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ITech IT8700 Series User Manual

Dc programmable electronic loads
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DC Programmable Electronic
Loads
IT8700
Series
User Manual
Model: IT8722/IT8723/IT8731/IT8732/IT8733/
IT8722B/IT8732B/IT8733B/
IT8722P/IT8723P/IT8731P/IT8732P/IT8733P/
IT8722BP/IT8732BP/IT8733BP/
IT8702/IT8703/IT8701P/IT8702P/IT8703P
Version: 4.4

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Summary of Contents for ITech IT8700 Series

  • Page 1 DC Programmable Electronic Loads IT8700 Series User Manual Model: IT8722/IT8723/IT8731/IT8732/IT8733/ IT8722B/IT8732B/IT8733B/ IT8722P/IT8723P/IT8731P/IT8732P/IT8733P/ IT8722BP/IT8732BP/IT8733BP/ IT8702/IT8703/IT8701P/IT8702P/IT8703P Version: 4.4...
  • Page 2 Notices Warranty Safety Notices © Itech Electronic, Co., Ltd. 2021 The materials contained in this No part of this manual may be document are provided “as is”, and reproduced in any form or by any means (including electronic storage and...

  • Page 3: Limitation Of Warranty

    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).

  • Page 4: Safety Precautions

    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.

  • Page 5: Environmental Conditions

    2002/96/EC Waste Electrical and Electronic Equipment (WEEE) Directive This product complies with the WEEE Directive (2002/96/EC) marking requirement. This affix product label indicates that you must not discard the electrical/electronic product in domestic household waste. Product Category Copyright © Itech Electronic Co., Ltd.
  • Page 6 With reference to the equipment classifications described in the Annex I of the WEEE Directive, this instrument is classified as a “Monitoring and Control Instrument”. To return this unwanted instrument, contact your nearest ITECH office. Copyright © Itech Electronic Co., Ltd.

  • Page 7: Compliance Information

    Connection of the instrument to a test object may produce radiations beyond the specified limit. 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 Copyright © Itech Electronic Co., Ltd.

  • Page 8: Table Of Contents

    4.3.5 Compound Operation Mode ........................40 4.3.6 Operations ..............................41 4.4 T ............................. 42 RANSIENT OPERATION 4.4.1 Continuous ............................... 43 4.4.2 Pulsed ............................... 43 4.4.3 Toggled ..............................43 4.4.4 A/B transient operations ......................... 44 Copyright © Itech Electronic Co., Ltd.
  • Page 9 ..............................77 INTERFACE 6.2 E .............................. 79 THER ET INTERFACE 6.3 GPIB IT8700(G) ) ......................79 INTERFACE NLY FOR SERIES 6.4 USB ..............................79 INTERFACE APPENDIX................................80 ........................80 PECIFICATIONS OF ED AND LACK INES Copyright © Itech Electronic Co., Ltd.

  • Page 10: Chapter1 Inspection And Installation

    When returning the instrument for warranty service or repair, the specified packing requirements shall be met. 1.2 Installation 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. Copyright © Itech Electronic Co., Ltd.
  • Page 11 Inspection and Installation IT8701P Mainframe size Detailed Dimension Drawing Copyright © Itech Electronic Co., Ltd.
  • Page 12 Inspection and Installation IT8702 Mainframe size Detailed Dimension Drawing Copyright © Itech Electronic Co., Ltd.
  • Page 13 Inspection and Installation IT8703 Mainframe size Detailed Dimension Drawing Copyright © Itech Electronic Co., Ltd.
  • Page 14 Inspection and Installation IT8702P Mainframe size Detailed Dimension Drawing Copyright © Itech Electronic Co., Ltd.
  • Page 15 Inspection and Installation IT8722/IT8723/IT8722B Module Detailed Dimension Drawing Copyright © Itech Electronic Co., Ltd.
  • Page 16 Inspection and Installation IT8731/IT8732/IT8733/IT8732B/IT8733B Module Detailed Dimension Drawing Copyright © Itech Electronic Co., Ltd.

