I-Tech IT8900 Series User manual

Programmable DC Electronic
Load
Series IT8900 User’s Manual
Model: Series IT8900
Revision: V1.5

IT8900 User Manual
Notices
© Itech Electronic, Co., Ltd. 2019
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
IT8900-402589
Revision
Revision 1, published on
May. 28, 2019
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.
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 provides this customary
commercial license in software and
technical data pursuant to FAR 12.211
( Technical Data) and 12.212
( Computer Software) and, for the
Department of Defense, DFARS
252.227-7015 ( Technical Data –
Commercial Items) and DFARS
227.7202-3 ( Rights in Commercial
Computer Software or Computer
Software Documentation).
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.
NOTE
A NOTE sign denotes important
hint. It calls attention to tips or
supplementary information that
is essential for users to refer to.

IT8900 User Manual
Copyright © ITECH Electronic Co., Ltd. i
Certification and Quality Assurance
IT8900 series electronic load completely reaches nominal technical indicators
in the manual.
Warranty service
ITECH Company will provide one-year warranty services for the product
materials and manufacturing (excluding the following limitations).
When warranty service or repair is needed, please send the product to the
service unit specified by ITECH Company.
When the product is sent to ITECH Company for warranty service, the
customer must pay the one-way freight to the maintenance department of
ITECH, and ITECH will be responsible for return freight.
If the product is sent to ITECH for warranty service from other countries,
the customer will be responsible for all the freight, duties and other taxes.
Limitation of Warranty
Warranty service does not apply to the damage caused in the following
circumstances:
Damage resulting from customer-wired circuits or customer-supplied parts
or accessories;
Product which has been modified or repaired by the customer;
Damage caused by the circuit installed by the customer or damage caused
by operation of the product in non-specified environment;
The product model or serial number is altered, deleted, removed or made
illegible by customer;
Damage caused by accidents, including but not limited to lightning, water,
fire, abuse or negligence.
Safety signs
DC power
ON (with the power
switched on)
AC power
OFF (with the power
supply switched off)
Both DC and AC power supply
Power supply
switching-on status
Protective grounding terminal
Power supply
switching-off status
Grounding terminal
Reference terminal
Danger sign
Positive terminal
Warning sign (refer to specific
“Warning” or “Caution”
information in the manual)
Negative terminal
Ground wire connection end
sign
-
-

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Copyright © ITECH Electronic Co., Ltd. ii
Safety Precautions
General safety precautions below must be followed in each phase of instrument
operation. In case of failure to follow these precautions or specific warnings in
other parts of the manual, violation against the safety standards related to the
design, manufacture and purpose of the instrument will occur. If the user does
not follow these precautions, ITECH will bear no responsibility arising there
from.
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 electronic load is well grounded.
Use electric wires of appropriate load. All loading wires should be capable
of bearing maximum short-circuit of electronic load without overheating.
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.
To prevent burnout, please pay special attention to positive and negative
polarities of electronic load during connection!
Do not use damaged equipment. Please check the housing before using
the equipment. Check whether the instrument is subject to cracking or is
lack of plastic. Do not operate the instrument in the environment with
explosive gas, steam or dust.
Observe all tags on the equipment before connection.
Do not install alternative parts on the instrument or perform any
unauthorized modification.
Do not use the equipment when the removable cover is dismantled or
loose.
Please use the power adapter supplied by the manufacturer to avoid
accidental injury.
We do not accept responsibility for any direct or indirect financial damage
or loss of profit that might occur when using the instrument.
This instrument is used for industrial purposes, do not apply this product to
IT power supply system.
Do not use the equipment on the life support system or other equipment
with safety requirements.
SHOCK HAZARD Ground the Instrument. This product is provided with a
protective earth terminal. To minimize shock hazard, the instrument must
be connected to the AC mains through a grounded power cable, with the
ground wire firmly connected to an electrical ground (safety ground) at the
power outlet or distribution box. Any interruption of the protective
(grounding) conductor or disconnection of the protective earth terminal will
cause a potential shock hazard that could result in injury or death.
Before applying power, verify that all safety precautions are taken. All
connections must be made with the instrument turned off, and must be
performed by qualified personnel who are aware of the hazards involved.
Improper actions can cause fatal injury as well as equipment damage.
SHOCK HAZARD, LETHAL VOLTAGES This product can input the
dangerous voltage that can cause personal injury, and the operator must
always be protected from electric shock. Ensure that the input electrodes
are either insulated or covered using the safety covers provided, so that no
accidental contact with lethal voltages can occur.

