ITech IT8511+, IT8512C+, IT8512A+, IT8512B+, IT8511A+ User Manual

DC Programmable Electronic

Loads

Series IT8500plus User’s Manual

Model:IT8511+/

+/IT8512B+/IT8512C+/IT8512H+/IT8513A+/IT8513C +

/IT8514C+/IT8514B+/IT8516C+

Version:2.0

IT8511A+/IT8511B+/IT8512+/IT8512A

Notices

© Itech Electronic, Co., Ltd. 2015 No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior permission and written consent from Itech Electronic, Co., Ltd. as governed by international copyright laws.

Manual Part Number

IT8500+-402008

Revision

Second Edition: May 09, 2017

Itech Electronic, Co., Ltd.

Trademarks

Pentium is U.S. registered trademarks of Intel Corporation.

Microsoft, Visual Studio, Windows and MS Windows are registered trademarks of Microsoft Corporation in the United States and/or other countries and regions.

Warranty

The materials contained in this document are provided “as is”, and is subject to change, without prior notice, in future editions. Further, to the maximum extent permitted by applicable laws, ITECH disclaims all warrants, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. ITECH shall not be held liable for errors or for incidental or indirect damages in connection with the furnishing, use or application of this document or of any information contained herein. Should ITECH and the user enter into a separate written agreement with warranty terms covering the materials in this document that conflict with these terms, the warranty terms in the separate agreement shall prevail.

Technology Licenses

The hardware and/or software described herein are furnished under a license and may be used or copied only in accordance with the terms of such license.

Safety Notices

A CAUTION sign denotes a hazard. It calls attention to an operating procedure or practice that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

A WARNING sign denotes a hazard.

It calls attention to an operating procedure or practice that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met.

Restricted Rights Legend

Restricted permissions of the U.S. government. Permissions for software and technical data which are authorized to the U.S. Government only include those for custom provision to end users. ITECH follows FAR 12.211 (technical data), 12.212 (computer software). DFARS 252.227-7015 (technical data--commercial products) for national defense and DFARS 227.7202-3 (permissions for commercial computer software or computer software documents) while providing the customized business licenses of software and technical data.

NOTE

A NOTE sign denotes important hint. It calls attention to tips or supplementary information that is essential for users to refer to.

IT8500+ User’s Manual

Direct current

ON (power on)

Alternating current

OFF (power off)

Both direct and alternating current

Power-on state

Protective conductor terminal

Power-off state

Earth (ground) terminal

Reference

Caution, risk of electric shock

Positive terminal

Warning, risk of danger (refer to this manual for specific Warning or Caution information)

Negative terminal

Frame or chassis terminal

-

Quality Certification and Assurance

We certify that series IT8500+ electronic load meets all the published specifications at time of shipment from the factory.

Warranty

ITECH warrants that the product will be free from defects in material and workmanship under normal use for a period of one (1) year from the date of delivery (except those described in the Limitation of Warranty below).

For warranty service or repair, the product must be returned to a service center designated by ITECH.

 The product returned to ITECH for warranty service must be shipped

PREPAID. And ITECH will pay for return of the product to customer.

 If the product is returned to ITECH for warranty service from overseas, all

the freights, duties and other taxes shall be on the account of customer.

Limitation of Warranty

This Warranty will be rendered invalid in case of the following:  Damage caused by circuit installed by customer or using customer own

products or accessories;

 Modified or repaired by customer without authorization;  Damage caused by circuit installed by customer or not operating our

products under designated environment;

 The product model or serial number is altered, deleted, removed or made

illegible by customer;

 Damaged as a result of accidents, including but not limited to lightning,

moisture, fire, improper use or negligence.

Safety Symbols

terminal

IT8500+ User’s Manual

Safety Precautions

The following safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or specific warnings elsewhere in this manual will constitute a default under safety standards of design, manufacture and intended use of the instrument. ITECH assumes no liability for the customer’s failure to comply with these precautions.

 Series IT8500+ electronic load supports 110V/220VAC input and need to

switch the input voltage before operation.

 Do not use the instrument if it is damaged. Before operation, check the

casing to see whether it cracks. Do not operate the instrument in the presence of inflammable gasses, vapors or dusts.

 The electronic load is provided with a three-core power line during delivery

and should be connected to a three-core junction box. Before operation, be sure that the instrument is well grounded.

 Make sure to use the power cord supplied by ITECH.  Check all marks on the instrument before connecting the instrument to

power supply.

 Use electric wires of appropriate load. All loading wires should be capable

of bearing maximum short-circuit current of electronic load without overheating. If there are multiple electronic loads, each pair of the power cord must be capable of bearing the full-loaded rated short-circuit output current

 Ensure the voltage fluctuation of mains supply is less than 10% of the

working voltage range in order to reduce risks of fire and electric shock.

 Do not install alternative parts on the instrument or perform any

unauthorized modification.

 Do not use the instrument if the detachable cover is removed or loosen.  To prevent the possibility of accidental injuries, be sure to use the power

adapter supplied by the manufacturer only.

 Never use the instrument with a life-support system or any other equipment

subject to safety requirements.

 Failure to use the instrument as directed by the manufacturer may render

its protective features void.

 Always clean the casing with a dry cloth. Do not clean the internals.  Make sure the vent hole is always unblocked.

IT8500+ User’s Manual

Environmental Conditions

Requirements

Operating temperature

0°C to 40°C

Operating humidity

20%-80% (non-condensation)

Storage temperature

-20°C to 70 °C

Altitude

Operating up to 2,000 meters

Pollution degree

Pollution degree 2

Installation category

II

The CE mark indicates that the product complies with all the relevant European

gal directives. The specific year (if any) affixed refers to the year when the design was approved.

The instrument complies with the WEEE Directive (2002/96/EC) marking

product label

indicates that you must not discard the

trical/electronic product in domestic

This symbol indicates the time period during which no hazardous or toxic substances are expected to leak or deteriorate during normal use. The

roduct can be used safely

year Environment Friendly Use Period (EFUP). Upon expiration of the EFUP, the product must be immediately recycled.

(WEEE) Directive

This product complies with the WEEE Directive (2002/96/EC) marking requirement. This affix product label indicates that you

household waste.

Product Category

Environmental Conditions

The instrument is designed for indoor use and an area with low condensation. The table below shows the general environmental requirements for the instrument. The speed of fan will change intelligently by the temperature of radiator. When the temperature is up to 40°C, the fan will be on and adjust intelligently when temperature changes.

Note

To make accurate measurements, allow the instrument to warm up for 30 min before operation.

Regulatory Markings

le

requirement. This affixed elec

household waste.

expected service life of the product is 10 years. The p during the 10-

Waste Electrical and Electronic Equiment (WEEE) Directive

2002/96/EC Waste Electrical and Electronic Equipment

must not discard the electrical/electronic product in domestic

IT8500+ User’s Manual

With reference to the equipment classifications described in the

of the WEEE Directive, this instrument is classified as a

ITECH office.

Annex I “Monitoring and Control Instrument”. To return this unwanted instrument, contact your nearest

IT8500+ User’s Manual

IEC 61326-1:2012/ EN 61326-1:2013 ¹²³

Reference Standards

CISPR 11:2009+A1:2010/ EN 55011:2009+A1:2010 (Group 1, Class A)

IEC 61000-4-2:2008/ EN 61000-4-2:2009

IEC 61000-4-3:2006+A1:2007+A2:2010/ EN 61000-4-3:2006+A1:2008+A2:2010

IEC 61000-4-4:2004+A1:2010/ EN 61000-4-4:2004+A1:2010

IEC 61000-4-5:2005/ EN 61000-4-5:2006

IEC 61000-4-6:2008/ EN 61000-4-6:2009

IEC 61000-4-11:2004/ EN 61000-4-11:2004

Compliance Information

Complies with the essential requirements of the following applicable European Directives, and carries the CE marking accordingly:

 Electromagnetic Compatibility (EMC) Directive 2014/30/EU  Low-Voltage Directive (Safety) 2014/35/EU

Conforms with the following product standards:

EMC Standard

1. The product is intended for use in non-residential/non-domestic environments. Use of the product in residential/domestic environments may cause electromagnetic interference.

2. Connection of the instrument to a test object may produce radiations beyond the specified limit.

3. Use high-performance shielded interface cable to ensure conformity with the EMC standards listed above.

Safety Standard

IEC 61010-1:2010/ EN 61010-1:2010

IT8500+ User’s Manual

Content

DC PROGRAMMABLE ELECTRONIC LOADS ................................................................................................ 1

QUALITY CERTIFICATION AND ASSURANCE ....................................................................................................................... 1

WARRANTY .............................................................................................................................................................. 1

LIMITATION OF WARRANTY .......................................................................................................................................... 1

SAFETY SYMBOLS ....................................................................................................................................................... 1

SAFETY PRECAUTIONS ................................................................................................................................................. 2

ENVIRONMENTAL CONDITIONS ...................................................................................................................................... 3

REGULATORY MARKINGS ............................................................................................................................................. 3

WASTE ELECTRICAL AND ELECTRONIC EQUIMENT (WEEE) DIRECTIVE .................................................................................... 3

COMPLIANCE INFORMATION ......................................................................................................................................... 5

CHAPTER1 INSPECTION AND INSTALLATION ...................................................................................................... 1

1.1 VERIFYING THE SHIP MENT ...................................................................................................................................... 1

1.2 INSTRUMENT SIZE INTRODUCTION ............................................................................................................................ 1

1.3 ADJUSTMENT OF LOAD HANDLE............................................................................................................................... 3

1.4 DISASSEMBLY OF LOAD HANDLE ............................................................................................................................... 4

1.5 RACK MOUNTING ................................................................................................................................................ 5

1.6 CONNECTING THE POWER CORD .............................................................................................................................. 5

CHAPTER2 QUICK START .................................................................................................................................... 6

2.1 BRIEF INTRODUCTION............................................................................................................................................ 6

2.2 FRONT PANNEL INTRODUCTION ............................................................................................................................... 7

2.3 VFD DI SP LAY ANNUNCIATORS ................................................................................................................................. 8

2.4 FRONT PANEL KEYS ............................................................................................................................................... 8

2.5 COMBINATION KEYS .............................................................................................................................................. 9

2.6 REAR PANNEL INTRODUCTION ............................................................................................................................... 10

2.7 POWER-ON SELFTEST .......................................................................................................................................... 11

CHAPTER3 FUNCTIONS AND CHARACTERISTICS .............................................................................................. 14

3.1 LOCAL MODE/REMOTE MODE .............................................................................................................................. 14

3.2 OP ER ATI ON MODE ............................................................................................................................................. 14

3.2.1 Constant Current Mode (CC) ............................................................................................................ 14

3.2.2 Constant Voltage Mode (CV) ............................................................................................................. 15

3.2.3 Constant Resistance Mode (CR) ...................................................................................................... 15

3.2.4 Constant Power Mode (CW).............................................................................................................. 15

3.3 INPUT ON/OFF CONTROL .................................................................................................................................... 16

3.4 SHORT-CIRCUIT ANALOG FUNCTION ....................................................................................................................... 16

3.5 SYSTEM MENU (SYSTEM) ..................................................................................................................................... 16

3.6 CONFIG MENU (CONFIG) ..................................................................................................................................... 17

3.7 TRIGGER FUNCTION ............................................................................................................................................ 19

3.8 TRANSIENT FUNCTION ......................................................................................................................................... 19

3.8.1 Continuous Mode ............................................................................................................................... 19

3.8.2 Pulse Mode ......................................................................................................................................... 19

3.8.3 Toggled Mode ..................................................................................................................................... 20

3.9 LIST OPE R ATI ON ................................................................................................................................................ 20

3.10 SAVING AND RECALLING SETTINGS ....................................................................................................................... 20

3.11 VON FUNCTION .............................................................................................................................................. 21

3.12 OCP OP ER AT IO N ............................................................................................................................................. 22

3.13 OPP OP ER AT IO N ............................................................................................................................................. 23

3.14 BAT TE RY TE ST.................................................................................................................................................. 24

3.15 CR-LED TEST FUNCTION ................................................................................................................................... 26

3.16 MEASUREMENT OF VOLTAG E RISE TIME................................................................................................................. 26

3.17 PROTECTION FEATURES ...................................................................................................................................... 27

3.17.1 Over Voltage Protection (OVP) ....................................................................................................... 27

3.17.2 Over Current Protection (OCP) ....................................................................................................... 27

3.17.3 Over Power Protection (OPP) ......................................................................................................... 28

3.17.4 Over Temperature Protection (OTP) .............................................................................................. 28

3.17.5 Reverse Voltage Protection (LRV) .................................................................................................. 28

3.18 KEY LOCK FUNCTION ......................................................................................................................................... 28

