Tonghui TH671 A Series User manual

H6700A Instruction Manual
Operation Manual
TH6700A
Programmable DC Power Supply
[email protected]

H6700A Instruction Manual
CONTENTS
Chapter 1 Overview............................................................................................................................ 1
1.1 Introduction..................................................................................................................1
1.2 Conditions of use..........................................................................................................1
1.2.1 Power supply..................................................................................................... 1
1.2.2 Ambient temperature and humidity.........................................................................2
1.2.3 Preheating.............................................................................................................2
1.3 Safety Requirement.......................................................................................................2
1.3.1 Electrical Insulation Resistance .............................................................................. 2
1.3.2 Dielectric strength ................................................................................................. 2
1.3.3 Leakage Current....................................................................................................2
1.4 Electromagnetic Compatibility.......................................................................................2
1.5 Notes...........................................................................................................................3
Chapter 2 Panel Description ................................................................................................................4
2.1 Front Panel Description................................................................................................. 4
2.2 Rear Panel Description..................................................................................................5
2.3 Display Overview .........................................................................................................7
2.3.1 Display Indicators.................................................................................................. 7
2.3.2 Show page ............................................................................................................8
Chapter 3 Operating Instructions..........................................................................................................9
3.1 Output Display Page .....................................................................................................9
3.2 Function Setting Page....................................................................................................9
3.2.1 Startup/shutdown delay.........................................................................................11
3.2.2 Conversion speed .................................................................................................11
3.2.3 Voltage, current rise/fall rate................................................................................. 12
3.2.4 Analog Internal Resistance...................................................................................12
3.2.5 Drain Resistor ..................................................................................................... 12
3.2.6 Buzzer Switch.....................................................................................................12
3.2.7 Measured Average ...............................................................................................13
3.2.8 Lockout Mode.....................................................................................................13
3.2.9 Bus Mode ...........................................................................................................13
3.2.10 System Settings................................................................................................... 13
3.2.11 Power Failure Setting...........................................................................................14
3.3 OVP/OCP Setup Page .................................................................................................14
3.4 Set Settings Page ........................................................................................................15
3.4.1 CC and CV modes...............................................................................................16
3.5 Utility Setup Page....................................................................................................... 17
3.5.1 File Copy to Memory...........................................................................................18
3.5.2 File Loading........................................................................................................19
3.5.3 File Deletion .......................................................................................................19
3.5.4 File Format .........................................................................................................20
3.5.5 Error Code.......................................................................................................... 21
3.6 POWER Setup Page.................................................................................................... 21
3.6.1 Constant Pressure Control.................................................................................... 22
3.6.2 Constant current control.......................................................................................23