IT8900 User Manual
Copyright © ITECH Electronic Co., Ltd. iii
Never touch cables or connections immediately after turning off the
instrument. Verify that there is no dangerous voltage on the electrodes or
sense terminals before touching them.
If the equipment is not used in the manner specified by the manufacturer,
its protection may be damaged.
Always use dry cloth to clean the equipment housing. Do not clean the
inside of the instrument.
Do not block the air vent of the equipment.
Environmental conditions
The IT8900 series electronic load can only be used indoors or in low
condensation areas. The following table shows general environmental
requirements for this instrument.
Environmental conditions
Requirement
Operating temperature
0°C - 40°C
Operating humidity
20% - 80% (non condensing)
Storage temperature
-20°C - 70 °C
Altitude
Operating up to 2,000 meters
Installation category
Ⅱ
Pollution degree
Pollution degree 2
Note
In order to ensure the accuracy of measurement, it is recommended to operate the
instrument half an hour after start-up.
Regulation tag
The CE tag shows that the product complies with
the provisions of all relevant European laws (if the
year is shown, it indicates that the year when the
design is approved).
This instrument complies with the WEEE directive
(2002/96/EC) tag requirements. This attached
product tag shows that the electrical/electronic
product cannot be discarded in household waste.
This symbol indicates that no danger will
happen or toxic substances will not leak or
cause damage in normal use within the
specified period. The service life of the product
is 10 years. The product can be used safely
within the environmental protection period;
otherwise, the product should be put into the
recycling system.

IT8900 User Manual
Copyright © ITECH Electronic Co., Ltd. iv
Waste electrical and electronic equipment (WEEE)
directive
Waste electrical and electronic equipment (WEEE) directive,
2002/96/EC
The product complies with tag requirements of the WEEE
directive (2002/96/EC). This tag indicates that the electronic
equipment cannot be disposed of as ordinary household
waste.
Product Category
According to the equipment classification in Annex I of the
WEEE directive, this instrument belongs to the “Monitoring”
product.
If you want to return the unnecessary instrument, please
contact the nearest sales office of ITECH.

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Copyright © ITECH Electronic Co., Ltd. v
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
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
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

