Tonghui TH8101 User manual

TH8101 Program-controlled DC Load Manual
OPERATION MANUAL
TH8101
Program-controlled DC Load
Changzhou Tonghui Electronic Co., Ltd.
(VER1.0)

TH8101 Program-controlled DC Load Manual
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Chapter 1 General Information .........................................................................................................................1
1.1 Brief introduction .............................................................................................................................. 1
1.2 Specifications ....................................................................................................................................2
1.2.1 Main specifications:............................................................................................................... 2
1.2.2 Working environment............................................................................................................ 3
1.2.3 Working power supply.....................................................................................................3
1.2.4 Dimensions............................................................................................................................ 3
1.2.5 Weight.................................................................................................................................... 3
Chapter 2 Panel Description............................................................................................................................... 4
2.1 Front panel......................................................................................................................................... 4
2.2 Rear panel.......................................................................................................................................... 4
2.3 Keys................................................................................................................................................... 5
2.4 Basic information ..............................................................................................................................5
Chapter 3 Menu................................................................................................................................................... 7
3.1 General information........................................................................................................................... 7
3.2 Menu description............................................................................................................................... 7
3.3 Shortcut menu.................................................................................................................................. 10
3.4 Menu setup ...................................................................................................................................... 11
3.4.1 Load Setup........................................................................................................................... 11
3.4.2 System Config ..................................................................................................................... 13
3.4.3 Battery Test Set.................................................................................................................... 16
3.4.4 Tran Test Set........................................................................................................................ 16
3.4.5 Prog Test Set........................................................................................................................17
3.4.6 LED Test Set........................................................................................................................ 19
3.4.7 List Test Set ......................................................................................................................... 20
3.4.8 Clear File ............................................................................................................................. 22
3.4.9 Save File .............................................................................................................................. 22
3.4.10 Recall File............................................................................................................................ 22
3.4.11 Exit ...................................................................................................................................... 23
Chapter 4 Test Operation.................................................................................................................................. 24
4.1 Mode of constant current (CC)........................................................................................................ 24
4.2 Constant Voltage Mode (CV) .......................................................................................................... 24
4.3 Constant Power Mode (CP)............................................................................................................. 25
4.4 Constant Resistance Mode (CR)...................................................................................................... 25
4.5 Battery test mode............................................................................................................................. 26
4.6 Short-circuit Test Mode................................................................................................................... 27
4.7 Dynamic test mode..........................................................................................................................27
4.7.1 Continuous Mode (CONT).................................................................................................... 28
4.7.2 Pulse Mode (PULS)............................................................................................................. 28
4.7.3 Trigger Mode (TRIG)..........................................................................................................29
4.8 List test mode ................................................................................................................................... 29
4.9 OCP, OVP test .................................................................................................................................. 30
4.10 Protection Function......................................................................................................................... 31
4.10.1 Over-voltage protection.......................................................................................................31

TH8101 Program-controlled DC Load Manual
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4.10.2 Over-current protection ....................................................................................................... 31
4.10.3 Over-power protection......................................................................................................... 31
4.10.4 Alarm of input polarity in reverse ....................................................................................... 32
4.10.5 Over-heat protection............................................................................................................32
Chapter 5 Examples.......................................................................................................................................... 33
5.1 Battery test........................................................................................................................................ 33
5.1.1 Parameter............................................................................................................................. 33
5.1.2 Setting.................................................................................................................................. 33
5.1.3 Test ...................................................................................................................................... 34
5.2 Dynamic test.................................................................................................................................... 34
5.2.1 Parameters ........................................................................................................................... 34
5.2.2 Setup.................................................................................................................................... 35
5.2.3 Test ...................................................................................................................................... 36
5.3 List test ............................................................................................................................................ 36
5.3.1 Parameters ........................................................................................................................... 36
5.3.2 Setup.................................................................................................................................... 37
5.3.3 Test ...................................................................................................................................... 39
5.4 PROG Test...................................................................................................................................... 40
5.4.1 Parameter............................................................................................................................. 40
5.4.2 Setting.................................................................................................................................. 40
5.4.3 Test ...................................................................................................................................... 41
AppendixA Remote measurement and external trigger......................................................................... 43
A1 Remote measurement ...................................................................................................................... 43
A2 External trigger................................................................................................................................ 43
A3 Pin Configuration ............................................................................................................................ 43
Appendix B RS232C communication interface........................................................................................ 44
B1 Interface ............................................................................................................................................ 44
B2 Communication................................................................................................................................. 45
B3 RS485 multi-set communication....................................................................................................... 46
Declaration:
The descriptions contained in this manual may not cover all information about this instrument. Introductions to
the improvements of the instrument in performance, function, internal structure, outer appearance, accessories,
packing material, etc. are subject to change without notice. If you find any inconformity of this manual with our
instruments, please contact us for further consultation by the address listed on the cover.

