ITECH IT6100 IT6121, IT6122, IT6123, IT6151, IT6152, IT6153, IT6154 Programmable Power Supply User's Guide

Below you will find brief information for Programmable Power Supply IT6100 IT6121, Programmable Power Supply IT6100 IT6122, Programmable Power Supply IT6100 IT6123, Programmable Power Supply IT6100 IT6151, Programmable Power Supply IT6100 IT6152, Programmable Power Supply IT6100 IT6153, Programmable Power Supply IT6100 IT6154. The IT6100 series are high resolution and high speed programmable DC power supplies. This series is equipped with 5 ½ digital voltage meter and mΩmeter. With the ITECH IT6100 series, you can control and adjust the voltage and current in a precise and flexible way, allowing you to test circuits and devices with accuracy. You can also utilize the mΩmeter to efficiently determine the resistance of components.

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USER’S GUIDE

High Resolution and High Speed

Programmable Power Supply

Models IT6100 Series

This user manual is applicable to:

Model: IT6121/IT6122/IT6123

IT6151/IT6152/IT6153/IT6154

Copyright 2009 All Rights Reserved

Ver2.0/Oct, 2009/ IT6100-527

I n t r o d u c t i o n

Chapter1 Quick Reference ...................................................................

1.1 The Front Panel

1.2 The Rear Panel

····················································································

1.3 Preliminary Checkout ····················································································

1. Check the list of supplied items ···································································

2. Connect the power cord and turn on the power supply ··································

3. Checkout Procedure ····················································································

1.4 Output Checkout ····················································································

1.5 If the power Supply Does Not Turn On ······························································

1.6 To Adjust the Carrying Handle ····················································································

1.7 To Rack Mount the Instrument ····················································································

1.8 Optional accessory ····················································································

Chapter 2 Specifications ......................................................................

2.1 Specifications ····················································································

IT6120 Series DC Power Supply ······························································

IT6150 Series High Resolution Power Supply ·················································

2.2 Supplemental Characteristics ····················································································

Chapter 3 Front-panel Operation .....................................................

3.1Keyboard Disposal ····················································································

Multiple Key Instruction ····················································································

Function Key Instruction ····················································································

3.2 Front-panel Operation Overview ····················································································

3.3 Setting Voltage ·····················································································

3.4 Setting Current ····················································································

3.5 Saving and Recalling Operation ·······························································

3.6 Menu Operation ····················································································

3.6.1 Menu Description ····················································································

3.6.2 Menu Function ····················································································

3.7 Output Operation ····················································································

3.8 Remote Sense

3.9 Milliohm Meter

3.10 Voltage Meter

····················································································

Chapter 4 Remote Operation Mode .........................................................

4.1 Communication cable ····················································································

IT-E131 RS232 Communication Cable ······························································

IT-E132 USB Communication Cable

IT-E135 GPIB Communication Cable

······························································

4.2 Communication between Power Supply and Computer ············································

2 USER’S GUIDE

About your safety

Please 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.

USER’S GUIDE 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. 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, fire, abuse or negligence.

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 digital voltage meter and mΩmeter. 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 digital voltage meter and mΩmeter

• 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 remote control the machine on computer

4 USER’S GUIDE

Chapter1 Quick Reference

1.1 The Front Panel

Fig 1.1 IT6120 series’ front panel

VFD display

Rotary knob

Power switch

Numeric keys and ESC key

Function keys

Up , down key and ENTER key

Output terminals

1 2

3 4 5 6 7

1 2

3 4 5 6 7 8

Fig 1.2 IT6150 series’s front panel

VFD display

Rotary knob

Power switch

Numeric keys and ESC key

Function keys

Up, down key and ENTER key

Voltage measurement terminals

Output terminals

USER’S GUIDE 5

Chapter1 Quick Reference

1.2 The Rear Panel

4 5 6

Fig 1.3 IT6120 Series’ Rear Panel

8-Pin Trigger and Remote sensing connectors

9-Pin COM port interface connector

Power switch (110V / 220V)

Cooling window voltage measurement terminals

Power socket

1 2 3

5 4 3

Fig 1.3 IT6150 Series’ Rear Panel

9-Pin COM port interface connector

4-Pin Trigger and Remote sensing connectors

Power socket

Power switch (110V / 220V)

Cooling window

6 USER’S GUIDE

1 2

Chapter1 Quick Reference

1.3 Preliminary Checkout

The following steps help you to 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.

