Tonghui TH6700 User manual

Instruction Manual
OPERATION MANUAL
TH6700
Programmable Switching
Power Supply
TH6700 DC Programmable Switching Power
[email protected]

Table of Contents
Chapter 1 Overview..........................................................................................................1-1
1.1 Introduction...............................................................................................................1-1
1.2 Conditions of Use.....................................................................................................1-1
1.2.1 Power Supply ....................................................................................................1-1
1.2.2 Tnvironmental Temperature and Humidity........................................................1-1
1.2.3 Preheat..............................................................................................................1-2
Chapter 2 A Few Points to Note .....................................................................................2-1
2.1 Volume & Weight......................................................................................................2-1
2.2 Safety Requirements................................................................................................2-1
2.2.1 Insulation Resistance ........................................................................................2-1
2.2.2 Dielectric Strength.............................................................................................2-1
2.2.3 Leakage Current................................................................................................1-1
2.3 Electromagnetic Compatibility..................................................................................2-2
Chapter 3 Panel Description...........................................................................................3-1
3.1 Front Panel Description............................................................................................3-1
3.2 Rear Panel Description ............................................................................................3-2
3.3 Display Area Description..........................................................................................3-4
3.4 Display Page Overview............................................................................................3-5
Chapter 4 Operating Instructions...................................................................................4-1
4.1 Output Display Page ................................................................................................4-1
4.1.1 Voltage Setting..................................................................................................4-1
4.1.2 Current Setting ..................................................................................................4-1
4.1.3 Timer Setting.....................................................................................................4-1
4.1.4 Output................................................................................................................4-2
4.1.5 Data Save..........................................................................................................4-2
4.2 List Output Page.......................................................................................................4-2
4.2.1 File Selection.....................................................................................................4-3
4.2.2 File Load............................................................................................................4-3
4.3 General Setup Page.................................................................................................4-4
4.3.1 Overvoltage Protection......................................................................................4-4
4.3.2 Overcurrent Protection ......................................................................................4-4
4.3.3 Startup Delay.....................................................................................................4-4

4.3.4 Stop Delay.........................................................................................................4-4
4.3.5 Conversion Speed.............................................................................................4-4
4.3.6 Voltage Rise......................................................................................................4-5
4.3.7 Voltage Drop......................................................................................................4-5
4.3.8 Current Rise ......................................................................................................4-5
4.3.9 Current Drop......................................................................................................4-5
4.3.10 Measurement Average....................................................................................4-5
4.3.11 Simulated Internal Resistance.........................................................................4-6
4.3.12 Drain Resistance.............................................................................................4-6
4.4 Power Failure Setting Page .....................................................................................4-6
4.4.1 Constant Voltage Control ..................................................................................4-6
4.4.2 Constant Current Mode.....................................................................................4-7
4.4.3 Online Mode ......................................................................................................4-7
4.4.4 External Logic....................................................................................................4-8
4.4.5 Power-up Output ...............................................................................................4-8
4.5 List Setting Page......................................................................................................4-8
4.5.1 List Setting Editor ..............................................................................................4-8
4.5.2 List Output Setting...........................................................................................4-10
4.5.3 List Save and Clear.........................................................................................4-10
4.6 System Setup Page ...............................................................................................4-10
4.6.1 System Sound.................................................................................................4-10
4.6.2 System Language ...........................................................................................4-11
4.6.3 System Password............................................................................................4-11
4.6.4 System Date....................................................................................................4-11
4.6.5 System Time....................................................................................................4-11
4.7 Communication Setup Page ..................................................................................4-11
4.7.1 RS232..............................................................................................................4-11
4.7.2 LAN..................................................................................................................4-12
4.7.3 USBTMC .........................................................................................................4-12
4.7.4 USBCDC .........................................................................................................4-13
4.7.5 LXI ...................................................................................................................4-13
4.8 Internal File Page...................................................................................................4-13
4.8.1 File Save..........................................................................................................4-13
4.8.2 File Load..........................................................................................................4-14
4.8.3 File Dump ........................................................................................................4-14
4.9 External File Page..................................................................................................4-14