IT8500+ User’s Manual

3.19 THE TERMINALS ON THE REAR PANEL .................................................................................................................... 28

3.19.1 Remote Sensing ............................................................................................................................... 28

3.19.2 External Triggering ........................................................................................................................... 29

3.19.3 Current Monitoring (I Monitor) ......................................................................................................... 29

3.19.4Ripple Function .................................................................................................................................. 30

CHAPTER4 BASIC OPERATION .......................................................................................................................... 31

4.1 CONSTANT CURRENT OP E R AT I O N ........................................................................................................................... 31

4.2 CONSTANT VOLTA GE OP E R AT I ON ........................................................................................................................... 31

4.3 CONSTANT POWER OPERATION ............................................................................................................................. 32

4.4 CONSTANT RESISTANCE OPE R AT I O N ........................................................................................................................ 32

4.5 TRANSIENT TEST OP E R AT IO N ................................................................................................................................ 32

4.5.1 Continuous Transient Operation ....................................................................................................... 33

4.5.2 Pulse Transient Operation ................................................................................................................. 34

4.5.3 Toggle Transient Operation ............................................................................................................... 34

4.6 LIST OP ER AT IO N................................................................................................................................................. 35

4.7 TEST FILES ........................................................................................................................................................ 37

CHAPTER5 COMMUNICATION INTERFACES...................................................................................................... 42

5.1COMMUNICATION MODULES INTRUDUCTION ............................................................................................................ 42

5.2 COMMUNICATION WITH PC .................................................................................................................................. 43

5.3USB IN TE RFAC E.................................................................................................................................................. 45

CHAPTER6 SPECIFICATIONS.............................................................................................................................. 46

SPECIFICATIONS ....................................................................................................................................................... 46

SUPPLEMENTARY CHARACTERISTICS.............................................................................................................................. 54

APPENDIX ............................................................................................................................................................... 55

SPECIFICATIONS OF RED AND BLACK TEST LINES .............................................................................................................. 55

Inspection and Installation

The IT8500+ series include:

T8514C+/IT8514B+/IT8516C+

User may select an appropriate

Cord

It contains IT8500+ electronic load

documentations.

Ex-factory Test Report

It is the test report of the instrument before delivery.

Chapter1 Inspection and Installation

1.1 Verifying the Shipment

Unpack the box and check the contents before operating the instrument. If wrong items have been delivered, if items are missing, or if there is a defect with the appearance of the items, contact the dealer from which you purchased the instrument immediately. The package contents include:

Checkl i st o f P ackage Contents

Item Qty. Model Remarks

IT8511+/IT8511A+/IT8511B+/IT85

Electronic Loads x1 IT8500+ series

12+/IT8512A+/IT8512B+/IT8512C +/IT8512H+/IT8513A+/IT8513C+/I

IT-E171/IT-E172

Power cord

CD x1 -

NOTE

Upon verification of the shipment, keep the package and relevant contents thereof in a safe place. When returning the instrument for warranty service or repair, the specified packing requirements shall be met.

x1

x1 -

/IT-E173/IT-E17 4

1.2 Instrument Size Introduction

The instrument should be installed at well-ventilated and rational-sized space. Please select appropriate space for installation based on the electronic load size.

IT8500+ series electronic load different models are not the same size, the detail size of the electronic load are shown as below.

power cord that matches the specifications of power socket used in the area. See the Section Connecting the Power

for details.

User’s Manual, Programming Guide and other user

Inspection and Installation

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512B+/IT8512C+/IT8512H+ Model

Detialed Dimension Drawing

IT8513A+/IT8513C+ Model

Detailed Demension Drawing

Dimension: Width: 214.5mm Height: 88.2mm Depth: 354.6mm

Dimension: Width: 214.5mm Height: 88.2mm Depth: 453.5mm

Inspection and Installation

IT8514B+/ IT8514C+ Model

Detialed Dimension Drawing

IT8516C+ Model

Detailed Dimension Drawing

Dimension: Width: 436.5.5mm Height: 88.2mm Depth: 463.5mm

Dimension: Width: 482.5mm Height: 174.5mm Depth: 531.5mm

1.3 Adjustment of Load Handle

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C+/IT8512H /IT8513A+/IT8513C+ series loads are equipped with a handle for user to easily carry and place it.

Inspection and Installation

The load handle may be adjusted based on three methods (as shown in icons below). Be sure that appropriate force is applied to adjust the load handle to appropriate position.

1.4 Disassembly of Load Handle

Please disassemble the load handle before installing equipment on the support. Disassembly steps:

1. Adjust the handle to the position as shown in the figure below.

NOTE

To easily disassemble handle, align the locking mouth and locking device, which is between the handle and the instrument.

2. Align the locking mouth, and pull out the handle towards two sides.

NOTE

Do not use too much force and mind your hands during disassembly of load handle.

Inspection and Installation

IT-E172

E

N L

E

L N

E

N L

E

L N

1.5 Rack Mounting

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C+/IT8512H +/IT8513A+/IT8513C+ loads can be installed on standard 19-inch rack. ITECH provides user with IT-E151/IT-E151A rack, as an optional mount kit. The detailed operation please refer to the User Manual of your mount kit.

IT8514B+/IT8514C+/IT8516C+ need not mount on rack, they can installed on cabinet directly by screw.

1.6 Connecting the Power Cord

Connect the power cord after checking that the power switch of the instrument is turned OFF. Only use the power cord supplied as a standard accessory.

Select from the following Schedule of Power Cord Specifications an appropriate power cord that matches the voltage for the area in which you use the instrument. If the power cord included in the instrument you purchased does not match the voltage, contact the dealer or manufacturer for change.

China

IT-E171

United States &

Canada

Europe

IT-E173

England

IT-E174

Quick Start

Model

Voltage

Current

Power

Communication Interface

IT8511+

120V

30A

150W

DB9(TTL)

IT8511A+

150V

30A

150W

DB9(TTL)

IT8511B+

500V

10A

150W

DB9(TTL)

IT8512+

120V

30A

300W

DB9(TTL)

IT8512A+

150V

30A

300W

DB9(TTL)

IT8512B+

500V

15A

300W

DB9(TTL)

IT8512C+

120V

60A

300W

DB9(TTL)

IT8512H+

800V

5A

300W

DB9(TTL)

IT8513A+

150V

60A

400W

DB9(TTL)

IT8513C+

120V

120A

600W

DB9(TTL)

IT8514B+

500V

60A

1500W

USB/RS232

IT8514C+

120V

240A

1500W

standard USB/RS232

IT8516C+

120V

240A

3000W

Standard USB/RS232

Chapter2 Quick Start

This chapter introduces the front panel, the rear panel, key functions and VFD display function of the electronic load, make sure that you can quickly know the appearance, instruction and the key function before you operate the load, Help you make better use of this series of electronic load.

2.1 Brief Introduction

IT8500plus series DC electronic loads are single channel programmable electronic load which can provide multiple solutions according to the requirements of your design and test. This series have international advanced functions and features.

 High-visibility vacuum fluorescent display (VFD)  Measurement resolution: 0.1mV,0.1mA  Voltage and current Measurement speed: up to 40KHZ  Four operation modes:CV(Constant Voltage),CC,CR,CW  Battery test function  OCP test , OVP test  Auto test function:  Short circuit function  Remote Sense function  Memory capacity to save/recall setting parameters: 100 registers  Intelligent fans  Build-in Buzzer as alarm signal  Power off memory function  Rotary knob, making the operation more convenient  Measure test function,test the rising/dropping time of the voltage  List modes

Quick Start

IT8511+/IT8511 A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT8512C+/IT8512H+/IT8513A+/IT 8513C+ Model

Power switch

s function by key

Function key:

IT8514B+/IT8514C+ Model

Power switch

s function by key

Function key:

2.2 Front Pannel Introduction

IT8500+ series electronic load different models have different front pannels, the front panels and keyboards of different models are shown as below.

①

② vacuum fluorescent display (VFD) ③ Compound key and the local switch key ④ Number key:

Set the parameters value, achieve the menu’ combination

⑤

Set the operation mode Control the input state: On/Off

⑥ Direction function ⑦ Rotary knob ⑧ Input terminal

①

② vacuum fluorescent display (VFD) ③ Compound key and the local switch key ④ Number key:

Set the parameters value, achieve the menu’ combination

⑤

Set the operation mode Control the input state: On/Off

⑥ Direction function ⑦ Rotary knob ⑧ Input terminal

Quick Start

OFF

The load is off.

Error

An error has occurred.

CC

Constant current mode

Trig

Waiting for the trigger signal

CV

Constant voltage mode

Sense

Remote sensing is on.

CR

Constant resistance mode

Prot

OCP function is on.

CW

Constant power mode

Auto

Voltage range automatically seleted function is open

Rmt

Instrument is in the remote state.

Lock

The keyboard is locked.

Timer

LOAN ON is on.

Shift

Shift button has been pressed.

( Blue-green)

Shift button is a composite key.

IT8516C + Model

Power switch

s function by key

Function key:

①

② vacuum fluorescent display (VFD) ③ Com p ound key and the local switch key ④ Num ber key:

Set the parameters value, achieve the menu’ combination

⑤

Set the operation mode Control the input state: On/Off

⑥ Direction function ⑦ Rotary knob ⑧ Input terminal

2.3 VFD Display Annunciators

2.4 Front Panel Keys

Quick Start

Local button is used to switch local and remote mode.

Power on button

Decimal point

The escape key

OFF is high

impedance state).

[ Shift ]+ [ 1 ] (Short)

Turn short circuit on or off.

+ [ 2 ] (Tran)

+ [ 3 ] (List)

Set LIST operation parameters.

[ Shift ] + [ 4 ] (Save)

+ [ 5 ] (Battery)

Turn on or off battery testing function.

+ [ 6 ] (Prog)

Enter auto test function.

[ Shift ] + [ 7 ] (Info)

Display product’s Model/SN/Version.

+ [ 8 ] (System)

System menu setting

+ [ 9 ] (Config)

Configure menu setting

[ Shift ] + [ 0 ] (Pause)

Press this button if you need a pause when runing an auto test file.

+ [ ]

Cause an immediate trigger.

[ Shift ] + [ CC ] (OCP)

Enter OCP test function.

+ [ CV ] (Setup)

Set detailed parameters in CC/CV/CW/CRmode.

[ Shift ] + [ CW ] (OPP)

Enter OPP test function.

+ [ Enter ] (Recall)

Recall the DC Load state from non-volatile memory.

[ Shift ] + [ On/Off ] (Lock)

Key lock function

0

9

ESC

(Gray) (Gray-white)

~ Enter the digits 0 to 9.

Choose constant current mode. Choose constant voltage mode. Choose constant resistance mode. Choose constant power mode.

Enter the selected value or setting. Turns DC Load ON or OFF (

Scroll up key

Scroll down key

Scroll left and right key

2.5 Combination Keys

Press [ Shift ] button first and then other keys to achieve all kinds functions in the following table.

[ Shift ]

[ Shift ] [ Shift ]

Start or stop transient condition.

Store the DC Load state in non-volatile memory.

[ Shift ]

(Trigger)

[ Shift ]

Quick Start

IT8511+/IT8511A +/ IT8511B+/IT8512+/ IT8512B+/IT8512C+/IT8512H/IT8513A+/IT8513C+ Model

Thermal window Line voltage selection

3 pin IEC320 AC input connector

Current monitoring T erminal

IT8514B+/IT8514C+Model

Thermal window Line voltage selection

Current monitoring T erminal

2.6 Rear Pannel Introduction

IT8500+ series electronic load different models have different rear pannels, the rear panels and keyboards of different models are shown as below.

① ②

switch( 110V/220V )

③

① ②

switch( 110V/220V )

③3 pin IEC320 AC input connector

④

⑤9-Pin serial port interface connector ⑥4 pin trigger and remote sensing connector

⑤RS232 communication cable interface ⑥4 pin trigger and remote sensing connector

⑦USB communication cable interface

Quick Start

IT8516C+Model

Thermal window Line voltage selection

Current monitoring T erminal

0.0000V 0.0000A

OFF CC Auto

① ②

switch( 110V/220V )

③3 pin IEC320 AC input connector

④

2.7 Power-on Selftest

A successful test process indicates that the instrucment meets the factory specifications and can be operated well.

Before operation, please confirm that you have fully understood the safety instructions.

 To avoid burning out, be sure to confirm that power voltage matches with

supply voltage.

 Be sure to connect the main power socket to the power outlet of protective

grounding. Do not use terminal board without protective grounding. Before operation, be sure that the power supply is well grounded.

 To avoid burning out, pay attention to marks of positive and negative

polarities before wiring.

