Programmable DC Electronic Load
Programmable DC Electronic
Load
Series IT8800 User’s Manual
Model: IT8813/IT8813B/IT8813C/IT8814/IT8814B/
IT8814C/IT8816/IT8816B/IT8816C/IT8817/
IT8817B/IT8817C/IT8818/IT8818B/IT8818C/
IT8818D/IT8830/IT8830B/IT8830H/IT8831/
IT8831B/IT8831H/IT8832/IT8832B/IT8832H/
IT8833/IT8833B/IT8833H/IT8834B/IT8834H/
IT8835B/IT8835H/IT8836B/IT8836H/IT8837B/
IT8837H/IT8838B/IT8838H/IT8839B/IT8839H
Revision: V2.2
IT8800 User’s Manual
Statement
According to the international copyright
law, reproduction of any part of this
manual in any form (including electronic
storage and retrieval or translation into
languages of other countries or regions)
is not allowed without prior permission
and written consent of Itech Electronics
Co., Ltd.
Manual Article No.
IT8800-402180
Revision
Revision 2, published on
October 21, 2016
Itech Electronics, Co., Ltd.
Trademark Statement
Pentium is a registered trademark of
Intel Corporation in the United States.
Microsoft, Visual Studio, Windows and
MS Windows are trademarks of
Microsoft Corporation in the United
States and/or other countries/regions.
Guarantee
Materials in the document are provided
talis qualis and may be changed in
future revisions without prior notice. In
addition, within the maximum allowable
extent of laws, ITECH is not committed
to any explicit or implied guarantee for
this manual and all information therein,
including but not limited to the implied
guarantee
on
marketability
and
availability for some special purposes.
ITECH shall not be responsible for any
error or incidental or indirect losses
caused by the provision, use or
application of this documents and
information therein. If some guarantee
clauses in other written agreements
between ITECH and users are not
consistent with clauses herein, those
clauses in other written agreements
shall prevail.
Technology license
Hardware and/or software in this
document cannot be provided without a
license and can only be used or copied
according to the license.
Restricted permission statement
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.
Safety Statement
“Caution” signs indicate danger. It is
required to pay attention to the contents
of these signs during implementation of
operations.
The damage to the product or loss of
important data may be caused in case of
improper operation steps or failure to
follow operation steps. Do not continue
to implement any improper operation
indicated in “Caution” signs when the
specified conditions are not fully
understood or these conditions are not
satisfied.
“Warning” indicates danger. It is required
to pay attention to the contents of these
signs
during
implementation
of
operation steps. Personal casualties
may be caused in case of improper
operation steps or failure to follow these
operation steps. Do not continue to
implement any improper operation
indicated in “Warning” signs when the
specified conditions are not fully
understood or these conditions are not
satisfied.
NOTE
“Instructions”
indicates
operation
instructions. It is required to refer to the
contents of these signs during operation
steps. These signs are used for
providing
tips
or
supplementary
information for operators.
IT8800 User’s Manual
Certification and Quality Assurance
IT8800 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
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
Copyright © ITECH Electronics Co., Ltd.
-
power
-
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IT8800 User’s Manual
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.
Do not use the equipment on the life support system or other equipment
with safety requirements.
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 IT8800 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
Operating temperature
Operating humidity
Storage temperature
Altitude
Installation category
Pollution degree
Requirement
0°C~40°C
0°C - 40°C
20% - 80% (non condensing)
-20°C - 70 °C
Operating up to 2,000 meters
Ⅱ
Pollution degree 2
Copyright © ITECH Electronics Co., Ltd.
ii
IT8800 User’s Manual
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.
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.
Copyright © ITECH Electronics Co., Ltd.
iii
IT8800 User’s Manual
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.
2.
3.
The product is intended for use in non-residential/non-domestic environments. Use of the
product in residential/domestic environments may cause electromagnetic interference.
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 Electronics Co., Ltd.
iv
IT8800 User’s Manual
Content
Certification and Quality Assurance ...................................................................................................................... 1
Warranty service ................................................................................................................................................... 1
Limitation of Warranty .......................................................................................................................................... 1
Safety signs ........................................................................................................................................................... 1
Safety Precautions ................................................................................................................................................ 2
Environmental conditions ..................................................................................................................................... 2
Regulation tag ....................................................................................................................................................... 3
Waste electrical and electronic equipment (WEEE) directive ................................................................................. 3
Compliance Information ....................................................................................................................................... 4
Chapter1
Acceptance and Installation ............................................................................................................. 1
1.1 Confirm package contents ............................................................................................................................... 1
1.2. Installation position ........................................................................................................................................ 2
1.3 Installation of power line ................................................................................................................................. 8
Chapter2
Quick Start ....................................................................................................................................... 9
2.1 Brief introduction ............................................................................................................................................ 9
2.2 Introduction of front panel ............................................................................................................................ 11
2.3 Introduction to the keypad ............................................................................................................................ 11
2.4 Fast function key ........................................................................................................................................... 12
2.5 Function description of VFD status indicators ................................................................................................ 13
2.6 Introduction of rear panel ............................................................................................................................. 13
2.7 Power-on selftest .......................................................................................................................................... 16
Chapter3
Function and Features .................................................................................................................... 19
3.1 Switching of local/remote operation modes .................................................................................................. 19
3.2 Constant-status operation mode ................................................................................................................... 19
3.2.1 Constant current operation mode (CC) ................................................................................................... 20
3.2.2 Constant voltage operation mode (CV) ................................................................................................... 21
3.2.3 Constant resistance operation mode (CR) ............................................................................................... 22
3.2.4 Constant power operation mode (CW) ................................................................................................... 23
3.3 Input control function ................................................................................................................................... 24
3.4 Keyboard locking function ............................................................................................................................. 24
3.5 Short-circuit analog function ......................................................................................................................... 24
3.6 System menu function (System) .................................................................................................................... 24
3.7 Configuration menu function (Config) ........................................................................................................... 26
3.8 Triggering function ........................................................................................................................................ 27
3.9 Dynamic test function ................................................................................................................................... 28
3.9.1 Continuous mode ................................................................................................................................... 28
3.9.2 Pulse mode ............................................................................................................................................ 29
3.9.3 Toggle mode ........................................................................................................................................... 31
3.10 OCP test function ........................................................................................................................................ 32
3.11 OPP test function ........................................................................................................................................ 33
3.12 Battery discharge test function .................................................................................................................... 34
3.13 CR-LED test function .................................................................................................................................... 35
Setting CR-LED Mode ..................................................................................................................................... 36
Copyright © ITECH Electronics Co., Ltd.
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IT8800 User’s Manual
3.14 Measurement of voltage rise time ............................................................................................................... 37
3.15 Configuration save function ......................................................................................................................... 38
3.16 VON function .............................................................................................................................................. 39
3.17. Protective function ..................................................................................................................................... 40
3.17.1 Over-voltage protection (OVP) ............................................................................................................. 40
3.17.2 Over-current protection (OCP) ............................................................................................................. 41
3.17.3 Over-power protection (OPP) ............................................................................................................... 41
3.17.4 Over-temperature protection (OTP) ..................................................................................................... 42
3.17.5 Input reverse polarity protection (LRV) ................................................................................................. 42
3.18 List operation (LIST) ..................................................................................................................................... 42
3.19 Terminal function of rear board ................................................................................................................... 44
3.19.1 Remote sense compensation functions ................................................................................................ 45
3.19.2 External trigger operation .................................................................................................................... 45
3.19.3 External analog quantity test ................................................................................................................ 46
3.19.4 External On/Off Control ........................................................................................................................ 46
3.19.5 Voltage fault indication terminal........................................................................................................... 46
3.19.6 Current monitoring (I Monitor) ............................................................................................................. 46
3.20 Auto test function ....................................................................................................................................... 46
Chapter4
Technical Specifications.................................................................................................................. 50
4.1 Major technical parameters .......................................................................................................................... 50
4.2 Additional features ........................................................................................................................................ 77
Chapter5
References of Load Communication Interfaces .............................................................................. 78
5.1 RS232 interface ............................................................................................................................................. 78
5.2 USB Interface ................................................................................................................................................ 79
5.3 GPIB interface ............................................................................................................................................... 80
Appendix ............................................................................................................................................................... 81
Specifications of Red and Black Test Lines ........................................................................................................... 81
Copyright © ITECH Electronics Co., Ltd.
vi
Acceptance and Installation
Chapter1 Acceptance and Installation
1.1 Confirm package contents
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
1
Model
IT8800 series
Remarks
IT8800 series include:
IT8813/IT8813B/IT8813C/
IT8814/ IT8814B/ IT8814C/
IT8816/ IT8816B/ IT8816C/
IT8817/ IT8817B/ IT8817C/
IT8818/ IT8818B/ IT8818C/
IT8830/ IT8830B/ IT8830H/
IT8831/ IT8831B/ IT8831H/
IT8832/ IT8832B/ IT8832H/
IT8833/ IT8833B/ IT8833H/
IT8818D/IT8834B/IT8834H/
IT8835B/IT8835H/IT8836B/
IT8836H/IT8837B/IT8837H/
IT8838B/IT8838H/IT8839B/
Electronic load
CD
1
-
Factory
alignment
report
USB
communication
line
1
-
IT8839H
Number of the power cords
vary depending on the model.
The User may select different
power lines based on local
outlet specification. For
detailed specifications, refer to
1.3 Installation of Power Line.
Comprising user manual and
documents related to
programming and grammatical
guidelines.
Test report before delivery.
1
-
-
Power cord
xN
IT-E171/IT-E17
2/
IT-E173/IT-E17
4
Copyright © ITECH Electronics Co., Ltd.
1
Acceptance and Installation
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.