IT8900 User Manual
Copyright © ITECH Electronic Co., Ltd. vi
CONTENT
Certification and Quality Assurance............................................................................................................................i
Warranty service .........................................................................................................................................................i
Limitation of Warranty ................................................................................................................................................i
Safety signs..................................................................................................................................................................i
Safety Precautions......................................................................................................................................................ii
Environmental conditions .........................................................................................................................................iii
Regulation tag ...........................................................................................................................................................iii
Waste electrical and electronic equipment (WEEE) directive...................................................................................iv
Compliance Information ............................................................................................................................................v
Chapter1 Inspection and Installation............................................................................................................. 1
1.1 Verifying the Shipment.........................................................................................................................................1
1.2 Instrument Size Introduction ...............................................................................................................................1
1.3 Connecting the cabinet ........................................................................................................................................9
1.4 Connecting the Power Cord .................................................................................................................................9
1.5 Connecting Test Lines.........................................................................................................................................10
Chapter2 Quick Start ................................................................................................................................... 12
2.1 Brief Introduction...............................................................................................................................................12
2.2 Front Panel Introduction ....................................................................................................................................13
2.3 Keyboard Introduction .......................................................................................................................................14
2.4 Fast function key ................................................................................................................................................14
2.5 Function description of VFD status indicators....................................................................................................15
2.6 Rear Panel Introduction .....................................................................................................................................15
2.7 Power-on Selftest ...............................................................................................................................................19
Chapter3 Function and Features.................................................................................................................. 22
3.1 Switching of local/remote operation modes......................................................................................................22
3.2 Constant-status operation mode .......................................................................................................................22
3.2.1 Constant current operation mode (CC) .......................................................................................................23
3.2.2 Constant voltage operation mode (CV).......................................................................................................24
3.2.3 Constant resistance operation mode (CR)...................................................................................................25
3.2.4 Constant power operation mode (CW) .......................................................................................................26
3.3 Input control function ........................................................................................................................................27
3.4 Keyboard locking function..................................................................................................................................27
3.5 Short-circuit analog function..............................................................................................................................27
3.6 System menu function (System).........................................................................................................................27
3.7 Configuration menu function (Config) ...............................................................................................................29
3.8 Triggering function .............................................................................................................................................30
3.9 Dynamic test function ........................................................................................................................................31
3.9.1 Continuous mode ........................................................................................................................................31
3.9.2 Pulse mode..................................................................................................................................................32
3.9.3 Toggle mode................................................................................................................................................34
3.10 OCP test function .............................................................................................................................................35
3.11 OPP test function .............................................................................................................................................36
3.12 Battery discharge test function ........................................................................................................................37
3.13 CR-LED test function ........................................................................................................................................38
3.14 Measurement of voltage or current rise/fall time ...........................................................................................39
3.15 Configuration save function .............................................................................................................................40
3.16 VON Function ...................................................................................................................................................41
3.17 Protective Function ..........................................................................................................................................42
3.18 List Operation...................................................................................................................................................44
3.19 Terminal function of rear panel........................................................................................................................46
3.19.1 Remote sense compensation functions.....................................................................................................47
3.19.2 External trigger function ...........................................................................................................................47
3.19.3 External analog quantity test....................................................................................................................48
3.19.4 External On/Off Control ............................................................................................................................48
3.19.5 Voltage fault indication.............................................................................................................................48

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Copyright © ITECH Electronic Co., Ltd. vii
3.19.6 Current monitoring (I Monitor) .................................................................................................................48
3.20 Auto Test Function ...........................................................................................................................................48
3.21 Parallel Function...............................................................................................................................................51
Chapter4 Technical Specifications ................................................................................................................ 53
4.1 Major technical parameters...............................................................................................................................53
Chapter5 References of Load Communication Interfaces............................................................................. 82
5.1 RS232 Interface ..................................................................................................................................................82
5.2 USB Interface......................................................................................................................................................83
5.3 GPIB Interface ....................................................................................................................................................84
5.4 LAN Interface......................................................................................................................................................84
5.5 CAN Interface .....................................................................................................................................................84
Appendix.............................................................................................................................................................. 86
Specifications of Red and Black Test Lines ...............................................................................................................86

Inspectionand Installation
Copyright © ITECH Electronic Co., Ltd. 1
Chapter1 Inspection and Installation
1.1 Verifying the Shipment
Open the package and check the articles within package box before operation.
In case of any non-conformity, missing or appearance wearing, please contact
ITECH immediately.
The package box should comprise:
Device name
Quantity
Model
Remarks
Electronic load 1 IT8900
series
Please refer to 2.1 Brief Introduction
for complete models of IT8900 series
electronic loads.
Power line 1
IT-E171/
IT-E172/
IT-E173/
IT-E174
The User may select different power
lines based on local outlet
specification. For detailed
specifications, refer to 1.3 Installation
of Power Line.
USB
communication
line
1 - -
Red and black
test lines
x - Number of the power cords vary
depending on the model.
CD 1 -
Comprising user manual and
documents related to programming
and grammatical guidelines.
Factory
alignment
report
1 - Test report before delivery.
Note
After confirming that package contents are consistent and correct, please appropriately
keep package box and related contents. The package requirements should be met when
the instrument is returned to factory for repair.
The IT8900 series load output test lines is shown in the following table.
Colour
Specification (Length: 2 meters)
Red
120A
Black
Red
240A
Black
Red
360A
Black
Red
350-500A
Black
Note:
The number of test cables shipped with different models
are different, subject to the actual product.
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

