module to the high potential output of the DUT.
Connect the negative (-) terminal on the load module to the low potential output of the DUT.
Wiring
Wire Gauge (AWG): Before connecting the unit to the power source, the wire gauge must be taken into account. The load wires must be large enough to resist the overheating when a short-circuit condition occurs as well as to maintain a good regulation. ...
Load wiring AWG table:
Load Line Inductance: When using 375XA, voltage drop and voltage generated due to load line inductance and current change must be taken into consideration. Extreme changes in voltage may exceed the minimum or maximum voltage limits, which may damage t...
To determine the voltage generated, the following equation can be used.
E=LÃ(âI/âT)
E=voltage generated
L=load line inductance
âI=change of current(A)
âT=time(us)
Load line inductance (L) can be approximated as 1uH/meter of wire. (âI/âT) is the slew rate in A/us
The diagram above shows how changes in current can affect voltage.
Load line inductance can be reduced in two ways:
Ensure load wires being as short as possible;
Twist the positive and negative load wires together.
Current change can be limited by limiting the slew rate or response speed when switching in CR and CC mode.
Load Wire Connections
The input terminal of the load is on the rear panel. Strictly follow the procedure below for all the load connections to ensure the safety of the personal and the instrument. Ensure the polarity is correct before proceeding with any connection. Ensure...
Using the wrong polarity, when the reverse voltage is greater than -.3V, the reverse voltage alarm function will be tripped.
Do not touch any of the input terminals when the unit is on.
Connecting the input terminal to the wrong polarity can damage the DUT and load.
Chapter IV Local Operation
4.1 Local Control
4.2 Main Operation of the Front Panel
4.3 Connecting to the Power Supply
4.4 ON/OFF of the Eload Input
4.5 Basic Operation
4.5.1 CC Mode
4.5.2 CV Mode
4.5.3 CR Mode
4.5.4 CP Mode
4.6 +CV Mode
4.6.1 CC+CV Mode
4.6.2 CR+CV Mode
4.6.3 CP+CV Mode
4.7.1 Continuous Transient Operation
4.7.2 Pulsed Transient Operation
4.7.3 Toggle Transient Operation
4.8 List Operation
4.8.1 List Editing
4.8.2 Starting/Stopping the List
4.9 Saving and Recalling
4.10 Checking and Clearing Protection Setting
4.11 Trigger Operation
4.12 Main Menu of the Eload
4.12.1 Buzzer
4.12.2 Encoder
Example: Encoder disabled. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
Step 2: Select Encoder via/, / keys or /, / keys and press / key to confirm;
4.12.3 Trigger
Example: Encoder disabled. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
Refer to <<375XA Calibration Manual>> for details.
4.12.5 Information
Example: Check device information. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
/
Step 4: Press dynamic / key to exit the main menu.
4.12.6 Safety Code
Change the safety code. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
/
Step 4: Press dynamic / key to exit the main menu.
Example 1: Change the safety code to 123456. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
Example 2: Cancel the safety code. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
4.12.7 Date
Example: Check date information. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
4.12.8 Time
Example: Check time information. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
4.12.9 Language
The language of the system can be switched between English and Chinese. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
Step 3: The following diagram will be displayed;
System Default
This menu will help to restore the factory default settings. The detailed procedures are as below:
Step 1: Press dynamic / key to enter into the main menu;
Step 3: In the pop-up dialog, If Yes is chosen, it will restore the factory default settings; if No is not chosen, it will not restore the factory default settings;
Step 4: Press dynamic / key to exit the main menu.
Chapter V Remote Programming Operation
5.1 Communication Interface
5.1.1 RS232
/
USB
USB interface is the standard configuration of the load. Correctly connect the load and the PC via the USB interface. Select USB interface in âI/Oconfigâ menu. Input the SCPI commands in the PC software interface to operate the load.