1.2. Installation position
The instrument should be installed at well-ventilated and rational-sized space.
Please select appropriate space for installation based on the electronic load
size.
Model: IT8813/IT8814/IT8816/IT8813B/IT8814B/IT8816B/IT8813C/IT8814C/IT8816C
Overall dimensions:
Width: 482.7mm
Height: 131.4mm
Depth: 536mm
Detailed dimensional drawings
Copyright © ITECH Electronics Co., Ltd.
2
Acceptance and Installation
Model: IT8817/IT8817B/IT8817C/IT8818/IT8818B/IT8818C/IT8818D
Overall dimensions:
Width: 465mm
Height: 263.5mm
Depth: 535.5mm
Detailed dimensional drawings
Copyright © ITECH Electronics Co., Ltd.
3
Acceptance and Installation
Model: IT8830/IT8830B/IT8830H
Overall dimensions:
Width: 439mm
Height: 533mm
Depth: 680mm
Detailed dimensional drawings
Copyright © ITECH Electronics Co., Ltd.
4
Acceptance and Installation

Model: IT8831/IT8831B/IT8831H/IT8832/IT8832B/IT8832H/IT8833/
IT8833B/ IT8833H/IT8834B/IT8834H
Overall dimensions: 800 mmW x 800mmD x 1388mmH, Refer to the
following dimension drawing:
Copyright © ITECH Electronics Co., Ltd.
5
Acceptance and Installation

Model: IT8835B/IT8835H/IT8836B/IT8836H/IT8837B/IT8837H
Overall dimensions: 800mmW x 800mmD x 1765mmH, Refer to the
following dimension drawing:
Copyright © ITECH Electronics Co., Ltd.
6
Acceptance and Installation

Model: IT8838B/IT8838H/IT8839B/IT8839H
Overall dimensions: 800mmW x 800mmD x 1987mmH, Refer to the
following dimension drawing:
Copyright © ITECH Electronics Co., Ltd.
7
Acceptance and Installation
1.3 Installation of power line
Connect power line of standard accessories and ensure that the electronic load
is under normal power supply.
AC power input level
Working voltage of IT8800 series includes 110V and 220V (which can be
selected by the switch on rear board of load). When IT8800 series load power
is greater than or equal to 35KW, the 110V AC power input is not supported. AC
power input level:
 Option Opt.1: 220Vac
50Hz/60Hz
 Option Opt.2: 110Vac
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.
N
L
L
E
E
E
E
N
N
L
L
China
America, Canada
Europe
UK
IT-E171
IT-E172
IT-E173
IT-E174
Copyright © ITECH Electronics Co., Ltd.
N
8
Quick Start
Chapter2 Quick Start
This Chapter will introduce power-on check steps of IT8800 Series to ensure
normal start-up and usage under initialization status of the load. Besides, to
facilitate usage, this part also displays the functions of front board, rear board
and keyboard keys as well as display functions of VFD (Vacuum Fluorescent
Display) to a quick view of load appearance, structure and key usage functions
before operation.
2.1 Brief introduction
IT8800 Series is a single-input programmable DC electronic load. Built in with
RS232, USB and GPIB communication interfaces, this series of programmable
DC electronic load provides a multi-purpose solution to meet different design
and test requirements.
This Series delivers special functions and advantages at international level,
including:
 High-visibility vacuum fluorescent display (VFD)
 Dynamic mode: up to 25KHz
 Voltage measurement dissolution rate: up to 0.1 mV Current 0.01 mA (10
uA)
 Voltage and current measurement speed: up to 50 KHz
 Four operation modes: constant voltage, constant current, constant
resistance and constant power.
 Rotary coding switch for easy and quick operation
 Remote sense function
 Battery test function
 OCP test, OPP test
 Auto test function
 CR-LED test
 Memory capacity: 100 groups
 Short-circuit function
 Dynamic test function
 Portable and robust enclosure equipped with skid resistant foot stand
 Intelligent fan control
 Built-in Buzzer, for warning
 Outage backup memory
 Built-in GPIB, USB and RS232 communication interfaces
Model Selection Table for IT8800 Series:
Model
IT8813
IT8813B
IT8813C
IT8814
IT8814B
Voltage
120V
500V
120V
120V
500V
Current
60A
30A
120A
120A
60A
Power
750W
750W
1500W
1500W
1200W
Copyright © ITECH Electronics Co., Ltd.
Height
3U
3U
3U
3U
3U
9
Quick Start
Model
IT8814C
IT8816
IT8816B
IT8816C
IT8817
IT8817B
IT8817C
IT8818
IT8818B
IT8818C
IT8818D
IT8830
IT8830B
IT8830H
IT8831
IT8831B
IT8831H
IT8832
IT8832B
IT8832H
IT8833
IT8833B
IT8833H
IT8834B
IT8834H
IT8835B
IT8835H
IT8836B
IT8836H
IT8837B
IT8837H
IT8838B
IT8838H
IT8839B
IT8839H
Voltage
120V
120V
500V
120V
120V
500V
120V
120V
500V
120V
60V
120V
500V
800V
120V
500V
800V
120V
500V
800V
120V
500V
800V
500V
800
500V
800V
500V
800V
500V
800V
500V
800V
500V
800V
Current
240A
240A
100A
480A
360A
120A
600A
480A
150A
720A
700A
500A
200A
100A
750A
300A
150A
1000A
400A
200A
1500A
500A
250A
600A
300A
700A
350A
800A
400A
900A
450A
1000A
500A
1100A
600A
Power
1500W
3000W
2500W
3000W
4500W
3600W
4500W
6000W
5000W
6000W
6000W
10KW
10KW
10KW
15KW
15KW
15KW
20KW
20KW
20KW
25KW
25KW
25KW
30KW
30KW
35KW
35KW
40KW
40KW
45KW
45KW
50KW
50KW
55KW
55KW
Copyright © ITECH Electronics Co., Ltd.
Height
3U
3U
3U
3U
6U
6U
6U
6U
6U
6U
6U
12U
12U
12U
27U
27U
27U
27U
27U
27U
27U
27U
27U
27U
27U
37U
37U
37U
37U
37U
37U
42U
42U
42U
42U
10
Quick Start
2.2 Introduction of front panel
Front panel introduction of IT8813/IT8814/IT8816/IT8813B/IT8814B/IT8816B/
IT8813C/ IT8814C/IT8816C, and front panel introduction of IT8817/IT8817B/
IT8817C/IT8818/IT8818B/IT8818C/ IT8818D/IT8830/IT8830B/IT8830H/
IT8831/IT8831B/IT8831H/IT8832/IT8832B/IT8832H/IT8833/IT8833B/IT8833H/
IT8834B/IT8834H/IT8835B/ IT8835H/IT8836B/IT8836H/IT8837B/IT8837H/
IT8838B/IT8838H/IT8839B/ IT8839H as below except cooling window.
①
②
④
⑤
⑥
⑦
③
1.
2.
3.
4.
5.
6.
Power switch
VFD screen
Adjusting knob
Function keys
Numeric keys, Esc keys and composite keys
Arrow Keys and Enter Key
2.3 Introduction to the keypad
The keypad of IT8800 series is shown in the next figure.
The following table explains the keys and buttons on the keypad.
Shift
Recall
Tran
Trig
List
Pause
Enables access to secondary functions.
Recalls stored instrument setting.
Configures transient parameters.
Sets the load to trigger mode for list and transient function.
Configures list parameters.
To pause operation during automatic test.
Copyright © ITECH Electronics Co., Ltd.
11
Quick Start
CC
CV
CR
Sets the load to CC mode and configures the current value.
Sets the load to CV mode and configures the voltage value.
Sets the load to CR mode and sets the resistance value.
CW
Enter
On/Off
Sets the load to CW mode and configures the power value.
Confirms settings.
Turns the instrument on or off.
Up key, to select menu items during menu operation.
Down key, to select menu items during menu operation.
OK
0-9
.
ESC
×10
×1
Right key, to adjust the cursor to the specified location to set the
value.
Left key, to adjust the cursor to the specified location to set the
value.
Confirms settings.
Enters numeric values for various parameters.
Decimal point.
Cancels the current action and returns to the previous menu.
Rotary knob to adjust the setups by 10 stepping.
Rotary knob to adjust the setups by 1 stepping.
2.4 Fast function key
A combination of front board keys and Shift composition keys in IT8800 Series
can realize functions marked at key bottom. For details, see table below.
Shift+1 (Short)
To start or end short circuit test.
Shift +2 (program)
Auto test function.
Shift +3 (Battery)
Battery test function.
Shift +4 (Save)
To save existing setting load parameter values, e.g.,
Shift +5 (System)
voltage, current and power.
To set system menu.
Shift +6 (Config)
Shift +7 (Info)
Shift +8 (Lock)
Shift +9 (Local)
Shift + CC (OCP)
Shift + CV (Setup)
Shift + CW (OPP)
To configure system menu.
To display model, version number and serial number of
electronic load.
Keyboard locking function.
LOCAL key, to shift local and remote operation.
OCP test function.
To set specific parameters of constant voltage, constant
current, constant resistance and constant power.
OPP test function.
Copyright © ITECH Electronics Co., Ltd.
12
Quick Start
2.5 Function description of VFD status indicators
OFF
The load is off.
Error
The load has error.
The load is waiting for
The load is under constant
CC
Trig
current mode.
triggering signal.
The load is under remote
The load is under constant
CV
Sense
voltage mode.
sense input mode.
The load is under software
The load is under constant
CR
Prot
resistance mode.
over-current protection status.
Start external analog quantity
The load is under constant
CW
Rear
power mode.
function.
The load is under remote
Rmt
Auto
Start automatic voltage range.
operation mode.