⑤RS232 communication cable interface ⑥4 pin trigger and remote sensing connector

⑦USB communication cable interface

Selftest steps

Normal selftest procedures:

1. Correctly connect the power cord. Press [ Power ] key to start up.

2. After selftest, VFD display information below.

0.00W CC=0.000A

Information description:

 The first line display actual voltage and current value.  The second line display the actual power value and the setting

current/voltage/power/resistance value

Quick Start

(220VAC)

Fuse specification

(110VAC)

 The third line display the input state/operation mode.

3. Press [ Shift ] + [ 7 ], VFD display products information. You can press

direction buttons to examine product’s model/SN/software version.

Error Information References

The following error information may occur when an error occurs during Power On self-test:

 If the EEPROM was damaged, the VFD will display “Eeprom Fail”.  If the lastest operation data in EEPROM is lost, then VFD will display

“Config Data Lost”.

 If the calibration data in EEPROM is lost, then VFD will display “Cal data

lost”.

 If the system setting data in EEPROM is lost, the VFD will display “Eeprom

data lost”.Please press [ Shift ] + [ 4 ] and [ 0 ] to save after setting parameters.

Exception handling

If the electronic load cannot start normally, please check and take measures by reference to steps below.

1. Check whether the power line is correctly connected and confirm whether

the electronic load is powered. Correct wiring of power line => 2 Incorrect wiring of power line => Re-connect the power line and check whether the exception is removed.

2. Check whether the power in On.[ Power ] key is under “ ” On

status. Yes => 3 No => Please check the [ Power ] key to start power and check whether the exception is removed.

3. Check whether set power voltage of electronic load is larger than the power

supply voltage. If set power voltage is 220 V and the supply voltage is 110V, the electronic load cannot start.

4. Check whether the fuse of electronic fuse is burned out.

If yes, change fuse. Detailed steps:  Pull out power line and take out the fuse box at power line jack with a

small screw driver. As shown below.

 If the fuse is fused, please change fuse of same specification based on

machine m odel. See the table blow for matching information of fuse and machine model.

Model

Fuse specification

IT8511+ T0.5A 250V T1.25A 250V IT8511A+ T0.5A 250V T1.25A 250V IT8511B+ T0.5A 250V T1.25A 250V

Quick Start

Fuse specification

(110VAC)

Model

Fuse specification

(220VAC)

IT8512A+ T0.5A 250V T1.25A 250V

IT8512A+ T0.5A 250V T1.25A 250V IT8512B+ T0.5A 250V T1.25A 250V IT8512C+ T0.5A 250V T1.25A 250V IT8512H+ T0.5A 250V T1.25A 250V IT8513A+ T1.25A 250V T2.5A 250V IT8513C+ T1.25A 250V T2.5A 250V IT8514B+ T1.25A 250V T2.5A 250V IT8514C+ T1.25A 250V T2.5A 250V IT8516C+ T2.5A 250V T5A 250V

 After replacement, install the fuse box back to original position, as

shown below.

Functions and Characteristics

Chapter3 Functions and Characteristics

This chapter elaborates on the functions and characteristics of electronic loads.Contents following sections:

 Switching of local/remote operation modes  Constant-status operation mode  Input On/Off function  Keyboard locking function

 Short -circuit analog function  System setup function

 Triggering function  List mode  Test function  Save/Recall  VON function  Full protection function,OCP,OVP,OTP,OPP,Reverse voltage  Remote Sense function  Current monitoring function

 Ripple function

3.1 Local Mode/Remote Mode

There are two types of control modes for IT8500+ series products:Local mode and Remote mode.

In remote mode, you can operate the electronic loads through PC v ia communication cable(optional). While After power on electronic loads, it defaults in local mode and all buttons are avaiable in this mode.In remote control mode, the keys on the front pannel can not work except local key.Customers could through [ Local ] key to switch the control mode.

3.2 Operation Mode

There are four operation modes of IT8500+ series products:

 Constant current mode (CC)  Constant voltage mode (CV)  Constant resistance mode (CR)  Constant power mode(CW)

3.2.1 Constant Current Mode (CC)

In constant current mode, the DC load will comsume a constant current, regardless of the voltage at its terminals.

Functions and Characteristics

Load current

Input voltage

I V

Slope is equal To the setting resistance

CR mode

Input voltage

I

V

Setting voltage

CV mode

Load current

Input voltage

I V Setting current

CC mode

Diagram 3-1 I-V curve in CC mode

3.2.2 Constant V oltage Mode (CV)

In constant voltage mode, the DC load will cause a constant voltage to appear at its terminals.

Input current

Diagram 3-2 I-V curve in CV mode

3.2.3 Constant Resistance Mode (CR)

In constant resistance mode, the DC load will behave as a fixed resistance value.As shown below,the load linearly changes the current value with the rising of input voltage.

3.2.4 Constant Power Mode (CW)

Diagram 3-3 I-V curve in CR mode

In constant power mode,the DC load will cause a constant power to be dissipated in the load.As shown below,the load current is decreasing with the rising of input voltage,while power always maintain the setting value.

Functions and Characteristics

POWER-ON

Power on state of instrument

RST(default)

Do not remember state in SAVE 0.Customer can save the DC load next time.

SAV0

Remember state in SA VE 0

BUZZER

ON(default)

Enable audible beep when key is pressed

OFF

No sound when key is pressed

KNOB

Diagram 3-4 I-V curve in CP mode

3.3 Input On/Off Control

[ On/Off ] button on the front panel is used to manually toggle the instrument

between its set mode and an infinite impedance state, i.e control input on and off. [ On/Off ] button lighted indicates the load input is on, meanwhile the [ OFF ] indicator will disappear.

3.4 Short-circuit Analog Function

Short circuit simulation and short circuit current measurement:you may press [ Shift ] + [ 1 ] botton to emulate a short state.It can be used to check whether the tested instrument’s short protection is avaiable.

In short mode,the DC load will draw maximum current from the DC supply in any of the four operation modes(CC,CV,CW or CR).In CC,CV,or CR mode,you may press [ Shift ] + [ 1 ] to stop short.The DC load will return to its previous operation.However,in CW mode,the short current will continue to be drawn.To stop the short,you must press the [On/Off] key after you press [ Shift ] + [ 1 ].

When emulating a Short in CC, CW or CR mode, the maximum allowable short current is equal to the 110% of c urrent range. Under CV mode, short circuit current is equivalent to that constant voltage value of load is 0 V.

3.5 System Menu (System)

Press [ Shift ] + [ 8 ] (system) to enter the system menu.

POWER-ON

a often used data in SAVE 0 to recall when power on

BUZZER

KNOB

Functions and Characteristics

UPDA TE(default)

The value modified with knob during operation will be

the setting

OLD

As explained above, after the DC load is turned on with knob.

SOURCE

Set trigger mode

MANUAL(Def)

Triggered from the

+ [ ] key

EXTERNAL

Triggered from a TTL high signal at the trigger connector on rear panel

BUS

Triggered from a serial bus command 5AH

HOLD

Receving a command 9DH

MEMORY

Recall the prestored datas

GROUP= 0

0:indicates1-10 group;1:indicates 11-20group, by parity of reasoning

DISP-TIMER

Timer function

ON

Enable timer function

OFF(default)

Disable timer function

RS-232

4800_8N 1

Baudrate 4800, data bit 8, n one parity, stop bit 1

9600_8N 1

Baudrate 9600, data bit 8, none parity, stop bit 1

19200_8N 1

Baudrate 19200, data bit 8, none parity, stop bit 1

38400_8N 1

Baudrate 38400, data bit 8, none parity, stop bit 1

SCPI

Select SCPI protocol

FRAME

Select FRAME protocol

ADDRESS= 0

Set the instrument’s address(0~31)

RUN

Runing mode at power on

NORMA L

Normal mode

BATTERY

Default in battery test mode at power on

PROG_TEST

Default in autotest mode at power on

OCP_TEST

Default in OCP test mode at power on

OPP_TEST

Default in OPP test mode at power on

DEFA ULT

NO

Do not return instrument to factory default settings.

YES

Retrun instrument to factory default settings

saved after load is off.For example; the DC load is set to 1A by press [CC] and turned on the input.Then increase the setting value to 2A with knob.When customer turn off load and trun on again, value changes to 2A.

again,the setting value is 1A instead of 2A changed

[ Shift ]

TRIGGER

MEMORY

DISPLA Y

RS-232

PROTOCOL

ADDRESS

RUNMODE

DEFAULT

3.6 Config Menu (Config)

PROTECT

Press [ Shift ]+ [ 9 ] (Config) to enter the menus.

Max-P Set hardware power protection

MAX POWER=150.00W Set hardware OPP value

Functions and Characteristics

A-LIMIT Set software current protecting state A-LIMIT

ON Enable software over current protection function A-LIM POIN=30.000A Set the software OCP level A-LIM DELAY=3S Set the OCP delay time OFF Disable the software OCP funtion

P- LIMIT Set software power protecting state. P-LIM POIN=150.00W Set the software OPP level.

P-LIM DELAY=3S Set the OPP delay time. TIMER Set load on timer

LOAD-TIMER ON Enable load-on timer LOAD-TIMER=10.0S Set the load on time(0.1S~9999.9S)

OFF Disable load on timer V-RANGE Voltage auto-rangefuntion

MEASURE

CR-LED

SENSE

V-RANGE ON Enable voltage auto range function OFF Disable voltage auto range function

FILT ER Set the filter parameter FILTER COUNT = 2^14 Filter count set, range 2~16

TIME-V1 TIME-VOLT1=0.000V Set the start time, to measure the voltage rise/fall time. TIME-V2

TIME-VOLT2=120.00V Set the end time, to measure the voltage rise/fall time CR-LED Imitate LED (in CR mode)

ON

Open the function(in CR mode,press [ Shift ]+ [ CV ] to set Vd value)

OFF Disenable the function REM- SENSE Remote sense function ON Enable remote sense function

OFF Disable remote sense function VON Set the load’s VON point LIVING VON point living state

VON

VON POINT = 0.10V Set the VON value LAT CH VON point latch state, ON /OFF

VON POINT = 0.10V Set the VON value RESET Reset the config menu

RESET

NO Do not reset YES Reset

Functions and Characteristics

3.7 Trigger Function

Triggering is used with the transient operation; list operation and test function.There are four types of triggers you can use for IT8500+ products.

Manual: An immediate trigger is created by pressing [ Shift ]+ [ ] (Trigger) on the front panel.

External(TTL signal): An external trigger is a TTL low signal applied to the trigger connection on the rear panel.This TTl signal must last for more than 10us.

Bus: The instrument will be triggered if command 5AH is sent via the communication interface.

Hold: The instrument will be triggered if command 9DH is sent via the communication interface.

3.8 Transient Function

The transient test allows switching between two different load values.A common application is to test the dynamic characteristics of DC source.

There are three different types of transient operation: continuous, pulse,

toggled.

3.8.1 Continuous Mode

In continuous transient operation, the load is continuously switched between two load values.An example is shown in the following figure:

3.8.2 Pulse Mode

In pulse operatrion,the load operates at the A value that has been entered until a trigger is received.At the trigger,the load switches to the B value and stays at that level for the B timing value.Then the load switches back to the A value and stays there until another trigger is received.

Functions and Characteristics

10A

5A

TRG

Toggled Transient Operation

Trigger

10 2 3 4 5

List count=1 List count=2

List sequence

3.8.3 Toggled Mode

In toggled transient operation,the load starts at the stored parameters for the mode.When a trigger is received,the load switches to B value.When another trigger is received,the load switches to the A level.It stays at the A value until another trigger is received,at which point it switches to the B value.Here’s an example:

3.9 LIST Operation

List mode allows you to generate a complex current sequence. Moreover, the mode.

change can be s ynchronized with an internal or external signal, to accomplish dynamic and precise test A list file includes following parameters: file name,

step counts (range 2-84), time width of single step(0.00005s~3600s),step value and slope.The edited list file can be saved in nonvolatile memory, can be

recalled easily.The DC load provides 7 nonvolatile registers to save list files for recall later.

In list mode,the DC load start to run the list file once receiving a trigger signal, continue to run once receiving another trigger signal.To illustrate the use of a list,we’ll create a list that runs the following constant current profile on a power supply:

3.10 Saving and Recalling Settings

We can save some often-used parameters in the non volatile memory, including working mode, voltage/current value and so on.IT8500plus series provide 100 non-volatile registers.

They are divided into 10 Memory groups: Group0-9.You can set it in the system

menu.Group0 means you can save and recall parameters in 0-10 registers.

Functions and Characteristics

Group1 means you can save and recall parameters in 11-20 registers. Group2-Group9 can be concluded in the same manner.

Save and Recall operation

For example: the instrucment works in CC mode, setting value is 1A, Memory Group is 6. Save “CC 1A” in the 61th register and then recall.