H6700A Instruction Manual
3.6.3 Power-on Output .................................................................................................23
3.6.4 Online Mode.......................................................................................................24
3.6.5 External Logic.....................................................................................................24
Chapter 4 Correct output of the instrument .........................................................................................25
4.1 Output Side................................................................................................................ 25
4.2 Interface Schematic..................................................................................................... 27
4.3 Instrument Series Output.............................................................................................28
4.4 Instrument Parallel Output...........................................................................................30
4.4.1 Host in one - parallel............................................................................................ 30
4.4.2 Host in Two-Parallel............................................................................................31
4.5 External Control Outputs.............................................................................................33
4.5.1 CV External Voltage ............................................................................................ 33
4.5.2 CV External Resistor Rise.................................................................................... 34
4.5.3 CV External Resistance Drop ............................................................................... 34
4.5.4 CC External Voltage ............................................................................................ 34
4.5.5 CC external resistor rising....................................................................................35
4.5.6 CC External Resistance Drop ...............................................................................35
Chapter 5 Interfaces and Communication ...........................................................................................37
5.1 LAN ..........................................................................................................................37
5.1.1 LAN remote control system.................................................................................. 37
5.1.2 System Configuration ..........................................................................................37
5.2 USBTMC................................................................................................................... 37
5.2.1 USBTMC Remote Control System .......................................................................37
5.2.2 System Configuration ..........................................................................................37
5.3 USBCDC................................................................................................................... 37
5.3.1 USBCDC Virtual Serial Port ................................................................................37
5.3.2 System Configuration ..........................................................................................38
5.4 Communication Instruction..........................................................................................38
5.4.1 Basic rules of instruction structure........................................................................ 38
5.4.2 Subsystem commands for the instrument............................................................... 38
5.4.3 Public Commands................................................................................................39
5.4.4 APPLY subsystem command set...........................................................................39
5.4.5 DISPLAY subsystem command set....................................................................... 40
5.4.6 MEASURE subsystem command set.....................................................................40
5.4.7 OUTPUT subsystem command set........................................................................41
5.4.8 SEHSE Subsystem Command Set......................................................................... 43
5.4.9 SOURce subsystem command set......................................................................... 43
5.4.10 SYSTEM subsystem command set........................................................................47
Chapter 6 Technical Parameter Indicators........................................................................................... 54
Chapter 7 Warranty and Changes ....................................................................................................... 59
7.1 Warranty ....................................................................................................................59
7.2 Instruction Manual Change Record .............................................................................. 59
Chapter 8 Appendices .......................................................................................................................60
8.1 Instrument Warning Code............................................................................................ 60
8.2 Instrument Error Code................................................................................................. 60
8.3 Digital Display Comparison Table................................................................................ 61

H6700A Instruction Manual
1
Chapter 1 Overview
Thank you for purchasing and using our products, before you use this instrument,
please first confirm the matters according to the manual chapter 7 "set and warranty", if
there is any discrepancy, please contact us as soon as possible in order to protect your rights
and interests.
1.1 Introduction
TH6700A series is a programmable switching DC power supply. This series of
instrument is powerful, superior performance, and the use of digital tube display, display
clear, quick and easy to operate, can be well adapted to the production site rapid operation
needs and laboratory needs of high precision and high stability, at the same time, the
instrument provides a USB interface and LAN port for the instrument to be used in the
remote operation of the computer to provide the conditions.
The special features and advantages of the instrument are listed below:
Adopt digital tube display, reduce power consumption, display simple and clear
High accuracy and resolution
Low ripple and low noise
Intelligent fan control saves energy and reduces noise
Software control and detection via computer
Precise fine-tuning of values by knob and cursor
High current 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

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1.2.2 Ambient temperature and humidity
Normal operating temperature: 0℃～40℃, Humidity: < 90%RH
Reference operating temperature: 20℃±8 ℃, humidity: < 80%RH
Transportation ambient temperature: 0℃～55℃, humidity:93%RH
1.2.3 Preheating
Warm-up time after power on: >30 minutes
1.3 Safety Requirement
This instrument is a Class I safety instrument
1.3.1 Electrical Insulation Resistance
The insulation resistance between the power supply terminals and the housing is not
less than 50Munder reference operating conditions;
Insulation resistance between the power supply terminals and the housing under hot
and humid transportation conditions is not less than 2M;
1.3.2 Dielectric strength
Under the reference working conditions, the power terminals and the shell can
withstand the rated voltage of 2.1kV DC voltage for 1 minute without breakdown and flying
arc phenomenon.
1.3.3 Leakage Current
Leakage current is not more than 3.5mA.
1.4 Electromagnetic Compatibility
Power transient sensitivity according to GB6833.4.
Conductivity sensitivity is according to the requirements of GB6833.6.
Radiation interference according to the requirements of GB6833.10.

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1.5 Notes
Please do not use in dusty, vibration, direct sunlight, corrosive gases and other adverse
environments.
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 the temperature of 5℃～40℃and relative
humidity not more than 85%RH. The air should not contain harmful impurities that corrode
the measuring instrument, and it should be avoided from direct sunlight.
This instrument has been carefully designed to minimize spurious interference due to
inputs from the AC power supply side, however, it should still be used in as low a spurious
environment as possible, and if this cannot be avoided, a power supply filter should be
installed.
There is a cooling fan at the back of the instrument and cooling vents on the left and
right to avoid the internal temperature from rising and affecting the accuracy, please make
sure the instrument is in a well ventilated condition.
Do not switch the instrument on and off frequently as this may cause loss of stored
data.