Send command under remote
Addr
*
Start keyboard locking function
operation.
SRQ
Serial request query.
Shift
Shift key is pressed.
2.6 Introduction of rear panel

Rear panel of IT8813/IT8814/IT8816/IT8813B/IT8814B/ IT8816B/
IT8813C/ IT8814C/IT8816C.
①
②
③ ④
⑤ ⑥
⑦
⑧
⑨
1.
2.
3.
Input terminal
Current detection terminal
Remote sense compensation terminal, external triggering terminal and
external analog 0-10V control terminal
4.
5.
6.
7.
8.
9.
External signal control interface
RS232 communication cable interface
USB communication cable interface
GPIB communication cable interface
AC power switch key
AC power input socket (including fuse)
Copyright © ITECH Electronics Co., Ltd.
13
Quick Start

Rear panel of IT8817/IT8817B/IT8817C/IT8818/IT8818B/IT8818C/
IT8818D.
①

② ③ ④
⑤ ⑥
⑦
⑧
⑨
Rear panel of IT8830/IT8830B/IT8830H.
①
②
③
④ ⑤ ⑥ ⑦
⑧
⑨
Copyright © ITECH Electronics Co., Ltd.
14
Quick Start

Rear panel of IT8831/IT8831B/IT8831H/IT8832/IT8832B/IT8832H/IT8833/
IT8833B/IT8833H/IT8834B/IT8834H/IT8835B/IT8835H/IT8836B/IT8836H/
IT8837B/IT8837H/IT8838B/IT8838H/IT8839B/IT8839H.
(Take IT8839H as an example, for other types, the number of fans and the
position of the red box marked in the following figure are different.)
The detail of the red box in the figure above is as shown as follows:
①
④ ⑤ ⑥ ⑦ ⑨
②
1.
2.
③
⑧
Input terminal
Current detection terminal
Copyright © ITECH Electronics Co., Ltd.
15
Quick Start
3.
Remote sense compensation terminal, external triggering terminal and
external analog 0-10V control terminal
4.
5.
6.
7.
8.
9.
External signal control interface
RS232 communication cable interface
USB communication cable interface
GPIB communication cable interface
AC power switch key
AC power input socket (including fuse)
2.7 Power-on selftest
A successful self-test indicates that the purchased load product meets delivery
standards and is available for normal usage.
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 electronic load is well
grounded.
To avoid burning out, pay attention to marks of positive and negative
polarities before wiring.
Self-test steps
Normal self-test procedures:
1. Correctly connect the power line. Press Power key to start up.
The VFD screen of electronic load displays software version number "BOIS
Ver. 1.10".
2. After approximate 1s, the system is under self-test and the VFD display
shows “System Self-test…”
3. After self-test, the VFD display information below.
0.0000V
0.0000A
0.00W CC=0.000A
Information description:
 The first line displays actual input voltage and current values.
 The second line displays setting values of actual power value and
current (voltage, power and resistance).
4. Press [Shift] + 7 (Info), the electronic load VFD screen displays related
information of the product. Press
Copyright © ITECH Electronics Co., Ltd.
key to switch display of product
16
Quick Start
model, product serial number and software version number.
Model: IT88XX
Ver.: 1.XX-1.XX
SN: XXXXXXXXXXXXXXXXXX
----End
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.
3.
4.
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.
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.
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.
2)
If the fuse is fused, please change fuse of same specification based on
machine model. See the table blow for matching information of fuse
and machine model.
Products
Specification (110VAC)
Specification (220VAC)
IT8813/13B/13C T 3.15A
250VAC
T 1.5A 250VAC
IT8814/14B/14C T 3.15A
250VAC
T 1.5A 250VAC
IT8816/16B/16C T 3.15A
250VAC
T 1.5A 250VAC
IT8817/17B/17C T 5A
250VAC
T 2.5A 250VAC
IT8818/18B
T 5A
250VAC
T 2.5A 250VAC
IT8818C/18D
T 5A
250VAC
T 2.5A 250VAC
IT8831/31B/31H T 6.30A
250VAC
T 3.15A 250VAC
IT8832/32B/32H T 6.30A
250VAC
T 3.15A 250VAC
Copyright © ITECH Electronics Co., Ltd.
17
Quick Start
IT8833/33B/33H
T 6.30A
250VAC
T 3.15A
250VAC
IT8834B/34H
T 6.30A
250VAC
T 3.15A
250VAC
IT8835B/35H
Does not support 110VAC input
T 3.15A
250VAC
IT8836B/36H
Does not support 110VAC input
T 3.15A
250VAC
IT8837B/37H
Does not support 110VAC input
T 3.15A
250VAC
IT8838B/38H
Does not support 110VAC input
T 3.15A
250VAC
IT8839H/39H
Does not support 110VAC input
T 3.15A
250VAC
3)
After replacement, install the fuse box back to original position, as
shown below.
----End
Copyright © ITECH Electronics Co., Ltd.
18
Function and Features
Chapter3 Function and Features
This Chapter will give a detailed description of functions and features of the
electronic load. It is divided into the following parts:
 Switching of local/remote operation modes
 Constant-status operation mode
 Input control function
 Keyboard locking function
 Dynamic simulation function
 System menu function
 Configuration menu function
 Triggering function
 Dynamic test function
 OCP test function
 OPP test function
 Battery discharge test function
 CR-LED function
 Measurement of voltage rise time
 Save function
 VON function
 Protective function
 List function
 Terminal function of rear board
 Auto test function
3.1 Switching of local/remote operation modes
The electronic load is provided with local and remote operation modes. These
two modes can be switched through communication commands. At initialization,
the electronic load is defaulted under local operation mode.
 Local operation mode: for operating related functions through keys on the
electronic load machine.
 Remote operation mode: for operating related functions of the electronic
load on PC through a connection between the electronic load and PC.
Under remote operation mode, except [Shift] + 9 (Local) keys, other keys
on the board are disabled. The [Shift] + 9 (Local) key can be used for
switching to local operation mode.
3.2 Constant-status operation mode
The electronic mode can work under the 4 constant-state operation modes:
 Constant current operation mode (CC)
 Constant voltage operation mode (CV)
 Constant resistance operation mode (CR)
Copyright © ITECH Electronics Co., Ltd.
19
Function and Features

Constant power operation mode (CW)
3.2.1 Constant current operation mode (CC)
Under CC mode, the electronic load will consume constant current in
regardless of whether the input voltage changes or not, as shown in Fig. 3-1.
I
Set current
Load
current
Set voltage
CC mode
V
Fig. 3-1 Voltage-Current Relation Schema under CC Mode
Under CC mode, the electronic load provides three ways to set constant
current.
 Under CC mode, rotate the pulse knob to change constant current value.
 Under CC mode, directly input numeric key and press [Enter] key for
confirmation to change constant current value.
 Under CC mode, move the cursor with Left/Right Key and press Left/Right
Key to adjust value at corresponding position.
Operation steps
1.
2.
Press [CC] key and [Shift] + [CV] to enter parameter setting screen.
Constant
Current
Range=0.000A
Set maximum working current value and press [Enter] key.
Constant
Current
Range =1.000A
3.
Set maximum voltage value and press [Enter] key.
Constant
Current
High=0.00V
4.
Set minimum voltage value and press [Enter] key for confirmation.
Constant
Current
Low=0.000V
5.
Set high and low rate and press [Enter] key for confirmation.
Constant
High-Rate
6.
Current
Low-Rate
Set ascending slope and press [Enter] key for confirmation.
Constant
Current
Rise up=0.000A/uS
7.
Set descending slope and press [Enter] key for confirmation.
Copyright © ITECH Electronics Co., Ltd.
20
Function and Features
Constant
Current
Rise down=0.000A/uS
8.
Complete parameter setting.
10.0000V 0.0000A
0.00W CC=1.000A
----End
NOTE
If the above method is for editing auto test step (as mentioned below), constant current
range can also be set.
3.2.2 Constant voltage operation mode (CV)
Under CV mode, the electronic load will consume sufficient current to maintain
the input voltage at setting voltage. As shown in Fig. 3-2.
V
Set voltage
Load
voltage
Set current
CV mode
I
Fig. 3-2 Voltage-Current Relation Schema under CV Mode
Under CV mode, the electronic load provides three ways to modify constant
voltage.
 Under CV mode, rotate the pulse knob to change constant voltage value.
 Under CV mode, directly input numeric key and press [Enter] key for
confirmation to change constant voltage value.
 Under CV mode, move the cursor with Left/Right Key and press Left/Right
Key to adjust value at corresponding position.
Operation steps
1.
Press [CV] key and [Shift] + [CV] to enter parameter setting screen.
Constant
2.
3.
Voltage
Range=120.00V
Set maximum working voltage value and press [Enter] key for
confirmation.
Constant
Voltage
Range=2.33V
Set maximum current value and press [Enter] key for confirmation.
Constant
Voltage
High=66.000A
Copyright © ITECH Electronics Co., Ltd.
21
Function and Features
4.
Set minimum current value and press [Enter] key for confirmation.
Constant
Voltage
Low=0.0000A
5.
Complete parameter setting.
10.0000V 0.0000A
0.00W CV=2.33V
----End
NOTE
If the above method is for editing auto test step (as mentioned below), constant voltage
range can also be set.
3.2.3 Constant resistance operation mode (CR)
Under CR mode, the electronic load is equivalent to a constant resistance (as
shown below) and will give linear change of current with input voltage change.
As shown in Fig. 3-3:
V
Straight slope is set resistance value
Load
voltage
Load current
CR mode
I
Fig. 3-3 Voltage-Current Relation Schema under CR Mode
Under CR mode, the electronic load provides three ways to modify constant
resistance.