TH8101 Program-controlled DC Load Manual
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Chapter 1 General Information
1.1Brief introduction
TH8101 program-controlled DC electronic load is designed based on a wide range of user feedback and
long-term professional experiences in electronic load area. The new design of the circuit uses fast AD and DA
to ensure high-speed and high-precision measurement. With resolution of 0.1mV / 0.1mA, TH8101 can make it
more effective to monitor the voltage and current changes in detail, so that the application area becomes wider
and the test results better. Highlight VFD displays clear and intuitive and menu & show context is easy to
understand and operate. Button is equipped with operating status indicator and the working status is very clear.
Completed test functions are very user-friendly, greatly improve production efficiency. Standard isolated RS232
interface can be easily used in computer communication or system integration applications.
CR-LED test mode can be an actual simulation of the characteristics of LED lights, fully simulate the
working principle of the diode by increasing break-over voltage settings of the diode, making the test voltage
and current achieve a normal stable value and avoiding the situation of unstable voltage and current or
generating oscillations under traditional constant resistance mode. It reflects the actual load situation of LED
driving power supply.
The new generation of electronic load can be widely used in production line test and research area of
LED driving power, switch power, power transformer, charger, storage battery industries, etc.
Features
CR-LED test mode, fully simulate LED power load characteristics
Highlight vacuum fluorescent VFD display
High display resolution: 0.1mV of Voltage and 0.1mA of current
OCP, OPP measurement functions to accurately capture the critical parameters
Complete CC, CV, CR, CP mode
Battery test mode can automatically record the discharge time and capacity
The fastest dynamic switching time of 0.025ms can effectively check the dynamic response of the
power supply
List test can flexibly combine the test mode and time to determine the test results
Remote measurement function, multiple sets of data storage
Intelligent fan control and a variety of protection measures
Standard case dimension, easy for racking