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Chapter 2 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.
2.1 Front Panel Description
The front panel schematic is shown in Figure 2-1.
Figure 2-1
See Table 2-1 for an introduction:
1
Trademarks & Models
Show logo, model number and power supply parameters
2
Power switch
Turn on or cut off the 220V mains power, when it is in O position, cut
off the power; when it is in one position, turn on the power.
3
Digital display screen
Display all measurement parameters, status, measurement results, and
more.
4
Function
The function keys are used to configure the various parameters of the
power supply
5
OVP/OCP
Setting the overvoltage or overcurrent protection level
6
Set
Setting the output voltage and output current
7
Utility
For customizing test sequences for testing

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8
Lock/Local
Lock or unlock panel keys to prevent changes to panel settings
9
PWR DSPL
To change the display data from V/A to V/W or W/A, press the
Voltage knob to change to V/W and the Current knob to change to
W/A.
10
Voltage
Current
Knobs for adjusting value size and moving the cursor
11
USB port
HOST port on USB for updating firmware or loading list files
Table 2-1
2.2 Rear Panel Description
The rear panel schematic of the TH67X1A, TH67X2A series is shown in Figure 2-2.
TH6731/TH6741 TH6711/TH6721

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TH6712/TH6722 TH6732/TH6742
Figure 2-2
See Table 2-2 for an introduction:
1
External port
For external input control, on-line, etc.
2
Output side
For output voltage, current
3
Fan (loanword)
For heat dissipation
4
USB
USB DEVICE interface for remote control
5
LAN
LAN port for remote control
6
Three-wire power
socket
Access to power supply
7
Nameplate
Record model number, lot number, etc.
Table 2-2
The rear panel schematic of the TH67X3A series is shown in Figure 2-2-1.
TH6713/TH6723 TH6733/TH6743

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Figure 2-2-1
See Table 2-2-1 for introduction
1
external port
For external input control, on-line, etc.
2
output side
For output voltage, current
3
fan (loanword)
For heat dissipation
4
USB
USB DEVICE interface for remote control
5
LAN
LAN port for remote control
6
wiring outlet
Access to power supply
7
nameplate
Record model number, lot number, etc.
Table 2-2-1
2.3 Display Overview
2.3.1 Display Indicators
A schematic diagram of the display indicators is shown in Figure 2-3-1
Figure 2-3-1
(1) VSR: Voltage Switching Rate
(2) CV: Constant Voltage Mode
(3) RMT: Remote Control Mode
(4) ALM: Alarm on status
(5) DLY: Delayed Output

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(6) CC: Constant current mode
(7) ISR: Current conversion speed
(8) 20 40 60 80 100 %W: Power column indicating current power output as a percentage
2.3.2 Show page
Output Display
This page is the power-up default page and shows the basic measurement display
values.
Function Setting
This page displays generalized setup parameters, such as delay time, voltage rise rate,
and so on.
OVP/OCP Settings
This page displays the overvoltage protection and overcurrent protection setting
parameters.
Set Settings
This page displays the output voltage and output current setting parameters.
Utility Settings
This screen displays the operational settings for the test sequence.
PWR DSPL
This page displays the measurement parameters V/W or W/A.
POW DSPL
This page displays power failure setup parameters such as on-line mode, external
control, etc.