  • Page 17: Module Installation

    IT8703/IT8703P extended frame can also contain four load modules. The installation steps of extended frame are the same as single mainframe, which just need screwdriver. Installation steps: Turn off the power switch and disconnect the 110V/220V power cord. Copyright © Itech Electronic Co., Ltd.

  • Page 18: Channel Number

    IT8701P/IT8702P mainframe and IT8703/IT8703P extended mainframe can be understood in the same way. Fig 1-2 channel number distribution For example： If IT8702 mainframe contains two single channel modules IT8731 Copyright © Itech Electronic Co., Ltd.

  • Page 19: Mainframe Installation

    Fig1-3 channel number order while installing 4 single-channel unit 1.4 Mainframe installation The operating temperature of IT8700 series electronic load is 0 to 40℃. A fan cools the electronic load by drawing air through the top and sides and exhausting it out by the rear side. The electronic load must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation.
  • Page 20 China United States & Europe England Canada IT-E171 IT-E173 IT-E174 IT-E172 Figure 1-5 types of power cord Connecting AC Input Connect standard power cord to the power supply input terminal. Copyright © Itech Electronic Co., Ltd.

  • Page 21: Connecting The Device Under Test

    Directly connect the other end of the red and black cables to the DUT. Note Only the IT8731P/IT8732P/IT8732BP/IT8733P/IT8733BP/IT8722P/IT8723P/IT8722BP modules support front panel terminal wiring. ⚫ Rear panel terminal wiring (Single channel modules) (Double channel modules) Copyright © Itech Electronic Co., Ltd.
  • Page 22 Re-tighten the screws. Connect the other end of the remote sense cables and the red and black cables to the DUT. Note Only the IT8731P/IT8732P/IT8732BP/IT8733P/IT8733BP/IT8722P/IT8723P/IT8722BP modules support front panel terminal wiring. ⚫ Rear panel terminal wiring Copyright © Itech Electronic Co., Ltd.
  • Page 23 For example, after being paralleled, two single channel modules (80V/40A/300W) can dissipate up to 80V/80A/600W. The following picture 1-7 illustrates the paralleled connection of two same models for increased power dissipation. Copyright © Itech Electronic Co., Ltd.
  • Page 24 Inspection and Installation Fig 1-7 module parallel connection Copyright © Itech Electronic Co., Ltd.

  • Page 25: Chapter2 Quick Start

    Help you make better use of this series of electronic load. 2.1 Brief Introduction IT8700 series programmable DC electronic load adopts removable modules design, with single frame control 8 channels, and 16 channels with extended mainframe extension transient mode up to 25 kHz , which improves your test efficiency, with high resolution and accuracy.

  • Page 26: Introduction

    ITECH for availability. 2.2 Introduction This user’s manual introduces the specifications, installation, operation and programming of IT8700 series DC electronic loads. There’re two parts in IT8700 DC electronic loads, mainframe/ extended frame and modules. The frames mentioned are IT8702/IT8701P/IT8702P mainframe and IT8703/IT8703P extended frame.

  • Page 27: Front Pannel Introduction

    There’re two parts in front panel, which are main panel and module panel. Refer to figure 2-1. Main panel and module panel keys’ function will be introduced below. Figure 2-1 IT8700 front panel (take example of IT8702P) Copyright © Itech Electronic Co., Ltd.