4.9.1 File Load..........................................................................................................4-14
4.9.2 File Copy .........................................................................................................4-14
4.10 Tools Page...........................................................................................................4-14
4.10.1 User Calibration.............................................................................................4-15
4.10.2 System Reset................................................................................................4-16
4.10.3 Restore Factory.............................................................................................4-16
4.10.4 Upgrade.........................................................................................................4-16
Chapter 5 Correct Output of Instrument........................................................................5-1
5.1 Output Terminal........................................................................................................5-1
5.2 Interface Schematic .................................................................................................5-2
5.3 Instrument Series Output.........................................................................................5-4
5.4 Instrument Parallel Output .......................................................................................5-5
5.4.1 Host One Parallel ..............................................................................................5-5
5.4.2 Host Two Parallel ..............................................................................................5-6
5.5 External Control Output............................................................................................5-8
5.5.1 CV External Voltage..........................................................................................5-8
5.5.2 CV External Resistance Rise............................................................................5-8
5.5.3 CV External Resistance Drop............................................................................5-9
5.5.4 CC External Voltage..........................................................................................5-9
5.5.5 CC External Resistance Rise..........................................................................5-10
5.5.6 CC External Resistance Drop .........................................................................5-10
Chapter 6 Interface & Communication...........................................................................6-1
6.1 RS232 ......................................................................................................................6-1
6.1.1 RS232 Interface Description .............................................................................6-1
6.1.2 RS232 Interface Introduction.............................................................................6-1
6.1.3 Communication with Computer.........................................................................6-2
6.2 LAN ..........................................................................................................................6-3
6.2.1 LAN Remote Control System ............................................................................6-3
6.2.2 System Configuration........................................................................................6-4
6.3 USBTMC..................................................................................................................6-4
6.3.1 USBTMC Remote Control System....................................................................6-4
6.3.2 System Configuration........................................................................................6-4
6.4 USBCDC..................................................................................................................6-4
6.4.1 USBCDC Virtual Serial Port ..............................................................................6-4
6.4.2 System Configuration........................................................................................6-5

6.4.3 Driver Installation...............................................................................................6-5
6.5 LXI............................................................................................................................6-6
6.5.1 LXI Remote Control System..............................................................................6-6
6.5.2 System Configuration........................................................................................6-6
6.6 Communication Command.......................................................................................6-6
6.6.1 Communication Command SCPI ......................................................................6-7
6.6.2 Communication Command MODBUS.............................................................6-17
Chapter 7 Technical Specifications ...............................................................................7-1
Chapter 8 Warranty..........................................................................................................8-1
Chapter 9 Appendix .........................................................................................................9-1

TH6700 Series Instruction Manual
Chapter 1--1
Chapter 1 Overview
Thank you for purchasing and using our products. Before you use this
instrument, please first confirm the matters in Chapter 8 of the manual "
Set and Warranty", if there is any discrepancy, please contact us as soon
as possible to protect your rights and interests.
1.1 Introduction
TH6700 series is a programmable switching DC power supply. This
series of instruments is powerful, superior performance, and the LCD
display, clear display, operation menu, fast and convenient, can well
adapt to the needs of rapid operation at the production site and the needs
of high precision and high stability in the laboratory, while the RS232C
interface, USB interface and LAN port provided by the instrument for the
use of remote operation of the computer provide the conditions.
he special features and advantages of the instrument are as follows:
⚫480X272 pixels, 16-bit color, 4.3-inch color TFT LCD screen for
setting test conditions and displaying measurement results, etc.
⚫Numeric keypad operation
⚫High accuracy and high resolution
⚫Low ripple and low noise
⚫Intelligent fan control to save energy and reduce noise
⚫Software control and detection via computer
⚫Precise fine-tuning of values by knob and cursor
⚫High current, high power, and high stability
1.2 Conditions of use
1.2.1 Power supply
Supply voltage: 88~265V
Power frequency: 50Hz/60Hz (1±5%)
Power consumption: <50VA
1.2.2 Environmental Temperature and Humidity
Normal operating temperature: 0℃～40℃, humidity: < 90%RH
Reference operating temperature: 20℃±8℃, humidity: < 80%RH
Transport environment temperature: 0℃～55℃, humidity: 93%RH
1.2.3 Warm-up