5.1.3 GPIB
/
Step 7: Press dynamic / key to exit the COM menu;
Step 4: Press dynamic / key to exit the GPIB menu;
5.3 Sending Remote Setting Commands
5.4 Returning Data
5.5 Remote Programming Commands
5.5.1 Basic Test Mode
5.5.2 Transient Level
5.5.3 Programmable Current Protection
5.7 CV Mode Example
5.8 CR Mode Example
5.9 Continuous Transient Operation Example
5.10 Pulsed Transient Operation Example
/
/
Fig.1
/
/
/
/
Fig.2
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Contents
Table of Contents
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USER’S MANUAL
375X SERIES ELECTRONIC LOAD
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File type: PDF
File name: 38256225_3751a.pdf
File size: 4.45 MB
File Language: English
Pages: 120
Author: ARRAY
File created: 2017-02-15
Published: 2023-04-09
Updated: 2023-04-09
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Other documents for ARRAY 3751A
The following documents are available:
User Manual
Manual - (English)
Read Online
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Download pdf
Photos
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Specifications
Brand:
ARRAY
Model: 3751A
Category:
Tools - Home Improvement
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Table of Contents
×
Safety Instruction
6
Chapter I General Introduction
8
1.1 Function Features
8
1.2 Front Panel
9
1.3 Rear Panel
10
1.4 Keypad Function
10
There are four types of keys: function keys, number keys, alternative function keys and direction keys on the keypad. On the alternative function compound key, the black fond is the first function and the blue fond is the alternative function. For exa...
10
Table 1-1 Key Explanation:
11
1.5 Annunciators
12
Description of the Main Menu
13
1.6.1 Main Menu List
13
1.6.3 Transient Operation Menu
15
In basic mode, press dynamic / key to enter the corresponding transient operation menu. The transient operation menu is as follows:
15
1.6.4 List Operation Menu
16
1.6.5 Basic Mode Menu & LCD Information
18
1.7 Remote Programming
25
Chapter II Functions and Features
26
This chapter will mainly introduce the functions and features of the load. After reading this chapter, you will have a better understanding of ARRAY 375XA Electronic Load.
26
2.1 Local & Remote Control
26
ARRAY 375XA Electronic Load can be controlled via the keypad and the knob in the front panel, or via the remote controller by the remote interface. If the load is needed to be controlled via the front panel, it has to be in local control status. The l...
26
Under remote control status, all the operations of the keypads and knob (except / key) are invalid. All operations on the load are controlled by remote controller. After receiving the return commands: SYSTem:LOCal, the load will return to local contro...
26
2.2 Main Functions
26
2.3 Basic Test Functions
27
The set value of the load will be effective immediately when the load is turned on. If the input set value exceeds the allowed range, it will be automatically limited at the maximum value or the minimum value.
27
2.3.1 CC Test
27
2.3.1.1 Current Setting Range
28
The setting ranges for the load are listed as follows:
28
For example: When the load is switched from CCL to CCH, the input of the load will be off automatically. Also of note is that the current set level may change with the current set mode and the changed value is the current value in current mode. For ex...
28
2.3.1.2 Immediate Current Level
28
2.3.1.3 Triggered Current Level
28
2.3.1.4 Transient Current Level
29
2.3.2 CV test
29
MODE CVL|CVH
30
2.3.2.1 Voltage Setting Range
30
The setting ranges of the voltage for the load are listed as follows
30
2.3.2.2 Immediate Voltage Level
30
2.3.2.3 Triggered Voltage Level
31
2.3.2.4 Transient Voltage Level
31
2.3.3 CR Test
31
MODE CRL | CRH
31
2.3.3.1 Resistance Setting Range
32
2.3.3.2 Immediate Resistance Level
32
2.3.3.3 Triggered Resistance Level
32
MODE CP
33
2.3.4.1 Power Setting Range
34
2.3.4.2 Immediate Power Level
34
2.3.4.3 Triggered Power Level
34
2.3.5 CC+CV Test
35
When CC+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no m...
