IT 6100 6121, 6122, 6123, 6151, 6152, 6153, 6154 Programmable Power Supply User's Guide

USER’S GUIDE
High Resolution and High Speed
Programmable Power Supply
Models IT6100 Series
© Copyright 2005 All Rights Reserved
Ver1.1 /July, 2005/ IT6100-527
1
About your safety ............................................................................................................................. 3
General information................................................................................................................... 3
Protection from electric shock.................................................................................................... 3
Definition of users...................................................................................................................... 3
Certification and Warranty ................................................................................................................ 4
Certification ............................................................................................................................... 4
Warranty ................................................................................................................................... 4
Limitation of Warranty ........................................................................................................ 4
Introduction ...................................................................................................................................... 4
Chapter1 Quick Reference ............................................................................................................... 5
1.1 The Front Panel................................................................................................................... 5
1.2 The Rear Panel ................................................................................................................... 6
1.3 Preliminary Checkout .......................................................................................................... 7
1. Check the list of supplied items ...................................................................................... 7
2. Connect the power cord and turn on the power supply ................................................... 7
3. Checkout Procedure....................................................................................................... 7
1.4 Output Checkout ................................................................................................................. 8
1.5 If the power Supply Does Not Turn On ................................................................................ 9
1.6 To Adjust the Carrying Handle........................................................................................... 10
1.7 To Rack Mount the Instrument........................................................................................... 10
1.8 Optional accessory............................................................................................................ 13
Chapter 2 Specifications................................................................................................................. 14
2.1 Specifications .................................................................................................................... 14
IT6120 Series DC Power Supply ...................................................................................... 14
IT6150 Series High Resolution Power Supply .................................................................. 15
2.2 Supplemental Characteristics ............................................................................................ 15
Chapter 3 Front-panel Operation.................................................................................................... 18
3.1Keyboard Disposal ............................................................................................................. 18
Multiple Key Instruction .................................................................................................... 18
Function Key Instruction ................................................................................................... 19
3.2 Front-panel Operation Overview........................................................................................ 19
3.3 Setting Voltage .................................................................................................................. 19
3.4 Setting Current .................................................................................................................. 20
3.5 Saving and Recalling Operation ........................................................................................ 20
3.6 Menu Operation................................................................................................................. 20
3.6.1 Menu Description..................................................................................................... 20
3.6.2 Menu Function......................................................................................................... 22
3.7 Output Operation............................................................................................................... 27
3.8 Remote Sense................................................................................................................... 27
3.9 Milliohm Meter ................................................................................................................... 28
3.10 Voltage Meter .................................................................................................................. 28
Chapter 4 Remote Operation Mode................................................................................................ 29
4.1 Communication cable ........................................................................................................ 29
IT-E131 RS232 Communication Cable ............................................................................. 29
IT-E132 USB Communication Cable................................................................................. 29
IT-E135 GPIB Communication Cable................................................................................ 29
4.2 Communication between Power Supply and Computer ..................................................... 30
2
About your safety
Pease review the following safety precautions before operating our equipment.
General information
The following safety precautions should be observed before using this product and any associated
instrumentations. Although some instruments and accessories would be used with non-hazardous
voltages, there are situations where hazardous conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar
with the safety precautions required to avoid possible injury. Read and follow all installation, operation,
and maintenance information carefully before using the product. Refer to this manual for complete
product specifications.
If the product is used in a manner not specified, the protection provided by the product may be
impaired.
Before performing any maintenance, disconnect the line cord and all test cables.
Protection from electric shock
Operators of this instrument must be protected from electric shock at all times. The responsible body
must ensure that operators are prevented access and/or insulated from every connection point. In
some cases, connections must be exposed to potential human contact. Product operators in these
circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is
capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.
Definition of users
Responsible body is the individual or group responsible for the use and maintenance of equipment is
operated within its specifications and operating limits, and for ensuring that operators are adequately
trained.
Operators use the product for its intended function. They must be trained in electrical safety
procedures and proper use of the instrument. They must be protected from electric shock and contact
with hazardous live circuits.
Service is only to be performed by qualified service personnel.
Safety symbols and terms
Connect it to safety earth ground using the wire recommended in the user
manual.
The symbol on an instrument indicates that the user should refer to the operating
instructions located in the manual.
High voltage danger
3
Certification and Warranty
Certification
We certify that this product met its published specifications at time of shipment from the factory.
Warranty
This instrument product is warranted against defects in material and workmanship for a period of one
year from date of delivery. During the warranty period we will, at its option, either repair or replace
products which prove to be defective. For warranty service, with the exception of warranty options,
this product must be returned to a service facility designated by us. Customer shall prepay shipping
charges by (and shall pay all duty and taxes) for products returned to the supplier for warranty service.
Except for products returned to customer from another country, supplier shall pay for return of
products to customer.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance
by the Customer, Customer-supplied software or interfacing, unauthorized modification or misuse,
operation outside of the environmental specifications for the product, or improper site preparation and
maintenance.