  • Page 28: Rear Panel Description

    2.5 Power-on Selftest A successful test process indicates that the instrument meets the factory specifications and can be operated well. Before operation, please confirm that you have fully understood the safety instructions. Copyright © Itech Electronic Co., Ltd.
  • Page 29 Check whether the fuse of electronic fuse is burned out. If yes, change fuse. Detailed steps: 1) Pull out power line and take out the fuse box at power line jack with a small screw driver. As shown below. Copyright © Itech Electronic Co., Ltd.
  • Page 30 IT8702 T5A 250V T2.5A 250V IT8702P T5A 250V T2.5A 250V IT8703 T5A 250V T2.5A 250V IT8703P T5A 250V T2.5A 250V 3) After replacement, install the fuse box back to original position, as shown below. Copyright © Itech Electronic Co., Ltd.

  • Page 31: Chapter3 Panel Function Introduction

    The operation of setting and editing parameters of each channel referred below are on the mainframe front panel. Function keys ： The following are the detailed description about the functions and specific operations achievable of all the keys. Description Copyright © Itech Electronic Co., Ltd.
  • Page 32 ▼ ▼ key is used to move up, select the menu; key is used to Shift Shift Enter Enter move down, select the menu; key is used to confirm; key is a comprehensive key. Copyright © Itech Electronic Co., Ltd.

  • Page 33: Menu List

    Panel function introduction 3.1.2 Menu list Different modules of IT8700 series electronic loads have different setting and configuration menu according to different working modes. Press key to enter menu setting, view the menu in VFD and use to scroll through the completely menu list as following. Press...
  • Page 34 HIGH RANGE In CV mode ，Edit low range of list LOW RANGE EXIT CR-LED Simulate the LED light to test LED power drive（in CR mode） Enable the function（in CR mode, press “setup” to set Copyright © Itech Electronic Co., Ltd.
  • Page 35 Recall List Recall list operation file Edit List Edit list operation file Exit CR-LED Simulate the LED light to test LED power drive（in CR mode） Enable the function（in CR mode, press “setup” to set Vd Copyright © Itech Electronic Co., Ltd.
  • Page 36 Setup the time of the trigger timer Communication Select the port to communicate with a computer RS232〈DEFAULT〉 USB TMC-USB488 GPIB ETHERNET RS232 SET Baudrate Set Setup the communication baud rate 4800 <Default> 9600 19200 Copyright © Itech Electronic Co., Ltd.

  • Page 37: Channel Option

    ⚫ Chan Chan +number key to switch channel. ▲ ▲ ▼ ▼ Chan Chan ⚫ Press key to switch. ⚫ When in SETUP menu, you can directly press the number keys to switch. Copyright © Itech Electronic Co., Ltd.

  • Page 38: Save And Recall

    Below are the detail introduction of module panel keys and functions. 3.2.1 Single channel module panel Fig 3-2 single channel module panel Module’s panel view ： high-brightness VFD display show module ‘s working mode. Module’s panel keyboard: Copyright © Itech Electronic Co., Ltd.

  • Page 39: Dual Channel Module Panel

    Fig 3-3 dual-channel module front panel Module’s panel view：highlight VFD which display the working state, upper display voltage and current information for channel L; lower displays information for channel R. Module’s panel keyboard： Button Description Copyright © Itech Electronic Co., Ltd.

  • Page 40: Vfd Indicator Function Description

    TRAN is lit up, when the module enables transient mode. LIST is lit up, when select the LIST mode at the configuration. SENSE is enabled in remote meter function. 3.4 8-pin control connector IT8700 electronic load 8-pin connector on rear panel（figure 3-5） ： Copyright © Itech Electronic Co., Ltd.

  • Page 41: External Trigger Connections

    When select bus trigger mode, first set the trigger source as BUS, connect the electronic load by GPIB or USB communication interface, then if get the *TRG command, the load will produce a trigger signal. Copyright © Itech Electronic Co., Ltd.

  • Page 42: External On/Off Control Connection

    This interface can be used to connect extended frame. IT8702 can take up to 16 channels with IT8703. IT8701P can take up to 12 channels with extended frame and IT8702P can take up to 16 channels with IT8703P. Copyright © Itech Electronic Co., Ltd.