3. Checkout Procedure

If the EEPROM was damaged or the latest operation data in EEPROM is lost, the VFD will display as follows:

If the calibration data in EEPROM is lost, the

VFD will display as follows:

If the latest state of the power supply in

EEPROM is lost, the VFD will display as follows:

If the factory calibration data that saved in the EEPROM is lost, the VFD will display as follows:

EEPROM Error

Error Config Data

Error Calibration Data

Error Factory Cal.Data

USER’S GUIDE 7

Chapter1 Quick Reference

If you press the “shift” button when power on the power supply, the VFD will display the information of the machine, version of the firmware and the series number.

Press “Esc” to exit, VFD displays as follows:

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.

Sourc: XXV XA Meas: XXV

Ver: 1.72 SN:5975002002

0.000V 0.00000A OFF

0.000V 3.000V

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.

8 USER’S GUIDE

Chapter1 Quick Reference

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.

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.

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.

USER’S GUIDE 9

Chapter1 Quick Reference

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

IT6121

IT6122

IT6123

IT6151

IT6152

IT6153

IT6154

Fuse Description(110VAC)

T2.5A 250V

T10A 250V

Fuse Description(220VAC)

T1.25A 250V

T5A 250V

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

10 USER’S GUIDE

Chapter1 Quick Reference

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

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.

USER’S GUIDE 11

Chapter1 Quick Reference

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.

Steps:

Step 1

Step 2 the front picture when install IT6150 power supply in IT-E151

465.50

482.60

Unit: milimeter(mm)

1.8 Optional accessory

IT-E151: 19 inch rack mount

IT-E131: RS232 communication cable

IT-E132: USB communication cable

IT-E135: GPIB connector

12 USER’S GUIDE

Chapter 2 Specificationse

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

Current

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

LVP

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

IT6121

0 ~20V

0~5A

0 ~21V

﹤0.01%+2mV

﹤0.05%+1mA

﹤0.01%+1mV

﹤0.05%+0.1mA

0.5mV

0.1mA

0.1mV

0.05mA

﹤0.03%+3mV

IT6122

0 ~32V

0~3A

0 ~33V

﹤0.01%+2mV

﹤0.05%+0.3mA

﹤0.01%+1mV

≤0.05%+0.05mA

0.5mV

0.02mA

0.5mV

0.01mA

≤0.03%+6mV

IT6123

0~72V

0~1.2A

0 ~73V

≤0.01%+2mV

≤0.05%+0.3mA

≤0.01%+2mV

≤0.05%+0.05mA

0.5mV

0.02mA

0.5mV

0.01mA

≤0.03%+6mV

﹤0.05%+2mA

﹤0.02%+3mV

≤0.05%+1mA

≤0.02%+5mV

≤0.05%+1mA

≤0.02%+5mV

﹤0.05%+2mA ≤0.05%+1mA ≤0.05%+1mA

3mVp-p

3mArms

﹤0.02%+3mV

﹤0.05%+2mA

4mVp-p

3mArms

≤0.02%+5mV

﹤0.05%+0.5mA

5mVp-p

3mArms

≤0.02%+5mV

≤0.05%+0.5mA

﹤0.02%+3mV ≤0.02%+5mV ≤0.02%+5mV

﹤0.05%+2mA ≤0.05%+0.5mA

≤0.05%+0.5mA

214.5mmW×88.2mmH×354.6mmD

8 kg

USER’S GUIDE 13

Chapter 2 Specificationse

IT6150 Series High Resolution Power Supply

Parameter

Output Ratings

( 0 °C~40 °C)

The model of remotsense

±(%ofoutput+offset)

Line Regulation

±(%of output+offset)

Programming resolution

Resdback resolution

Programming accuracy,

12 months

±(%of output+offset)

Readback accuracy

±(%of output+offset)

Ripple

(20Hz~20MHz)

Temperature Coefficient

( 0 °C~40 °C)

±(%of output+offset)

Readback temperature coefficient

±(%of output+offset)

Dimension(mm)