1. Set the parameters ok. To save the instrument's settings to a register, press [ Shift ]+ [4] (Save). Enter number [6] and [1].

2. Then press [Enter], The setting is saved.

3. To recall the instrument's settings from a register, press [ Shift ]+ [Enter] (Recall).

4. Enter [1].Then the setting is recalled.

NOTE

Saving operation will overwrite any values previously saved in that register. Recalling operation will light the Enter . You should press [ESC] to escape the recalling state

before setting other parameters.

3.11 VON Function

The DC load can be set to only turn on if the voltage is above a set value(VON set) under configure menu by pressing [ Shift ]+ [9].There are two types of VON function:Living and Latch.The following will have detailed description for the two types.

NOTE

VON set is used to ensure an electronic system under test will not have power applied unless the supply voltage is above a certain value.If you have no such testing request, do not set this value arbitrarily.If your instrument can not work normally, for example, set CC=1A, after turn on the input while the current is still 0A instead of setting value 1A, then you should check VON set firstly.If VON set is not 0V, then please modify to 0V.

VON LIVING MODE In Living mode, when power is applied to the DC load, the voltage must rise

above VON setting before the load draws current from the source.If the voltge below VON setting on the load’s terminals, the load will turn off input.

Functions and Characteristics

OCP TEST

1.VON LEVEL=0.000V

Set Voltage threshold

2.VON DELAY=0.00S

After delay certain time,the DC load starts to draw current.

3.RANGE=3.000A

Set current range

4.STAR T=0.1000A

Set start current

5.STEP=0.1000A

Set step current

6.STEP DEL=0.20S

Set delay time of each step

7.END=2.0000A

Set end current

8.OCP VOL T=2.000V

Set OVP value

9.MAX TRIP =1.5000A

Upper limit of OCP value

10.MIN TRIP=0.9000A

Lower limit of OCP value

SAVE OCP FILE=1

Save OCP test file (1-10)

Operation

Display on front pannel

0.0000V 0.000A

VON LATCH MODE In Latch mode,as before,the load will turn on only when the voltage exceed

VON setting,but once on,it will now stay on,even if the voltage drops to zero.

3.12 OCP Operation

OCP test process: After input voltage reaches VON point,the DC load start to

draw a current from the source after a delay time.The current value will increase by a certain step size at regular intervals.Simultaneously, the DC load will judge whether the input voltage is lower than OCP voltage you’ve set.If it is,then the present current value will be compared to see if it is in the current range you’ve set,in this range,the OCP test will Pass or fail.On the contrary,the DC load will continue to increase drawing current and compare the voltage.

To start an OCP test,press [ Shift ]+ [ ] (Trigger). Press [ Shift ]+ [ CC ] (OCP) to enter OCP operation.

EDIT

Set the power on mode to be OCP test mode:

1.Press [ Shift ]+ [ 8 ] (system) enter into sysmtem menu

POWER-ON BUZZER

Functions and Characteristics

2.Press right key,select RUNMODE and confirm

[ Enter ]

0.0000V 0.000A RUN <NORMAL

3.Press direction key to select OCP_TEST,Press

0.0000V 0.000A

4,Press [ Esc ] button to quit the set.

0.0000V 0.000A

OPP TEST

STOP

Run OPP test file

OPP TEST

Recall OPP File=1

Recall OPP test file(range file1-file10)

OPP TEST

1.VON LEVEL=0.000V

Set Voltage on value

2.VON DELAY=0.01S

Set Voltage on delay time

3.RANGE=5A

Set working current range

4.START =0.1W

Set start power value

5.STEP =1W

Set step power value

6.STEP DEL=1S

Set step delay time

7.END =12W

Set cut-of f power value

8.OPP VOL T=7V

Set OPP value

9.MAX TRIP =6.5W

Upper limit of OPP value

10.MIN TRIP =5.6W

Lower limit of OPP value

SAVE OPP FILE=1

Save OPP test file

Operation

Display on front pannel

1.Press [ Shift ]+ [ 8 ] (system) enter into

0.0000V 0.000A

2.Press right key,select RUNMODE and confirm with [ Enter ] button

0.0000V 0.000A RUN <NORMAL

with [ Enter ] to confirm.

button

After above steps,press [ ] (Trigger) button to run ocp test file.

Recall OCP File:

1. Press [ Shift ]+ [ Enter ] button to select programe file,the panel displays “CALL OCP FILE= 1.Enter the file name(1-10),press [ Enter ] button to confirm.

2. According to the following steps to escape OCP mode:press [ Shift ]+ [ 8 ] (system)------“RUNMODE”-----[Enter]-------select “NORMAL”mode----[ Enter ].

3.13 OPP Operation

OPP test process:When the input voltage has reached VON point, power will

begin to work after a delay time.The power value will increase by a step size at regular intervals.Simultaneously,the DC load will judge wether the input voltage is lower than OPP voltage(you need to set).If it is,then the present current value will be compared to see if it is in the current range you’ve set,in this range,the OPP test will Pass or fail.On the contrary,the power will continue to increase within the cut-off current range.And then compare OPP voltage with input voltage too.

RUN <OCP_TEST

STOP 0.000A

OPP TEST

To start a OPP test, press [ Shift ]+ [ ] (Trigger). Press [ Shift ]+ [CW] (OPP) to enter OPP test operation.

RUN

CALL

EDIT

Set the power on mode to be OPP test mode

sysmtem menu

POWER-ON BUZZER

Functions and Characteristics

3.Press direction key to select

0.0000V 0.000A

4,Press [ Esc ] button to quit the set.

0.0000V 0.000A

Step

Operation

Display

1

Press

(Battery),set current range

0.0000V 0.000A RANGE = 0.00A

2

Set discharge current,for example 2A

CURRENT = 2.000A

3

Set the stop voltage,for example 2V, then press

[ Enter ] to confirm.

STOP VOLT=2V

4

Set the stop capability to maximum 999.999AH,

[ Enter ]

STOP CAP=999.999AH

5

Set the stop timer to maximum 99999S, press

[ Enter ] to confirm.

STOP TIMER=99999S

6

Save the battery test to specified file

0.0000V 0.000A SAVE BATT FILE 1(1-10)

6

Press [ Enter ] to confirm

0.0000V 0.000A

Off cc

Step

Operation

Display

1

Press

(Battery),set current range

0.0000V 0.000A RANGE = 0.00A

2

Set discharge current,for example 2A

CURRENT = 2.000A

3

Set the stop voltage to 0V, then press [ Enter ] to confirm.

STOP VOLT=0V

4

Set the stop capability, for example,7AH,then press [ Enter ] to confirm.

STOP CAP=7AH

5

Set the stop timer to maximum 99999S, press

STOP TIMER=99999S

OCP_TEST,Press [ Enter ] to confirm.

After above steps,press [ ] (Trigger) button to run OPP test file.

Recall OPP File

1. Press [ Shift ]+ [ Enter ] button to select programe file,the panel displays “CALL OPP FILE= 1.Enter the file name(1-10),press [ Enter ] button to confirm.

2. According to the following steps to escape OPP mode:press [ Shift ]+ [8] (system)------”RUNMODE”----[ Enter ]------select“NORMAL”mode----[ Ente

r ].

3.14 Battery Test

IT8500plus series products test the battery capability in CC/CW/CR mode. The test m ode should be set first, and then the discharge stop conditions.

There are three discharge stop conditions to be set for IT8500 plus series products. When user only need to do battery testing in one or two stop conditions, the other conditions should be set to the specified value (STOP VOLT:0V;STOP CAP:999.999AH;STOP TIMER:99999S). When the system checks the discharging time or battery voltage or capacity is equal to the setting stop value or under an insecurity state, the battery test will stop, and the E-Load will turn off. The battery voltage, discharge current, discharge time and discharged capability are displayed on the VFD while testing.

RUN <OPP_TEST

STOP 0.000A

Take CC mode for example, the operations are as below:

( 1 )Voltage-threshold Cut Off

[ Shift ]+ [ 5 ]

press

(2)Capacity-threshold Cut Off

[ Shift ]+ [ 5 ]

to confirm.

0.00W I = 2.00A

Functions and Characteristics

[ Enter ] to confirm.

6

Save the battery test to specified file

0.0000V 0.000A SAVE BATT FILE 1(1-10)

7

Press [ Enter ] to confirm

0.0000V 0.000A Off cc

Step

Operation

Display

1

0.0000V 0.000A RANGE = 0.00A

2

Set discharge current,for example 2A

CURRENT = 2.000A

3

Set the stop voltage to 0V, then press [ Enter ] to confirm.

STOP VOLT=0V

4

Set the stop capability to maximum 999.999AH, press [ Enter ] to confirm.

STOP CAP=999.999AH

5

Set the stop timer, for example, 3800S, press

[ Enter ] to confirm.

STOP TIMER=3800S

6

Save the battery test to specified file

0.0000V 0.000A SAVE BATT FILE 1(1-10)

7

Press [ Enter ] to confirm

0.0000V 0.000A Off cc

Step

Operation

Display

1

Press

(Battery),set current range

0.0000V 0.000A RANGE = 0.00A

2

Set discharge current,for example 2A

CURRENT = 2.000A

3

Set the stop voltage as needed,for example,2V,then press [ Enter ] to confirm.

STOP VOLT=2V

4

Set the stop capbility as needed,for example,7AH,then press [ Enter ] to confirm.

STOP CAP=7AH

5

Set the stop timer as needed,for example,3800S,then press [ Enter ] to confirm.

STOP TIMER=3800S

6

Save the battery test to specified file

0.0000V 0.000A SAVE BATT FILE 1(1-10)

7

Press [ Enter ] to confirm

0.0000V 0.000A Off cc

Operation

Display on front pannel

1.Press [ Shift ]+ [ 8 ] (system) enter into

0.0000V 0.000A

2.Press right key,select RUNMODE and confirm with [ Enter ] button

0.0000V 0.000A RUN <NORMAL

3.Press direction key to select

0.0000V 0.000A

4,Press [ ESC ] button to quit menu set

0.0000V 0.000A

0.00W I = 2.00A

(3)Time-out Cut Off

Press [ Shift ]+ [ 5 ] (Battery),set current range

0.00W I = 2.00A

(4) Any of the Three Conditions Cut Off

[ Shift ]+ [ 5 ]

(5)Go into Battery Test Mode

sysmtem menu

0.00W I = 2.00A

POWER-ON BUZZER

OCP_TEST,Press [ Enter ] to confirm.

(6)Start Battery Test

Press [ ] (trigger) to provide a signal to start battery test.The discharing process will be auto terminated when stop conditions are reached.

(7)Recall Battery File

Press [ Shift ] + [ Enter ] button to select programe file,the panel displays “RECALL BATTERY 1.Enter the file name(1-10),press [ Enter ] button to

RUN <BATTERY

0S 0.000AH

Functions and Characteristics

confirm.

(8)Pannel Locked in case of Error Operations

Press button is enabled. According to the following steps to escape OPP mode: Press

[ Shift ]+ [ On/Off ] (Lock) button to lock the panel.In this mode,only [ Shift ] and [ On/Off ]

[Shift ]+ [ 8 ] (system)---”RUNMODE”---[ Enter ]----select “NORMAL” mode---[ Enter ]

3.15 CR-LED Test Function

With adding of diode break-over voltage setting in the IT8500+ series electronic load under conventional CR mode, the electronic load only works when voltage applied at its both ends is higher than the diode break-over voltage to give a real simulation of diode working principle, i.e., the ripple current at real LED test.

Detailed steps of LED power test:

1. Start CR-LED Function

Press [Shift] + [9] keys to enter configuration menu. Press Right Key and select “CR-LED”. Press [Enter] key for entry. Select “on” and press [Enter] key. Press [ESC] key to exit.

2. Set CR Mode and Resistance Value

Press [CR] key and set corresponding constant resistance (as R calculated below).

3. Set Vd Value

Press [Shift] + high=130V, low=0V, which may remain the original values. Vd will be set based on the calculation below.

Calculation method of Vd and R: Vd=V*0.8 R=0.2V/I Where:  V: constant working voltage of load LED of LED constant current

source;

 I: output current of LED constant current source;  Vd: break-over voltage of diode (string);  R: constant resistance;

[CV] keys for a series of related setting: range=7500.0,

3.16 Measurement of Voltage Rise Time

The IT8500+ series electronic load is provided with special v oltage rise/drop time measurement function. This function gives a simple analog of voltage rise/drop speed of oscilloscope test power.

Operation methods:

Set initial Voltage and Final Voltage

1. Press [Shift] + [9] keys to enter configuration menu. Press Right key. Select “Measure” and press [Enter] key.

2. Press [ ] to select “TimeV1”. Press [Enter] key. Press numeric keys to set initial voltage value and press [Enter] key.