 Under CR mode, rotate the pulse knob to change constant resistance
value.
 Under CR mode, directly input numeric key and press [Enter] key for
confirmation to change constant resistant value.
 Under CR mode, move the cursor with Left/Right Key and press Left/Right
Key to adjust value at corresponding position.
Operation steps
1.
Press [CR] key and [Shift] + [CV] to enter parameter setting screen.
Constant
Resistance
Range=7500.0Ω
2.
Set maximum working resistance value and press [Enter] key.
Constant
Resistance
Range =2Ω
3.
Set maximum voltage value and press [Enter] key.
Copyright © ITECH Electronics Co., Ltd.
22
Function and Features
Constant
Resistance
High=130.0V
4.
Set minimum voltage value and press [Enter] key for confirmation.
Constant
Resistance
Low=0.000V
5.
Complete parameter setting.
10.0000V
0.0000A
0.00W CR=2.000Ω
----End
NOTE
If the above method is for editing auto test step (as mentioned below), constant
resistance range can also be set.
3.2.4 Constant power operation mode (CW)
Under CW mode, the electronic load will consume a constant power, as shown
below. If input voltage rises, the input current decreases and power P (= V * I)
will maintain at setting power. As shown in Fig. 3-4:
V
Input
V2
voltage
V3
Set power
I2
I3
Load current
I
CP mode
Fig. 3-4 Voltage-Current Relation Schema under CW Mode
Under CW mode, the electronic load provides three ways to modify constant
power.
 Under CW mode, rotate the pulse knob to change constant power value.
 Under CW mode, directly input numeric key and press [Enter] key for
confirmation to change constant power value.
 Under CW mode, move the cursor with Left/Right Key and press Left/Right
Key to adjust value at corresponding position.
Operation steps
1.
Press [CW] key. Press [Shift] + [CV] to enter parameter setting screen.
Constant
2.
Power
Range=400.00W
Set maximum working power value and press [Enter] key.
Constant
Power
Copyright © ITECH Electronics Co., Ltd.
23
Function and Features
3.
Range =1.00W
Set maximum voltage value and press [Enter] key.
Constant
4.
High=130.00V
Set minimum voltage value and press [Enter] key.
Constant
5.
Power
Power
Low=0.000V
Complete parameter setting.
10.0000V
0.0000A
0.00W CW=1.00W
----End
NOTE
If the above method is for editing auto test step (as mentioned below), constant power
range can also be set.
3.3 Input control function
Control input switch of the electronic load by pressing [On/Off] key on the front
board. If [On/Off] lamp is on, the input is on; and if [On/Off] lamp is off and the
input is off. When the electronic load is on, the VFD working status indicator is
OFF.
3.4 Keyboard locking function
Press the composite key [Shift] + 8 to lock the instrument board key, and the
VFD displays *. Under this function status, the setting value cannot be changed
and the mode cannot be switched. Press this key again to cancel locking.
3.5 Short-circuit analog function
The load can analog a short circuited circuit at input terminal. Under board
operation, press the [Shift] + 1 key to switch short circuit status. The short
circuit status does not influence existing setting value. When the [Shift] + 1 are
pressed again, the load returns back to original setting status.
Actual current value consumed by load at short circuit depends on the existing
working mode of load and current range. Under CC, CW and CR modes,
maximum short-circuit current is 110% of current range. Under CV mode, short
circuit current is equivalent to that constant voltage value of load is 0 V.
3.6 System menu function (System)
Initialize
Press [Shift] + 5 to enter system menu setting (SYSTEM MENU).
INITIALIZE SYSTEM?
Copyright © ITECH Electronics Co., Ltd.
24
Function and Features
NO
Keep existing configurations
YES
Recover all configurations to factory set
values
POWER-ON PARAMENT
RST(default)
Set the input status of load at powering
on as "status as delivered"
SAV0
Set the input status of load at powering
on as SAVE 0 value
BUZZER STATE
Set the buzzer status
On (default)
Set the buzzer as ON status.
Off
Set the buzzer as OFF status.
LOAD ON KNOB MODE
Set the pulse knob
Update(default)
Real-time update
Old
Not update
TRIGGER SOURCE
Set triggering mode
Manual (Def)
Manual trigger
External
External signal trigger mode
Hold
Trig: IMM valid
Bus
GPIB bus trigger mode
Timer
Timer trigger mode
MEMORY
Operated with Recall button to recall 100
groups memories.
Group=(0-9)
0: represent group 1-10, 1: represent
11-20, and so on.
DISPLAY ON TIMER
Screen displays loading time
On
Start function
Off (default)
Stop function
COMMUNICATION
Select the interface for communication
with a computer
RS232
After interface entry, press the
Arrow Key to select RS232
configuration
4800, 8, N non parity check, 1, NONE
Power-ON
Buzzer
Knob
Trigger
Memory
Displ
Communication
9600 E even parity check CTS/RTS
19200 O odd parity check XON/XOFF
38400
57600
115200
USBTMC
GPIB
Address (0-31)
PROTOCOL
Protocol
SCPI (Default)
SCPI protocol
Extend-Table
Expand SCPI protocol for compatibility of
other machines
Copyright © ITECH Electronics Co., Ltd.
25
Function and Features
3.7 Configuration menu function (Config)
Press [Shift] + 6 (Config) keys to enter menu configuration.
VON LATCH
Start judgment voltage of load
On
Von
Start LATCH function
Point= 2V
Set load voltage
Off
Stop LATCH function
Point= 2V
Set load voltage
PROTECT MENU
Max-p
Set hardware power protection
MAX POWER
Set hardware protective power
value
Point=149.99W
A-Limit
Set software current protection
CURRENT LIMIT
On
Protect
Start function
Point=30A
Set software current protective
value
Delay= 3S
Set software current protective
delay
Off
Stop function
P- Limit
Set software power protection
POWER LIMIT
Point=150W
Set software power protective
value
Delay= 3S
Set software power protective
delay
Time
Set LOAD ON timer
ON-TIMER
On
Start function
Delay=10S
Set LOAD ON timer value
Off
Stop function
MEASURE MENU
V-Range
Auto switch function of voltage range
VOLTAGE AUTO RANGE
Measure
On
Start auto voltage range
Off
Stop auto voltage range
TimeV1
Measure voltage rise/drop time
TIMER VOLTAGE1
Point=0.000V
TimeV2
Set starting voltage value
Measure voltage rise/drop time
TIMER VOLTAGE2
Point=120.00V
FILTER
Set stop voltage value
Smoothing function
Copyright © ITECH Electronics Co., Ltd.
26
Function and Features
Average Count=2^(2~16)
CR LED MODE
CR-LED
Remote-Sense
Analog LED lamp function (under CR mode)
On
Open function (Under CR mode,
press [Shift] + [CV] to set Vd
value)
Off
Stop function
REMOTE SENSE STATE
Remote sense
measurement
On
Start
remote
compensation function
sense
Off
Stop
remote
compensation function
sense
EXTNAL PROGRAM
Ext-Program
Set of average count
compensation
External analog quantity function
On
Start external 0-10V analog quantity control
function
Off
Stop external 0-10V analog quantity control
function
3.8 Triggering function
Triggering function is necessary to operate dynamic pulse output and list output.
There are five triggering methods to synchronously trigger the tested
instrument.
Optional triggering sources of triggering function of electronic load comprise:
 Key ([Trig] key) trigger: when key trigger is valid, press [Trig] key and the
load will trigger an operation.
 External trigger signal (TTL): TRIG on the rear board is the triggering
input terminal. When external trigger signal method is effective, after
applying a low pulse (> 10 us), the load will trigger an operation.
 Bus trigger: when the bus trigger is valid, after the load receives a trigger
command (GET or *TRG) from GPIB port, the load will trigger an operation.
 Timing trigger: when the timing trigger is valid, the load will automatically
trigger an operation at intervals.
 Trigger holding: when trigger holding is valid, only when the load receives
trigger command (TRIG: IMM), the load will trigger an operation.
Select the triggering sources as follows:
Operation steps
1.
2.
3.
Press [Shift] + 5 (system) to enter system menu setting screen.
Initialize Power-ON Buzzer
Press Left/Right key and move to Trigger. Press [Enter] to enter triggering
source selection screen.
Manual (Def) External Hold
Press Left/Right key to select trigger method. Press [Enter] to complete
setting.
Copyright © ITECH Electronics Co., Ltd.
27
Function and Features
Manual (Def): Manual trigger
External: external signal trigger
Hold: special command trigger
Bus: BUS command trigger
Timer: timer trigger
4. Press [Esc] to exit setting. The system displays original values under
different modes.
----End
3.9 Dynamic test function
Through dynamic test operation, the electronic load can be switched between
two setting parameters based on setting rules. This function can be used to test
dynamic performances of power supply. For dynamic test operation, press
[Tran] key on the front board to enter the dynamic setting menu. Before test,
firstly, set parameters related to dynamic test operation, including dynamic test
mode, A value, B value, pulse width time, frequency, duty ratio, etc. Under CC
mode, current ascending and descending slopes should be set for dynamic
test.
The dynamic test mode can be divided into continuous mode, pulse mode and
toggle mode.
3.9.1 Continuous mode
Under continuous mode, after enabling dynamic test operation, the load will be
switched continuously between A value and B value.
Taking CC mode as example (operations under other modes are similar), when
output voltage and current of the tested instrument are 10V and 3A respectively,
the load current will switch from 1A and 2A. Set the dynamic test parameters
and perform the test as follows:
1.
Press [Tran] key. Operate Left/Right key. Move to On and press
confirmation.
for
TRANSITION
On Off
Copyright © ITECH Electronics Co., Ltd.