  • Page 43: Controlling Link

    Voltage fault indication terminal Digital input terminal Digital output terminal Current monitoring output I Monitor Voltage remote measuring terminal(+) Sense + Voltage remote measuring terminal(-) Sense - Ext_PRG+ External analog controlling terminal(+) Ext_PRG- External analog controlling terminal(-) Copyright © Itech Electronic Co., Ltd.
  • Page 44 7 and pin 8. 0-10V adjustable analogue simulate the 0-fullscale to regulate the input voltage and current of the electronic load（10V indicate the full range of load voltage or current value） Copyright © Itech Electronic Co., Ltd.

  • Page 45: Chapter4 Operations Introduction

    4.2 PC control connection IT8700 series electronic load can achieve remote control via RS232 /USB /ETHERNET, but only one interface can be used at one time. choose the interface via the system key （SYSTEM） . Connect Communication cable before power on.

  • Page 46: Constant Current (Cc) Mode

    You can set current level’s rise/fall slew rate on the front panel or by remote operation. The slew rate programmed act in effect to the immediate, triggered and transient current level changes. Copyright © Itech Electronic Co., Ltd.

  • Page 47: Constant Resistance (Cr) Mode

    4.3.3 Constant voltage (CV) mode In this mode, the electronic load will attempt to sink enough current to control the source voltage to the programmed value. See figure 4-3. Copyright © Itech Electronic Co., Ltd.

  • Page 48: Constant Power (Cw) Mode

    4.3.4 Constant power (CW) mode In CW mode, electronic load will consume a constant power. As shown in fig4-4, when input voltage increase, the input current will decrease, while power will remain the same. P=(V*I). Copyright © Itech Electronic Co., Ltd.

  • Page 49: Compound Operation Mode

    When the CV is working, the maximum loading current is limited. ⚫ The CR+CC mode is commonly used in the testing of voltage limiting, current limiting characteristics, constant voltage accuracy, and constant Copyright © Itech Electronic Co., Ltd.

  • Page 50: Operations

    Enter Press key to enter range selection menu <Range>, press ▼ ▼ key to enter the mode selection menu <Mode>, press key to select, Enter such as <low range>, press key to confirm. CH01 Copyright © Itech Electronic Co., Ltd.

  • Page 51: Transient Operation

    The transient testing modes have 3 kinds: continuous, pulsed, or toggled. ⚫ Continuous: Generates a respective pulse stream the toggles between two load levels ⚫ Pulse: Generates a load change that returns to its original state after some Copyright © Itech Electronic Co., Ltd.

  • Page 52: Continuous

    In toggle mode, the electronic load will switch between A level and B level when receiving a triggering signal after the transient operation is enabled. The following picture shows the current waveform in toggle transient operation. Copyright © Itech Electronic Co., Ltd.

  • Page 53: A/B Transient Operations

    ▼ ▼ Press key to enter A LEVEL setting <TRANa>，such as 10.00A, Enter press key to confirm Transition Level = 10.00A ▼ ▼ Press key to enter A level width setting <Ta>，such as 0.003S， Copyright © Itech Electronic Co., Ltd.

  • Page 54: List Operation

    List mode lets you generate complex sequences of input changes with rapid, precise timing, which may be synchronized with internal or external signals. This is useful when running test sequences with a minimum amount of Copyright © Itech Electronic Co., Ltd.
  • Page 55 Press Shift Shift Press +5，press key to select <list>, press key to ▼ ▼ Enter confirm, press key to select List<Edit list>, press key to confirm. Function Mode Recall List Edit List Copyright © Itech Electronic Co., Ltd.
  • Page 56 Trig 21. Press to trigger. If in the remote control mode（USB / RS232 / Ether-net） ，you can refer to the following example to edit list operation (refer to IT8700 programming guide to get more). Copyright © Itech Electronic Co., Ltd.