3. Press [ ] to select “TimeV2”. Press [Enter] key. Press numeric keys to set final voltage value and press [Enter] key.

4. Press [ESC] to exit setting.

Start timer function

Functions and Characteristics

OFF CC

5. Press [Shift] +[8] keys to enter system menu. Press Right key till “Displ” flicks and press [Enter] key.

6. Press [ ] key to select “On”. Start timer function and press [Enter] key.

7. Press [ESC] to exit setting.

8. VFD second line will display time 0.0000S between power value and set value.

0.0001V 0.0002A

0.00W 0.0000S CC=0.000A

Measurement of Rise Time

9. Connect DC power to be tested to the input terminal of the electronic load. The power is set with a value that is higher than the set final voltage value. Keep power output in OFF status.

10. Set a constant current value on the load and open the load input.

11. Open power output.

12. The electronic load timer starts timing. After ending, time will keep stable, which is rise time of voltage.

13. Close the power output. The electronic load VFD will display voltage drop time.

3.17 Protection Features

DC load protection features include: OVP, OCP, OPP, OTP, reverse voltageprotection(LRV/RRV).

3.17.1 Over Voltage Protection (OVP)

If input voltage exceeds the voltage limit set by the user, the DC load will turn the input OFF and the buzzer will sound. The display will show OVP.

Operations to clear the OVP state Disconnect the instrument under test. Press any key on the front panel, the

OVP on the VFD will disappear, then the DC load exits OVP protection state.

3.17.2 Over Current Protection (OCP)

The DC load includes both hardware and software over current protection features.

Hardware OCP: maximum input current of the DC load will be limited at about 110% of the current range, once the hardware OCP is activated, the status register’s OC bit will be set; when the hardware OCP is removed, the status register’s OC bit will be reset. Hardware over current protection won’t change the DC load’s On/Off state.

Software OCP: users can set the DC load’s software OCP value, steps: [Shift] +[9] > Protect > Alimit set ON, Apoint set OCP current value, Adelay

set delay time before alarm. When the software OCP function is actived, the DC load will automatically turn off, VFD displays OCP.

Operations to clear the OCP state Disconnect the instrument under test. Press any key on the front panel, the

OCP displayed on the VFD will disappear, the DC load exits OCP protection

state.

Functions and Characteristics

3.17.3 Over Power Protection (OPP)

The DC load includes both hardware and software OPP features. Hardware OPP: the DC load allows user to set a power protection limit in

hardware which will limit the power in the range you set when the OPP occur. The hardware OPP protection will not change the ON/OFF state of the the DC load.

Software OPP: users can set the DC load’s software OPP value, steps: [Shift] +[9] > Protect > P-LIMIT > P-LIM POIN set OPP power value, P-LIM DEL AY set alarm delay. If the the DC load’s power value reach OPP limit and after the delay time, the DC load will automatically turned off, VFD will display OPP.

Operations to Clear the OPP State

Disconnect the instrument under test. Press any key on the front panel, the

OPP displayed on the VFD will disappear, the DC load exits OPP protection

state.

3.17.4 Over T emperature Protection (OTP)

If internal temperature exceeds safety limits(85℃ ;185 °F), the Over temperature circuitry will be activated. The DC Load will turn off the input, the buzzer will sound, and the display will show OTP.

Operations to Clear the OTP State

When the DC load temperature drops to the protecting point, press any key on the front panel, the OTP) displayed on the front panel will d isappear, the DC load exits OTP protection state.

3.17.5 Reverse Voltage Protection (LRV)

This feature protects the DC load in case the DC input terminals are connected to a power source with reversed polarity. If a reverse voltage condition is detected, the buzzer will sound and will be displayed on the VFD.

Operations to Clear the Reverse Voltage State

Check whether the connection is reversed; if so disconnect the power source.

3.18 Key Lock Function

Press [Shift] +[On/Off] (Lock)key to lock the front panel keys,VFD will display a Lock label.In this state,setting values can not be modified,woriking mode can not be changed.Press [Shift] +[On/Off] (Lock)again will disable this function.

3.19 The Terminals on the Rear Panel

3.19.1 Remote Sensing

Remote sensing is used to counteract the effect of lead resistance. For example, if you connect a power supply to the DC Load, the voltage at the power supply's terminals will not be the same as the voltage at the DC Load's terminals if there is a current flowing because of the finite resistance from the wires. Using remote sensing, you can sense the voltage at the power supply's terminals, effectively removing the effect of the voltage drop in the connection wire.

When using remote sensing, the power displayed by the instrument includes both the power dissipated inside the instrument and the power dissipated in the

Functions and Characteristics

leads from the power supply to the DC Load's input terminals.  Steps to enable remote sensing in the menu:

1. Press [Shift] +[9] key into the menu

2. VFD displays > , press [Enter] key to confirm

3. Press [ ] to choose > , press [Enter] key to confirm

4. Press [ ] to choose >, press [Enter] key to confirm, then remote sense function has been set, and VFD display indicator.

Remote Sensing: SENSE (+) and SENSE (–) are the remote sensing inputs. By eliminating the effect of the inevitable voltage drop in the DC load leads, remote sensing provides greater accuracy by allowing the DC load to regulate directly at the source's output terminals.

Wiring Diagram for Remote Sensing:

3.19.2 External Triggering

EXTERNAL:An external trigger is a TTL low signal applied to the Trigger

connection on the back panel. This TTL signal must last for more than 5 ms. A trigger applied to this input can be used to change settings (voltage, current , resistance), toggle between settings in transient- toggle mode, or generate a pulse in pulse mode.

Operation to select the trigger source as external:

[Shift] +[8] (system)to enter the menu,use [ ] to select TRIGGER,press [Enter],and then select EXTERNAL.Press [ESC] to exit the menu.

3.19.3 Current Monitoring (I Monitor)

Current monitoring terminal will output 0-10V analog signal to corresponding to 0 to full range of input current. You can connect an external voltmeter or an oscilloscope to display the input current’s changing

Functions and Characteristics

3.19.4Ripple Function

IT8500plus series DC electronic loads have test ripple function.You can read ripple voltage and ripple current by sending instructions.See in IT8500+ programming guide.

Basic Operation

Step

Operation

VFD Display

1

RANGE=30.000A

2

Set the current range,press

[Enter] to confirm

RANGE =10.000A

3

Press [Esc] to escape.

HIGH=120.00V

Steps

Operation

VFD Display

1

RANGE=120.00V

2

Set the voltage range, press

[Enter] to confirm

RANGE=10.00V

3

Press [Esc] to escape.

HIGH=30.000A

Chapter4 Basic Operation

4.1 Constant Current Operation

(Set the current from 0 to the current limit) There are three ways to set the current value:

1. In CC mode, rotate Rotary knob.

2. In CC mode, input value through number keys directly , press [Enter] to

confirm.

3. In CC mode, move the cursor to change the step value by pressing the

[ ], and then adjust the current by pressing the [ ].

To set current range, follow the steps:

Press [CC], and then [Shift]

+[CV] (Setup).

Note: when you set the current range to lo w range(within 3A),the resolution of current will rise.

4.2 Constant Voltage Operation

(Set the voltage from 0.1V to the setting voltage limit) There are three ways to change the voltage:

1. In CV mode, rotate Rotary knob.

2. In CV mode,input value through number key boards directly,press [Enter]

to confirm

3. In CV mode, move the stepping cursor by pressing [ ], and then

adjust the voltage by pressing [

To set voltage range, follow the steps:

Press [CV], then [Shift] +[CV].

].

Note: When you set the voltage range to low range,the resolution of voltage will rise.

Basic Operation

Steps

Operation

VFD Display

1

Press [CW], then

.

RANGE=150.00W

2

Set the power range,press [Enter] to confirm

RANGE =100.00W

3

Press [Esc] to escape.

HIGH=120.00V

Steps

Operation

VFD Display

1

(Setup).

RANGE=7500.0Ω

2

Set the resistance range,press [Enter] to confirm

RANGE =2000Ω

3

Press [Esc] to escape.

HIGH=120.0V

4.3 Constant Power Operation

(Set a value from 0 to upper limit of power) There are three ways to set the power value:

1. In CW mode, rotate Rotary konb.

2. In CW mode, input value through number key boards directly,press [Enter]

to confirm

3. In CW mode, move the stepping cursor by pressing [ ], and then

adjust the power by pressing [ ].

To set power range, follow the steps:

[Shift] +[CV]

4.4 Constant Resistance Operation

(Allowed setting range is 0.05Ω to 7500Ω) There are three ways to set the resistance value:

1. In CR mode, rotate Rotary knob.

2. In CR mode, input value through number key boards directly,press [Enter]

to confirm

3. In CR mode, move the stepping cursor by pressing [ ], and then

adjust the resistance by pressing [ ]

To set resistance range, follow the steps:

Press [CR], then [Shift] +[CV]

4.5 Transient Test Operation

Transient operation enables the DC load to periodically switch between two levels.

To edit a transient test file, related parameters need to be set: A level, B level, time width (only in pulse mode), frequency, duty and running mode (Continuous/Pulse/Toggled). If in CC dynamic mode, user can set current rising and falling slope additionally.

Following is an example to illustrate the three transient operations.

Basic Operation

Steps

Operation

VFD Display

Press [Shift]+[2] (Tran), move

[Enter] to confirm.

TRAN ON OFF

to select

ation mode as

indicator lamp

Trig will be lighted)

MODE CONTINUOUS >

Set the rising slope,press [Enter] to confirm

UP=1A/uS

Set the descending slope,press

[Enter] to confirm

DOWN=2/uS

Set level A,press [Enter] to confirm

LEVEL A=5A LEVEL B=10A

Set the frequency ,press [Enter] to confirm

FREQUNCE=50HZ(0.01-10000HZ)

Set the dutyfactor,press [Enter] to confirm

DUTY=98%(%0.1-99.9%)

Open the transient test function,

[Enter]

TRAN ON OFF

Then the VFD will display TRAN A

10.0000V 0.0000A Trig

(Trigger) to trigger

quit the transient test,if you

4.5.1 Continuous Transient Operation

Press [Shift] +[2] (Tran) to enter the transient operation setup menu:

1

2

3 4 5

6 7

8

9

10

[ ] key to select ON., press

Preess [ ] transient oper

CONTINUOUS (the

Set level B,press [Enter] to confirm

mentain on the “on”selection, press

to confirm.

and Trig

0.00W TRAN. 0

11

12

Turn on the load, press [Shift]+[ ]

Press anyone of [CC/CV/CW/CR] button can want to continue the test again, please repeat 1-11 steps

Basic Operation

Steps

Operation

VFD Display

1

Press

(Tran),

key to

to confirm.

TRAN ON OFF

2

to select

transient operation mode lamp Trig will be lighted)

MODE CONTINUOUS >

3

Set the rising slope, press

[Enter] to confirm

UP=1A/US

4

Set the descending confirm

DOWN=2A/US

5

Set level A,press [Enter] to confirm

Level A=5.000A

6

Set level B,press [Enter] to confirm

Level B=10.000A

7

Set the time width,press

[Enter] to confirm

WIDTH=5S(0.00005-3600S)

8

Open the transient test function, mentain on the

on”selection , press

[Enter] to confirm

TRAN ON OFF

9

Then the VFD will display

10.0000V 0.0000A Trig

10

Turn on the load, press

trigger

11

Press anyone of [CC/CV/CW/CR] button will quit the

4.5.2 Pulse Transient Operation

Press [Shift]+[2] (Tran) enter the transient operation setup menu:

[Shift]+[2]

move [ ] select ON., press [Enter]

Press [ ] as PULSE(the indicator

slope,press [Enter] to

“

TRAN and Trig

0.00W TRAN. 0

[Shift]+[ ] (Trigger) to

transient test,if you want to continue the test again,please repeat 1-10 steps.

4.5.3 T oggle T ransient Operation

Basic Operation

Steps

Operation

VFD Display

1

Press [Shift]+[2] (Tran), move

[Enter]

TRAN On Off

2

Set transient operation mode as

indicator lamp

Trig will be lighted)

MODE

3

Set the rising slope, press

[Enter] to confirm.

UP=1A/US

4

Set the descending slope,press

[Enter] to confirm

DOWN=2A/US

5

Set level A, press [Enter] to confirm

LEVEL A=5A

6

Set level B, press [Enter] to confirm

LEVEL B=10A

7

Open the transient test function, confirm

TRAN ON OFF

8

Then the VFD will display

10.0000V 0.0000A Trig

9

Turn on the load, press

10

Press anyone of [CC/CV/CW/CR] button will quit the

10A

5A

TRG

Toggled Transient Operation

Press [Shift]+[2] (Tran) to enter the transient operation setup menu

[ ] key to select on.,

press

to confirm.