28
Function and Features
2.
Select Continuous, Press [Enter] key (The Trig lamp that indicates VFD
screen status is on).
TRANSITION
3.
Continuous Pulse Toggle
Operate Left/Right key and select high range and low range. Move to the
High-Rate and press [Enter] key.
TRANSITION
4.
High-Rate Low-Rate
Set ascending slope and press [Enter] key.
TRANSITION
5.
Rise up=2.000A/uS
Set descending slope and press [Enter] key for confirmation.
TRANSITION
6.
Rise down=2.000A/uS
Set A value and press [Enter] key for confirmation.
TRANSITION
7.
Level A=1A
Set B value and press [Enter] key for confirmation.
TRANSITION
8.
Level B=2A
Set frequency value and press [Enter] key for confirmation.
TRANSITION
9.
Frequency=50Hz (0.01-25000Hz)
Set duty ratio and press [Enter] key for confirmation.
TRANSITION
Duty=98% (0.1%-99.9%)
10. Start dynamic test and operate Left/Right key. Move to On and press
[Enter] key for confirmation.
TRANSITION
On Off
11. Enter the dynamic test mode.
10.0000V
0.0000A
0.00W 0 TRAN
12. Press [On/Off] key and press [Trig] key.
The load will continuously switch between A and B value. Time of
operations is shown at bottom right.
13. Press CC/CV/CR/CW key or any composite function key to exit dynamic
test function. Repeat Steps 1-12 to continue parameter setting and
operation of dynamic test.
----End
3.9.2 Pulse mode
Under pulse mode, after enabling dynamic test operation, the load will switch to
B value every time after receipt of a trigger signal and switch back to A value
after maintaining B for pulse width time.
Copyright © ITECH Electronics Co., Ltd.
29
Function and Features
10A
5A
TWD
10ms
TWD
10ms
TRIG
TRIG
Pulsed Transient Operation
Taking CC mode as example (operations under other modes are similar), when
output voltage and current of the tested instrument are 10V and 3A respectively,
the load current will switch from 1A and 2A. Set the dynamic test parameters
and perform the test as follows:
1. Press [Tran] key. Operate Left/Right key. Move to On and press [Enter] for
confirmation.
TRANSITION
On Off
2. Select Continuous, Press [Enter] key (The Trig lamp that indicates VFD
screen status is on).
TRANSITION
Continuous Pulse Toggle
3. Operate Left/Right key and select high range and low range. Move to the
High-Rate and press [Enter] key.
TRANSITION
High-Rate Low-Rate
4. Set ascending slope and press [Enter] key.
TRANSITION
Rise up=2.000A/uS
5. Set descending slope and press [Enter] key for confirmation.
TRANSITION
Rise down=2.000A/uS
6. Set A value and press [Enter] key for confirmation.
TRANSITION
Level A=1A
7. Set B value and press [Enter] key for confirmation.
TRANSITION
Level B=2A
8. Set time width and press [Enter] key for confirmation.
TRANSITION
Pulse Width=5S (0.00002-3600S)
9. Start dynamic test and operate Left/Right key. Move to On and press
[Enter] key for confirmation.
TRANSITION
On Off
10. Enter the dynamic test mode.
Copyright © ITECH Electronics Co., Ltd.
30
Function and Features
10.0000V 0.0000A
0.00W 0 TRAN
11. Press [On/Off] key to open input and press [Trig] key (Triggering key)
The load will switch after receipt of every trigger signal. The load will
continuously switch between A and B value. Time of operations is shown at
bottom right.
12. Press CC/CV/CR/CW key or any composite function key to exit dynamic
test function. Repeat Steps 1-11 to continue parameter setting and
operation of dynamic test.
----End
3.9.3 Toggle mode
Under toggle mode, after enabling dynamic test operation, the load will be
switched continuously between A value and B value after receipt of every
trigger signal.
10A
5A
TRG
TRG
Toggled Transient Operation
Taking CC mode as example (operations under other modes are similar), when
output voltage and current of the tested instrument are 10V and 3A respectively,
the load current will switch from 1A and 2A. Set the dynamic test parameters
and perform the test as follows:
1.
Press [Tran] key. Operate Left/Right key. Move to On and press [Enter] for
confirmation.
TRANSITION
2.
On
Off
Select Continuous. Press [Enter] key (The Trig lamp that indicates VFD
screen status is on).
TRANSITION
3.
Continuous Pulse Toggle
Operate Left/Right key and select high range and low range. Move to the
High-Rate and press [Enter] key.
TRANSITION
4.
High-Rate Low-Rate
Set ascending slope and press [Enter] key.
TRANSITION
Rise up=2.000A/uS
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Function and Features
5.
Set descending slope and press [Enter] key for confirmation.
TRANSITION
6.
Rise down=2.000A/uS
Set A value and press [Enter] key for confirmation.
TRANSITION
7.
Level A=1A
Set B value and press [Enter] key for confirmation.
TRANSITION
8.
Level B=2A
Start dynamic test and operate Left/Right key. Move to On and press
[Enter] key for confirmation.
TRANSITION
9.
On Off
Enter the dynamic test mode.
10.0000V
0.0000A
0.00W 0 TRAN
10. Press [On/Off] key to open input and press [Trig] key (Triggering key).
The load will switch after receipt of every trigger signal. The load will switch
between A and B value for one time. Time of operations is shown at bottom
right.
11. Press CC/CV/CR/CW key or any composite function key to exit dynamic
test function. Repeat Steps 1-10 to continue parameter setting and
operation of dynamic test.
----End
3.10 OCP test function
OCP
TEST
The IT8800 series electronic load is provided with over-current protection test
function (OCP). Under OCP test mode, when input voltage reached Von value,
delay for a while for the electronic load to latch. Ascend value by step value at
regular interval. At the same time, check the load input voltage and judge
whether it is higher than standard voltage value. If higher, it indicates that OCP
does not occur. Repeat current stepping operation till the load operates to the
cutoff current; if lower, it indicates that OCP does occur. Check whether the
existing current value is within target scope again. If yes, PASS the test.
Press [Shift] + [CC] (OCP) keys to enter OCP test function setting screen.
OCP TEST
Run
Operate OCP test documents
OCP TEST
Recall
Recall OCP File=1
Recall OCP test documents (1-5)
OCP TEST
1:Voltage on level=0.000V
Set Von voltage value
2:Voltage on Delay=0.00S
Set Von voltage delay time
Edit
3:Current Range=0.000A
Set working current range
4:Start Current=0.000A
Set initial current value
5:Step Current=0.000A
Set step current value
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Function and Features
6:Step Delay=0.00S
Set step delay time
7:End Current=0.000A
Set cutoff current value
8:OCP Voltage=0.000V
Set OCP value
9:Max Trip Current=0.000A
Set
over-current
(maximum value)
range
10:Min Trip Current=0.000A
Set
over-current
(minimum value)
range
Save OCP File=1 (1-5)
Save OCP test documents
Operating steps:
1. Press [Trig] key to start OCP test. If within range, PASS the test and the
board will display as follows:
9.9973V
0.0005A
0.01W 5.100A PASS STOP
If not, there is FAULT and the board will display as follows:
9.9973V
0.0005A
0.01W 5.100A FAULT STOP
2.
End test. The User should return back to setting screen for resetting.
NOTE
If the set OCP voltage value is higher than the power voltage value, the OCP will fail to
operate and the board will display as follows:
9.9990V
0.0009A
0.01W
0.100A
FAULT
STOP
----End
3.11 OPP test function
OPP
TEST
The IT8800 series electronic load is provided with overpower protection test
function (OPP). Under OPP test mode, when input voltage reached Von value,
delay for a while for the electronic load to latch. Ascend value by step value at
regular interval. At the same time, check the load input voltage and judge
whether it is higher than standard voltage value. If higher, it indicates that OPP
does not occur. Repeat power stepping operation till the load operates to the
cutoff power; if lower, it indicates that OPP does occur. Check whether the
existing power value is within target scope again. If yes, PASS the test.
Press [Shift] + [CW] (OPP) keys to enter OPP test function setting screen.
OPP TEST
Run
Operate OPP test documents
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Function and Features
OPP TEST
Recall
Recall OPP File=1
Recall OPP test documents (1-5)
OPP TEST
Edit
1:Voltage on level=0.000V
Set Von voltage value
2:Voltage on Delay=0.00S
Set Von voltage delay time
3:Current Range=0.000A
Set working current range
4:Start Power=0.000W
Set initial power value
5:Step Power=0.000W
Set step power value
6:Step Delay=0.00S
Set step delay time
7:End Power=0.000A
Set cutoff power value
8:OPP Voltage=0.000V
Set OPP value
9:Max Trip Power =0.000W
Set overpower range (maximum
value)
10:Min Trip Power =0.000W
Set overpower range (minimum
value)
Save OPP File=1 (1-5)
Save OPP test documents
Operating steps:
1. Press [Trig] key to start OPP test. If within range, PASS the test and the
board will display as follows:
9.996V
0.0007A
0.01W 49.10W PASS STOP
If not, there is FAULT and the board will display as follows:
9.996V
0.0007A
0.01W 48.6W FAULT STOP
2.
End test. The User should return back to setting screen for resetting.
NOTE
If the set OPP voltage value is higher than the power voltage value, the OPP will fail to
operate and the board will display as follows:
9.996V
0.01W
0.1W
0.0007A
FAULT STOP
----End
3.12 Battery discharge test function
In the IT8800 series electronic load, constant current mode is applied for
capacity test with programmatic setting of cutoff level/capacity/discharging time
If cutoff level is set as the stop condition, the system determines whether the
battery is about to reach the set threshold value or unsafe status when the
Copyright © ITECH Electronics Co., Ltd.
