I-Tech IT6322 User manual

Copyright 2009 All Rights Reserved
Ver2.0/Oct, 2009/ IT6300-508
USER’S GUIDE
Programmable DC Power Supply
Model IT6322

2 USER’S GUIDE
Chapter1 Quick Start ·················································································
1.1 Front Panel & Rear Panel ····················································································
1.2 Preliminary Checkout ····················································································
1. Check the list of supplied items ···································································
2. Connect the power cord and turn on the power supply ·································
3. System Checkout ····················································································
4. Output Checkout ····················································································
5. If Power Supply Does Not Turn On ···································································
6. To Adjust the Carrying Handle ···································································
7. To Rack Mount the Instrument ···································································
Chapter 2 Specifications ················································································
2.1 Specications ····················································································
2.2 Supplemental Characteristics ····················································································
Chapter 3 Front-Panel Operation ·································································
3.1 Front-panel Operation Overview ··································································
3.2 Panel Description ····················································································
3.3 VFD Description and Wiring Diagram ··································································
3.4 Menu Descriptions ····················································································
3.5 Panel Operation ····················································································
3.6 Menu Function ····················································································
■ Power Cong ····················································································
■ System Set ····················································································
■ Power Information ····················································································
Chapter 4 Remote Operation Mode ·································································
4.1 Communication cable ····················································································
4.2 Communication between Power Supply and PC···············································
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Introduction

USER’S GUIDE 3
IT6322 Programmable DC Power Supplies
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 qualied 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 specications.
If the product is used in a manner not specied, 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.
Denition 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 qualied service personnel.
We do not accept responsibility for any direct or indirect nancial damage or loss of prot
that might occur when using the electronic load.

4 USER’S GUIDE
About your safety
The following general safety precautions must be observed during all phases of operation
ofthis instrument. Failure to comply with these precautions or with specific warnings
elsewhere in this manual violates safety standards of design, manufacture, and intended
use of the instrument. ITECH assumes no liability for the customer’s failure to comply with
these requirements.
Safety symbols and terms
Certification and Warranty
Certication
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
modication or misuse, operation outside of the environmental specications for the product,
or improper site preparation and maintenance. Product number or serial number has been
altered deleted, removed or were unable to identify. Damage from the accident, including but
not limited to lightning, water, re, abuse or negligence.
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.

Introduction
IT6300 3 channels power supply has high accuracy and high stability, also has the function
of the limit voltage, over current and over temperature protection. You can set the voltage
and value of from 0V to the max value in every channel. This series power supply can be
connected in series and in parallel connection, it could improve the output ability of the
voltage and the current value to twice. It is the best choice for the quality test in the scientic
research laboratory and the product line.
■ All of 3 channels can output and change voltage
■ Can be connected in series or parallel connection
■ Voltage and current of 3 channels can be displayed at the same time
■ Small size with 1/2 2U
■ VFD display
■ High resolution and high accuracy
■ Output on/off
■ Limit voltage, over current and power protection
■ Low ripple and low noise
■ Communication port: USB/GPIB/RS232
■ Free software for control
■ Fifty operation states storage
■ Set voltage and current value with rotary knob
■ Set output time1~999999S
USER’S GUIDE 5

1.1 Front Panel & Rear Panel
Cooling window
DB9 interface connector
110V/220V Power switch
Fuse
Power socket
Rear Panel
1
2
3
4
5
VFD display
Rotary knob
Power switch
Number keys and “Esc” key
Function key
UP, Down key and “Enter” ket
Output terminals
1
2
3
4
5
6
7
Front Panel
Chapter 1 Quick Start
One of the rst things you will do with your power supply is to become acquainted with the front panel. The
exercises in this chapter prepare the power supply for use and help you get familiar with some of its front-
panel operations.
1
345 6 7
2
51 42 3
Chapter 1 Quick Start
6 USER’S GUIDE