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1.2Specifications
1.2.1 Main specifications:
Model
TH8101
TH8103
TH8101A
TH8103A
TH8103B
Rated value
Input voltage
0~150V
0~500V
0~120V
Input current
0.1mA~30A
0.1mA~15A
0.1mA~60A
Input power
150W
300W
150W
300W
300W
Range
Accuracy
Resolution
Accuracy
Resolution
Accuracy
Resolution
Load accuracy
0-9.9999V
±（0.05%+0.03%FS）
0.1mV
±（0.05%+0.03%FS）
0.1mV
±（0.05%+0.03%FS）
0.1mV
10.000V-99.999V
±（0.05%+0.03%FS）
1mV
±（0.05%+0.03%FS）
1 mV
±（0.05%+0.03%FS）
1mV
100.00V-500.00V
±（0.05%+0.03%FS）
10mV
±（0.05%+0.03%FS）
10mV
±（0.05%+0.03%FS）
10mV
0-3A
±（0.05%+0.05%FS）
0.1 mA
±（0.05%+0.05%FS）
0.1 mA
±（0.05%+0.05%FS）
0.1 mA
0-30A/60A
±（0.05%+0.05%FS）
1 mA
±（0.05%+0.05%FS）
1 mA
±（0.05%+0.05%FS）
1 mA
Constant-volta
ge mode
1.5V-20V
±（0.05%+0.03%FS）
1mV
±（0.05%+0.03%FS）
1mV
±（0.05%+0.03%FS）
1mV
1.5V-150V/500V
±（0.05%+0.03%FS）
10mV
±（0.05%+0.03%FS）
10mV
±（0.05%+0.03%FS）
10mV
Constant-curr
ent mode
0-3A
±（0.05%+0.05%FS）
0.1 mA
±（0.05%+0.05%FS）
0.1 mA
±（0.05%+0.05%FS）
0.1 mA
0-30A/60A
±（0.05%+0.05%FS）
1 mA
±（0.05%+0.05%FS）
1mA
±（0.05%+0.05%FS）
1mA
Constant-resis
tance mode
(when the
input voltage
and current
value≥
10%FS)
0.05Ω-5Ω
±（0.2%+0.2%FS）
0.001Ω
±（0.2%+0.2%FS）
0.001Ω
±（0.2%+0.2%FS）
0.001Ω
0.5Ω-50Ω
±（0.1%+0.1%FS）
0.01Ω
±（0.1%+0.1%FS）
0.01Ω
±（0.1%+0.1%FS）
0.01Ω
5Ω-500Ω
±（0.1%+0.2%FS）
0.1Ω
±（0.1%+0.1%FS）
0.1Ω
±（0.1%+0.1%FS）
0.1Ω
500Ω-5KΩ
±（1%+1%FS）
1Ω
±（1%+1%FS）
1Ω
±（1%+1%FS）
1Ω
Constant-powe
r mode (when
the input
voltage and
current value
≥10%FS)
0-50W
±（0.1%+0.1%FS）
1 mW
±（0.1%+0.1%FS）
1 mW
±（0.1%+0.1%FS）
1 mW
0-150W
±（0.1%+0.15%FS）
1 0mW
±（0.1%+0.1%FS）
10 mW
±（0.1%+0.1%FS）
1 0mW
0-300W
±（0.1%+0.1%FS）
0.1W
±（0.1%+0.1%FS）
0.1 W
±（0.1%+0.1%FS）
0.1 W
Voltage test
accuracy
0-9.9999V
±（0.05%+0.03%FS）
0.1mV
±（0.05%+0.03%FS）
0.1mV
±（0.05%+0.03%FS）
0.1mV
10.000-99.999V
±（0.05%+0.03%FS）
1mV
±（0.05%+0.03%FS）
1mV
±（0.05%+0.03%FS）
1mV
100.00-150.00V/5
00.00V
±（0.05%+0.03%FS）
10mV
±（0.05%+0.03%FS）
10mV
±（0.05%+0.03%FS）
10mV
Current test
accuracy
0-9.9999A
±（0.05%+0.05%FS）
0.1 mA
±（0.05%+0.05%FS）
0.1 mA
±（0.05%+0.05%FS）
0.1 mA
10.000-30.000/60.
000A
±（0.05%+0.05%FS）
1 mA
±（0.05%+0.05%FS）
1mA
±（0.05%+0.05%FS）
1mA
Battery test
Input voltage= 0.8-150V/500V Max measurement capacity = 999A/H
Resolution=0.1mA Discharge time =1~60000sec

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Dynamic test
T1&T2（test time of A value or B value）： 0.025mS-999S Deviation＜2.5% + 0.01mS
Protective
range
＞Rated condition 5%
Impedance of
input terminal
≥200KΩ
Dimension
W*H*D 230mm*100mm*350mm
Weight
Power 150W:5.5 Kg Power 300W:6.5Kg
1.2.2 Working environment
Temperature: 0℃～40℃
Humidity: ≤90℅RH
Air pressure: 86～104Pa
1.2.3 Working power supply
220/110(1±10%)VAC, 50Hz (1±5%)
1.2.4 Dimensions
330mm×215mm×88mm
1.2.5 Weight
Approx. 5.5kg (150W)
6.5kg (300W)

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5
4
3
1
2
Chapter 2 Panel Description
2.1Front panel
No.
Name
Description
1
Display
Refer to 2.4
2
Knob
3
Input port: Red for positive pole, and
black for negative pole
Voltage polarity in reverse may result in
large current
4
Keys
Refer to 2.3
5
Power switch
2.2Rear panel

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1
No.
Name
Description
6, 7
Cooling window
Don’t block and keep good ventilation.
8
Remote measurement and trigger input
interface
Refer to Index A for port configuration
9
RS232C communication interface
10
AC 220V power input 
Fuse of 1Ainside
11
110V/220VAC input switch 
Please confirm the consistency of
switch position and input power.
2.3Keys
Number keys
1, 2, 3, 4, 5, 6, 7, 8, 9, 0
Load basic mode key
CC, CV, CW, CR
Start/Stop key
ON/OFF
Menu selection key
ESC,ENT, ▲, ▼, ▶,◀
The 2nd function key
Bat,LED,List,Tran,Prog,Short,Pause,S-Bat,S-Tran,S-List,S-LED,
S-Prog,System,Save,Recall, Menu, Local,Lock,←(B.S.), Trigger
The shift key
SHIFT
2.4Basic information