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Function and Features
STOP
CONDITION
battery voltage is low, and if yes, an automatic stop will be activated. During the
test, the voltage, time and discharged capacity of the battery can be observed.
Battery discharge test is a necessary step before battery replacement for it can
reflect reliability and remaining life of battery.
Enter [Shift] + 3 to enter function testing screen of battery discharge test.
STOP Condition
Voltage
Stop Voltage
Set cutoff voltage
STOP Condition
Capability
Stop Capability
Set battery cutoff capacity
STOP Condition
Timer
Stop Timer
Set discharge time
Operation method:
1.
2.
3.
4.
Press [On/Off] key to cut off load input status. Connect the battery to be
tested. Under CC mode, press [Shift] + 3 keys to enter battery discharge
function menu and select one of the three methods for test based on actual
requirements.
Set discharge stopping conditions:
 Type I: Press [Shift] + 3 keys and select Capability. Press [Enter] key
and the VFD displays Cutoff Capability =Ah. Set battery stop capacity.
Press [Enter] key for confirmation. When set battery capacity is
reached, the load input status will automatically be OFF.
 Type II: Press [Shift] + 3 keys and select Voltage. Press [Enter] key
and the VFD displays Stop Voltage=V. Set cutoff voltage and press
[Enter] key to start discharge test. When the battery voltage drops to
cutoff voltage, the load input status will automatically be OFF.
 Type III: Press [Shift] + 3 key and select Timer. Press [Enter] key and
the VFD displays Stop Timer=S. Set discharge time. When the set stop
time is reached, the load input status will automatically be OFF.
Press [Trig] key to start testing. The board will display discharge voltage,
current discharge time and capacity (AH).
Press [Esc] key to exit battery capacity test mode in any three methods.
----End
3.13 CR-LED test function
With adding of diode break-over voltage setting in the IT8800 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.
The I-V curve of LED is as shown below. Under conventional CR mode, the
electronic load only simulates the static working point of diode as shown in the
red circle of the following figure. It is unable to verify the dynamic characteristics
of LED under normal working conditions, and the status of accurate ripple
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Function and Features
current.
Setting CR-LED Mode
Example: LED driver specification
The output current is 200mA and the range of output voltage is from 45V to
62V.
Operating steps:
1.
Start CR-LED function.
1) Press [Shift] + 6 keys to enter configuration menu.
2) Press Right Key and select “CR-LED”. Press [Enter] key for entry.
Select “on” and press [Enter] key.
3) Press [Esc] key to exit.
2. Set CR mode and Vd value
For example, the output voltage of LED driver is 50V, verify that whether
the output current of LED is rated current 200mA.
1) Press [CR] key and set corresponding constant resistance. (Set
CR=50Ω)
2) Press [Shift] + [CV] keys for a series of related setting: range=7500.0,
high=130V, low=0V, which may remain the original values. Vd will be
set based on the calculation below. (Set Vd=40V)
3) Press the [Enter] key to save the settings.
3. Press [On/Off] key to turn on load input.
Calculation method of Vd and R:
Definition:
 Vo: constant working voltage of load LED of LED constant current source;
 Io: output current of LED constant current source;
 Vd: break-over voltage of diode (string);
 R: constant resistance.
V-I curve of LED is as shown below.
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Function and Features
According to four parameters above and the V-I curve of LED, you can
calculate the value of R and Vd.
R 
V2  V1
I 2  I1
Vd  Vo  I 0  R 
NOTE
The value of V2, V1, I2 and I1 should be close to the static working point of LED as
shown in the red circle above.
Or you can roughly calculate the value of R and Vd with the following equation.
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.
In the example: Vd=50V*0.8=40V R=(0.2*50V)/0.2A=50Ω.
----End
3.14 Measurement of voltage rise time
The IT8800 series electronic load is provided with special voltage 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] + 6 keys to enter configuration menu. Press Right key. Select
“Measure” and press [Enter] key.
2. Press Left/Right Key to select “TimeV1”. Press [Enter] key. Press numeric
keys to set initial voltage value and press [Enter] key.
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Function and Features
Press Left/Right Key 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
5. Press [Shift] + 5 keys to enter system menu. Press Right key till “Displ”
flicks and press [Enter] key.
6. Press Left/Right 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.
3.
OFF CC
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.
----End
3.15 Configuration save function
The electronic load can save some commonly-used parameters in 100-group
(0-99) NVM for convenient and fast usage. Saving parameters comprise
working mode, voltage, current, etc. The Save key can be used for saving
parameters. The RECALL key is for quick invoking.
Operation steps
If the operator needs to save configured parameter values for direct recall in
follow-up operation, refer to the steps below:
e.g., power supply 6V and 3A. The electronic load works under constant current
(CC) 1A. Save "CC 1A" in register 9 for recall.
 SAVE
1. Set parameters and press [Shift] + 4 (Save) to save data. Press 9 key (to
select in which group the data is to be saved).
5.8949V
5.89W
2.
0.99994A
SAVE 9
Press [Enter] key for confirmation.
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Function and Features
5.8949V
5.89W

1.
0.99994A
cc=1.000A
RECALL
Press [Recall] key and press 9 (to select from which group the data is
recalled).
5.8949V
5.89W
----End
0.99994A
cc=1.000A
Memory function
When you want to recall the data saved in the memory, you should set memory
group in the system menu first.
Group 0 means you can recall data saved in 0-10 groups. Group 1 means you
can recall data saved in 11-20 groups. Group2-Group 9 can be concluded in the
same manner.
3.16 VON function
When testing some power products with slow voltage rise speed, if the
electronic load input is opened before power, the power may latch protection. In
this way, the user may set VON value. The electronic load only latches when
power voltage is higher than this value.
Press [Shift]+ 9 keys to enter configuration menu. Set voltage value in Voltage
on under configuration menu to control on/off status of electronic load. When
VON LATCH function is started, it indicates that Von Point latches load status.
NOTE
Please confirm whether it is necessary to set loading voltage, a step that provides
convenience for limiting working voltage value. If not necessary, do not set the loading
voltage without authorization to prevent unnecessary trouble from failure of loading.
If the instrument cannot load, please firstly check whether the VON function is set. If yes,
reset the Von value to minimum value (which may be directly set as 0. If minimum voltage
value of instrument is not 0, press 0 for confirmation and the menu will automatically set
the value as minimum value).
This function is invalid under CV mode.
When VON LATCH function is started, the load starts load test only when the
power voltage rises and is higher than Von Point loading voltage. When the
power voltage drops and is lower than Von Point unloading voltage, the load will
not unload.
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Function and Features
Load working range when VON LATCH is started
3.17. Protective function
The load is provided with following protective functions: overvoltage protection
(OVP), over-current protection (OCP), over-power protection (OPP),
over-temperature protection (OTP) and input reverse polarity protection
(LRV/RRV).
If any one of the above protections is enabled, the load will have corresponding
actions. Press any key on the front board to reset protection functions. For
example, in case of over-temperature protection, the load will give alarm and
the input will automatically switch to OFF status. The load VFD will display OTP.
3.17.1 Over-voltage protection (OVP)
The load will be immediately OFF and the buzzer will sound if the overvoltage
circuit is triggered. OV and VF bits of the status register will be set and OVP will
be displayed on the screen of the load till resetting. In case of overvoltage
protection, the VF pin of the 8-pin connector on rear board of the load outputs
TTL high level and the VF pin can be used for controlling output status of the
power to be tested.
Clear overvoltage protection status:
Inspect whether voltage of object under test is within load rated voltage or set
protection voltage range. If not, disconnect the object. Press any key on front
board (or send command to PROTection:CLEar), the load front board (OVP)
word will get cleared and the load will exit OVP protection status.
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Function and Features
3.17.2 Over-current protection (OCP)
The electronic load is provided with two kinds of over-current protections:
hardware over-current protection and software over-current protection.
 Hardware over-current protection: maximum load current of the electronic
load is limited within about 110% of the existing current range by hardware.
When the hardware triggers over-current protection, OC bit of the status
register will be set; when such protection is removed, the OC bit will be
reset. The existing On/Off status of load will not be changed by the
hardware over-current protection.
 Software over-current protection: the user can set load software
over-current protection value following steps: press [Shift]+ 5 key >Protect>
A-limit (set as ON). A point is set as OCP current value and A delay set as
pre-alarm delay time. When software over-current protection function is on,
if the loading current value exceeds delay of such over-current protection
set value, the load will automatically be OFF and the VFD will display OCP.
At the same time, OC and PS bits of the status register will be set and keep
till reset.
Clear over-current protection status:
Inspect whether current of object under test is within load rated current or set
protection current range. If not, disconnect the object. Press any key on front
board (or send command to PROTection:CLEar), the load front board (OCP)
word will get cleared and the load will exit OCP protection status.
3.17.3 Over-power protection (OPP)
The electronic load is provided with two kinds of overpower protections:
hardware over-power protection and software overpower protection.
 Hardware over-power protection: the user can set load hardware
overpower protection. Load overpower will be limited to existing power
value. The existing On/Off status of load will not be changed by the
hardware overpower protection.
 Software overpower protection: the user can set load software overpower
protection value following steps: [Shift] + 5 >Protect>Point Set power
value. P-limit is set as pre-alarm delay time. If the loading power value
exceeds delay of such overpower protection set value, the load will
automatically be OFF and the VFD will display OPP. At the same time, OP
and PS bits of the status register will be set and keep till reset.
Clear overpower protection status
Inspect whether power of object under test is within load rated power or set
protection power range. If not, disconnect the object. Press any key on load
front board (or send command to PROTection:CLEar), the load front board
(OPP) word will get cleared and the load will exit OPP protection status.