Introduction
IT6100 Series power supplies are high resolution and high speed programmable DC power supplies.
This series have very small size of 2U, and they are equipped with 5 12 digital voltage meter and m Ω
meter. That means you don’t need to invest extra money to purchase digital meter. This series offer
flexible solution to general laboratory and workshop requirement.
Convenient bench-top features:
• VFD display
• Liner programmable power supply with low ripple and noise
• Very high accuracy and resolution of 0.1mV/0.1mA
• High rise speed<30mS
• Equipped with 5 12 digital voltage meter and m Ω meter
• Small size can be installed in standard 19’’ rack or bench top
• Remote control via USB/RS232/GPIB
• Limit voltage protection
• Over current/temperature protection
• Free software for control the machine on computer
4
Chapter1 Quick Reference
1.1 The Front Panel
IT6120 Series’ Front Panel
Fig 1.1 IT6120 series’ front panel
1
2
3
4
5
6
7
VFD display
Rotary knob
Power switch
Numeric keys and ESC key
Function keys
Up , down key and ENTER key
Output terminals
IT6150 Series’ Front Panel
1
3
4
5
2
6
8
7
Fig 1.2 IT6150 series’s front panel
1
VFD display
2 rotary knob
3 power switch
4 Numeric keys and ESC key
5
5
function keys
up, down key and ENTER key
7 input terminals
8 output terminals
6
1.2 The Rear Panel
① IT6120 Series’ Rear Pane
8-Pin Trigger and Remote sensing connectors
9-Pin COM port interface connector
Power switch (110V / 220V)
Cooling window
voltage measurement terminals
Power socket
6
② IT6150 Series’ Rear Panel
4
5
1
1
2
3
4
5
3
2
9-Pin COM port interface connector
4-Pin Trigger and Remote sensing connectors
Power socket
Power switch (110V / 220V)
Cooling window
1.3 Preliminary Checkout
The following steps help you verify that the power supply ready for use.
1. Check the list of supplied items
Verify that you have received the following items with your power supply. If anything is missing,
contact your nearest Sales Office.
□ One power cord for your location
□ One user’s manual
□ Calibration Report
□ CD-Rom
□ Communication cable (optional)
2. Connect the power cord and turn on the power supply
When you turn on the power supply, the front-panel display will light up briefly while the power
supply performs its power-on self-test. All the VFD annunciators will light up at once. To review the
display with all annunciators, you can check if there is any stroke loss on any annunciator.
3. Checkout Procedure
If the EEPROM was damaged or the latest operation data in EEPROM is lost, the VFD will display as
follows:
ERR EEPROM
7
If the calibration data in EEPROM is lost, the VFD will display as follows:
ERROR Calibration Data
If the latest state of the power supply in EEPROM is lost, the VFD will display as follows:
Error Config Data
If you press the “shift” button when power on the power supply, the VFD displays the information of
the machine, version of the firmware and the series number of the machine.
Sourc: XXV XA Meas: XXV
Ver: 1.72 SN:5975002002
Press “Esc” to exit, VFD displays as follows:
The first row is the actual output voltage value and current value, and the state of power supply; the
second row is voltage value measured by voltage meter, and output voltage value set by power
supply.
0.000V 0.00000A OFF
0.000V
3.000V
The first line is the actual voltage value and current value, the state of the power supply.
The second line is the voltage value tested by voltage meter and the setting voltage of the power
supply.
Warning: The power supply is shipped from the factory with a power-line cord that
has a plug appropriate for your location. Your power supply is equipped with a 3-wire
grounding type power cord; the third conductor being the ground. The power supply is
grounded only when the power-line cord is plugged into an appropriate receptacle. Do
not operate your power supply without adequate cabinet ground connection.
1.4 Output Checkout
The following procedures check to ensure that the power supply develops its rated outputs and
properly responds to operation from the front panel.
Voltage Output Checkout
The following steps verify basic voltage functions without load.
1) Turn on the power supply.
2)
Enable the outputs
Press Out on/off key to let the CV annunciator turn on to light.
3）Set the voltage value
Set some different voltage values, then wait till the Meter mode to check if the VFD
displayed voltage value is the same as the set voltage value, and to check if the VFD
displayed current value is nearly zero.
4） Ensure that the voltage can be adjusted from zero to the full rated value.
8
Current Output Checkout
The following steps check basic current functions with a short across the power supply’s output.
1）
） Turn on the power supply.
2）
）Disable the output
Press On/Off key to ensure that the output is disabled.
3) Connect a short across (+) and (-) output terminals with an insulated test lead.
Use a wire size sufficient to handle the maximum current.
4) Enable the output.
5)
Adjust the voltage value to 1.0 volt.
Adjust the voltage to 1.0 volt to ensure the power supply is in CC operation mode. The CC
annunciator will turn on.
6)
Adjust the current value.
Set some different voltage values, then wait till the Meter mode to check if the VFD
displayed current value is the same as the set voltage value, and to check if the VFD
displayed voltage value is nearly zero.