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No.
District
description
Description
Note
1
Load setup
parameters
I=：Constant current setup value
V=：Constant voltage setup value
P=：Constant power setup value
R=：Constant resistance setup value
W：Real-time power display
2
Load status
information
CC：Constant-current working of load
CV：Constant-voltage working of load
CP：Constant-power working of load
CR：Constant-resistance working of load
3
Load operation
function
ON：Load running
OFF：Load off
4
Load function
indication
Indicate the current working mode of
load
5
Real-time
voltage and
current
Display the real-time voltage and current
parameters of load
Other
Important alarm
information
Reverse Voltage!!! ：connection of
voltage pole in reverse
At the time of polarity connection
in reverse, load lost of control.
Danger!
Exceed Voltage!!!：Input voltage beyond
the range
Load off automatically at the time
of over-voltage
Over Hot!!!：Over-heat
Load off automatically at the time
of over-heat

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Chapter 3 Menu
3.1General information
The menu includes all the contents of setup of instrument and parameters with the same entry (Shift +
MENU), or enter submenu directly in shortcut mode.
In waiting status, press 【Shift】+【▼】 (Menu) key to menu function, and the available menus are
displayed. Use 【▲】and【▼】keys or knob to select the menu, and press 【ENT】key to the next-level
menu, or 【ESC】key to exit.
3.2Menu description
Main menu
1st submenu
Content or 2nd submenu
LOAD SETUP
MAX CURRENT
Input the current value and press【Ent】key to
confirm
MAX VOLTAGE
Input the voltage value and press【Ent】key to
confirm
MAX POWER
Input the power value and press【Ent】key to
confirm
ON VOLTAGE
OFF
Input the voltage value and press【Ent】key to
confirm
OFF VOLTAGE
OFF
Input the voltage value and press【Ent】key to
confirm
RISE RATE
Input the data and press【Ent】key to confirm
FALL RATE
Input the data and press【Ent】key to confirm
LOAD AUTO OFF
OFF
Input the data and press【Ent】key to confirm
REMOTE SENSE
ON
OFF
EXIT
Back to LOAD SETUP

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SYSTEM CONFIG
POWER ON CALL
OFF
Number 0～9 for file No.
KEY BEEP
ON
OFF
KEY LOCK
ON
OFF
KNOB LOCK
ON
OFF
TRIGGER SOURCE
MAN
EXT
BUS
RS-232 MODE
Single
Multiple
LOCALADDRESS
000～127
BAUD RATE
8 baud rates: 4800 9600 11520 12800
14400 19200 28800 38400
RESET SETTINGS
Esc
Enter
RESTORE CAL DATE
Esc
Enter
EXIT
Back to System Config
BATTERY TEST SET
DISCHARGE CURRENT
Input the current value and press【Ent】key to
confirm
MIN VOLTAGE
Input the voltage value and press【Ent】key to
confirm
METERING MODE
Press【Ent】key and then use【▲】【 ▼】to select
AH or WH
EXIT
Back to Battery Test Set
TRAN TEST SET
LEVELA
Press【Ent】key to input the load value（only in
current mode）
WIDTH A
Press【Ent】key to input the time（ms）
LEVEL B
Press【Ent】key to input the load value（only in
current mode）

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WIDTH B
Press【Ent】key to input the time（ms）
RISE RATE
Press【Ent】key to input the data
FALL RATE
Press【Ent】key to input the data
Tran Mode
(MODE SELECT)
CONT
PULS
TRIG
EXIT
Back to Tran Test Set
PROG TEST SET
PROG MODE
CONST-CURR
CONST-VOLT
START VALUE
Press【Ent】key to input the set value
END VALUE
Press【Ent】key to input the set value
STEP VALUE
Press【Ent】key to input the set value
STEP DELAY
Press【Ent】key to input the time (ms)
THRESHOLD TYPE
Drop
Break over voltage ( ΔV)
Minimum voltage (Vth)
THRESHOLD SET
Press【Ent】key to input the set value
COMPARE TYPE
OFF
InVolt
InCurr
InPower
LOW LIMIT
Press【Ent】key to input the set value
HIGH LIMIT
Press【Ent】key to input the set value
EXIT
Back to Scan Test Set
LED TEST SET
LED Vd
Press【Ent】key to input the set value
LED Rd
Press【Ent】key to input the set value
EXIT
Back to Led Test Set
LIST TEST SET
STEP NUMBER
OFF, number 01～15
STEP MODE
AUTO
TRIG
REPEAT
ON