1.2 Preliminary Checkout
The following steps help you verify that the power supply is 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 Ofce.
■ One power cord for your location
■ This User’s Manual.
■ Calibration Report
■ 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. If there isn’t any response when you power on the power supply, please see
Section 5 on page 8 for some service information.
3. System Checkout
When the power supply was powered on,
the system will checkout it self, and VFD will
display as follows:
If EEPROM was damaged, the VFD will
display as follows:
If the latest operation data in EEPROM was
lost, the VFD will display as follows:
If the latest data about off-time in EEPROM
was lost, the VFD will display as follows:
If the calibration data in EEPROM was lost,
the VFD will display as follows:
System Test, Please wait!
EEPROM Error
Data Check Error
Load OffTime Fail
CH X Lost Calibration...
Note: “X” denotes the channel which
has lost calibration data.
Chapter1 Quick Reference
USER’S GUIDE 7

If the calibration data in EEPROM was error
or tthe information calibrated by factory was
lost, the VFD will display as follows:
10.000V 11.000V 3.000V
2.000A 3 .000A 3 .000A
Lost Factory Calibration
0.000V 0.000V 0 .000V
<OFF>
<OFF> <OFF>
VFD displays: the rst row is output voltage,
the second row is the state when the power
supply is on or current. or
Note: there will be a “?” on the VFD if there is error when the system checkout.
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.
Notice: if the voltage value ash, then the power supply is in Set mode, ‘‘Set
mode’’ means that the VFD display shows the setting output voltage and
current. Or the power supply is in Meter mode, ‘Meter mode” means that the
VFD display shows the actual output voltage and current.
3) Check that the front-panel voltmeter properly responds to number keys.
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.
5) Check the voltage of the other two channels as above.
8 USER’S GUIDE
Chapter 1 Quick Start

1) Turn on the power supply.
2) Disable the output.
Press key to ensure that the output is disabled. The ON annunciator
is turned off.
3) Connect a short across (+) and (-) output terminals with an insulated test lead.
Use a wire size sufcient to handle the maximum current.
4) Set voltage value with 1V.
5) Enable the output.
Press key to ensure that the output is enabled.
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 current value.
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.
9) Check the current value of the other two channels as above.
Out On/Off
Out On/Off
5. If Power Supply Does Not Turn On
Use the following steps to help solve problems you might encounter when turning on the
instrument.
■ Current Output Current
The following steps check basic current functions with a short across the power supply’s
output.
1). Verify that there is AC power to the power supply.
First, verify that the power cord is rmly 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.
Chapter1 Quick Reference
USER’S GUIDE 9

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
IT6322 Fuse 3.15A T250V(220V AC)
Fuse 6.30A T250V(110V AC)
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
10 USER’S GUIDE
Chapter 1 Quick Start

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.
Chapter1 Quick Reference
USER’S GUIDE 11

Chapter 2 Specifications
2.1 Specifications
Paramete IT6322
Output ratings
( 0 °C - 40 °C)
Voltage 0~30V×2, 0~5V×1
Current 0~3A×2, 0~3A×1
LVP 0~31V×2, 0~6V×1
The model of remote sense
±(%of output+offset)
Voltage ≤0.01%+3mV
Current ≤0.01%+3mA
Line Regulation
±(%of output+offset)
Voltage ≤0.01%+3mV
Current ≤0.1%+3mA
Programming
Resolution
Voltage 1mV
Current 1mA
Readback
Resolution
Voltage 1mV
Current 1mA
Programming accuracy
(12 months)
±(%of output+offset)
Voltage ≤0.03%+10mV
Current ≤0.1%+5mA
Readback accuracy
(25 °C ± 5 °C)
±(%of output+offset)
Voltage ≤0.03%+10mV
Current ≤0.1%+5mA
Ripple & noise Voltage Ripple≤1mVrms/3mVp-p
Noise≤3mVrms
Temperature coefcient
(0 °C ~ 40 °C)
±(%of output+offset)
Voltage ≤0.03%+10mV
Current ≤0.1%+5mA
Readback accuracy
±(%of output+offset)
Voltage ≤0.03%+10mV
Current ≤0.1%+5mA
Synchro operation in
Series connection
Synchro
error in series
connection
≤0.05%+10mA
Synchro operation in parallel
connection
Programming accuracy
Voltage ≤0.02%+5mV
Current ≤0.1%+20mA
Storage memory Store/recall 50 user-congurable stored states
Timer
Time set 1S~999999S
Resolution 1S
Function Auto Step Running
12 USER’S GUIDE
Chapter 2 Specications