7)
Ensure that the current can be adjusted from zero to the full rated value.
8) Turn off the power supply and remove the short wire from the output terminals.
1.5 If the power Supply Does Not Turn On
Use the following steps to help solve problems you might encounter when turning on the instrument.
If you need more help, refer to chapter 6 for instructions on returning the instrument to the supplier for
service.
1. Verify that there is AC power to the power supply.
First, verify that the power cord is firmly plugged into the power receptacle on the rear panel of the
power supply. You should also make sure that the power source you plugged the power supply into is
energized. Then, verify that the power supply is turned on.
2. Verify the power-line voltage setting.
The line voltage is set to the proper value for your country (110VAC or 220VAC) when the power
supply is shipped from the factory. Change the voltage setting if it’s not correct.
3. Verify that the correct power-line fuse is installed.
If the fuse was damaged, please see the table below to replace the fuse for your power supply.
Model
Fuse Description(110VAC）
） Fuse Description（
（220VAC）
）
IT6121
T2.5A 250V
T1.25A 250V
IT6122
T2.5A 250V
T1.25A 250V
IT6123
T2.5A 250V
T1.25A 250V
IT6151
T10A 250V
T5A
250V
IT6152
T10A 250V
T5A
250V
IT6153
T10A 250V
T5A
250V
IT6154
T10A 250V
T5A
250V
9
1.6 To Adjust the Carrying Handle
To adjust the position, grasp the handle by the sides and pull outward. Then, rotate the handle to the
desired position.
Bench-top viewing positions
Carrying position
1.7 To Rack Mount the Instrument
You can mount the power supply in a standard 19-inch rack cabinet using the IT-E151 rack mount kit.
Note: Remove the carrying handle and the two plastic ears before rack-mounting the instrument. To
remove the handle, grasp the handle by sides and pull outwards and rotate it to a special position to
let the arrow on the handle and the arrow on the plastic ears be in opposite directions, then pull the
handle outward. After removing the handle, you can use a screwdriver to remove the two plastic ears.
10
To rack mount a single instrument, order rack mount kit IT-E151
To rack mount two instruments side-by-side, order rack mount kit IT-E151,
you needn’t to use the front cover panel.
IT6150 series power supply rack mount:
IT6150 series’ power supply installation：
：
IT6150 series power supply can be mounted in standard 19 inch rack, IT-E151 is the
accessory we prepared for customer.
Remove the right and left plastic ears on the power supply , and then put it in the
IT-E151,and then tighten the screws.
11
Steps:
the front picture when install IT6150 power supply in IT-E151
Unit: milimeter（mm）
12
1.8 Optional accessory
IT-E151：
：19 inch rack mount
IT-E131：
：RS232 communication cable
IT-E132：
：USB communication cable
IT-E135：
：GPIB connector
13
Chapter 2 Specifications
2.1 Specifications
IT6120 Series DC Power Supply
Parameter
Output Ratings
( 0 °C~40 °C)
Load Regulation
±(％
％of output+offset)
Line Regulation
±(％
％of output+offset)
Programming resolution
Readback resolution
Programming
accuracy, 12months,
(25 °C ± 5 °C)
％of output+offset)
±(％
Readback accuracy
12months,
(25 °C ± 5 °C)
±(％
％of output+offset)
Ripple
(20Hz ~20MHz)
Temperature coefficient,
(0 °C~40 °C)
±(％
％of output+offset)
Readback temperature,
coefficient,
％of output+offset)
±(％
Dimension(mm)
Weight
IT6121
IT6122
0 ~20V
0 ~32V
0~5A
0~3A
0 ~21V
0 ~33V
≤0.01%+2mV
≤0.05%+1mA
≤0.01%+1mV
Voltage
Current
LVP
Voltage
Current
Voltage
Current
≤0.05%+0.1mA
Voltage
Current
Voltage
Current
0.5mV
0.1mA
0.1mV
0.05mA
0.01mA
IT6123
0~72V
0~1.2A
0 ~73V
≤0.01%+2mV
≤0.05%+0.3mA
≤0.01%+2mV
≤0.05%+0.05m
A
2mV
0.02mA
0.5mV
0.01mA
Voltage
≤0.03%+3mV
≤0.03%+6mV
Current
≤0.05%+2mA
≤0.05%+1mA
Voltage
≤0.02%+3mV
≤0.02%+5mV
Current
≤0.05%+2mA
≤0.05%+1mA
Voltage
Current
≤3mVp-p
≤3mArms
≤4mVp-p
≤3mArms
≤5mVp-p
≤3mArms
Voltage
≤0.02%+3mV
≤0.02%+5mV