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10
OFF
STEP 01～15
(press【Ent】key to enter into the
secondary submenu)
LIST LOAD
CONST-CURR
CONST-VOLT
CONST-POWER
CONST-RES
SHORT
OPEN
LEVEL
Press【Ent】key to input
the set value
DELAY
Press【Ent】key to input
the time
COMPARE
OFF
INVOLT
INCURR
INPOWER
LIMIT LOW
Press【Ent】key to input
the set value
LIMIT HIGH
Press【Ent】key to input
the set value
COPY TO NEST
Esc
Enter
EXIT
Back to step
CLEAR All File
Esc
Enter
SAVE FILE
Number 0 ~ 9
Press【Ent】key to save the setup file
RECALL FILE
Number 0 ~ 9
Press【Ent】key to load the setup file
EXIT
Press【Ent】key to exit the menu
3.3Shortcut menu
In waiting status, press SHIFT and then press the 2nd function corresponding to number key, to enter 1st
submenu:

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11
SHIFT + CONFIG
To enter submenu of system configuration
SHIFT + SETUP
To enter submenu of load setup
SHIFT + CALL
To enter submenu of file recall
SHIFT + SAVE
To enter submenu of file save
SHIFT+S-LIST
To enter submenu of list setup
SHIFT + S-BAT
To enter submenu of battery discharge test setup
SHIFT + S-TRAN
To enter submenu of dynamic test setup
SHIFT + S-PROG
To enter submenu of prog test setup
SHIFT + S-LED
To enter LED setup menu
SHIFT + Lock
Lock key, long press Lock key to unlock
3.4Menu setup
The main menu includes submenus of system configuration, dynamic parameter setup, file save/recall, etc, as
shown:
3.4.1 Load Setup
Load setup includes common parameters of electric load which decide the whole working characteristics of
electric load. Maximum power, maximum voltage and maximum current decide not only the maximum
protection limit of electric load, but also the working range of load.
Different load should be set in different operations.
If you want the modification of load setup to be still valid next time, press ESC key to quit after change the
setup.
Max Current
Maximum load current should be set before the test in order to ensure the safety of the test and
accuracy of current test.
Max. load current has three main functions:
a) To limit the constant current to be set less than the max. current;
b) In CV, CP, CR and short-circuit test modes, when load current is over max. current, the
instrument alarms and displays over-current protection (OC), and the over-current lasting
for long time will result in the automatic turning off of load.
c) When the set max. current is less than 3A (30A system) or 6A (60A system), load will work

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12
in the range of low current. Otherwise, it will work in the range of high current.
Example: If actual working current is less than 2.5A, select menu to Max Current, and press
【Ent】key to enter, then press【Ent】key again to input numbers. Press【2】【 .】【 5】. Afterwards,
press 【Ent】key to enter, and the default unit is A.
Max Voltage
It has three main functions to set max. input voltage:
a) To limit the constant voltage to be set less than the max. voltage;
b) When input voltage is over max. voltage, electric load will alarm and displays “Exceed
Voltage!!!”, and the load will automatically turn off.
c) When the set max. voltage is less than 20V (150V system) or 50V (500V system), load will
work in the range of low voltage. Otherwise, it will work in the range of high voltage.
Note: The set of max. voltage has the same method as that of max. current, and
the default unit is V.
Max Power
If the actual consumed power is over the max. power, the instrument will alarm and displays power
protection (OP) and the load will be probably automatically turned off.
Note: The set of max. power has the same method as that of max. current, and
the default unit is W.
On Voltage
Min. start voltage can be used in constant voltage, constant current, constant power and constant
resistance modes. It can also be used as the start voltage of automatic test in list mode and the input
voltage should be greater than 1.2 times the Min. start voltage. If minimum start voltage is turned on, the
load will be off when input voltage is less than 1.2 times the Min. start voltage. Once the input voltage is
over 1.2 times the Min. start voltage, load will automatically start.
Example: If the set min. start voltage is 1.25V, select menu to On Voltage, and press【Ent】key
to enter. And the original set value will be displayed (or in OFF status); then press【Ent】key to input
numbers. Press 【1】【 .】【 2】【 5】.Afterwards, press【Ent】key to enter and the default unit is V.
Note: If the set value is 0 or close to 0, “OFF”will be displayed, that is, the
function is turned off.
Off Voltage
Min. off voltage can be used in constant voltage, constant current, constant power and constant
resistance modes. If min. off voltage is turned on, after the load is started, when input voltage is less
than Off Voltage, the load will automatically turn off.
Note: The set of Off Voltage has the same method as On Voltage.
Note: If the set value is 0 or close to 0, “OFF”will be displayed, that is, the function is turned off.