Weight

Voltage

Current

LVP

Voltage

Current

Voltage

Curren

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

Voltage

Current

IT6151

0~5.2V

0~60A

0~5.5V

﹤0.01%+0.5mV

﹤0.1%+10mA

﹤0.02%+0.1mV

﹤0.1%+1mA

0.1mV

1mA

0.02%+2mV

﹤0.1%+30mA

0.02%+1.5mV

﹤0.05%+15mA

4mVp-p

15mArms

0.02%+2mV

﹤0.1%+30mA

0.02%+2mV

﹤0.1%+30mA

0.02%+2mV

﹤0.1%+20mA

429mmW×88.2mmH×354.6mmD

29kg

IT6152 IT6153

0~20V 0~30V

0~27A 0~18A

0~21V 0~31V

﹤0.01%+1mV

﹤0.1%+5mA

﹤0.02%+1mV

﹤0.01%+1mA

1mV

1mA

﹤0.02%+6mV

﹤0.1%+15mA

0.02%+3mV

﹤0.05%+10mA

4mVp-p

5mArms

0.02%+5mV

﹤0.1%+15mA

0.02%+5mV

﹤0.1%+15mA

0.02%+5mV

≤0.05%+10mA

IT6154

0~60V

0~9A

0~61V

﹤0.01%+1mV

﹤0.1%+2mA

﹤0.02%+1mV

﹤0.01%+0.1mA

1mV

0.1mA

≤0.02%+12mV

﹤0.05%+10mA

0.02%+6mV

﹤0.05%+5mA

5mVp-p

3mArms

0.02%+10mV

﹤0.05%+5mA

0.02%+10mV

﹤0.05%+5mA

0.02%+10mV

≤0.05%+5mA

2.2 Supplemental Characteristics

State Storage Memory

Fifty (50) user-configurable stored states

Recommended Calibration Interval

Once a year

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 Hz

14 USER’S GUIDE

Chapter 2 Specificationse

IT6121

100W

Cooling

Fan cooled

IT6122

100W

Operating Temperature

0 to 40 °C

Storage Temperature

-20 to 70 °C.

IT6123

100W

IT6151

540W

IT6152

540W

IT6153

540W

IT6154

540W

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 88.2mmH x 354.6mmD

(Unit: mm)

USER’S GUIDE 15

2.2

Specificationse

Dimensions of IT6150 Series: 429mmW×88.2mmH×354.6mmD

434.8

429.1

(Unit: mm)

16 USER’S GUIDE

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

mΩMeter

Digital Voltage Meter

3.1Keyboard Disposal

V/m Ω

List

Trigger

0.1W

Local

10W

Multiple Key

Function Key

Multiple Key Instruction

V/mΩ:

Digital Voltage Meter / mΩ Meter

0.1W:

The range of m Meter is 0.1W

1W:

The range of mΩ Meter is 1W

10W:

The range of mΩ Meter is 10W

USER’S GUIDE 17

V-set l-set

Save

Recall

On/Off

Shift

Function Key Instruction

Enter

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

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

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.

18 USER’S GUIDE

Chapter 3 Front-panel Operation

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 or the rotary knob to change the value

Solution2:

Step1: Power on the IT6100 series instrument

Step2: Press

V-set

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

3.5 Saving and Recalling Operation

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: voltage setting value, current setting value, the maximum output voltage value, and the step value of voltage. into the register.

from the register.

USER’S GUIDE 19

3.6 Menu Operation

3.6.1 Menu Description

Config

Config Init.

Out Recall

Off﹤Default>

PWR-ON Recall

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

Off﹤Default>

Key Sound Set

On﹤Default>

Off

Knob Lock Set

On 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.

Lock Rotary knob.

Off﹤ Default >

Remote Sense

Unlock Rotary knob.

Setup voltage measurement Mode.

Off﹤ Default >

The power supply will measure output voltage from the remote sense connector.

The power supply will measure output value from the front panel connector.

ShortCut Recall

Off﹤Default>

Baudrate set

Quickly recall the data stored before

Enable this function

Disable this function

Setting baud rate

Baudrate 4800 ﹤

Default >

Baudrate 9600

Baudrate 19200

Baudrate 38400

20 USER’S GUIDE

Chapter 3 Front-panel Operation

Comm. Parity Communication parity bit set

None﹤ Default >

Even

Odd

Setting communication address(range from 0to 254) Address Set

Address= **

Port Mode Select function of port

Trigger﹤ Def >

RI/DIF

DIGITAL I/O

Trig Source Setting trigger mode

Immediat﹤Def> Trigger signals from + key

Trigger signals from the TRIG connector in the rear

External

Bus

RI Mode panel.

Communication command trigger mode.

Control the output mode

Off﹤ Default > Disable this function

Latching

Live

DFI Source Discrete Fault Indicator

Off﹤ Default >

QUES

OPER

ESB

RQS

Question Bit

Operation Bit

Event State Bit

Require Bit

List Set

Key Lock Set

Setting keypad password.

Press directly to disable the key lock function.

Password= ****

Enter

Exit

System Set

Max Volt. set

Max= ****

Step Volt Set

Step=****

Exit

Setup the Maximum Voltage.

Set voltage step

Recall list operation file.

Edit list operation file.

Call ListFile

Edit ListFile

Continuous

Step

Save Mode Set

8 X 25 Steps

4 X 50 Steps

2 X 100 Steps

1 X200 Steps

Once

Repeat

Users can choose 4 kinds of memory space to save the list file.