TH6700 Series Instruction Manual
Chapter 1--2
Warm-up time after power on: ≥30 minutes

TH6700 Series Instruction Manual
Chapter 2--1
Chapter 2 A Few Points to Note
Please do not use it in adverse environment such as dusty, vibrating,
direct sunlight and corrosive gases.
If the instrument is not used for a long time, please store it in the
original packing box or similar box in a ventilated room with temperature
from 5℃to 40℃and relative humidity not more than 85% RH. The air
should not contain harmful impurities that corrode the measuring
instrument and should be protected from direct sunlight.
The instrument has been carefully designed to reduce noise
interference from the AC power supply input; however, it should still be
used in a low noise environment as much as possible, and if this cannot
be avoided, please install a power supply filter.
This instrument has a cooling fan at the back and cooling ventilation
holes on the left and right to avoid the internal temperature rising and
affecting the accuracy, please make sure the instrument is under good
ventilation.
Do not switch the instrument on and off frequently to avoid loss of
stored data.
2.1 Volume & Weight
Volume(W*H*D): 215mm*130mm*420mm
Weight: max approx. 7.5kg
2.2 Safety Requirements
This instrument is a Class I safety instrument
2.2.1 Insulation Resistance
The insulation resistance between the power terminals and the
housing is not less than 50MΩunder reference operating conditions;
Under hot and humid transportation conditions, the insulation
resistance between the power terminals and the housing is not less than
2MΩ.
2.2.2 Dielectric Strength
Under reference operating conditions, the power terminal and the
housing can withstand the rated voltage of 2.1kV DC voltage for 1 minute
without breakdown and flying arc phenomenon.
2.2.3 Leakage Current

TH6700 Series Instruction Manual
Chapter 2--2
The leakage current is not more than 3.5mA.
2.3 Electromagnetic Compatibility
Power transient sensitivity according to the requirements of
GB6833.4.
Conductivity sensitivity according to the requirements of GB6833.6.
Radiation interference according to the requirements of GB6833.10.

TH6700 Series Instruction Manual
Chapter 3--1
Chapter 3 Panel Description
The content of this chapter is only a general description, the specific
operation and detailed explanation refer to the corresponding content of
Chapter 4.
3.1 Front Panel Description
The front panel diagram is shown in Figure 3-1.
Figure 3-1
The introduction is shown in Table 3-1:
1
Trademark and model
Display trademark, model number and power supply
parameters
2
Power switch
(POWER)
Turn on or turn off the 220V mains power, when in
O position, turn off the power; when in －position,
turn on the power.
3
LCD display screen
480*272 TFT LCD display showing all measurement
parameters, status, measurement results, etc.
4
Soft key
The functions of the six keys in this section are
"soft", i.e., their functions are not fixed and have
different functions in different menus. Conveniently,
their current functions are displayed accordingly in
the "soft key" display area below the LCD.
5
DISP main menu key
Used to access the measurement display page.
1
5-9
1
1
10
12
13-15
19
4
16-18
2
20
3

TH6700 Series Instruction Manual
Chapter 3--2
6
SETUP main menu key
Used to access the measurement setup page.
7
SYSTEM main menu key
Used to access the system setup page.
8
FILE main menu key
Used to access the file setup page.
9
TOOLS main menu key
Used to access the tool setup page.
10
Knob
Used to adjust the size of the value and move the
cursor or arrow.
11
Numeric keypad
Used to enter numbers or, if needed, characters (file
names).
12
Arrow key
Left and right arrow keys for moving the cursor.
13
VSET key
Used to quickly set the voltage value.
14
ISET key
Used to quickly set the current value.
15
TSET Key
Used to quickly set the timer time.
16
LOCK key
Used to lock keys or light up when remote control.
17
LOAD key
Used to load files.
18
COPY key
For screenshot
19
ON/OFF key
Output on or off
20
USB Interface
HOST interface for USB
Table 3-1
3.2 Rear Panel Description
The TH671X, TH672X series rear panel schematic is shown in Figure
3-2.