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13
Rise Rate
To control the rise speed of load current, avoiding the measured power supply protection or damage
caused by excessive current rise. The unit is us and you can set the current range between 0.0001A-1.5A /
us.
Fall rate
To control the fall speed of load current, the unit is us and you can set the current range between
0.0001A-1.5A / us.
LoadAuto Off
Auto delay off can be used in constant voltage, constant current, constant power and constant
resistance modes. If auto delay off is turned on, the time will be counted in the unit of second after the
load starts. When the delay time reaches the set value ofAuto Off, the load will automatically turn off.
Note: The set of Auto Off has the same method as On Voltage, and the unit is
second (s). It ranges from 0 to 60000s.
Note: If the set value is 0 or close to 0, “OFF”will be displayed, that is, the function is turned off.
Remote Sense
In CV, CR, CP modes, voltage sampling accuracy will affect working accuracy of electric load. When
load consumes larger current, voltage fall will come into being on the connection line of power to be
tested and load. In order to make the test accurate, there is a remote measurement terminal on the rear
panel, through which user can measure the voltage of output terminal of the instrument to be tested.
RomoetSense = ON ：Remote test is turned on, and the instrument samples voltage through
remote measurement terminal on the rear panel.
RomoetSense = OFF ：Remote test is turned off, and the instrument samples voltage through
load input terminal on the front panel.
Press 【▲】and 【▼】keys or knob to turn on or off remote measurement function.
Note: Please refer to IndexAfor pin configuration of Sense interface on the rear panel.
Exit
In this menu, 【Ent】key is pressed to exit back to main menu, as pressing 【Esc】key.
3.4.2 System Config
The System Config menu includes some system parameters, such as private setup of the instrument,
communication function setup, etc. The menu modified is automatically saved and it will be valid in
next boot.

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14
All the submenus in System Config can be selected through 【▲】and 【▼】keys or knob.
Power-on Call
At the time of Power-on Call = OFF, the function is off. When number 0 to 9 is selected, the
corresponding file will be automatically loaded when the instrument is turned on. If the
corresponding file record is not saved (not existing), then the default parameters will be used.
Note：Please refer to “Save File” menu for how to save files.
Key Beep
The function is to set the beep at the time of pressing keys.
KeyBeep = ON：The sound of “DI” will be heard when keys are pressed.
KeyBeep = OFF：No sound will be heard when keys are pressed.
Key Lock
The function is to lock the keys. When the key is locked, only ON/OFF key and SHIFT key could be
used.
KeyLock = ON：“Lock”will be displayed on the bottom of the screen.
KeyLock = OFF：The keys are usable.
Knob Lock
The function is to select the knob function.
KnobLock = ON ：Knob is locked and it could not be turned.
KnobLock = OFF ：Knob lock is off, and knob is available.
Trigger Source
At the time of dynamic test and list test, trigger may be needed to select the next load. There are three
types of trigger: MAU, EXT and BUS.
TriggerSource = MAN: manual trigger, triggered by pressing the “TRIG” key on the panel;
TriggerSource = BUS : BUS trigger, triggered through program command on RS232C interface.
TriggerSource = EXT : exterior trigger, triggered through Sense terminal on the rear panel;
Note：Refer to Index Afor pin configuration of Sense interface on the rear panel.
Note：Refer to Index C for programmed communication command.