Current
≤0.05%+2mA
≤0.05%+0.5mA
Voltage
≤0.02%+3mV
≤0.02%+5mV
Current
≤0.05%+2mA
≤0.05%+0.5mA
214.5mmW×88.2mmH×354.6mmD
8 kg
14
IT6150 Series High Resolution Power Supply
Parameter
Voltage
Current
LVP
IT6151
0~5.2V
0~60A
0~5.5V
Voltage
<0.05%+30mV
Current
<0.1%+10mA
<0.1%+5mA
<0.1%+2mA
Line Regulation
Voltage
±(％
％of
Curren
output+offset)
Programming
Voltage
resolution
Current
Resdback
Voltage
resolution
Current
Programming
Voltage
accuracy,12
months±(%of
output
Current
+offset)
Readback
Voltage
accuracy
±(%of
Current
output+offset)
Ripple
Voltage
(20Hz~20MHz)
Current
Temperature
Voltage
Coefficient
( 0 °C~40 °C)
±(%of
Current
output+offset)
Readback
Voltage
temperature
coefficient±(%of
Current
output+offset)
Dimension(mm)
Weight
<0.02%+1mV
<0.02%+1mV
<0.02%+2mV
<0.1%+1mA
<0.01%+1mA
<0.01%+0.1mA
0.1mV
1mA
0.1mV
1mA
0.5mV
1mA
0.1mV
0.1mA
0.5mV
1mA
0.5mV
0.1mA
0.02%+2mV
<0.02%+6mV
≤0.02%+12mV
<0.1%+30mA
<0.1%+15mA
<0.05%+10mA
0.02%+1.5mV
0.02%+3mV
0.02%+6mV
<0.05%+15mA
<0.05%+10mA
<0.05%+5mA
≤4mVp-p
<15mArms
≤4mVp-p
<5mArms
≤5mVp-p
<3mArms
<0.02%+2mV
<0.02%+5mV
<0.02%+10mV
<0.1%+30mA
<0.1%+15mA
<0.05%+5mA
<0.02%+2mV
<0.02%+5mV
<0.02%+10mV
<0.1%+30mA
≤0.05%+10mA
≤0.05%+5mA
Output Ratings
( 0 °C~40 °C)
The model of
remotsense±(%of
output+offset)
IT6152
IT6153
0~20V
0~30V
0~27A
0~18A
0~21V
0~31V
<0.05%+20mV<0.05%+15mV
429mmW×88.2mmH×458.9mmD
29 kg
2.2 Supplemental Characteristics
State Storage Memory
Fifty (50) user-configurable stored states
Recommended Calibration Interval
Once a year
15
IT6154
0~60V
0~9A
0~61V
<0.05%+10mV
AC Input Ratings (selectable via switch on the rear panel)
Option Opt.01: 220VAC ± 10%, 47 to 63 Hz
Option Opt.02: 110 VAC ± 10%, 47 to 63 H
Maximum power
IT6121
100W
IT6122
100W
IT6123
100W
IT6151
540W
IT6152
540W
IT6153
540W
IT6154
540W
Cooling
Fan cooled
Operating Temperature
0 to 40 °C
Storage Temperature
-20 to 70 °C.
Environmental Conditions
Designed for indoor use in an installation category II, pollution degree 2 environment. Designed to
operate at maximum relative humidity of 95% and at altitudes of up to 2000 meters.
Dimensions of IT6120 Series
214.5mmW x 88.2mm H x 354.6m D
(Unit: mm)
16
Dimensions of IT6150 Series
429mmW×88.2mmH×354.6mmD
17
Chapter 3 Front-panel Operation
So far you have learned how to install your power supply and do quick start. During the quick
start, you were briefly introduced to operating from the front panel as you learned how to check
basic voltage and current functions. This chapter describes in detail the use of the front-panel
keys and shows how they are used to accomplish power supply operation.
This chapter is divided into the following sections:
Front-Panel Operation Overview,
Setting Voltage
Setting Current
Storing Operation
Menu Operation
On/Off Operation
Remote Sense Function
m Ω Meter
5 12 Digital Voltage Meter
3.1Keyboard Disposal
1
2
Menu
List
3
Esc
V-set
I-set
Save
Recall
Shift
On/Off
Trigger
4
5
6
0
V/m Ω
0.1W
1W
10W
7
8
9
·
Local
Multiple Key
Function Key
Multiple Key Instruction
V/mΩ: 5 12 Digital Voltage Meter / m Ω Meter
0.1W: The range of m Ω Meter is 0.1W
1W: The range of m Ω Meter is 1W
10W: The range of m Ω Meter is 10W
18
Enter
Function Key Instruction
V-set
I-set
Save
Recall
Menu
On/Off
Shift
Set the voltage value
Set the current value
Save the currently data of the power supply to internal register
Recall the data from the internal register
Set the parameter of power supply
Set the output state of power supply
Use it with multiple key
▲：Up key
▼：Down key
Enter: Press it to confirm
3.2 Front-panel Operation Overview
The following section describes an overview of the front-panel keys before operating your power
supply.
1. The power supply is shipped from the factory configured in the front-panel operation mode. At
power-on, the power supply is automatically set to operate in the front-panel operation mode.
When in this mode, the front panel keys can be used.