Inspectionand Installation
Copyright © ITECH Electronic Co., Ltd. 2
size.
IT8915-150-960/ IT8912-600-480/ IT8912-1200-240 load, refer to the
following dimension drawing:
IT8915-150-1200/IT8918-600-720/ IT8918-1200-360/ IT8922-150-1440/
IT8924-600-960/ IT8924-1200-480/ IT8930-150-1920 load, refer to the
following dimension drawing:

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Copyright © ITECH Electronic Co., Ltd. 3
IT8948-600-1920/ IT8948-1200-960 load, refer to the following dimension
drawing:

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Copyright © ITECH Electronic Co., Ltd. 4
IT8930-600-1200/ IT8930-1200-600/ IT8937-150-2400 load, refer to the
following dimension drawing:

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Copyright © ITECH Electronic Co., Ltd. 5
IT8936-600-1440/ IT8936-1200-720/ IT8945-150-2500 load, refer to the
following dimension drawing:

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Copyright © ITECH Electronic Co., Ltd. 6
IT8960-600-2400/IT8960-1200-1200/IT8972-600-2500/
IT8972-1200-1440/ IT8990-150-2500 load, refer to the following dimension
drawing:

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Copyright © ITECH Electronic Co., Ltd. 7
IT8990-600-2400/IT89135-150-2500/IT89108-600-2500/
IT89108-1200-720 load, refer to the following dimension drawing:

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Copyright © ITECH Electronic Co., Ltd. 8
IT89150-600-2400 load, refer to the following dimension drawing:

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Copyright © ITECH Electronic Co., Ltd. 9
1.3 Connecting the cabinet
Over 48KW models of IT8900 series consist of two or three cabinets. The
cabinet with front panel is the system master and others are slaves.
The user needs to connect system bus and load input terminals among
cabinets. Before connecting, the user needs to take apart the rear panel which
covers the terminals by using a screwdriver. Take example of three cabinets,
the wiring diagram is shown as follows. Please refer to 2.6 Rear Panel
Introduction for the detailed rear panel introduction.
1.4 Connecting the Power Cord
Connect power line of standard accessories and ensure that the electronic load
is under normal power supply.
The power cords supplied with this product is certified for safety. In case
the supplied lines assembly needs to be replaced, or an extension lines
must be added, be sure that it can meet the required power ratings of this
product. Any misuse voids the warranty of this product.

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Copyright © ITECH Electronic Co., Ltd. 10
AC power input level
Working voltage for IT8900 series electronic load is 100V~240V, AC power
input level: 100V~240V 50Hz/60Hz
Categories of power lines
Please select appropriate power lines appropriate to local voltage based on the
specifications of power lines below. If purchased model fails to meet local
voltage requirements, please contact distributor or factory for change.
China
IT-171
America, Canada,
Japan
IT-E172
Europe
IT-E173
Britain
IT-E174
Connecting the power cord
Before connecting the power cord, please ensure the power switch of the
instrument is turned OFF. Only use the power cord supplied as a standard
accessory. A summary of connection procedures is given below.
1.5 Connecting Test Lines
The test cables of IT8900 series are the standard accessories shipped with the
package box. Please refer to 1.1 Verifying the Shipment for the specification
of test cables.
Before connecting test lines, be sure to switch off the power supply
of the test loop in order to avoid electric shock.
Connecting the power cord

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Copyright © ITECH Electronic Co., Ltd. 11
To avoid electrical shock, before testing, please make sure the rating
values of the testing lines, and do not measure the current that higher
than the rating value.
Always use test lines provided by ITECH to connect the equipment. If
test lines from other factories are used, please check that the test line
can withstand maximum current.
Test line connection is given below taking local measurement as example.
For details of local and remote measurements, refer to “Functions of Rear
Panel Terminal”.
1. Before connecting the test lines, be sure that the instrument Power is
in Off position.
2. Unscrew the screws of the input terminals and connect the red and
black test lines to the input terminals. Re-tighten the screws.
When maximum current that one test line can withstand fails to meet
the current rated current, use several pieces of red and black test lines.
For example, the maximum current is 1,200A, then 4 pieces of 360A
red and black lines are required.
3. Directly connect the other end of the red and black lines to the DUT
terminal.