  • Page 57: Triggered Operation

    In CC, CR mode, the maximum short current is 120% of the current range. In CV mode, short means setting the load’s constant voltage to be 0V. Copyright © Itech Electronic Co., Ltd.

  • Page 58: Input On/Off Operation

    VON voltage, do not set this value, otherwise it may result in unloading. IT8700 series electronic loads offer Von loading voltage and Von loading mode. ⚫...
  • Page 59 Von unload value, input won’t be turned off. Fig 4-11 VON LATCH load’s working range Von function panel operations Power on the electronic load Select a channel, such as channel 1 CH01 CC OFF Vdc=0.0000V Adc=0.0000A Copyright © Itech Electronic Co., Ltd.

  • Page 60: Protection Functions

    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 affect load’s on/off state. Shift Shift ⚫ Software OCP: users can set load’s software OCP value, steps: Copyright © Itech Electronic Co., Ltd.

  • Page 61: Over Power Protection (Opp)

    It can save up to 101 groups of setting parameters. The 0 group can be used as boot parameters. The 1 to 100 groups can be used as automatic Copyright © Itech Electronic Co., Ltd.

  • Page 62: Automatic Test Function

    Recall Group 4.13 Automatic test function IT8700 series electronic load has a very strong automatic test function. The automatic test function is useful for simulating various tests and allows the user to edit up to 10 groups of testing files. It helps engineers to test out all kinds of data of the tested power supply at different loading status.
  • Page 63 14. Save the edited files in Eeprom, you can save up to 10 groups of files, e.g please press numeric key to save the edited file in group 1, and then Enter Enter press to confirm. Save Program NO: 1 Copyright © Itech Electronic Co., Ltd.
  • Page 64 Voltage Lower Limit = 0.150V ▼ ▼ ▲ ▲ Press keys to select channel 5, in order to select the first step of channel 5, repeat 1）～6）steps, after editing the menu, press key to exit. Copyright © Itech Electronic Co., Ltd.

  • Page 65: Cr-Led Test Function

    4.14 CR-LED Test Function With adding of diode break-over voltage setting in the IT8700 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...
  • Page 66 Vd value. CR-LED Vdorp= 0.000V Enter 10. Press key to exit Calculation method of Vd and R Definition: ⚫ V: constant working voltage of load LED of LED constant current source; Copyright © Itech Electronic Co., Ltd.
  • Page 67 The value of V2, V1, I2 and I1should be close to the static working point of LED as shown in the red circle above. Or you can calculate the value of R and Vd by the following method. Vd=V*0.8 R=0.2V/I Copyright © Itech Electronic Co., Ltd.