TOGGLE(the

CONTINUOUS >

function,press [Enter] to

TRAN and Trig

0.00W TRAN. 0

[Shift]+[ ] (Trigger) to trigger transient test,if you want to continue the test again,please

repeat 1-9 steps.

4.6 List Operation

Before run a list file,you should edit the list file firstly and save it in a non-volatile memory.The following examples will help you understand the function well.In the example, the output voltage and current are 10V and 3A,and the DC load is

in CC mode.

Basic Operation

Steps

Operation

VFD Display

1

Press [Shift]+[3] (List), make sure

is flashing,if not,press

[Enter] to confirm.

LIST ON

2

Set the current range.

LIST RANGE=3A

3

Set list step count by number confirm.

LIST STEP=2(2-84)

4

Set the first step’s current, press

[Enter] to confirm.

STEP 01 =1A

5

Set the first step’s rise slope, press [Enter]to confirm.

STEP 01 =0.1A/US

6

Set the first step’s time, such as 5S. Press Enter to confirm.

STEP 01 =5S

7

Set the second step’s current, confirm.

STEP 01 =2A

8

Set the second step’s rise slope, confirm.

STEP 01 =0.1A/US

9

Set the second step’s time, such as 5S. Press [Enter] to confirm.

STEP 01 =5S

10

Set repeat times, press [Enter] to confirm.

REAPEAT =3

11

Select the position to save file, confirm.

SAVE LIST =1(1-7)

12

Press [ ] to select ON,

[Esc].

LIST ON CALL

13

Turn on the DC load, press

14

Press any function ksys if you want to quit list mode

Steps

Operation

VFD Display

Trigger

10 2 3 4 5

List count=1 List count=2

List sequence

the ON

[Enter] to select ON,then press [ ] key to select EDIT,press

keys, and press [Enter] to

such as 1A, press [Enter] to

such as 1A/uS press [Enter] to

CALL EDIT

such as 1, press [Enter] to

press [Enter] to confirm (the Trig indicator will be light now),press

[Shift]+[ ] (Trigger) to trigger.

If you want to run a list file you’ve saved, please recall it first.The steps is:

EDIT

Basic Operation

1

Press [Shift]+[3] (List),

is f lashing,if not,press

[Enter] to confirm.

LIST ON CALL

2

[Enter]

confirm.

RECALL LIST =1

3

-

LIST ON CALL EDIT

Steps

Operation

VFD Display

1

Press

(Prog),

ACTIVE =0987654321

2

Press [1] ,[2] and [3], Press

[Enter] to confirm.

ACTIVE =0987654YYY

3

Select the step that needs to

can continue the test.

PAUSE

4

Step 3 short circuit testing, to confirm.

SHORT

5

Set Ton for the first step, if you

Ton range 0~60S

SEQ01 ON =2S

Set Toff for the first step, if you

Toff range 0~60S

SEQ01 OFF =2S

7

Set testing delay time, range 0~60S e.g. 1S, press [1].

SEQ01 P/F =1S

make sure

the ON

EDIT

[Enter] to select ON,then press

[ ] to select CALL,press

4.7 Test Files

Test files are a generalization of lists—they let you generate a sequence of tests using different modes, mode parameters, and durations. They are useful for executing a set of tests on a device, then displaying whether the tests passed or failed. We will illustrate how to use test files by a short example.

You can edit up to 10 groups of testing files, each file has 10 steps, it can edit up to 100 steps which can be saved in EEPROM (address).

Suppose we have a small AC to DC power supply (a "wall-wart") and we want to set up an acceptance test for a number of these devices. Our test will consist of two steps:

1. Set the DC load to constant current mode to draw the rated current of 1.2A

from the device. The output voltage of the device at the rated current must be between 4.4V and 4.6V.

2. Set the DC load to constant voltage 3V. The output current of the device is

between 2A and 3A.

Select the list file.Press

to

3. When the device operates into a short, the supplied current must be larger

than 3.0 A.

[Shift]+[6]

pause during the test.

=NNNNNNN32Y

When it is paused,press [ ]

press [3]. And press [Enter]

=NNNNNNNY21

want to load on 2S, press [2], and then press [Enter] to confirm.

6

want to load off 2S, press [2], then press [Enter] to confirm

Basic Operation

Steps

Operation

VFD Display

8

Set Ton for the second step, if you want to load 2S, press

confirm

SEQ02 ON =2S

9

Set Toff of the second step, if then press [Enter] to confirm.

SEQ02 OFF =2S

10

Set testing delay time of the second step, e.g. 1S, press

[1]

SEQ02 P/F =1S

11

Set Ton for the third step, if

confirm

SEQ03 ON =3S

12

Set To ff of the third step, if you

[Enter] to confirm.

SEQ03 OFF =2S

13

Set testing delay time of the third step, e.g. 2S, press [2].

SEQ03 P/F =2S

14

set start voltage.Please refer

function of auto start

voltage”.

AUTO START=0.000V

15

Set stop condition

STOP COMP FA ILURE

[2], then press [Enter] to

you need 2S, press [2], and

you want to load on 3S, press [3], then press [Enter]to

need 2S, press [2], then press

to “

Function of Auto Start Voltage:

1. Auto start=0V.

Auto test file start to run when receive a trigger signal by pressing [shift]+[trigge]r or providing a external trigger signal.

2. Auto start is not equal to 0V(Take 2V as an example)

In this condition,user only need to connect the charger to input termianls of E-load.The unit can auto start to run test file when detect a rising edge from 0-2V.Auto start voltage is not suggested to be a big value.2V is suitable.

Ton, Toff and Tpf (P/F) Relation:

Basic Operation

15

Set stop conditions: COMP means

[Enter] key to confirm.

STOP COMP

16

Select the test file to link if you’d like to. The linked file must be saved

key to

confirm.

CHAIN PROGRAM

PROGRAM 1 Sequence

1 2 3 4 5 6 7 8 9

10

Save Group

1 2 3 4 5 6 7 8 9

10

PROGRAM 2 Sequence

1 2 3 4 5 6 7 8 9

10

Save Group

11

12

13

14

15

16

17

18

19

20

PROGRAM 10 Sequence

1 2 3 4 5 6 7 8 9

10

Save Group

91

92

93

94

95

96

97

98

99

100

17

Save the edited files in EEPROM,

[Enter]

SAVE PROGRAM

18

Select a operation mode and then

to set related

parameters

10.0000V 0.0000 A

19

Edit the three steps of the test file,

You need to recall the test file before runing it

Step

Operation

VFD Display

1

Press [CC] button,and then

to enter

the setting interface

RANGE=30.000A

2

Set the current range,press

[Enter]

RANGE =1.2A

3

set the upper limit of voltage,

[Enter]

HIGH=4.6V

4

Set the lower limit of voltage,

[Enter]

LOW=4.4V

5

Set the rise speed of current, press [Enter] to confirm

UP=1A/uS

6

Set the fall speed of current, press [Enter] to confirm

DOWN=1A/uS CC

7

Finish the setup

10.0000V 0.000 A

0.00W CC=0.000A

Tpf is the delay time for a step

stop test when all the steps are completed, FAILURE means stop test when the testing fails. Press

FAILURE

=0(0-10)

before. 0 stands for not linking to other files. Press [Enter]

you can save up to 10 groups of files, e.g please press [1] to save the edited file in group 1, and then press

to confirm.

=1(1-10)

press [Shift]+[CV]

details refer to below procedure. After all the steps are set , Press [ESC] to exit setup, and then press

[Shift]+[4] to save.

Set the steps of a test file in the example CC Mode, 1.2A, Voltage Range 4.4V~4.6V

[Shift)+[CV] (Setup)

to confirm

press

to confirm

0.00W CC=1.000A

CC

Basic Operation

Steps

Operation

VFD Display

1

Press [CV] button,press

to set related

parameters

RANGE=120.00V

2

Set the voltage range,press

[Enter]

RANGE=3.00V

3

set the upper limit of current,press [Enter] to confirm

HIGH=3A

4

Set the lower limit of current,press [Enter] to confirm

LOW=2A

5

Finish the setup

10.0000V 0.000 A

0.00W CV=10V

Steps

Operation

VFD Display

1

Press [CW] button,press

to set re lated

parameters

RANGE=150.00W

2

Set the power range,press

[Enter]

RANGE =1.00W

3

Set the upper limit of

[Enter]

HIGH=120.00V

4

Set the lower limit of

[Enter]

LOW=0.000V

5

Finish the setup

10.0000V 0.000 A

0.00W CW=1.00W

Steps

Operation

VFD Display

1

Press [CR] button,press

to set

related parameters

RANGE=7500.0Ω

2

Set the resistance range,press

[Enter]

RANG E = 2 Ω

3

set the upper limit of

[Enter]

HIGH=120.0V

4

Set the lower limit of

[Enter]

LOW=0.000V

5

Finish the setup

10.0000V 0.000 A

0.00W CR=2.000Ω

Operation

Display on Front Pannel

1.Press [Shift]

(system) enter

0.0000V 0.000A

2.Press right key,select RUNMODE and confirm with [Enter] button

0.0000V 0.000A

CV Mode, 3V, Current Range 2A~3A

[Shift]+[CV]

to confirm

The CW and CR is set as the same way:  CW Mode

[Shift]+[CV]

voltage,press

 CR Mode

[Shift]+[CV](Setup)

voltage,press

to confirm

 Go into Autotest Mode

into sysmtem menu

+[8]

POWER-ON BUZZER

RUN <NORMAL

Basic Operation

3.Press direction key to select confirm.

0.0000V 0.000A 4,Press [Esc] button to quit menu

0.0000V 0.000A

OCP_TEST,Press [Enter] to

set

According to the following steps to escape OPP mode: Press [Shift]+[8] (system)---”RUNMODE”---[Eneter]----select “NORMAL”

mode---[Enter].

(6)Start Auto Test File

Press [ ](trigger) to provide a signal to start auto test file.The discharing process will be auto terminated when stop conditions are reached.

(7)Recall Test File

Press [Shift]+[Enter] button to select programe file,the panel displays “RECALL PROGRAM= 1.Enter the file name(1-10),press [Enter] button to confirm.

If you need a pause, please press [Shift]+[0] (pause).Press [ ] can continue the test.

RUN <PROG_TEST

P01

Communication Interfaces

Chapter5 Communication Interfaces

DB9 in the rear panel of the DC load could connect with RS-232 through on TTL connector. The following description may help you to know how to control the output of the DC load through PC.

WA RNING: Don’t connect the DC load’s DB9 connector to a standard RS232 instrument; doing so may damage the instrument.

5.1Communication Modules Intruduction

IT-E121 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage level; you can use the communication module IT-E121 and an a standard RS232 extension cable to connect the DB9 interface connector of the DC load and the RS-232 interface connector of computer for the communication.

IT-E121A Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage level; you can use the communication module IT-E121A and an a standard RS232 extension cable to connect the DB9 interface connector of the DC load and the RS-232 interface connector of computer for the communication.

IT-E121A is derived on the basis of IT-E121,the main difference between them is that the DB9 interface connector of the RS232 changes from female to male ,so that can be directly connected to the standard LAN interface.

IT-E121A communication cable

IT-E122 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage level;

Communication Interfaces

IT-E122 has a USB interface on one end,you can use IT-E122 and an a standard USB extension cable to connect the DB9 interface connector of the DC load and the USB interface connector of computer for the communication.

IT-E123 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage level;

The interface on both side port of IT-E123 are DB9 interface and RS485 interface, you

can use the communication module IT-E123 and an a standard RS485-RS232 conversion cable to connect the DB9 interface connector of the DC load and the RS-232 interface connector of computer for the communication.

RS485 pins

5.2 Communication with PC

Before using the remote operation mode, please make sure that the baud rate and communication address in the DC load 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.

Communication Interfaces

Base Pin

Description

1

No conjunction

2

TXD, data transmission

3

RXD, data receiving

4

No conjunction

5

GND, grounding

6

No conjunction

7

CTS, clear to send

8

RTS, request to send

9

No conjunction

DB9 Serial Port

In order for the computer to communicate with the DC load, both must be set to the same RS-232 settings. These communication settings are:

1. Address: the range is from 0 to 31, default setting is 0

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

9600. Refer to chaptor 1.7.

3. Data bit: 8 bit

4. Stop bit: 1

5. Parity: None,Even, Odd, default is None, refer to chaptor1.7.

Parity=None Start Bit 8 Data Bits Stop Bit

RS-232

IT8514B+/IT8514C+/IT8516C+ series electronic load have a DB9 interface on rear panel. Connect E-load and computer by cable of COM ends (DB9). Composite key [Shift]+[8] on front board can be used to enter system menu for activation.