2. When the power supply is in remote operation mode, you cannot use the front-panel. A change
between front-panel and remote operation modes will not result in any change in the output
parameters. You can change the front-panel and remote operation modes by computer.
3. The output of the power supply can be enabled or disabled from the front panel by
pressing On/Off key.
4. The VFD display shows the present operating status of the power supply with annunciators. Turn
on the power supply, VFD displays two lines data. The first line shows the actual output voltage
value, current value and the state of the power supply. The second line shows the voltage value
tested by the voltage meter and the output value of the power supply.
3.3 Setting Voltage
The constant voltage range is from 0V to the maximum voltage value of each model. It is very easy
for you to set the constant voltage output. You have 2 solutions to set the constant voltage value.
Solution1：
：
Step1: Power on the IT6100 series instrument
Step2: Press the ▲ and ▼ keys to change the value
Solution2:
Step1: Power on the IT6100 series instrument
Step2: Press V-set
Step3: Use the numeric keys 0 to
Step4: Press Enter to confirm.
9
or ▲ and ▼ keys to change the voltage value.
19
3.4 Setting Current
The constant current output range is from 0A to the maximum current value of each type. It is very
easy for you to set the constant current output.
Step1. Power on the IT6800 series instrument
Step2. Press I-Set key
Step3. Use the numeric keys 0 to 9 or use ▲and ▼keys to change the current value
Step4. Press Enter key to confirm the value
3.5 Saving and Recalling Operation
You can use Save or Recall or use the SCPI order *SAV、*RCL to store up to 50 different output
states in storage register locations(1 to 50). If the fast recall function is turned on, you can recall the
saved settings by pressing numerical key （0~9）. You can store the followings: the maximum output
voltage value, the voltage setting value, the current setting value and the step value of voltage.
You can use Save and 0~50 numeric key，press Enter , and store the parameter of IT6100
series into the register.
You can use Recall and 0~50 numeric key, press Enter , and recall the parameter stored before
from the register.
3.6 Menu Operation
3.6.1 Menu Description
Press MENU to indicate operation mode. View the menu in VFD, and use ▲ and ▼to scroll through
the complete menu list as following. If press ENTER , you could get the selected menu function.
Press
ESC
back to the previous menu selection page.
MENU
Config
Config Init.
Out Recall
On
Off<Default>
PWR-ON Recall
On
Off<Default>
Key Sound Set
On<Default>
Off
Knob Lock Set
Return to the factory default setup value.
Setting Power-on state of power supply.
When users turn on the power supply; its setup value will
keep the state of last time as users turned off the power
supply.
Disable this function.
Setting power-on parameter of power supply
When users turn on the power supply; its setup value will
keep the state of last time as users turned off the power
supply.
Disable this function.
Keypad sound setting.
Enable key sound.
Disable key sound
Setup Rotary knob lock state.
On
Lock Rotary knob.
Off< Default >
Unlock Rotary knob.
Remote Sense
Setup voltage measurement Mode.
20
On
The electronic load will measure input voltage from the
remote sense connector.
Off< Default >
The power supply will measure input value from the
front panel connector.
ShortCut Recall
Quickly recall the data stored before
On
Enable this function
Off<Default>
Disable this function
OVP Set
Setting over voltage protection
On
Enable this function
Off< Default >
Disable this function
Meter Rate Set
Setting the speed of power supply
High
High speed
Low< Default >
Low speed
Baudrate set
Setting baud rate
Baudrate
4800
<
Default >
Baudrate 9600
Baudrate 19200
Baudrate 38400
Comm. Parity
Communication parity bit set.
None< Default >
Even
Odd
Address Set
Setting communication address(range from 0to 254)
Address=＊＊
＊＊
Port Mode
Select function of port
Trigger< Def >
RI/DIF
DIGITAL I/O
Trig Source
Setting trigger mode
Immediat<Def>
Trigger signals from Shift + Trigger key
External
Trigger signals from the TRIG connector in the rear
panel.
Bus
Communication command trigger mode.
RI Mode
Control the output mode
Off< Default >
Disable this function
Latching
Live
DFI Source
Discrete Fault Indicator
Off< Default >
QUES
Question Bit
OPER
Operation Bit
ESB
Event State Bit
RQS
Require Bit
Key Lock Set
Setting keypad password.
Press ENTER directly to disable the key lock function.
Password= ﹡﹡﹡﹡
Exit
21
System Set
Max Volt. set
Setup the Maximum Voltage.
Max= ﹡﹡﹡﹡
Step Volt Set
Set voltage step
Step=﹡﹡﹡﹡
Exit
List Set
Call ListFile
Recall list operation file.
Edit ListFile
Edit list operation file.
Continuous
Once
Repeat
Step
Once
Repeat
Save Mode Set
Users can choose 4 kinds of memory space to save the list
file.
8 X 25 Steps
4 X 50 Steps
2 X 100 Steps
1 X200 Steps
Exit
Out
On Output timer，if you start this function, the power supply will turn off after the
Timer
time you set.