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Chapter 3 Operating Instructions
3.1 Output Display Page
Power on to enter the output display interface when the current, voltage and a series of
measurement parameters are set, press the Output key output, output, the key shows red.
The interface displays the output voltage, current and power display value.
If the output is turned off, the Output key red light goes out.
3.2 Function Setting Page
Press the Function key to enter the function page, as shown in Figure 3-1, and the
main configurations are shown in Table 3-1.
Figure 3-2
Operation procedure: first rotate the Voltage knob to select the function sequence,

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10
then rotate and press the Current knob to set, and finally press the Voltage knob to confirm
the setting.
Functional
sequence
Function
Setting instructions
F-00
Enter your
password and
upgrade
Enter the password 6700 to enter the upgrade interface, which
can upgrade the instrument software.
F-01
Start-up delay
0--99.99 (s)
F-02
Off Delay
0--99.99 (s)
F-03
Conversion
speed
0-CV high speed, 1-CC high speed, 2-CV programmable, 3-CC
programmable
F-04
Voltage Rise
Rate
>0
F-05
Voltage drop
rate
>0
F-06
Current Rise
Rate
>0
F-07
Current drop
rate
>0
F-08
Analog
internal
resistance
0--Max
F-09
Drain Resistor
0-Close, 1-Open
F-10
Buzzer Switch
0-Close, 1-Open
F-17
Measured
average
0-slow, 1-medium, 2-fast
F-19
Lockout mode
0-OFF, 1-ON/OFF
F-24
Bus Mode
0-USBCDC, 1-USBTMC, 2-LAN
F-30
MACaddr
F-31
MACaddr
F-32
MACaddr
F-33
MACaddr
F-34
MACaddr
F-35
MACaddr
F-39
Ipaddr
F-40
Ipaddr
F-41
Ipaddr
F-42
Ipaddr
F-43
NETMASK

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F-44
NETMASK
F-45
NETMASK
F-46
NETMASK
F-47
GATEWAY
F-48
GATEWAY
F-49
GATEWAY
F-50
GATEWAY
F-88
Initialization
F-89
Releases
F-90
CV control
mode
0-panel, 1-voltage, 2-resistance rise, 3-resistance fall
F-91
CC control
mode
0-panel, 1-voltage, 2-resistance rise, 3-resistance fall
F-92
Power-on
output (of an
electrical
device etc)
0-Close, 1-Open
F-93
Online mode
0-master, 1-master one-parallel, 2-master two-parallel, 3-slave
parallel, 4-slave serial
F-94
External logic
0-open high, 1-open low
Table 3-1
3.2.1 Startup/shutdown delay
F-01: Add a delay when the instrument turns on the output, when the Output key is
pressed to turn on the output, the delay is then output in seconds (s).
F-02: Adds a delay when the instrument turns off the output, when the Output key is
pressed to turn off the output, the delay is then turned off in seconds (s).
3.2.2 Conversion speed
F-03: The rising speed of setting value is divided into four modes: 0-constant voltage
(CV) high speed, 1-constant current (CC) high speed, 2-constant voltage (CV) can be set,
and 3-constant current (CC) can be set, and different modes can be selected through the
panel.
Constant voltage high speed: set voltage value immediately sent to DA conversion,
output
Constant current high speed: set current value immediately sent to DA conversion,

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output
Constant voltage can be set: set the voltage value according to the rate set to send to
the DA conversion, output. For example: voltage set 20V, voltage rise rate set 5V/s, open
the output, 4s later, the voltage rises to 20V.
Constant current can be set: set the current value according to the set rate sent to the
DA conversion, output. For example: the current is set to 20A, the current rise rate is set to
5A/s, open the output, and after 4s, the current rises to 20A.
3.2.3 Voltage, current rise/fall rate
F-04: The rate of rise of the voltage when the instrument sets the output.
F-05: The rate of voltage drop when the instrument sets the output.
The above two function settings are valid only when the conversion speed is
CV-settable (F-03 is set to 2).
F-06: The rate of rise of the current when the instrument sets the output.
F-07: The rate at which the current falls when the instrument sets the output.
The above two function settings are valid only when the conversion speed is CC
settable (F-03 set to 3).
3.2.4 Analog Internal Resistance
F-08: Used as the internal resistance of the voltage source, set in Ω.
3.2.5 Drain Resistor
F-09: Dummy load of the instrument, can be selected to open or close, when the drain
resistor is open, constant voltage mode no-load shutdown output can be quickly discharged,
0-closed, 1-open.
3.2.6 Buzzer Switch
F-10: Used as an instrument signal, 0-closed, 1-open.