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Function and Features
3.17.4 Over-temperature protection (OTP)
When internal power device of load is higher than about 85 °C, the load is
under temperature protection. At this time, the load will automatically be OFF
and VFD will display OTP. At the same time, OT and PS bits of the status
register will be set and keep till reset.
Clear over-temperature protection
When load temperature is decreased to protection point, press any key on front
board (or send command to PROTection:CLEar), the load front board (OTP)
word will get cleared and the load will exit OTP protection status.
3.17.5 Input reverse polarity protection (LRV)
The load will be immediately OFF and the buzzer will sound in case of input
reverse polarity. The (LRV /RRV) and (VF) bits of status register will be set; and
(LRV/RRV) will be displayed on the screen. VF will keep till resetting.
In case of reverse polarity, VF pin outputs a high level.
Clear reverse polarity protection:
Check whether the load has reverse polarity. If yes, disconnect the connecting
object for reconnection.
3.18 List operation (LIST)
LIST mode provides an accurate, fast and low-cost way to complete any
complicated current change mode, which enables synchronization of internal or
external signals in multiple quasi-bit load precision tests.
When different trigger sources are selected, the LIST function will form a variety
of complex sequences by editing step value, pulse width and slope of each step
to meet complicated test requirements. LIST parameters comprise designation
of input list file, input step count (2-84 steps at maximum), step time (0.00002 s
– 3600 s) as well as setting value and slope of each step. The list file can be
stored in non-volatile RAM available for a quick output in case of usage. The
user can edit 7 groups of list files at maximum.
If the load operation mode is at List operation, the load will start List operation,
when it receives a trigger signal till completion or receipt of another trigger
signal. Before List operation, be sure to edit List operation files and save them
in load non-volatile RAM. Refer to examples below to know how to execute List
operation through board. It is assumed that output voltage and current of the
tested instrument are 10V and 3A respectively and the load is under CC mode.
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Function and Features
Trigger
0
1
2
3 4
5
List count=1
List count=2
List sequence
Edit the LIST file and trigger to operate this file. Operation steps:
Operation steps
1.
Press [List] key. Operate Left/Right key. Move to Edit and press [Enter]
key.
LIST
2.
On
Recall
Edit
Operate Left/Right key and move to the High-Rate and press [Enter] key.
EDIT
3.
High-Rate Low-Rate
Set CC range and press [Enter] key.
EDIT
4.
LIST
Step 001
Width=5S
Edit current value in step 2And press [Enter] key for confirmation.
EDIT
9.
LIST
Step 001
Rate=0.1A/uS
Edit time in step 1And press [Enter] key for confirmation.
EDIT
8.
LIST
Step 001
Level=1A
Edit slope in step 1And press [Enter] key for confirmation.
EDIT
7.
LIST
File Step=2 (2-84)
Edit current value in step 1And press [Enter] key for confirmation.
EDIT
6.
LIST
Current
Range=3A
Edit number of steps. Press 2 key to edit two steps. Press [Enter] key for
confirmation.
EDIT
5.
LIST
LIST
Step 002
Level=2A
Edit slope in step 2And press [Enter] key for confirmation.
EDIT
LIST
Step 002
Rate=0.1A/uS
10. Edit time in step 2And press [Enter] key for confirmation.
EDIT
LIST
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Function and Features
Step 002
Width=5S
11. Edit repeat count and press [Enter] key for confirmation.
EDIT
LIST
Repeat Count=3
12. Save all edited files and press [Enter] key for confirmation.
EDIT
LIST
Save List File=1(1-9)
13. Operate Left/Right key and move to On. Press [Enter] key (The Trig lamp
that indicates VFD screen status is on). Press [Esc] key to exit setting.
LIST
On
Recall
Edit
List operation running
15. Press CC/CV/CR/CW key or any composite function key to exit List test
function.
----End
For direct recall of existing List files and triggering of List operation, refer to
steps below:
Operation steps
1.
Press [List] key and ensure that ON lamp flicks. If not, press [Enter]
before operating Left/Right key. Move to [Recall] and press [Enter] key.
LIST
2.
3.
On
Recall
Edit
Select edited files and press [Enter] for confirmation.
Recall List File=1
Operate Left/Right key and move to On. Press [Enter] key (The Trig lamp
that indicates VFD screen status is on). Press [Esc] key to exit setting.
LIST
On
Recall
Edit
4. Press [On/Off] key to open input and press [Trig] key (Triggering key)
List operation running.
----End
3.19 Terminal function of rear board
Terminals on IT8800 rear board comprise remote sensor terminal, external
trigger terminal, external analog control terminal, voltage fault indication
terminal, external On/Off control terminal and current monitoring terminal.
Terminal schematic (as shown below):
Copyright © ITECH Electronics Co., Ltd.
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Function and Features
Pin
Sense+, SenseEXT PRG+, EXT PRGTRIG
ON
VF
Pin function
Remote sense terminal
External analog control terminal
Negative input terminal for TRIG, ON and VF
Positive input terminal for trigger
Positive input terminal for external On/Off control
Positive input terminal for voltage fault indication
3.19.1 Remote sense compensation functions
Under CC, CV, CR or CW mode, if the load consumes large current, a large
voltage drop will be detected in connection line between tested instrument and
load terminal. To ensure measurement accuracy, a remote sense measurement
terminal is provided at load rear board to compensate voltage drop lost in wire.
Remote sense operation: SENSE (+) and SENSE (-) are remote input
terminals. To avoid voltage drop caused by long input wire of load, the remote
sense allows direct measurement at input terminal source so as to improve
measurement accuracy.
Before using the remote sense measurement function, the user must set the
load in remote sense measurement mode.
Setting procedures:
Press [Shift] + 6 to enter menu. Move Left/Right key and select Remote-Sense.
Press [Enter] key and select ON to start Sense function.
Wiring Diagram of Remote Sense
3.19.2 External trigger operation
When rear board triggering mode is selected, firstly, set the trigger source as
External and the triggering signal is input from the rear board TRIG terminal.
Set the triggering sources as follows:
Press [Shift]+ 5 keys to enter system menu. Click Right key till Trigger appears
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Function and Features
and flicks. Press [Enter] to entry and press
to select External. Press
[Enter] for confirmation. Press [Esc] to exit the menu.
When external trigger is selected, the positive and negative TRIG terminals will
generate trigger signal and the low pulse is valid.
Input corresponding to one trigger can be used for triggering dynamic test, LIST
test and auto test.
3.19.3 External analog quantity test
Loading voltage or current of the electronic load can be controlled by EXT PRG
(positive and negative) analog quantity terminals on rear board. Connect 0-10V
adjustable voltage at the EXT PRG terminal to analog input from 0- full range
so as to adjust input voltage and current of load (10V corresponds to voltage or
current of load at full range).
3.19.4 External On/Off Control
The load input switches can be controlled by the external TTL electrical level.
During external input control, the
key will become invalid and the load
input switches can only be controlled by the external TTL electrical level. The
load input will be switched on in case of low level external input; and the load
input will be switched off in case of high level external input.
3.19.5 Voltage fault indication terminal
When load is under overvoltage protection or terminal reverse polarity
protection, VF pin voltage fault indication terminal outputs high level.
3.19.6 Current monitoring (I Monitor)
The 0-10V analog quantity output signal of current monitoring output terminal
represents input current to which the terminal belongs from 0 to full range. An
external voltmeter or oscilloscope can be connected to display input current
change.
3.20 Auto test function
The IT8800 series electronic load delivers strong auto test functions, which can
analog several tests. A total of 10 groups of test files can be edited, and each
group test file has 10 steps. Therefore, a maximum of 100 steps can be edited
and saved in EEPROM (address).
Edit test files following the steps below:
Copyright © ITECH Electronics Co., Ltd.
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Function and Features
NOTE
In the following editing procedures, “Y” indicates selected status. To cancel selected status,
press numeric key of corresponding step again.
Operation steps
1.
Press [Shift] + 2 (Program).
PROGRAM
2.
Run
Recall
Edit
Operate Left/Right key and move to Edit. Press [Enter] key to enter editing
test files.
EDIT
3.
Active Sequence=0987654321
Press numeric key to select required testing steps. The Active Sequence
=09876543YY indicates that 1/2 steps have been selected. Press [Enter]
key for confirmation.
EDIT
4.
PROGRAM
SEQ01 Off Time=2S
Set test delay time of step 1. If 1S is required, directly press 1 key. Press
[Enter] key for confirmation. Tpf is delay time before measurement.
EDIT
9.
PROGRAM
SEQ01 On Time=2S
Set unloading time of step 1. If 2S is required, directly press 2 key. Press
[Enter] key for confirmation.
EDIT
8.
PROGRAM
Short
Sequence=□□□□□□□□2Y
Set loading time of step 1. If 2S is required, directly press 2 key on the
board. Press [Enter] key for confirmation.
EDIT
7.
PROGRAM
Pause Sequence=□□□□□□□□Y1
Select whether short-circuit test is necessary for these two steps. If step 1
is to be tested, press 1 key. If not, directly press [Enter] key for
confirmation.
EDIT
6.
PROGRAM
Active Sequence=09876543YY
Select whether pause is necessary for these two steps. If step 2 is to be
paused, press 2 key. If not, directly press [Enter] key for confirmation.
EDIT
5.
PROGRAM
PROGRAM
SEQ01 P/F Delay Time=1S
Set loading time of step 2. If 2S is required, directly press 2 key on the
board. Press [Enter] key.
EDIT PROGRAM
SEQ02 On Time=2S
10. Set unloading time of step 2. If 2S is required, directly press 2 key. Press
[Enter] key.