  • Page 68: Chapter5 Specifications

    0~3A 0~20A Readback current Resolution 0. 01mA 0.1mA Accuracy ±(0.05%+0.05%FS) Range 250W Readback power Resolution 10mW Accuracy ±(0.2%+0.2%FS) Protection range ≒250W ≒3.3A ≒22A ≒82V ≒85℃ Specification ≒3.3/3A ≒22/20A Current（CC） Voltage（CV） Short-circuit Resistance ≒50mΩ （CR） Copyright © Itech Electronic Co., Ltd.
  • Page 69 Measuring range Range 0~18V 0~80V Readback Resolution 0.1 mV 1 mV voltage Accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS) Range 0~4.5A 0~45A Readback Resolution 0.1mA current Accuracy ±(0.05%+0.05%FS) Range 300W Readback Resolution 10mV power Accuracy ±(0.2%+0.2%FS) Protection range ≒310W Copyright © Itech Electronic Co., Ltd.
  • Page 70 Measuring range Range 0~18V 0~80V Readback Resolution 0.1 mV 1 mV voltage Accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS) Range 0~4A 0~40A Readback Resolution 0.1mA current Accuracy ±(0.05%+0.05%FS) Range 200W Readback Resolution 10mW power Accuracy ±(0.2%+0.2%FS) Protection range Copyright © Itech Electronic Co., Ltd.
  • Page 71 5uS+100ppm Rising/fallin Dynamic g slope 0.0001~0.25A/uS 0.001~2.5A/uS mode Rising ≒15uS ≒15uS time Measuring range Range 0~18V 0~80V Readback Resolution 0.1 mV 1 mV voltage Accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS) Range 0~6A 0~60A Readback current Resolution 0.1mA Copyright © Itech Electronic Co., Ltd.
  • Page 72 0.01%+0.0008S Input voltage 600W CP mode Input current 10mW Input power ±(0.2%+0.2%FS) Dynamic mode CC mode T1＆T2 20uS~3600S /Res:1u S Accuracy 5uS+100ppm Dynamic Rising/falling mode slope 0.0001~0.25A/uS 0.001~2.5A/uS Rising time ≒35uS ≒35uS Measuring range Copyright © Itech Electronic Co., Ltd.
  • Page 73 0.1mA CC mode ±(0.05%+0.05%FS) Accuracy ±(0.05%+0.05%FS) 0.3Ω~10Ω 10Ω~7.5KΩ Range CR mode Resolution 16bit Accuracy 0.01%+0.0008S 0.01%+0.08S Range 250W CP mode Resolution 10mW Accuracy ±(0.2%+0.2%FS) Dynamic mode CC Mode T1＆T2 20uS~3600S/Res:1uS Dynamic mode Accuracy 5uS±100ppm Copyright © Itech Electronic Co., Ltd.
  • Page 74 ±(0.05%+0.025%FS) Range 0~3A 0~20A Resolution 0.1mA CC mode Accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS) 0.25Ω~10Ω 10Ω~7.5KΩ Range CR mode Resolution 16bit Accuracy 0.01%+0.08S 0.01%+0.0008S Input voltage 300W CP mode Input current 10mW Input power ±(0.2%+0.2%FS) Dynamic mode Copyright © Itech Electronic Co., Ltd.
  • Page 75 Range 0~18V 0~500V CV mode Resolution 10mV Accuracy ±(0.05%+0.025%FS) ±(0.05%+0.025%FS) Range 0~3A 0~30A Resolution 0.1mA CC mode Accuracy ±(0.05%+0.05%FS) ±(0.05%+0.05%FS) 0.2Ω~10Ω 10Ω~7.5KΩ Range CR mode Resolution 16bit Accuracy 0.01%+0.08S 0.01%+0.0008S CP mode Range 500W Copyright © Itech Electronic Co., Ltd.
  • Page 76 ( 0～40 ℃) Input power 250W Min operation voltage 0.15V/3A 1.0V/20A Range 0~18V 0~80V CV mode Resolution 10mV Accuracy ±(0.05%+0.025%FS) ±(0.05%+0.025%FS) Range 0~3A 0~20A Resolution 0.1mA CC mode ±(0.05%+0.05%FS) Accuracy ±(0.05%+0.05%FS) 0.05Ω~10Ω 10Ω~7.5KΩ CR mode Range Copyright © Itech Electronic Co., Ltd.
  • Page 77 *7 Minimum rise time: 10%-90% current rise time Model IT8723P Input voltage 0~80V Input current 0~45A Rated value Input power 300W ( 0～40 ℃) Min operation 0.14V/4.5A 1.4V/45A voltage CV mode Range 0~18V 0~80V Copyright © Itech Electronic Co., Ltd.
  • Page 78 *4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current *5 Minimum rise time: 10%-90% current rise time Model IT8731P Input voltage 0~80V Rated value Input current 0~40A ( 0～40 ℃) Input power 200W Copyright © Itech Electronic Co., Ltd.
  • Page 79 *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) ） *3 The voltage/current input is no less than 10% FS *4 Ascending/descending slope: 10%-90% current ascending slope from 0 to maximum current *5 Minimum rise time: 10%-90% current rise time Copyright © Itech Electronic Co., Ltd.
  • Page 80 ≒6.6/6A ≒66/60A Current（CC） Short-circuit Voltage（CV） ≒25mΩ Resistance（CR） 300KΩ Input impedance dimension 82*183*573 weight safety *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) ） Copyright © Itech Electronic Co., Ltd.
  • Page 81 0. 1mA Accuracy ±(0.05%+0.05%FS) Range 600W Readback power Resolution 10mW Accuracy ±(0.2%+0.2%FS) Protection range ≒610W ≒13.2A ≒132A ≒82V ≒85℃ Specification ≒13.2/12A ≒132/120A Current（CC） Short-circuit Voltage（CV） ≒20mΩ Resistance（CR） 300KΩ Input impedance dimension 82*183*573 weight safety Copyright © Itech Electronic Co., Ltd.
  • Page 82 Range 0~3A 0~15A Readback current Resolution 0. 01mA 0.1mA Accuracy ±(0.05%+0.05%FS) Range 250W Readback power Resolution 10mW Accuracy ±(0.2%+0.2%FS) Protection range ≒260W ≒3.3A ≒16.5A ≒530V ≒85℃ Specification ≒3.3/3A ≒16.5/15A Current（CC） Short-circuit Voltage（CV） ≒260mΩ Resistance（CR） Copyright © Itech Electronic Co., Ltd.
  • Page 83 Readback voltage Resolution 1 mV 10 mV Accuracy ±(0.025%+0.025%FS) ±(0.025%+0.025%FS) Range 0~3A 0~20A Readback current Resolution 0. 01mA 0.1mA Accuracy ±(0.05%+0.05%FS) Range 300W Readback power Resolution 10mW Accuracy ±(0.2%+0.2%FS) Protection range ≒310W ≒3.3A ≒22A ≒530V Copyright © Itech Electronic Co., Ltd.
  • Page 84 0~18V 0~500V Range 1 mV 10 mV Readback voltage Resolution ±(0.025%+0.025%FS) ±(0.025%+0.025%FS) Accuracy 0~3A 0~30A Range 0. 01mA 0.1mA Readback current Resolution ±(0.05%+0.05%FS) Accuracy Range 500W Readback power Resolution 10mW Accuracy ±(0.2%+0.2%FS) Protection range Copyright © Itech Electronic Co., Ltd.