 RS-232 Interface In RS-232 interface, all SCPI commands can be used for programming. If

RS-232 interface is selected, in accordance with internal connection of data terminal equipment (DTE) and data communication equipment (DCE) as defined in EIA RS-232, the load is connected to another DTE (e.g., PC COM interface) with direct-connected Modem cable.

Number

RS232 Pins of Plug

 Communication Setup Please ensure the PC and the load have the same configuration in the following

items. Baudrate: 9600(4800、9600、19200、38400).You could enter the system menu

Communication Interfaces

to set the baudrate. Data bit: 8 Stop bit: 1 Parity bit: (none,even,odd)

EVEN 8 data bits have even parity ODD 8 data bits have odd parity NONE 8 data bits have no parity

Native machine address: ( 0 ~31, factory default is 0)

Start Bit 8 Data Bits Parity=None Stop Bit

5.3USB Interface

Connect the load and the computer using a cable with two USB interfaces (each end). All functions of the load can be programmed via USB.

After connecting the load and computer by USB, you need to install IT-E122 driver or IT-E132 driver ( see in ITECH CD or contact ITECH agent). The device manager of PC will display ‘Prolific USB-to-Serial COM Port’ after installing.

Notes: Only IT8514B+/8514C+/IT8516C+ m odels have the USB commucation interface. Just use USB line to connect in commucation. ( Please don’t connect DB9 interface at the same time). Don’t need to set the menu.

Specifications

input voltage

0~120V

input power

150W

300W

Minimum

value

±(0.05%+0.025%F

S)

0~30A

1mA

resolution

accuracy

0.01%+0.0008S

range

resolution

accuracy

Dynamic mode

accuracy

minimum rise time *5

Measuring range

Protection range

OPP

Protection

OCP

Protection

OVP

Protection

OTP

Protection

Chapter6 Specifications

Specifications

Model IT8511+ IT8512+

Rated

input current

0~3A 0~30A 0~3A 0~30A

value

( 0~40 ℃)

CV mode

CC mode

operation

range

resolution

accuracy

range

resolution

0.14V at 3A 1.4V at 30A 0.12V at 3A 1.2V at 30A

0.1~18V 0.1~120V 0.1~18V 0.1~120V 1mV 10mV 1mV 10mV

±(0.05%+0.02%FS) ±(0.05%+0.025%FS) ±(0.05%+0.02%FS)

0~3A 0~30A 0~3A

0.1mA 1mA 0.1mA

accuracy

CR mode

*1

CP mode

*3

range

0.05Ω~10Ω 10Ω~7.5KΩ 0.05Ω~10Ω 10Ω~7.5KΩ 16bit 16bit

0.01%+0.08S *2

±(0.1%+0.1%FS) ±(0.1%+0.1%FS)

0.01%+0.0008S

150W 300W

10mW 10mW

CC

T1＆T2

Rising/Falling slope *4

0.0001~0.2A/uS 0.001~1.5A/uS 0.0001~0.2A/uS 0.001~1.5A/uS

20uS~3600S /Res:1 uS 20uS~3600S /Res:1 uS

2uS±100ppm 2uS±100ppm

≒10uS ≒10uS ≒10uS ≒10uS

±(0.05%+0.05%FS)

0.01%+0.08S *2

Readback

voltage

Readback

current

Readback power

Short

range

resolution

accuracy

range

resolution

accuracy

range

resolution

accuracy

current(CC) voltage(CV)

≒3.3A

0~18V 0~120V 0~18V 0~120V

0.1 mV 1 mV 0.1 mV 1 mV ±(0.025%+0.025%FS)

0~3A 0~30A 0~3A 0~30A

0.1mA 1mA 0.1mA 1mA ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

150W 300W

10mW 10mW

±(0.1%+0.1%FS) ±(0.1%+0.1%FS)

≒160W

≒33A ≒3.3A ≒33A

≒125V

≒320W

≒125V

≒85℃ ≒85℃

Specification

≒3.3/3A ≒33/30A ≒3.3/3A ≒33/30A

0V 0V 0V 0V

Specifications

resistance(C

R)

input

e

Model

IT8511A+

IT8512A+

℃

input voltage

0~150V

input current

0~3A

0~30A

0~3A

0~30A

input power

150W

300W

Minimum

operation value

±(0.05%+0.025%F

S)

range

0~3A

0~30A

0~3A

0~30A

±(0.05%+0.05%

FS)

range

0.05Ω~10Ω

10Ω~7.5KΩ

0.05Ω~10Ω

10Ω~7.5KΩ

resolution

16bit

accuracy

0.01%+0.08S *2

0.01%+0.0008S

0.01%+0.08S *2

0.01%+0.0008S

range

150W

300W

resolution

10mW

accuracy

±( 0.1%+0.1%FS )

20uS~3600S /Res:1 uS

2uS±100ppm

±(0.025%+0.025%

OPP

on

OCP

on

OVP

on

OTP

on

≒45mΩ ≒45mΩ ≒40mΩ ≒40mΩ

Impendanc

Dimension

214.5mm*88.2mm*354.6mm 214.5mm*88.2mm*354.6mm

150KΩ 150KΩ

Rated

value

( 0~40

)

0.25V at 3A 2.5V at 30A 0.14V at 3A 1.4V at 30A

range 0.1~18V 0.1~150V 0.1~18V 0.1~150V

CV

resolution 1mV 10mV 1mV 10mV

mode

±(0.05%+0.02%FS) ±(0.05%+0.025%FS) ±(0.05%+0.02%FS)

CC

accuracy

resolution 0.1mA 1mA 0.1mA 1mA

mode

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

CR

mode

*1

CP

mode

*3

Dynamic mode( CC mode )

T1＆T2

20uS~3600S /Res:1 uS

accuracy 2uS±100ppm

Rising/Falling slope *4 0.0001~0.2A/uS 0.001~1.5A/uS 0.0001~0.2A/uS 0.001~1.5A/uS

minimum rise time *5 ≒10uS ≒10uS ≒10uS ≒10uS

Measuring range

Readba

ck

voltage

Readba

ck

current

range 0~18V 0~150V 0~18V 0~150V

resolution 0.1 mV 1 mV 0.1 mV 1 mV

accuracy

±(0.025%+0.025%FS) ±(0.025%+0.025%FS) ±(0.025%+0.025%FS)

FS)

range 0~3A 0~30A 0~3A 0~30A

resolution 0.1mA 1mA 0.1mA 1mA

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

range 150W 300W

Readbac

k power

resolution 10mW 10mW

accuracy ±(0.1%+0.1%FS) ±(0.1%+0.1%FS)

Protection range

≒320W

Protecti

≒160W

Protecti

≒3.3A ≒33A ≒3.3A ≒33A

≒160V ≒160V

≒85℃ ≒85℃

Specifications

resistance( CR

)

input

ance

Dimensi

on

input voltage

0~500V

input current

0~3A

0~10A

input power

150W

Minimum

value

range

0.5Ω~10Ω

10Ω~7.5KΩ

resolution

16bit

accuracy

0.01%+0.08S *2

0.01%+0.0008S

range

150W

resolution

10mW

accuracy

0.1%+0.2%FS

CC mode

T1＆T2

Rising/Falling

slope*4

minimum rise

*5

Protection range

≒

Specification

≒3.3/3A ≒33/30A ≒3.3/3A ≒33/30A

≒80mΩ ≒80mΩ ≒40mΩ ≒40mΩ

Short

current( CC )

voltage( CV ) 0V 0V 0V 0V

Impend

Rated value

( 0~40 ℃)

CV mode

CC mode

CR mode*1

CP mode

*3

150KΩ 150KΩ

214.5mm*88.2mm*354.6mm 214.5mm*88.2mm*354.6mm

Model IT8511B+

operation

range 0.1~50V 0.1~500V

resolution 1mV 10mV

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

range 0~3A 0~10A

resolution 0.1mA 1mA

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

1.2V at 3A 4V at 10A

Dynamic mode

20uS~3600S /Res:1 uS

Dynamic mode

accuracy 2uS±100ppm

0.0001~0.2A/uS 0.001~0.8A/uS

time

≒10uS ≒10uS

Measuring range

Readback

voltage

Readback

current

Readback power

OPP Protection OCP Protection OVP Protection OTP Protection

range 0~50V 0~500V

resolution 1 mV 10 mV

accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS)

range 0~3A 0~10A

resolution 0.1mA 1mA

accuracy ±(0.05%+0.05%FS)

range 150W

resolution 10mW

accuracy ±(0.1%+0.2%FS)

160W

≒3.3A ≒11A

530V

85℃

Specifications

resistance( C

R )

input

Impendance

input voltage

0~500V

0~120V

input power

300 W

Minimum

value

resolution

1mV

10mV

1mV

10mV

±(0.05%+0.025%F

S)

range

0.3Ω~10Ω

10Ω~7.5KΩ

0.3Ω~10Ω

10Ω~7.5KΩ

resolution

16bit

range

300W

resolution

10mW

accuracy ±(0.1%+0.1%FS)

0.1%+0.1%FS)

CC mode

OPP

Protection

OCP

Protection

OVP

Protection

Specification

Short

Dimension

Model IT8512B+ IT8512C+

Rated value

( 0~40 ℃)

CV mode

CC mode

current( CC )

voltage( CV ) 0V 0V

input current 0~3A 0~15A 0~6A 0~60A

operation

range 0.1~50V 0.1~500V 0.1~18V 0.1~120V

accuracy

range 0~3A 0~15A 0~6A 0~60A

resolution 0.1mA 1mA 0.1mA 1mA

accuracy ±(0.05%+0.05%FS)

0.6V at 3A 3V at 15A 0.25V at 6A 2.5V at 60A

±(0.05%+0.02%FS) ±(0.05%+0.025%FS) ±(0.05%+0.02%FS)

≒3.3/3A ≒11/10A

≒400mΩ ≒400mΩ

1MΩ

214.5mm*88.2mm*354.6mm

CR mode

*1

accuracy 0.01%+0.08S *2 0.01%+0.0008S 0.01%+0.08S *2 0.01%+0.0008S

CP mode

*3

±(

Dynamic mode

T1＆T2 20uS~3600S /Res:1 uS 20uS~3600S /Res:1 uS

accuracy

Rising/Falling slope *4

minimum rise time *5 ≒10uS ≒10uS ≒10uS ≒10uS

0.0001~0.2A/uS 0.001~0.8A/uS 0.0001~0.3A/uS 0.001~3A/uS

2uS±100ppm 2uS±100ppm

Measuring range

Readback

voltage

Readback

current

Readback power

range 0~50V 0~500V 0~18V 0~120V

resolution 1 mV 10mV 1 mV 10mV

accuracy ±(0.025%+0.025%FS)

range 0~3A 0~15A 0~6A 0~60A

resolution 0.1mA 1mA 0.1mA 1mA

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

range 300W 300W

resolution 10mW 10mW

accuracy ±(0.1%+0.1%FS) ±(0.1%+0.1%FS)

Protection range

≒320W

≒3.3A ≒16A ≒6.5A ≒65A

≒530V ≒125V

Specifications

OTP

Protection

resistance( C

R )

input

e

input voltage

0~800V

input current

0~1A

0~5A

input power

300W

Minimum

value

accuracy

±(0.05%+0.05%FS)

range

2Ω~10Ω

10Ω~7.5KΩ

resolution

16bit

accuracy

0.01%+0.08S *2

0.01%+0.0008S

range

300W

resolution

10mW

accuracy

0.2%+0.2%FS

minimum rise

*5

Protection range

≒85℃ ≒85℃

Specification

current( CC ) ≒3.3/3A ≒16/15A ≒6.5/6A ≒65/60A

Short

voltage( CV ) 0V 0V 0V 0V

≒180mΩ ≒180mΩ ≒40mΩ ≒40mΩ

Impendanc

1MΩ 150KΩ

Dimension 214.5mm*88.2mm*354.6mm 214.5mm*88.2mm*354.6mm

Model IT8512H+

Rated value

( 0~40 ℃)

CV mode

CC mode

CR mode*1

operation

range 0.1~80V 0.1~800V

resolution 1mV 10mV

range 0~1A 0~5A

resolution 0.1mA 1mA

accuracy ±(0.05%+0.1%FS) ±(0.05%+0.05%FS)

1.4V at 1A 7V at 5A

CP mode

*3

Dynamic mode

Readback

voltage

Readback

current

Readback power

Dynamic mode

CC mode

T1＆T2

accuracy 2uS±100ppm

Rising/Falling

slope*4

time

0.0001~0.04A/uS 0.001~0.2A/uS

≒20uS ≒20uS

20uS~3600S /Res:1 uS

Measuring range

range 0~80V 0~800V

resolution 1 mV 10 mV

accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS)

range 0~1A 0~5A

resolution 0.1mA 1mA

accuracy ±(0.05%+0.05%FS)

range 300W

resolution 10mW

accuracy ±(0.2%+0.2%FS)