TH6700 Series Instruction Manual
Chapter 3--3
Figure 3-2
The introduction is shown in Table 3-2:
1
External port
Used for external input control, inline, etc.
2
Output terminal
For output voltage, current
3
Fan
For heat dissipation
4
RS-232C
Serial communication for remote control
5
USB
USB DEVICE interface for remote control
6
LAN
LAN port for remote control
7
Three-wire power outlet
Access to power
8
Nameplate
Record model, batch number, etc.
Table 3-2
The TH673X, TH674X series rear panel schematic is shown in Figure
3-2-1.

TH6700 Series Instruction Manual
Chapter 3--4
Figure 3-2-1
The introduction is shown in Table 3-2-1
1
External port
Used for external input control, inline, etc.
2
Output terminal
For output voltage, current, see 5-1 for details
3
Fan
For heat dissipation
4
RS-232C
Serial communication for remote control
5
USB
USB DEVICE interface for remote control
6
LAN
LAN port for remote control
7
Three-wire power outlet
Access to power
8
Nameplate
Record model, batch number, etc.
Table 3-2-1
3.3 Display Area Description
The display area diagram is shown in Figure 3-3

TH6700 Series Instruction Manual
Chapter 3--5
Figure 3-3
(1) Display page menu area: This area shows the name of the currently
displayed page.
(2) Prompt and warning message area: This area displays a prompt
message when the instrument is running or operating incorrectly.
(3) Interface Lock and USB display area: Displays lock icon and USB
icon.
(4) Output mode display area: Displays the current output mode and
timing time.
(5) Output setting area: Displays the current output voltage, current, and
timer time.
(6) Output display area: Displays the current output voltage, current and
power level.
(7) Softkey menu area: The content of this area is not fixed and shows
the function corresponding to the current softkey.
3.4 Display Page Overview
⚫Output Display (OUTPUT DISP)
This page is the default page for power-up and displays the basic
setup parameters and measured display values.
⚫List Output (TRIG OUTPUT)
This page displays the list output information and optionally loads
the output list file.
⚫List Display (TRIGLIST DISP)

TH6700 Series Instruction Manual
Chapter 3--6
This page displays the list output information and optionally loads
the output list file.
⚫General Settings (GENERAL SET)
This page displays general setup parameters such as
overvoltage protection, voltage rise time, etc.
⚫Power Failure Setting (POWER SET)
This page displays the control mode, online mode, and other
setting parameters.
⚫List Setup (LIST SET)
This page displays the list file information.
⚫System Setup (SYSTEM SET)
This page displays the system parameters such as system
sound, language, and other settings.
⚫Communication Setup (BUS SET)
This page displays the remote-control method and setting
parameters.
⚫Internal Files (INTER FILE)
This page displays information about the internal files and
operations of this instrument.
⚫External Files (EXTER FILE)
This screen displays information and operations for external
(USB) files.
⚫Tools (TOOLS DISP)
This page displays user calibration information, software
upgrades, etc.

TH6700 Series Instruction Manual
Chapter 4--1
Chapter 4 Operating Instructions
4.1 Output Display Page
Press the front panel DISP key to enter the output display interface,
as shown in Figure 4-1
Figure 4-1
4.1.1 Voltage Setting
The voltage setting range is from 0 to the maximum value. The
voltage can be set by the VEST key on the front panel. When the voltage
value is selected, a blue cursor is displayed and the voltage value can be
set in two ways:
Method 1: Press the knob, select the number of bits by the left and
right arrow keys, then select the size with the knob, press the knob to
confirm, generally used for fine tuning.
Method 2: Enter the specific value directly through the numeric keys,
select the unit below, and ENTER key to confirm.
4.1.2 Current Setting
The current setting range is from 0 to the maximum value. The
current can be set by the ISET key on the front panel. When the current
value is selected, the blue cursor is displayed and the current value can
be set in two ways:
Method 1: Press the knob, select the number of bits by the left and
right arrow keys, then select the size with the knob, press the knob to
confirm, generally used for fine tuning.
Method 2: Enter the specific value directly through the numeric keys,
select the unit below, and ENTER key to confirm.
4.1.3 Timer Setting