  • Page 85: Supplementary Characteristics

    Suggested calibration frequency: one time each year. Cooling style: fan. Fans control temperature: Temperature 35° C 50° C 70° C 85° C Fans status The first grade The second grade The third grade OTP Copyright © Itech Electronic Co., Ltd.

  • Page 86: Chapter6 Remote Operation

    <Shift> + <System>key. For each case, the electronic load will send a maximum of five characters after hold-off is asserted by the controller. The electronic load is capable of receiving up to fifteen additional characters after it asserts hold-off. Copyright © Itech Electronic Co., Ltd.
  • Page 87 Communication setting Before communication operation, please make sure that the following parameters of electronic load match that of PC. ⚫ Baud rate ：9600(4800、9600、19200、38400、57600、115200). You can enter system menu through panel to set communication baud rate. Copyright © Itech Electronic Co., Ltd.

  • Page 88: Ether Net Interface

    The device is SR1 capable. ⚫ The device is RL1 capable. ⚫ The device is DT1 capable. NOTE When communicating with PC, you can just select one method of all the communication methods above. Copyright © Itech Electronic Co., Ltd.

  • Page 89: Appendix

    Specifications of Red and Black Test Lines ITECH provides you with optional red and black test cables, which individual sales and you can select for test. For specifications of ITECH test cables and maximum current values, refer to the table below.
  • Page 90 Contact Us Thanks for purchasing ITECH products. In case of any doubts, please contact us as follows: 1. Visit ITECH website: www.itechate.com. 2. Select the most convenient contact method for further information.

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