OPP Protection ≒320W OCP Protection

≒1.1A ≒5.5A

Specifications

Specification

resistance( C

R )

input

Impendance

input voltage

0~150V

input current

0~6A

0~60A

input power

400W

Minimum

value

range

0.1Ω~10Ω

10Ω~7.5KΩ

accuracy

0.01%+0.08S *2

0.01%+0.0008S

range

400W

resolution

10mW

accuracy

±(0.2%+0.2%FS)

Rising/Falling

slope*4

minimum rise

*5

Protection range

≒

OVP Protection ≒850V OTP Protection ≒85℃

Short

Dimension

Rated value

( 0~40 ℃)

CV mode

CC mode

current( CC )

voltage( CV ) 0V 0V

≒1.1/1A ≒5.5/5A

≒1.4Ω

2MΩ

214.5mm*88.2mm*354.6mm

Model IT8513A+

operation

range 0.1~18V 0.1~150V

resolution 1mV 10mV

accuracy ±(0.05%+0.02%FS) ±(0.05%+0.025%FS)

range 0~6A 0~60A

resolution 0.1mA 1mA

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

0.25V at 6A 2.5V at 60A

CR mode*1

CP mode

*3

Dynamic

mode

Readback

voltage

Readback

current

Readback power

resolution 16bit

Dynamic mode

CC mode

T1＆T2 20uS~3600S /Res:1 uS

accuracy

time

0.001~0.15A/uS 0.01~1 A/uS

≒50uS ≒60uS

2Us＋100ppm

Measuring range

range 0~18V 0~150V

resolution 0.1 mV 1mV

accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS)

range 0~6A 0~60A

resolution 0.1mA 1mA

accuracy ±(0.05%+0.05%FS)

range 400W

resolution 10mW

accuracy ±(0.2%+0.2%FS)

OPP

420W

Specifications

Protection

OCP

Protection

OVP

Protection

OTP

Protection

Specification

resistance( C

R )

input

e

Model

IT8513C+

IT8514C+

input voltage

0~120V

input current

0~12A

0~120A

0~24A

0~240A

input power

600 W

1500W

Minimum

value

±(0.05%+0.025%F

range

0~12A

0~120A

0~24A

0~240A

resolution

16bit

accuracy

0.01%+0.08S *2

0.01%+0.0008S

0.02%+0.08S *2

0.02%+0.0008S

range

600W

1500W

resolution

10mW

accuracy ±(0.2%+0.2%FS)

±(0.2%+0.2%FS)

Dynamic mode

Rising/Falling slope *4

Measuring range

range

0~18V

0~120V

0~18V

0~120V

resolution

0.1 mV

1mV

0.1 mV

1mV

≒6.6A ≒66A

≒165V

≒85℃

current( CC ) ≒6.6/6A ≒66/60A

Short

Impendanc

Dimension

Rated value

( 0~40 ℃)

CV mode

CC mode

CR mode

*1

voltage( CV )

≒280KΩ

214.5mm*88.2mm*453.5mm

operation

range 0.1~18V 0.1~120V 0.1~18V 0.1~120V

resolution 1mV 10mV 1mV 10mV

accuracy

resolution 1mA 10mA 1mA 10mA

accuracy

range 0.05Ω~10Ω 10Ω~7.5KΩ 0.05Ω~10Ω 10Ω~7.5KΩ

0.2V at 12A 2V at 120A 0.25V at 24A 2.5V at 240A

±(0.05%+0.02%FS) ±(0.05%+0.025%FS) ±(0.05%+0.02%FS)

±(0.05%+0.05%FS) ±(0.1%+0.1%FS)

≒0V

≒30mΩ

S)

CP mode

*3

minimum rise time *5 ≒60uS ≒60uS ≒60uS ≒60uS

Readback

voltage

Readback

current

Readback

power

T1＆T2

accuracy

accuracy ±(0.025%+0.025%FS)

resolution 1mA 10mA 1mA 10mA

accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS)

resolution 10mW 10mW

CC mode

100uS~3600S /Res:1 uS 100uS~3600S /Res:1 uS

10uS±100ppm 10uS±100ppm

0.001~0.2A/uS 0.01~1.6A/uS 0.001~0.3A/uS 0.01~3.2A/uS

range 0~12A 0~120A 0~24A 0~240A

range 600W 1500W

Specifications

Protection range

OPP

Protection

OCP

Protection

OVP

Protection

OTP

Protection

Specification

voltage( CV )

0V

resistance( C

R )

input

e

Model

IT8514B+

IT8516C+

input voltage

0~500V

0~120V

input current

0~6A

0~60A

0~24A

0~240A

input power

1500 W

3000W

Minimum

value

±(0.05%+0.025%F

range

0~6A

0~60A

0~24A

0~240A

range

0.05Ω~10Ω

10Ω~7.5KΩ

0.05Ω~10Ω

10Ω~7.5KΩ

resolution

16bit

accuracy

0.02%+0.08S *2

0.02%+0.0008S

0.02%+0.08S *2

0.02%+0.0008S

range

1500W

3000W

resolution

10mW

accuracy

±( 0.2%+0.2%FS )

Dynamic mode

Rising/Falling slope *4

Measuring range

range

0~50V

0~500V

0~18V

0~120V

resolution

0.1 mV

1mV

0.1 mV

1mV

accuracy ±(0.2%+0.2%FS) ±(0.2%+0.2%FS)

≒620W

≒13A ≒130A ≒26.7A ≒267A

≒125V ≒125V

≒95℃ ≒85℃

current( CC ) ≒13/12A ≒130/120A ≒26.7/24A ≒267/240A

≒1550W

Short

≒15mΩ ≒15mΩ ≒8mΩ ≒8mΩ

Impendanc

150KΩ 150KΩ

Dimension 214.5mm*88.2mm*453.5mm 436.5mm*88.2mm*463.5mm

Rated value

( 0~40 ℃)

operation

0.25V at 6A 2.5V at 60A 0.15V at 24A 1.5V at 240A

CV mode

CC mode

CR mode

*1

CP mode

*3

minimum rise time *5 ≒60uS ≒60uS ≒70uS ≒70uS

Readback

voltage

Readback

current

Readback

power

resolution 1mV 10mV 1mV 10mV

accuracy

resolution 1mA 10mA 1mA 10mA

accuracy

T1＆T2

accuracy

accuracy ±(0.025%+0.025%FS)

resolution 1mA 10mA 1mA 10mA

accuracy ±(0.05%+0.05%FS) ±(0.1%+0.1%FS)

resolution 10mW 10mW

accuracy ±(0.2%+0.2%FS) ±(0.2%+0.2%FS)

range 0.1~50V 0.1~500V 0.1~18V 0.1~120V

±(0.05%+0.02%FS) ±(0.05%+0.025%FS) ±(0.05%+0.02%FS)

±(0.05%+0.05%FS)

CC mode

100uS~3600S /Res:1 uS 120uS~3600S /Res:1 uS

10uS±100ppm 10uS±100ppm

0.001~0.15A/uS 0.01~0.8A/uS 0.001~0.3A/uS 0.01~2.8A/uS

range 0~6A 0~60A 0~24A 0~240A

range 1500W 3000W

±(0.1%+0.1%FS)

S)

Specifications

Protection range

OPP

Protection

OCP

Protection

OVP

Protection

OTP

Protection

Specification

voltage( CV )

0V

resistance( C

R )

input

e

≒3050W

current( CC )

≒1550W

≒6.7A ≒67A ≒26A ≒260A

≒530V ≒125V

≒85℃ ≒85℃

≒6.7/6A ≒67/60A ≒26/24A ≒260/240A

Short

≒30mΩ ≒30mΩ ≒5mΩ ≒5mΩ

Impendanc

Dimension

436.5mm*88.2mm*463.5mm 436.5mm*176mm*463.5mm

150KΩ 150KΩ

*1 The voltage/current input is no less than 10% FS *2 The scope of read-back resistance is:( 1/(1/R+(1/R)*0.01%+0.08),1/(1/R-(1/R)*0.01%-0.08) )

IT8514B+/14C+/16C+: ( 1/(1/R+(1/R)*0.02%+0.08),1/(1/R-(1/R)*0.02%-0.08) )

The voltage/current input is no less than 10% FS

*3 *4 .Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current *5 Minimum rise time: 10%-90% current rise time

* The above specifications may be subject to change without prior notice.

Supplementary Characteristics

 Memory capacity:100 registeres

Suggested calibration frequency:Once a year

 AC input level(A transfer switch is selectable on the rear panel)

Option Opt.1: 220V ±10% 50Hz/60Hz Option Opt.2: 110V ±10% 50Hz/60Hz

 Cooling type

Intelligent fans

 Fans working principle:

Fans running speed is determined by radiator temperature.When temperature reaches 40℃,fans start to work and intelligently adjust its speed with temperature v ariation.

Appendix

Model

Specification

Cross Section

Length

IT-E301/10A

10A

-

1m

IT-E301/30A

30A

6mm2

1.2m

IT-E301/30A

30A

6mm2

2m

IT-E301/60A

60A

20mm2

1.5m

IT-E301/120A

120A

50mm2

2m

IT-E301/240A

240A

70mm2

1m

IT-E301/240A

240A

70mm2

2m

IT-E301/360A

360A

95mm2

2m

AWG

10

12

14

16

18

20

22

24

26

28

The

40

25

20

13

10 7 5

3.5

2.5

1.7

Appendix

Specifications of Red and Black Test Lines

ITECH provides you with optional red and black test lines, which individual sales and you can select for test. For specifications of ITECH test lines and maximum current values, refer to the table below.

For maximum current of AWG copper wire, refer to table blow.

Maximum Current Value( A)

Note: AWG ( American Wire Gage), it means X wire ( marked on the wire). The table above lists current capacity of single wire at working temperature of 30°C. For reference only.

Contact Us

Thanks for purchasing ITECH products. In case of any doubts, please contact us as follows:

1.

Refer to accompanying data disk and relevant manual. Visit ITECH website: www.itechate.com.

2.

3. Select the most convenient contact method for further information.

ITech IT8511+, IT8512C+, IT8512A+, IT8512B+, IT8511A+ User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Quality Certification and Assurance

Warranty

Limitation of Warranty

Safety Symbols

Safety Precautions

Environmental Conditions

Regulatory Markings

Waste Electrical and Electronic Equiment (WEEE) Directive

Compliance Information

Chapter1 Inspection and Installation

1.1 Verifying the Shipment

1.2 Instrument Size Introduction

1.3 Adjustment of Load Handle

1.4 Disassembly of Load Handle

1.5 Rack Mounting

1.6 Connecting the Power Cord

Chapter2 Quick Start

2.1 Brief Introduction

2.2 Front Pannel Introduction

2.3 VFD Display Annunciators

2.4 Front Panel Keys

2.5 Combination Keys

2.6 Rear Pannel Introduction

2.7 Power-on Selftest

Chapter3 Functions and Characteristics

3.1 Local Mode/Remote Mode

3.2 Operation Mode

3.2.1 Constant Current Mode (CC)

3.2.2 Constant V oltage Mode (CV)

3.2.3 Constant Resistance Mode (CR)

3.2.4 Constant Power Mode (CW)

3.3 Input On/Off Control

3.4 Short-circuit Analog Function

3.5 System Menu (System)

3.6 Config Menu (Config)

3.7 Trigger Function

3.8 Transient Function

3.8.1 Continuous Mode

3.8.2 Pulse Mode

3.8.3 Toggled Mode

3.9 LIST Operation

3.10 Saving and Recalling Settings

3.11 VON Function

3.12 OCP Operation

3.13 OPP Operation

3.14 Battery Test

3.15 CR-LED Test Function

3.16 Measurement of Voltage Rise Time

3.17 Protection Features

3.17.1 Over Voltage Protection (OVP)

3.17.2 Over Current Protection (OCP)

3.17.3 Over Power Protection (OPP)

3.17.4 Over T emperature Protection (OTP)

3.17.5 Reverse Voltage Protection (LRV)

3.18 Key Lock Function

3.19 The Terminals on the Rear Panel

3.19.1 Remote Sensing

3.19.2 External Triggering

3.19.3 Current Monitoring (I Monitor)

3.19.4Ripple Function

Chapter4 Basic Operation

4.1 Constant Current Operation

4.2 Constant Voltage Operation

4.3 Constant Power Operation

4.4 Constant Resistance Operation

4.5 Transient Test Operation

4.5.1 Continuous Transient Operation

4.5.2 Pulse Transient Operation

4.5.3 T oggle T ransient Operation

4.6 List Operation

4.7 Test Files

Chapter5 Communication Interfaces

5.1Communication Modules Intruduction

5.2 Communication with PC

5.3USB Interface

Chapter6 Specifications