TH6700 Series Instruction Manual
Chapter 4--2
Timer setting can be set through the TEST key on the front panel.
When the timing time value is selected, the blue cursor is displayed, and
the specific value is entered directly through the numeric keys, and
confirmed by the ENTER key.
4.1.4 Output
When the current, voltage and time are set, press the ON/OFF key to
output, and the key shows red when outputting. The interface shows the
output voltage, current and power display value.
If the timer is turned on, the instrument turns off the output when the
time is up, and the red light of ON/OFF key goes off.
4.1.5 Data Save
The instrument has data saving function, insert the USB disk, press
the Data Save key, the instrument starts to record data, including current,
voltage, time (not open output, time is 0), the rate is 1 time/s, the
maximum can record 5000 times. Press the End Save key, the instrument
will save the data to the USB flash drive, open it in the computer with
Excel (under CSV folder), as shown in the figure
Note: After each shutdown, the data file number will be cleared to
zero, so it should be saved in time, otherwise it will overwrite the last file
with the same name when you turn on the computer again next time.
4.2 List Output Page
Press List Display under the output display page to enter the list
output page, as shown in Figure 4-2.

TH6700 Series Instruction Manual
Chapter 4--3
Figure 4-2
4.2.1 File Selection
Move the cursor to the current list and enter the list file number by the
numeric keys, as shown in Figure 4-2-1.
Figure 4-2-1
4.2.2 File Load
After selecting the file, you can press the LOAD key or page selection
load to load the file, the key will light up red, and the page will show the
output result after opening the output, as shown in Figure 4-2-2.

TH6700 Series Instruction Manual
Chapter 4--4
Figure 4-2-2
4.3 General Setup Page
Press the SETUP key to enter the general setup page, as shown in
Figure 4-3.
Figure 4-3
4.3.1 Overvoltage Protection
Protection parameter for the instrument output, when the sampled
output voltage value exceeds the overvoltage protection value, the
instrument output shuts down to ensure the safety of the instrument and
the load. It can be changed by numeric keyboard input.
4.3.2 Overcurrent protection
Protection parameter for the instrument output, when the sampled
output current value exceeds the overcurrent protection value, the
instrument output shuts down to ensure the safety of the instrument and
the load. It can be changed by numeric keypad input.
4.3.3 Startup Delay
Add a time delay when the instrument turns on the output, and when
the ON/OFF key is pressed to turn on the output, the time delay is then
output.
4.3.4 Stop Delay
Add a delay time when the instrument turns off the output, and when
the ON/OFF key is pressed to turn off the output, the delay time is then
turned off.
4.3.5 Conversion Speed
The rising speed of the setting value is divided into four modes:

TH6700 Series Instruction Manual
Chapter 4--5
constant voltage high speed, constant current high speed, constant
voltage settable and constant current settable, and different modes can be
selected through the panel.
Constant voltage high speed: set voltage value immediately to be
sent to DA converter, output.
Constant current high speed: set current value immediately to be sent
to DA converter, output.
Constant voltage settable: set the voltage value to be sent to DA
conversion at the set rate and output. For example: voltage is set to 20V,
voltage rise is set to 5V/s, turn on the output, and after 4s, the voltage
rises to 20V.
Constant current can be set: set the current value to be sent to DA
conversion at the set rate and output. For example: current setting 20A,
electric. The current rise is set to 5A/s, the output is turned on, and the
current rises to 20A after 4s.
4.3.6 Voltage Rise
The rate of voltage rises when the instrument is turned on the output,
and the conversion speed is available when the constant voltage can be
set.
4.3.7 Voltage Drop
The rate of voltage drops when the instrument is turned off the output,
and the conversion speed is available when the constant voltage can be
set.
4.3.8 Current Rise
The rate of current rises when the instrument is turned on the output,
and the conversion speed is available when the constant current can be
set.
4.3.9 Current Drop
The rate of current drops when the instrument is turned on the output,
and the conversion speed is available when the constant current can be
set.
4.3.10 Measurement Average
Sampling speed, with low speed, medium speed, and high speed,
can be selected according to the page display.
1.Low speed: slow sampling speed, high accuracy