State Storage Memory
9 user-congurable stored states
Recommended Calibration Interval
1 year
AC Input Ratings (selectable via switch on the rear panel)
Option Opt.01: 220AV±10%, 47 - 63HZ
Option Opt.02: 110AV±10%, 47 - 63HZ
Maximum input power
Cooling
Fan cooled
Operating Temperature
0 to 40 °C for full rated output
Storage Temperature
-20 to 70 °C for storage environment.
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.
2.2 Supplemental Characteristics
Model Power
IT6322 750VA
USER’S GUIDE 13
Chapter 2 Specications

3.1 Front-panel Operation Overview
The following section describes an overview of the front-panel keys before operating your power supply.
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
briey 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.
■ The power supply is shipped from the factory congured 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.
■ 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. If the
power supply is in remote mode, and [LOCAL]key is enabled, you can press [LOCAL]key
and the power supply will be in panel mode.
■ The power supply is in Meter mode when it is powered on, and the VFD will display the actual
voltage and current output value. And in the mode, And in this mode, if the knob is screwed, the
power supply will changed to Set mode, and the VFD will display the adjusted voltage and
current value.
■ The output of the power supply can be enabled or disabled from the front panel by pressing key.
When the output is on, the ON annunciator will turn on.
■ VFD can display some operation state or error information. “ ”means the power supply is in
remote. And if there is some error information,”?” will be displayed.
■ If the power supply is in Set mode, you can screw the knob to change the parameter. If the
power supply is in menu operation, you can screw the knob to select the menu. And if the power
supply is in testing mode, you can screw the knob and set voltage value.
■ If there is “?” displayed on the VFD, please consult the error information in the menu and check
it.
On/Off
Introduction
14 USER’S GUIDE
Chapter 3 Front-panel Operation

3.2 Panel Description
0~9
Number key(1~3key can control the output state of 3channels, 4~6key
can set voltage value for the channel, 7~9 can set current value for the
channel.)
Set voltage value
Set current value
Save the currently data of the power supply to internal register
Recall the data from the internal register
Set the parameter f power supply
Set the output state of power supply
Up key, select the menu or channel
Down key, select the menu or channel
l-set
V-set
Menu
Save
Recall
On/Off
4
1 2
7
5
3
6
Esc
0
●
98
Recall
Menu
Enter
V-setV-set
I-setI-set
Save
On/Off
USER’S GUIDE 15
Chapter 3 Front-panel Operation

3.4 Menu Descriptions
Press to indicate operation mode. View the menu in VFD, and use or knob
to scroll through the complete menu list as following. If press , you could get the
selected menu function, press back to the previous menu selection page. If there is”↑↓”
on the left of VFD, it means that this menu function is in the mid of all menu and you can
press key to select other menu function. If there is only”↑”, it means that you can only
press to select the menu. And if there is only”↓” on the left of VFD, it means that you
can only press to select the menu. If there is “ ” on the VFD, it means this menu
function is selected.
Menu
Enter
Esc
Menu
Power Cong...
Reset Cong System reset
Out State Set Set the output state when power-on
Out Parameter Set Set whether to save the output state of last time
Key Sound Set
Knob Function Set
Screen Brightness
Baud Rate Set Set communication baud rate
Communication Parity
System Wait Time
Local Address Set communication address
Key Lock Set Set password
3.3 VFD Description and Wiring Diagram
There are some sighs on the VFD when the power supply is on, which denotes different meaning
OFF The output is off.
The key panel is locked.
The power supply is in remote mode.
? There is some error or fault with the power supply.
Channel sign.
16 USER’S GUIDE
Chapter 3 Front-panel Operation

3.5 Panel Operation
Exit
System Set…
Out Series Set Set series connection
Out Parallel Set Set parallel connection
Max Voltage Set… Set max voltage for each channel
Set First Channel
Set Second Channel
Set Third Channel
Out Time Set… Set output time for each channel
Set First Channel
Set Second Channel
Set Third Channel
Exit
Power Information…
Power Model
Power SN
Soft Version
Cal Information
Error Information
Exit
Exit Menu
■ Channel Operation
When the power supply is in “METER” mode, you can press 、key to select the
channel.
■ OUT ON/OFF
Press to change output state of power supply. If the output state is ON, press it, the
output state will be OFF. While the output state is OFF, press and the state will be
ON.
On/Off
On/Off
USER’S GUIDE 17
Chapter 3 Front-panel Operation