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RS-232 Mode
The RS232C communication interface can be used for the communication of multi units. One PC can
communicate with multi electric loads, which can be used for parallel of loads.
8-bit digit mode is applied for either multi-unit communication or single-unit communication.
However, multi-unit communication will recognize software address, and the single-unit
communication is not related to address.
Communication Mode = Single: Single-unit communication mode
Communication Mode = Multiple: Multi-unit communication mode
Note: Please refer to Index B fro RS232C interface communication.
LocalAddress
When multi units are communicating, different addresses must be distributed to each instrument in
the system. PC will exchange information with instruments according to their addresses. And in
single-unit communication mode, address is invalid.
The address ranges from 0 to 127 (hex 00H ~ 7FH).
Note: 【Ent】key can be pressed to enter numbers.
Note: There could not be the same address repeated in one system.
Baud Rate
The communication rate of data on RS232C interface should be consistent with the setup on PC.
The instrument has 8 baud rates: 4800 9600 11520 12800 14400 19200 28800 38400
Reset Settings
This operation is used to instrument the user settings (system configuration the Config and user
settings Setup) back to factory original state. Avoid lead instrument does not work properly due to the
user's settings reason in this menu, press【Ent】key recovery, then shut down and reboot, the system
will re-initialize.
Note：Do not do this instrument does not appear abnormal.
Restore Cal Data
This operation is used to restore the calibration data of the instrument to the factory default settings.
It is possible to return the instrument calibration data to the correct value when the instrument has a
measurement data deviation due to a strong interference or other impact of the outside. In this menu,
press the [Ent] key to restore, and then shut down and then reboot.
Exit
In this menu, 【Ent】key is pressed to exit back to main menu, as pressing【Esc】key.

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3.4.3 Battery Test Set
Please set parameters of battery test before starting the test.
Discharge Current
Battery discharge test works in constant current mode and the current is determined by the discharge
current settings.
Setting: After entering the submenu of Discharge Current, press the data and press【Ent】key to
confirm with unit ofA and press【ESC】key to quit.
Min Voltage
At the time of discharging, when input voltage is less than off voltage, the discharge test stops, and
discharge time and battery capacity will be displayed.
Setting: After entering the submenu of MinVoltage, press the data and press 【Ent】key to confirm
with unit of V.
Note：MinVoltage must be set, which could not be turned off as OffVoltage in load setup. If the set
value is too small or close to 0, battery test probably could not automatically ends.
Metering Mode
Press 【Ent】key to enter into the metering mode, use【▲】【 ▼】keys to select AH or WH display.
Exit
In this menu, 【Ent】key is pressed to exit back to main menu, as pressing【Esc】key.
3.4.4 Tran Test Set
Please set parameters of dynamic test before starting the dynamic test.
LevelA
It is to set value of point A. After entering Level A menu, input the value and the unit is A or V which
depends on the load type. Press【Esc】key to quit after finishing inputting.

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Width A
It is to set width of point A. After entering Width A menu, input the value and press【Ent】key to
confirm with the unit of ms.
Level B
It is to set value of point B. After entering Level B menu, input the value and press【Ent】key to
confirm with the unit ofA or V which depends on the load type.
Width B
It is to set width of point B. After entering Width B menu, input the value and press【Ent】key to
confirm with the unit of ms.
Rise Rate
Input the value and press【Ent】key to confirm. To control the rise speed of load current, avoiding the
measured power supply protection or damage caused by excessive current rise. The unit is us and you
can set the current range between 0.0001A-1.5A/ us.
Fall rate
Input the value and press【Ent】key to confirm. To control the fall speed of load current, the unit is us
and you can set the current range between 0.0001A-1.5A / us.
Mode Selection
In dynamic test mode, load has three control modes in the switch of pointA and point B:
CONT (continuous mode): Load will automatically switch after delaying corresponding time;
TRIG (trigger mode): The width doesn’t work, and load switches in the effect of trigger signal.
PULS (pulse mode): Load works with A value. After the trigger, it switches to value B, and switches
to valueA again after delaying width B;
Please press【▲】and【▼】keys or knob to select dynamic mode.
Note: Please refer to 4.7 for dynamic modes.
Exit
In this menu, 【Ent】key is pressed to exit back to main menu, as pressing 【Esc】key.
3.4.5 Prog Test Set
You can set the start and end value of the scan and the step value to observe the working situation of
products in a certain range in the process of scanning. Also, the critical value of the parameters can be
captured at a sudden- changeable signal, such as protective current, break-over voltage and so on.