Timer State
Setting POWER ON timer state
On
When users choose the timer state ON, and then turn
on the power supply’s output, the POWER ON TIMER
will start working, and when the POWER ON TIMER is
reach the setup time, the power supply’s output will
turn off automatically.
Off< Default >
Timer Set
Setting time of POWER ON timer.
Timer= ﹡﹡S
Exit
Exit
3.6.2 Menu Function
Output Recall
This function can help you set the output state when the power supply is powered on. If you select On,
the power supply will keep the state of last time as it is turned off. If you select Off, this function is
disabled. Default is On.
Key Sound
22
This instruction can switch on/off the buzzing sound when you press any key, if you select On, the
buzzer will sound when any key was pressed. If you select Off, the buzzer will not sound when the
keys were pressed. Default is On.
ShortCut Recall
This function can help you recall the data stored before.
Option:
1） Press Shift + MENU into menu operation, VFD displays Config, press
2） Press▲、▼to select ShortCut Recall, press ENTER to confirm.
3） Press▲、▼to select On, press
ENTER
ENTER
to confirm.
to confirm.
ESC
4） Press
two times to escape menu operation.
or I-set
, select 0 to 9 to set voltage value or current value, press
ENTER
to confirm.
Save
6） Press
, VFD displays Store 1, select 0 to 9 to set the register number（range from 1
to 50）, press ENTER to confirm.
You can recall the data stored before by pressing the register number.
5） Press V-set
Over voltage Protection（
（>OVP Set）
）
When the output voltage exceeds the constant voltage by 5%, or the connection is unsuccessful
under remote sense mode, the power supply will protect itself automatically. The power supply must
be turned on again. When the power is in overvoltage protection, the output is off, and buzzer is
mooing. VFD displays as following:
Over Voltage
When the power supply with other power supply is in parallel connection, please disable this function.
Setting Communication Baud Rate (>BAUDRATE)
This function can help you set communication baud rate. There are 4 kinds of baud rate, 4800HZ,
9600HZ, 19200HZ and 38400HZ. Make sure that power’s baud rate is as the same as your computer
before communication. Default baud rate is 4800HZ.
Setting Address(>ADDRESS)
This instruction can set the communication address for each power supply. The address range is from
0 to 30. Before the communication, you must make sure that there is same address between the
power supply and the computer. Default address is 0.
Option:
1） Press Shift
confirm.
+
MENU
into menu operation, VFD displays Config, press
2） Press▲、▼to select Address Set, press ENTER to confirm.
3） VFD displays Address=＊＊
＊＊,
＊＊ select 0 to 9 and set address, press
23
ENTER
ENTER
to confirm.
to
ESC
4） Press
two times to escape menu operation.
Port Mode
The level of the port on the rear panel is TTL, and the port has 3 kinds of function as follows:
TRIGGER: pin1 and pin 2 can be used as the external trigger source for power supply, and can
control the list operation.
RI/DFI：Inhibit Input can control the output state of power supply, Fault Output can find fault of power
supply.
DIGITAL I/O：It can read and control output and input state.
Pinmode
1
2
3
4
Trigger
RI/DFI
DIGITAL I/O
Trigger in
GND
No Use
No Use
Inhibit Input
GND
Fault Output
GND
Digital Input
GND
Digital Output
GND
Trigger Operation (Shift+Trigger)
The power supply has 3 kinds of trigger mode. You must choose trigger source before trigger
operating.
Trigger Key: If this function is enabled, press Shift + Trigger , the power supply will start trigger
operation once.
External trigger signal(TTL): There is a trigger input port on the rear panel. When this function is
enabled, please give this trigger input port a pulse about 5 mS, and the power supply
will start trigger operation once.
Bus: When this function is enabled, and the power supply receives order*TRG or TRIgger, the
power supply will start trigger operation once.
Remote Inhibit
RI input has 3 modes: LATCHING、L IVE、OFF
LATCHING：When the level of RI port changes from high to low, the output of power supply is off.
LIVE：The output state of power supply changes along with the level of RI port. If the level of RI is
high, the output is on; and the level of RI is low, the output of power supply is off.
OFF： The level state of RI do not affect the output state of power supply.
Discrete Fault Indicator
DFI source contains QUES、OPER 、ESB、RQS、OFF.
QUES：The output level of DFI changes along with the state of QUES bit. When QUES bit is 1, DFI
outputs low level. When QUES bit is 0, DFI outputs high level.
OPER：The output level of DFI changes along with the state of OPER bit.
ESB：The output level of DFI changes along with the state of ESB bit.
RQS：The output level of DFI changes along with the state of RQS bit.
OFF：The output level of DFI remains high.
KEY LOCK
24
This instruction can set a password (1 through 4 digits) to lock the function keys operation. After
setting the password, all the function keys on the front panel will be locked except the OUT on/off key.
You must enter the correct password to unlock them, then you can continue to do the function key
operation. If you don’t want to lock the function keys, please don’t press any number key when you
enter the >KEY LOCK instruction, just press ENTER key to unlock it.