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3.2.7 Measured Average
F-17: Sampling speed, there are 0-slow (low speed), 1-medium (medium speed), 2-fast
(high speed), which can be selected according to the page display.
1. Low speed: slow sampling, high accuracy
2. Medium speed: between low and high speed
3. High speed: fast sampling speed, slightly less accurate
3.2.8 Lockout Mode
F-19: Function of pressing the Output button when the panel is locked.
0-OFF: When the panel is locked, pressing the Output button will only turn off the
output;
1-ON/OFF: When the panel is locked, press the Output button to turn the output on
and off.
3.2.9 Bus Mode
F-24: Interface settings for connection to external devices, 0-USBCDC, 1-USBTMC,
2-LAN.
LAN: Local Area Network settings:
F-30~F-35: MAC address, 6 bytes, hexadecimal number , (not settable).
F-39~F-42: IP address, 0~255 decimal integer
F-43~F-46: subnet mask, 0~255 decimal integer
F-47~F-50: gateway, 0~255 decimal integer
3.2.10System Settings
F88: System initialization, restore factory settings, 0-disable, 1-initialize.
F-89: Version lookup, 0-year, 1-month, 2-day, 3-5 version numbers

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3.2.11Power Failure Setting
F-90: Output voltage control mode in constant voltage mode, 0-panel control output,
1-external voltage control output, 2-external resistor rising control output, 3-external
resistor falling control output.
F-91: Output current control mode in constant current mode, 0-panel control output,
1-external voltage control output, 2-external resistance rise control output, 3-external
resistance fall control output.
F-92: Whether or not to output directly at power on, 0-off, 1-on.
F-93: This series of instruments can be more than one on-line, for stacking power,
according to the need to choose series or parallel connection, 0-master, 1-master a parallel,
2-master two parallel, 3-slave parallel, 4-slave series.
F-94: 0-high open, 1-low open.
Under this page, F-90~F-94 cannot be changed, see section 3.6 for details.
3.3 OVP/OCP Setup Page
Press the OVP/OCP key to enter the overvoltage/overcurrent setting page, as shown in
Figure 3-3.

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Figure 3-2
Operation Procedure: Press or rotate the Voltage knob to set the OVP value size, and
press or rotate the Current knob to set the OCP value size.
3.4 Set Settings Page
Press Set to enter the output voltage and current setting page, as shown in Figure 3-4.

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Figure 3-3
Operation procedure: Press or rotate the Voltage knob to set the output voltage size,
press or rotate the Current knob to set the output current size.
3.4.1 CC and CV modes
When the power supply operates in constant current mode (CC), a constant current is
supplied to the load. In constant current mode, the voltage output can vary while the current
remains constant. When the load resistance increases to the point where the current limit
(ISET) can no longer be maintained, the power supply switches to CV mode. The point at
which the power supply switches modes is the crossover point, as shown in Figure 3-4.
When the power supply is operating in constant voltage mode, it will provide a
constant voltage to the load and the current will vary with the load. In the event that the load
resistance is too low to maintain a constant voltage, the power supply will switch to CC

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mode and maintain the set current limit.
The conditions that determine whether the power supply operates in CC mode or CV
mode depend on the set current (ISET), set voltage (VSET), load resistance (RL), and
critical resistance (RC). The critical resistance is determined by VSET/ISET. When the load
resistance is greater than the critical resistance, the power supply will operate in CV mode.
This means that the voltage output will be equal to the VSET voltage, but the current will
be less than the ISET. If the load resistance decreases to the point where the current output
reaches the ISET level, the power supply switches to CC mode.
Conversely, when the load resistance is less than the critical resistance, the power
supply will operate in CC mode. In CC mode, the current output is equal to ISET and the
voltage output is less than VSET.
Figure 3-4
3.5 Utility Setup Page
Press the Utility key to enter the Test Sequence Setup page, insert the USB flash disk,
you can load the list file for list output, as shown in Figure 3-5.