35
2.3.6 CR+CV Test
35
When CR+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no ...
35
2.3.7 CP+CV Test
36
When CP+CV mode is enabled, if the input voltage is more than the limit voltage, no matter how the input current is changed ,the Eload will always enter the voltage at the limit of the voltage. If the input voltage is less than the limit voltage, no ...
36
2.4.1 Continuous Transient Operation
37
2.4.2 Pulsed Transient Operation
39
2.4.3 Toggled Transient Operation
41
2.5 List Operation
43
2.6 Triggered Operation
44
2.7 Input Control
45
2.7.1 ON/OFF of ELoad Input
45
2.7.2 Von Point/Von Latch
45
2.7.3 Current Limit Function in CV Mode
46
2.7.4 Current Rising Rate
47
2.7.5 Current Falling Rate
47
2.8 Measurement Function
48
2.9 Saving and Recalling
48
The load has EEPROM memory, which can be used to save various parameters, such as modes, input status, current, voltage, resistance, transient settings, protection levels, etc. The 375XA electronic load can save 10 groups of parameters. All parameters...
48
2.10 Read Remote Program Errors
50
The Err annunciator at the upper right corner on the screen will display the error information when the remote programming errors occur. The error codes are shown as follows:
50
2.11 Status Report
50
2.12 Protect and Alarm Function
50
Load has the following alarm functions:
50
2.12.1 Clearing Latched Function
51
2.12.2 Overvoltage
51
2.12.3 Overcurrent
51
2.12.4 Overpower
52
2.12.5 Overtemperature
52
2.12.6 Reverse Polarity
53
3.1 Initial Check
54
3.2 Environment/Installation Location
54
3.3 PowerOn/Self-check
55
If the unit fails to start up properly or does not turn on, please contact the supplier.
55
3.5 Connection on the Front Panel
58
3.6 Wiring
59
Description: The rear panel input terminals accept up to M8-sized crimped terminal and equipped with a pairs of lugs.
59
Procedures:
59
Turn off the power;
59
Turn off the DUT power;
59
Connect the load wires to the input terminal:
59
Connect the positive (+) terminal on the load module to the high potential output of the DUT.
59
Connect the negative (-) terminal on the load module to the low potential output of the DUT.
59
Wiring
59
Wire Gauge (AWG): Before connecting the unit to the power source, the wire gauge must be taken into account. The load wires must be large enough to resist the overheating when a short-circuit condition occurs as well as to maintain a good regulation. ...
59
Load wiring AWG table:
59
Load Line Inductance: When using 375XA, voltage drop and voltage generated due to load line inductance and current change must be taken into consideration. Extreme changes in voltage may exceed the minimum or maximum voltage limits, which may damage t...
60
To determine the voltage generated, the following equation can be used.
60
E=LÃ(âI/âT)
60
E=voltage generated
60
L=load line inductance
60
âI=change of current(A)
60
âT=time(us)
60
Load line inductance (L) can be approximated as 1uH/meter of wire. (âI/âT) is the slew rate in A/us
60
The diagram above shows how changes in current can affect voltage.
61
Load line inductance can be reduced in two ways:
61
Ensure load wires being as short as possible;
61
Twist the positive and negative load wires together.
61
Current change can be limited by limiting the slew rate or response speed when switching in CR and CC mode.
61
Load Wire Connections
61
The input terminal of the load is on the rear panel. Strictly follow the procedure below for all the load connections to ensure the safety of the personal and the instrument. Ensure the polarity is correct before proceeding with any connection. Ensure...
61
Using the wrong polarity, when the reverse voltage is greater than -.3V, the reverse voltage alarm function will be tripped.
62
Do not touch any of the input terminals when the unit is on.
62
Connecting the input terminal to the wrong polarity can damage the DUT and load.