Note: When shipped from factory, there is no password and function keys are unlocked. The start bit of your
desired password shouldn’t be 0.
List Set
Before you edit the list file, please set trigger source as “immediate” in the menu.
Action:
1) Press Shift + Menu into the menu.
2) Press up or down key to select “Config”, press Enter to confirm.
3) Press up or down key to select “Trig Source”, press Enter to confirm.
4) Press up or down key to select “Immediat”, press Enter to confirm.
You can make the input change order by editing every step value of list operation. The parameter of
list operation includes the name of list file, input step (no more than 400 steps), step time (the
minimum is 1mS) and every step value. The list file can be stored in ROM whose capacity is 4K, and
it can be fast recalled. This store area is divided into A, B, C and D four areas. In area A, there is only
1 group whose capacity is 4Kb. In area B, there are 2 groups and each group’s capacity is 2Kb. In
area C, there 4 groups and each group’s capacity is 1Kb. In area D, there are 8 groups and each
group’s capacity is 512b.
If the list operation mode is CONTINIOUS, when you receiving a trigger signal, the power supply will
start list operation until the list operation is over or a trigger is received again.
：
Operation：
1）
Press Shift + Menu into menu operation.
2）
VFD displays Config，press▼to select List Set，press Enter to confirm.
Enter to confirm.
3）
VFD displays Call ListFile，press▼to select Edit ListFile, press
4）
VFD displays Continuous，press
5）
8）
VFD displays Once, press▼to select Repeat，press Enter to confirm，select circle
operation.
VFD displays Second, press▼to select MilliSecond, press Enter to confirm, select time
unit.
VFD displays List Count= _, press numeric key or move the rotary knob, set circle times( in
this example, count is 2)，press Enter to confirm.
VFD displays1th=＊
＊ .＊＊＊＊
＊＊＊＊V,
press numeric key or move the rotary knob, set the
＊＊＊＊
9）
maximum voltage, press Enter to confirm.
VFD displays 1th=＊
＊.＊＊＊＊
＊＊＊＊A,
press numeric key or move the rotary knob, set the
＊＊＊＊
10）
maximum current, press Enter to confirm.
VFD displays 1th=＊
＊mS, press numeric key or move the rotary knob, set delay time, press
6）
7）
Enter to confirm.
Enter to confirm.
25
12）
VFD displays 2th=＊
＊.＊＊＊＊
＊＊＊＊V,
＊＊＊＊ press numeric key or move the rotary knob, set the
maximum voltage, press Enter to confirm.
VFD displays 2th=＊
＊.＊＊＊＊
＊＊＊＊A,
press numeric key or move the rotary knob, set the
＊＊＊＊
13）
maximum current, press Enter to confirm.
VFD displays 2th=＊
＊mS，press numeric key or move the rotary knob, set delay time, press
11）
Enter to confirm.
14）
VFD display Store File_，press numeric key or move the rotary knob, set the register
number（1 to 8）, press
15）
16）
Enter to confirm.
Esc
Press
two times to escape menu operation.
Shift
Press
+ List to set the list file, then press Shift + Trigger to run the list file.
Shift
Press
+ List
to stop.
If you have edited several list files, you can call the list file that you need by “Call ListFile” function in
Esc
two times to exit menu operation. And then press Shift + List to set it,
the menu. Press
press Shift + Trigger to run the file that you call. press Shift + List to stop running.
Trigger
Trigger
When the list operation mode is STEP, the power supply will go to the next step when receive a
trigger signal.
Trigger
Trigger
Trigger
Trigger
Trigger
Trigger
Trigger Trigger
Digital I/O
When the digital port of the power supply mode is DIGITALI/O and power supply is under remote
sense, you could send SCPI order （DIGital:INPut[:STATe?] and DIGital:OUTPut[:STATe?]）to read
and set the state of output and input port.
26
3.7 Output Operation
If you control the power supply by front panel, you can press On/Off and switch the state of output.
If power supply is under remote sense, you can send SCPI order (OUTPut ON|OFF) to change the
state of output.
3.8 Remote Sense
The wire connected the power supply and electronic load will produce voltage difference when the
current of the power supply is so big. In order to make the measurement accuracy much accurate,
there are 4 pin trigger and remote sensing connectors on the rear panel and you can use it to
measure the output voltage of the tested instrument. You must set remote sense mode before you
start remote test function.
IT6120 8 pin connector in rear panel
+
-
+S
-S
INH GND FLT GND
+,-: Output port, they are as the same as the output in front panel
+S,-S: Sense port
INH: this port hat multiple function
When “Port Mode” in the menu is set with “Trigger”, INH is trigger port.
When “Port Mode” in the menu is set with “RI/DIF”, INH can set the output status on/off. Here INH port
has 3 working mode to choose.
LATCHING：When the level of INH port changes from high to low, the output of power supply is off.
