Tonghui TH8400 Series User manual

O OP PE ER RA AT TI IO ON N M MA AN NU UA AL L
TH8400 Series
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TH8400 Series Operation Manual
1
Contents
Chapter 1 Overview......................................................................................................................3
1.1 Introduction..................................................................................................................3
1.2 Condition of Use..........................................................................................................3
1.3 Weight and Dimension.................................................................................................4
1.4 Safety Requirement......................................................................................................4
1.5 Electromagnetic Compatibility ....................................................................................5
Chapter 2 Panels...........................................................................................................................2
2.1 Introduction to front panel ...........................................................................................2
2.2 Introduction to rear panel.............................................................................................3
2.3 Introduction to display zone.........................................................................................3
2.4 Summary of the Displayed Page..................................................................................4
2.4.1 DISP (Function Display Page) .....................................................................4
2.4.2 SETUP (System Settings Page)....................................................................5
Chapter 3 Function Setting and Use.............................................................................................6
3.1 Static Mode (Static)......................................................................................................6
3.1.1 Constant Current(CC) ..................................................................................7
3.1.2 Constant Voltage(CV)..................................................................................7
3.1.3 Constant Resistance(CR)..............................................................................8
3.1.4 Constant Power(CP).....................................................................................8
3.2 Dynamic Mode (Dynamic) ..........................................................................................8
3.3 Sequential Operation (List)..........................................................................................9
3.4 CR-LED .....................................................................................................................10
3.5 Battery Test (Battery).................................................................................................11
3.6 Time Test(Timing)......................................................................................................12
3.7 Overcurrent Protection Test(OCPT)...........................................................................13
3.8 Over Voltage Protection Test(OVPT).........................................................................14
3.9 OPPT..........................................................................................................................15
3.10 Load Effect.................................................................................................................15
3.11 Sweep.........................................................................................................................17
3.12 Automatic Test (AUTO).............................................................................................18
Chapter 4 System Setup..............................................................................................................20
4.1 SYSTEM Setup (System) ..........................................................................................20
4.1.1 Language....................................................................................................20
4.1.2 Key Sound..................................................................................................20
4.1.3 Remote Compensation...............................................................................20
4.1.4 Start-up Parameters ....................................................................................21
4.1.5 Display Mode.............................................................................................21
4.1.6 Source under Test.......................................................................................22
4.1.7 External Analog..........................................................................................22
4.2 Load Unload (Von/Voff).............................................................................................22
4.3 Security Setting (Protect)...........................................................................................23
4.4 File Store....................................................................................................................24

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4.4.1 Internal File Save .......................................................................................24
4.4.2 External File Call .......................................................................................25
4.4.3 Save Sampling Parameters.........................................................................25
4.5 Communication Setup (RS232) .................................................................................26
Chapter 5 Other Functions..........................................................................................................27
5.1 Short Circuit Test Function........................................................................................27
5.2 USB Interface Function..............................................................................................27
5.2.1 Copy Screen...............................................................................................27
5.2.2 STA File Save.............................................................................................27
5.2.3 CSV File Save............................................................................................27
Chapter 6 Interface and Communication....................................................................................28
6.1 Remote Control Interface...........................................................................................28
6.1.1 RS232 Interface Descriptions.....................................................................28
6.1.2 Communicate with a Computer..................................................................29
6.2 Command Specification.............................................................................................31
6.2.1 Command Structure....................................................................................31
6.2.2 Symbol Conventions and Definitions.........................................................32
6.3 Command Reference..................................................................................................32
6.3.1 Common Commands..................................................................................32
6.3.2 Instrument Commands ...............................................................................33
Chapter 7 Handler.......................................................................................................................48
7.1 Basic Information.......................................................................................................48
7.2 Operation Instruction .................................................................................................48
7.2.1 ON..............................................................................................................48
7.2.2 TRIG ..........................................................................................................49
7.2.3 VF/EXT-PROG..........................................................................................49
7.2.4 PASS/FAIL.................................................................................................49
Chapter 8 Technical Specifications ............................................................................................50
Chapter 9 Warranty.....................................................................................................................52
Chapter 10 Appendix....................................................................................................................53

TH8400 Series Operation Manual
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Chapter 1 Overview
Thank you for purchasing and using our company's products. Before you use this instrument, please
confirm according to the "Complete set and warranty" in the last chapter of the manual. If there is
any discrepancy, please contact our company as soon as possible to protect your rights and interests.
1.1 Introduction
TH8400 series is a DC electronic load with high precision, high intelligence and easy operation.
This series of instruments integrates a variety of test functions, has excellent performance, and
adopts a liquid crystal screen display, which is clear and easy to operate. It can meet the needs of
rapid operation on the production site and the needs of high accuracy and stability in the
laboratory. .
The special functions and advantages of the instrument are as follows:
500kHz synchronous sampling, 0.1mA, 1mV resolution
Voltage/current ripple, peak, peak and valley measurement
A dozen measurement functions
Support remote compensation function
Support file storage function
480X272 pixels, 24-bit color, 4.3-inch color TFT LCD screen, used to set test conditions and
display of measurement results, etc.
Number keyboard and knob operation
High accuracy and high resolution
Low ripple and low noise
Intelligent fan control, save energy and reduce noise
Software control and detection can be done by computer
Dual-range programmable voltage and current load
1.2 Condition of Use
Power
Power supply voltage: 220V (1±10%)
Power frequency: 50Hz/60Hz (1±5%)
Power consumption: <50VA
Ambient temperature and humidity
Normal working temperature: 0℃～40℃, humidity: <90%RH
Reference working temperature: 20℃±8 ℃, humidity: <80%RH
Transportation environment temperature: 0℃～55℃, humidity: 93%RH
Preheat