Exit

Once

Repeat

USER’S GUIDE 21

Out On Timer

Output timer,if you start this function, the power supply will turnoff after the time you set.

Timer State

Setting POWER ON timer state

When users choose the timer state ON, then turn on the power supply 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

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

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:

to confirm.

You can recall the data stored before by pressing the register number.

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Chapter 3 Front-panel Operation

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:

to confirm.

Enter

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.

USER’S GUIDE 23

Pinmode

Trigger

Trigger in

GND

No Use

RI/DFI

Inhibit Input

GND

Fault Output

GND

Digital I/O

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 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,LIVE,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.

24 USER’S GUIDE

Chapter 3 Front-panel Operation

KEY LOCK

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:

2) Press up or down key to select “Config”, press to confirm.

3) Press up or down key to select “Trig Source”, press to confirm.

4) Press up or down key to select “Immediat”, press 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 200 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.

Operation:

circle operation.

select time unit.

7) VFD displays List Count= _, press numeric key or use the rotary knob, set

USER’S GUIDE 25

VFD displays1th=*.****V, press numeric key or move the rotary knob, set the

VFD displays 1th=*.****A, press numeric key or move the rotary knob, set the

10) VFD displays 1th=*mS, press numeric key or move the rotary knob, set delay

11) VFD displays 2th=*.****V, press numeric key or move the rotary knob, set the

12) VFD displays 2th=*.****A, press numeric key or move the rotary knob, set the

13) VFD displays 2th=*mS, press numeric key or move the rotary knob, set delay

14) VFD display Store File_, press numeric key or move the rotary knob, set the

15) Press two times to escape menu operation.

16) Press + to set the list file, then press + to run

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.

When the list operation mode is

STEP, the power supply will go to the next step when receive a trigger signal.

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 USER’S GUIDE

Chapter 3 Front-panel Operation

3.7 Output Operation

If you control the power supply by front panel, you can press 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 on rear panel

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 has 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.

USER’S GUIDE 27

IT6150 4 pin connector on rear panel

GND

TRIN

GND,TRIN: Trigger port

-,+: 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:

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 +V/m ( if VFD displays **.**V , press +V/m ), set m: ** , you can measure

resistance value.

28 USER’S GUIDE

Chapter 3 Front-panel Operation

3.10 Voltage Meter

Wiring diagram as follows:

5 ½ DVM

Press +V/m (if VFD displays Range: **,please press +V/m ), VFD displays**.**V, you can begin to test the voltage value.

The accuracy is ﹤0.1%.

USER’S GUIDE 29

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 ISOLATED

COMMUNICATION CABLE

Power

Load

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.

30 USER’S GUIDE

Chapter 4 Remote Operation Mode

IT-E131 ISOLATED

COMMUNICATION CABLE

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.

COM interface of

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.

USER’S GUIDE 31

Chapter 4 Remote Operation Mode

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.

Address: the range is from 0 to 254, default setting is 0

Baud rate: 4800,9600,19200 and 38400 are selectable, default setting is 4800

Data bit: 8 bit

Stop bit: 1

Parity: None

Parity=None Start Bit 8 Data Bits Stop Bit Stop Bit

1. End of String is ’\n’(0x0a)

2. 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.

32 USER’S GUIDE

ITECH Electronic Co.,Ltd

China

Tel : 025-52415098

Fax: 025-52415268

3 1 0 # N i n g N a n D a D a o ,

NanJing City, 210012, Jiangsu

Province,China

Europe

Tel : 477-590101

Fax: 477-572323

32, rue Edouard Martel

42100 - St Etienne France

USA

Tel : 714-9219095

Fax: 714-9216422

22820 Savi Ranch Parkway

Yorba Linda, CA 92887 U.S.A.

South Korea

Tel : 285-20680

Fax: 285-20684

#153-783,Rm601,ByuckSan,

GaSan-Dong, Seoul, Korea

Key features

High resolution and high speed
Very high accuracy and resolution
High rise speed
Equipped with 5 ½ digital voltage meter and mΩmeter
Remote control via USB/RS232/GPIB
Limit voltage protection
Over current/temperature protection
Free software for remote control the machine on computer

Frequently asked questions

The remote sense connectors allow you to measure the output voltage of the tested instrument more accurately, compensating for the voltage drop in the wires connecting the power supply and the load.

You can set the communication baud rate in the 'Config' menu, selecting 'Baudrate Set' and choosing the desired rate from 4800Hz, 9600Hz, 19200Hz, or 38400Hz.

The IT6100 series allows you to store up to 50 different output states in storage register locations (1 to 50).