When the power supply is in panel operation, you can press to control the output state of all
channels. Or you can press one number key( , , )to control one channel’ output
state. Key controls the output state of the rst channel, key controls the output state
of the second channel, key controls the output state of the third channel.
When the power supply is in remote mode, you can send SCPI order(OUTPut: ON | OFF)to
set the output state. Output state operation doesn’t affect setting parameter.
1
1
2
2
3
3
Note: pressing is to control the output state of 3 channels at the same time.
If you want to control one channel’s output state, please use the single key for each channel.
On/Off
Solution 1: Press +numeric key, press to conrm.
Solution 2: Press , then press to select cursor position and screw the
knob to set voltage, press or to exit.
Solution 3: Press one number key which can control channel’s voltage setting
(pressing number key can control the rst channel, pressing number
key can control the second channel and pressing number key can
control the third channel). For example, if you want to set voltage for the
rst channel, you can press number key , then press number key+
to set voltage, or press to change the cursor, and then
screw the knob to set voltage value, press or to escape.
5
6
4
4
Esc
Esc
V-set
V-set
Enter
Enter
Enter
Enter
■ Timer Operation
If you have set output time and the power supply is in “METER” mode, you can press to
see the remainder time. When the time is counted down, the power supply will turn off the
channel automatically.
0
When the knob function is enabled:
■ Setting Voltage
18 USER’S GUIDE
Chapter 3 Front-panel Operation

When the knob function is disabled:
Solution 1: Press +numeric key to set voltage value, press to change
the value slightly, press to conrm.
Solution 2: Press one number key which can control channel’s voltage setting
(pressing number key can control the rst channel, pressing number
key can control the second channel and pressing number key can
control the third channel), then press number key or press to set
voltage value, press to conrm.
4
4
V-set
Enter
Enter
5
6
6
■Setting Current
When the knob function is enabled:
Solution 1: Press +numeric key, press to conrm.
Solution 2: Press , the press to select cursor position and screw the
knob to set voltage, press or to exit.
Solution 3: Press one number key which can control channel’s current setting
(pressing number key can control the rst channel, pressing number
key can control the second channel and pressing number key can
control the third channel). For example, if you want to set current for the
rst channel, you can press number key , then press number
key+ to set voltage, or press to change the cursor, and then
screw the knob to set voltage value, press or to escape.
When the knob function is disabled:
Solution 1: Press +numeric key to set voltage value, press to change
the value slightly, press to conrm.
Solution 2: Press one number key which can control channel’s current setting
(pressing number key can control the rst channel, pressing number
key can control the second channel and pressing number key
can control the third channel), then press number key or press
to set current value, press to conrm.
l-set
l-set
l-set
7
7
8
9
Enter
Enter
Enter
Enter
Enter
Enter
Esc
Esc
5
USER’S GUIDE 19
Chapter 3 Front-panel Operation

3.6 Menu Function
■ Saving and Recalling Operation
You can store up to 50 different output states in storage register locations (1 to 9). Each
output state includes Constant voltage value, Constant current value and Maximum output
voltage value, voltage step value. Press +number key, and save voltage and current
value into register. Pressing +number key can recall the value. Or you can use SCPI
order:*SAV、*RCL to save and recall.
Save
Recall
■ Over Temperature Protection
If the power supply inside temperature is over 80℃, it will protect itself. And the output state
is OFF, the buzzer will moo. VFD displays as following:
Over Temp
In menu operation, key and knob can be used to select the menu, is used to
conrm. is used to exit to the menu.
Enter
Esc
■ Power Config
Reset Config
If you enter into this menu and select “YES”, all of parameter will be as default setting.
Out State Set
This function can set output set for the power supply. If you select “Last Set”, the power
supply will save output state as it is powered off last time. If you select “Off”, the output
state is always “OFF” when the power supply is turned on. Recommend setting is “OFF”.
20 USER’S GUIDE
Chapter 3 Front-panel Operation