62
Chapter IV Local Operation
64
4.1 Local Control
64
4.2 Main Operation of the Front Panel
64
4.3 Connecting to the Power Supply
65
4.4 ON/OFF of the Eload Input
65
4.5 Basic Operation
65
4.5.1 CC Mode
66
4.5.2 CV Mode
68
4.5.3 CR Mode
70
4.5.4 CP Mode
72
4.6 +CV Mode
74
4.6.1 CC+CV Mode
74
4.6.2 CR+CV Mode
75
4.6.3 CP+CV Mode
76
4.7.1 Continuous Transient Operation
77
4.7.2 Pulsed Transient Operation
79
4.7.3 Toggle Transient Operation
81
4.8 List Operation
83
4.8.1 List Editing
84
4.8.2 Starting/Stopping the List
87
4.9 Saving and Recalling
88
4.10 Checking and Clearing Protection Setting
90
4.11 Trigger Operation
91
4.12 Main Menu of the Eload
91
4.12.1 Buzzer
92
4.12.2 Encoder
92
Example: Encoder disabled. The detailed procedures are as below:
92
Step 1: Press dynamic / key to enter into the main menu;
92
Step 2: Select Encoder via/, / keys or /, / keys and press / key to confirm;
92
4.12.3 Trigger
93
Example: Encoder disabled. The detailed procedures are as below:
93
Step 1: Press dynamic / key to enter into the main menu;
93
Refer to <<375XA Calibration Manual>> for details.
93
4.12.5 Information
93
Example: Check device information. The detailed procedures are as below:
93
Step 1: Press dynamic / key to enter into the main menu;
93
/
94
Step 4: Press dynamic / key to exit the main menu.
94
4.12.6 Safety Code
94
Change the safety code. The detailed procedures are as below:
94
Step 1: Press dynamic / key to enter into the main menu;
94
/
94
Step 4: Press dynamic / key to exit the main menu.
94
Example 1: Change the safety code to 123456. The detailed procedures are as below:
94
Step 1: Press dynamic / key to enter into the main menu;
94
Example 2: Cancel the safety code. The detailed procedures are as below:
95
Step 1: Press dynamic / key to enter into the main menu;
95
4.12.7 Date
95
Example: Check date information. The detailed procedures are as below:
95
Step 1: Press dynamic / key to enter into the main menu;
95
4.12.8 Time
96
Example: Check time information. The detailed procedures are as below:
96
Step 1: Press dynamic / key to enter into the main menu;
96
4.12.9 Language
96
The language of the system can be switched between English and Chinese. The detailed procedures are as below:
96
Step 1: Press dynamic / key to enter into the main menu;
96
Step 3: The following diagram will be displayed;
97
System Default
97
This menu will help to restore the factory default settings. The detailed procedures are as below:
97
Step 1: Press dynamic / key to enter into the main menu;
97
Step 3: In the pop-up dialog, If Yes is chosen, it will restore the factory default settings; if No is not chosen, it will not restore the factory default settings;
97
Step 4: Press dynamic / key to exit the main menu.
97
Chapter V Remote Programming Operation
98
5.1 Communication Interface
98
5.1.1 RS232
98
/
98
USB
98
USB interface is the standard configuration of the load. Correctly connect the load and the PC via the USB interface. Select USB interface in âI/Oconfigâ menu. Input the SCPI commands in the PC software interface to operate the load.
98
5.1.3 GPIB
99
/
99
Step 7: Press dynamic / key to exit the COM menu;
101
Step 4: Press dynamic / key to exit the GPIB menu;
101
5.3 Sending Remote Setting Commands
102
5.4 Returning Data
102
5.5 Remote Programming Commands
102
5.5.1 Basic Test Mode
103
5.5.2 Transient Level
103
5.5.3 Programmable Current Protection
103
5.7 CV Mode Example
104
5.8 CR Mode Example
104
5.9 Continuous Transient Operation Example
104
5.10 Pulsed Transient Operation Example
105
/
114
/
114
Fig.1
114
/
115
/
115
/
116
/
116
Fig.2
116
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