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Warm-up time after starting: ≥ 20 minutes
Points forAttention
(1) Please do not use it in bad environments such as dust, vibration, direct sunlight, corrosive gas,
etc.
(2) The instrument will not be used for a long time, please store it in the original packaging box or
similar box in a ventilated room with a temperature of 5℃～40℃and a relative humidity of not
more than 85%RH. The air should not contain a corrosion measuring instrument Harmful impurities,
and direct sunlight should be avoided.
(3) This instrument has been carefully designed to reduce the noise interference caused by the AC
power input, but it should still be used in a low noise environment as much as possible. If it cannot
be avoided, please install a power filter.
(4) There is a cooling fan at the rear of the instrument, and there are cooling vents on the left and
right to avoid the internal temperature rise affecting the accuracy. Please ensure that the instrument
is in a well-ventilated state.
(5) Do not switch the instrument frequently to avoid the loss of stored data.
1.3 Weight and Dimension
Dimension (W*H*D): 350mm*122mm*425mm
Weight: TH8412, TH8412A, TH8402 round 4.8kg,
TH8401, TH8411 around 3kg
1.4 Safety Requirement
This instrument is a Class I safety instrument
Insulation Resistance
Under the reference working condition, the insulation resistance between the power terminal and the
shell is not less than 50M;
Under humid and hot transportation conditions, the insulation resistance between the power terminal
and the housing is not less than 2M;
Insulation Strength
Under the reference working condition, the AC voltage between the power terminal and the housing
can withstand the rated voltage of 1.5kV and the frequency of 50Hz for 1 minute without
breakdown or arcing.
Leakage Current
Leakage current is not greater than 3.5mA.

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1.5 Electromagnetic Compatibility
The power supply transient sensitivity is in accordance with the requirements of GB6833.4.
Conducted sensitivity is in accordance with the requirements of GB6833.6.
Radiated interference is in accordance with the requirements of GB6833.10.

TH8400 Series Operation Manual
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Chapter 2 Panels
The content of this chapter is only a brief description. For specific operation and detailed
explanation, please refer to the corresponding content in Chapter 3.
2.1 Introduction to front panel
Figure 2-1 shows the front panel of TH8400.
Figure 2-1 Front panel
1
USB Interface
U Disk Interface
2
Trade Model
Display trademark, model and load parameters
3
LCD
480*272dot matrix LCD display, showing all measurement parameters, status,
measurement results, etc.
4
Left and right arrow keys
Used to move the cursor or turn pages
5
Knob
for moving cursor up and down and value adjustment
6
Numeric keypad
for entering values
7
[ON/OFF] Key
Load start or stop button
8
[DISP] Key
Enter the function setting page
9
[SETUP] Key
Enter the system settings page
10
[SHORT] Key
Shortcut key for short circuit test
11
[LOCK/LOCAL] Key
Used to lock the key to switch the remote control. When the key is on, the
keyboard is locked and the instrument can only be controlled remotely
12
[TRIG] Key
Trigger button for specific functions
13
[ENTER] Key
Confirmation button for numerical setting
14
(POWER) 
Turn on or off 220V mains power, turn on the power when in the pressed
position; turn off the power when in the ejected position
15
SOFTKETs
The functions of the six keys in this part are not fixed, and correspond to the

TH8400 Series Operation Manual
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functions of the soft key menu bar in the corresponding LCD screen.
16
INPUT
Load input port
17
Remote Compensation
(SENSE)
The instrument selects the measurement port for remote measurement
Table 2-1
2.2 Introduction to rear panel
Figure 2-2 shows the rear panel of TH8400.
Figure 2-2 Rear panel
1
Three-wire power socket
for connecting 220V/50HZ AC power supply
2
Current monitoring terminal
(I-MONITOR)
Used for current detection on the rear panel, output
(0-10V)
3
HANDLER
Instrument interface signal input and output port
4
RS-232C
Serial communication interface
5
Nameplate
Record production date, model, batch number,
manufacturer, etc.
Table 2-2
2.3 Introduction to display zone
TH8400 DisplayArea as shown in 2-3

TH8400 Series Operation Manual
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(1) Title bar: displays the name of the current page.
(2) Information prompt area: real-time display of load prompt information or error information.
(3) Working mode display area: displays the working mode during static operation.
(4) Parameter setting area: used for parameter setting under the current function.
(5) Sampling display area: real-time display of various test results sampled.
(6) Status information area: display the current range of the load, short circuit, power part
temperature and other working status.
(7) Software menu area: corresponds to the soft keys on the front panel, and corresponds to various
operations according to the menu information.
2.4 Summary of the Displayed Page
2.4.1 DISP(Function Display Page)
Static operation (Const): Set CC, CV, CR and CP four basic load functions.
Dynamic operation(Dynamic): Make the load switch back and forth between two currents.
List operation (List): continuous programmable sequence load mode
CR-LED: Simulate the test function that the load is LED.
Battery test (Battery): Provide battery discharge test, support CC, CR and CP modes.
Time test (Timing): Provide time measurement in basic mode.
Over-current test (OCPT): Provide over-current protection function test.
Overvoltage test (OVPT): Provide overvoltage protection function test.
Overpower Test (OPPT): Provide overpower protection function test.
(Load Effect): Load function of test instrument or equipment.
Frequency sweep (Sweep): Vp+ and Vp- of test instruments or equipment under severe

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conditions.
Automatic test (Auto): Programmable multiple test modes.
2.4.2 SETUP(System Settings Page)
System setting (System): Set the basic working mode of the instrument.
Von/Voff: Set the loading and unloading voltage of the instrument.
Protect: Set the protection value of the voltage, current and power of the instrument.
File (File): save the instrument parameters and data.
Communication Settings (RS-232): Set the communication parameters and methods of the
instrument.