LIVE：The output state of power supply changes along with the level of INH port. If the level of INH is
1, the output is on; and the level of INH is 0, the output of power supply is off.
OFF： The level state of INH do not affect the output state of power supply.
When “Port Mode” in the menu is set with “DIGITAL I/O”, INH port becomes the digital input port to
read input status by communication order.
FLT: this port hat multiple function
When “Port Mode” in the menu is set with “Trigger”, FLT is an invalid port.
When “Port Mode” in the menu is set with “RI/DIF”, FLT port can find fault of power supply.
FLT source contains QUES, OPER, ESB, RQS, OFF.
QUES：The output level of FLT changes along with the state of QUES bit. When QUES bit is 1, FLT
outputs low level. When QUES bit is 0, FLT outputs high level.
OPER：The output level of FLT changes along with the state of OPER bit.
ESB：The output level of FLT changes along with the state of ESB bit.
RQS：The output level of FLT changes along with the state of RQS bit.
OFF：The output level of FLT remains high.
When “Port Mode” in menu is set with “DIGITAL I/O”, FLT port becomes output port to control the
output status by communication order.
IT6150 4 pin connector in rear panel
GND TRIN
- +
GND,TRIN: Trigger port
27
-,+: Remote sense port
3.9 Milliohm Meter
SOURCE METER can measure resistant value accurately and the biggest resistance it can measure
is 1kΩ. In order to protect the resistor, please select the power range of the resistor before you
measure it. Wiring diagram as follows:
5 ½ DVM
+
－
OUTPUT
－
+
R
There are 3 ranges to be chosen: 0.1W、1W、10W.
The accuracy of the measurement is <1%, the higher range you select, the more accurate result you
can get.
Option:
1）Press Shift +V/m Ω（if VFD displays＊＊
＊＊．＊＊
＊＊V, press Shift +V/m Ω ）, set m:＊＊
＊＊, you can
＊＊
＊＊
measure resistance value.
2）Press Shift +0.1W /1W /10W, you can set different range of milliohm meter.
3.10 Voltage Meter
Wiring diagram as follows:
5 ½ DVM
+
－
Load
待测物
Press Shift +V/m Ω（if VFD displays Range: ＊＊，
＊＊ please press Shift
＊＊．＊＊
＊＊ ＊＊V,
＊＊ you can begin to test the voltage value.
The accuracy is <0.1%.
28
+V/m Ω ）, VFD displays
Chapter 4 Remote Operation Mode
The DB9 interface connector on the rear panel of the power supply can be transferred to RS-232
interface, the following information will tell you how to use the computer to control the output of the
power supply.
4.1 Communication cable
IT-E131 RS232 Communication Cable
The DB9 interface connector on the rear panel of power supply is TTL voltage level; you can use the
communication cable (IT-E131) to connect the DB9 interface connector of the power supply and the
RS-232 interface connector of computer for the communication.
Computer side
TTL→RS232 Cable (IT-E131)
PS side
IT-E131 communication cable
Power
Load
supply
COMPUTER
IT
RS232
IT-E131 ISOLATED
COMMUNICATION CABLE
ISOLATION
RX
TTL(5V)
TX
859666668889942311
INSTRUMENT
PC
PC
IT-E132 USB Communication Cable
The DB9 interface connector on the rear panel of power supply is TTL voltage level; you can use
the communication cable (IT-E132) to connect the DB9 interface connector of the power supply
and the USB interface connector of computer for the communication.
IT-E131
cable
IT-E132communication
communication
cable
Power
Load
supply
COMPUTER
IT
RS232
IT-E131 ISOLATED
COMMUNICATION CABLE
ISOLATION
RX
TTL(5V)
TX
859666668889942311
INSTRUMENT
PC
PC
IT-E135 GPIB Communication Cable
The DB9 interface connector on the rear panel of power supply is TTL voltage level; you can use
the GPIB communication cable (IT-E135) to connect the DB9 interface connector of the power
supply, and then connect the GPIB interface of the IT-E135 and computer with GPIB/IEEE 488
line for the communication.
29
IT-E135 outer communication adapter
COM interface of
GPIB line
Power supply
IT-E135 ISOLATED
Serial /IEEE 488 Controller
Note: Forbidden to connect DB9 connector in power supply directly with PC or other RS232 port.
4.2 Communication between Power Supply
and Computer
Before using the remote operation mode, please make sure that the baud rate and communication
address in power supply are the same as in the computer software, otherwise, the communication will
fail, you can change the baud rate and communication address from the front panel or from computer.
1． Address: the range is from 0 to 254，default setting is 0
2． Baud rate: 4800,9600,19200 and 38400 are selectable, default setting is 4800
3． Data bit：8 bit
4． Stop bit：1
5． Parity：None
Parity=None
1.
2.
Start Bit
8 Data Bits
Stop Bit
Stop Bit
End of String is ’\n’(0x0a)
DB9 Interface Details
DB9 in the rear panel of power supply is TTL level signal. It can be connecting with standard PC
interface through the isolated communication cable.
30