EDIT
PROGRAM
SEQ02 Off Time=2S
Copyright © ITECH Electronics Co., Ltd.
47
Function and Features
11. Set test delay time of step 2. If 1S is required, directly press 1 key. Press
[Enter] key. Tpf is delay time before measurement.
EDIT
PROGRAM
SEQ02 P/F Delay Time=1S
Tpf is delay time before measurement.
12. Set conditions for stop test. COMPLETE means to stop after all tests are
completed and FAILURE means to stop in case of test error. Press [Enter]
key for confirmation.
PROGRAM
Complete-Stop Failure-Stop
13. Determine whether to link to next group of test file. If it is to link to second
group, press 2 . 0 means not to link to other test files. Press [Enter] key for
confirmation.
PROGRAM
Chain Program File=0 (0-10)
Correspondence Table of Auto Test Files and Step Parameter Saving
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
14. Save the programmed files in EEPROM. A total of 10 groups of files can be
saved. If it is to save edited files in group 1, press 1 key. Press [Enter] key
for confirmation.
PROGRAM
Save Program File=1 (1-10)
Copyright © ITECH Electronics Co., Ltd.
48
Function and Features
15. Press ESC key to exit editing menu.
The above steps only set entire framework of auto tests. Additional
setting is required for specific parameters in each step. This design will
facilitate modification of parameters in a single step.
16. Select required working mode. Set working
voltage/current/power/resistance. Press [Shift] + [CV] to enter parameter
setting.
10.0000V
0.0000A
0.00W
CC=1.000A
17. It is assumed that step 1 edits CC mode as follows: current: 2A, maximum
voltage value: 10V, and minimum voltage value: 2V; and step 2 edits CV
mode as follows: voltage: 3V, maximum current value: 5A, and minimum
current value: 0A. After parameter setting in each step, press [Esc] to exit
menu setting. And press [Shift] + 4 for saving. Setting at each step should
be saved. The saving position is same as that of step number. Settings at
each step should be independently saved. Refer to the
“Correspondence Table for Auto Test Files and Single-Step Parameter
Saving Positions”.
18. It is necessary to recall test files for running after editing auto test files.
----End
Recall test file for running
To recall edited test files from EEPROM quickly after re-energizing instrument,
refer to the method below.
1.
Press [Shift] + 2.
PROGRAM
2.
Run
Recall
Edit
Move Left/Right Key and select [Recall] key. Press [Enter] key for
confirmation.
RECALL PROGRAM
3.
Recall Program File=1
Move Left/Right Key and select Run. Press [Enter] key for confirmation.
PROGRAM
Run
Recall
Edit
4. Display auto test file 1.
PRG01 STOP
5. Press [Trig] key.
Operate auto test file 1. Press [Pause] key on board to pause auto test.
Press Move key for next step.
----End
Copyright © ITECH Electronics Co., Ltd.
49
Technical Specifications
Chapter4 Technical Specifications
4.1 Major technical parameters
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
Range
current
Resolution
Constant
resistance
mode *1
0~120V
0~500V
0~60A
0.1V/6A
1.0V/60A
0.36V3A
3.6V/30A
0.1~18V
0.1~120V
0.1~50V
0.1~500V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
0~6A
0~60A
0.1mA
0~3A
1mA
0~30A
0.1mA
1mA
±(0.05%+0.05%FS)
10Ω~7.5KΩ
0.02Ω~10Ω
Resolution
Accuracy
0~30A
750W
Accuracy
Range
0~3A
750W
Accuracy
Constant
mode
IT8813B
0~6A
Input power
Min. operating
IT8813
16bit
0.01%+0.08S *2
10Ω~7.5KΩ
0.15Ω~10Ω
16bit
0.01%+0.0008S
0.01%+0.08S
0.01%+0.0008S
*2
Constant
Range
750W
750W
power
Resolution
10mW
10mW
0.2%+0.2%FS
0.2%+0.2%FS
Mode *3
Accuracy
Dynamic mode
CC mode
T1&T2
20uS~3600S /Res:1 uS
20uS~3600S /Res:1 uS
5uS±100ppm
5uS±100ppm
Accuracy
Ascending/descending
slope*4
Minimum rise time *5
0.0001~0.25A/uS
0.001~2.5A/uS
0.0001~0.1A/uS
0.001~1A/uS
≒20uS
≒20uS
≒20uS
≒20uS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~18V
0~120V
0~50V
0~500V
Resolution
1 mV
10 mV
1 mV
10 mV
Accuracy
Range
Resolution
Accuracy
±(0.025%+0.025%FS)
0~6A
0~60A
0.1mA
1mA
0~3A
0~30A
0.1mA
1mA
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
Range
750W
750W
Resolution
10mW
10mW
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower protection
≒760W
Copyright © ITECH Electronics Co., Ltd.
≒760W
50
Technical Specifications
Overcurrent protection
≒6.6A
≒66A
Overvoltage protection
Overtemperature
protection
≒3.3A
≒33A
≒130V
≒530V
≒85℃
≒85℃
Specification
Short circuit
Current (CC)
≒6.6A
66A
≒3.3/3A
≒33/30A
Voltage (CV)
0V
0V
0V
0V
≒15mΩ
≒15mΩ
≒120mΩ
≒120mΩ
Resistance
(CR)
1MΩ
Input
300KΩ
terminal
impedance
Dimension
W439*H133.3*D580(mm)
Weight
7.05KG
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
IT8814
IT8814B
0~120V
0~500V
0~12A
0~120A
Input power
Min. operating
7.05KG
1500W
0.12V at 12A
1.2V at 120A
0.36V at 6A
3.6V at 60A
0.1~18V
0.1~120V
0.1~50V
0.1~500V
1mV
10mV
1mV
10mV
0~6A
0~60A
Accuracy
±(0.025%+0.05%FS)
Range
0~12A
0~120A
current
Resolution
1mA
10mA
Constant
resistance
mode *1
Accuracy
Range
0.1mA
1mA
±(0.05%+0.05%FS)
10Ω~7.5KΩ
0.01Ω~10Ω
Resolution
Accuracy
0~60A
1200W
Constant
mode
0~6A
16bit
0.01%+0.08S *2
10Ω~7.5KΩ
0.1Ω~10Ω
16bit
0.01%+0.0008S
0.01%+0.08S
*2
0.01%+0.0008S
Constant
Range
1500W
1200W
power
Resolution
100mW
100mW
0.2%+0.2%FS
0.2%+0.2%FS
Mode *3
Accuracy
Dynamic mode
CC mode
T1&T2
20uS~3600S /Res:1 uS
20uS~3600S /Res:1 uS
5uS±100ppm
5uS±100ppm
Accuracy
Ascending/descending
slope*4
Minimum rise time *5
0.001~0.25A/uS
0.01~2.5A/uS
0.0001~0.1A/uS
0.001~1A/uS
≒30uS
≒30uS
≒20uS
≒20uS
Measuring range
Copyright © ITECH Electronics Co., Ltd.
51
Technical Specifications
Read-back
voltage
Range
0~18V
0~120V
0~50V
0~500V
Resolution
1 mV
10 mV
1 mV
10 mV
Accuracy
Read-back
current
Range
0~12A
0~120A
Resolution
1mA
10mA
Accuracy
Read-back
power
±(0.025%+0.025%FS)
0~6A
0~60A
0.1mA
1mA
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
Range
1500W
1200W
Resolution
100mW
100mW
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Accuracy
Protection range
≒1550W
Overpower protection
Overcurrent protection
≒13.2A
≒1250W
≒132A
≒6.6A
≒66A
Overvoltage protection
≒130V
≒530V
Overtemperature protection
≒85℃
≒85℃
Specification
Short circuit
Current (CC)
≒13.2A
132A
≒6.6/6A
≒66/60A
Voltage (CV)
0V
0V
0V
0V
≒10mΩ
≒10mΩ
≒60mΩ
≒60mΩ
Resistance
(CR)
1MΩ
Input
300KΩ
terminal
impedance
W439*H133.3*D580(mm)
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
IT8816B
0~120V
0~500V
0~24A
0~240A
Input power
Min. operating
IT8816
0~10A
3000W
0~100A
2.5KW
0.12V/24A
1.2V/240A
0.3V/10A
3V/100A
0.1~18V
0.1~120V
0.1~50V
0.1~500V
1mV
10mV
1mV
10mV
Accuracy
±(0.025%+0.05%FS)
Constant
Range
0~24A
0~240A
0~10A
0~100A
current
Resolution
1mA
10mA
1mA
10mA
0.03Ω~10Ω
10Ω~7.5KΩ
mode
Constant
resistance
mode *1
Accuracy
Range
Resolution
Accuracy
±(0.05%+0.05%FS)
10Ω~7.5KΩ
0.01Ω~10Ω
16bit
0.01%+0.08S *2
0.01%+0.0008S
16bit
0.01%+0.08S
*2
0.01%+0.0008S
Constant
Range
3000W
2.5KW
power
Resolution
100mW
100mW
0.2%+0.2%FS
0.2%+0.2%FS
Mode *3
Accuracy
Copyright © ITECH Electronics Co., Ltd.
52
Technical Specifications
Dynamic mode
CC mode
T1&T2
20uS~3600S /Res:1 uS
20uS~3600S /Res:1 uS
5uS±100ppm
5uS±100ppm
Accuracy
Ascending/descending
slope*4
0.001~0.25A/uS
0.01~2.5A/uS *
0.001~0.1A/uS
0.01~1A/uS *
≒60uS
≒60uS
≒80uS
≒80uS
Minimum rise time *5
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~18V
0~120V
0~50V
0~500V
Resolution
0.1 mV
1 mV
1 mV
10 mV
Accuracy
±(0.025%+0.025%FS)
Range
0~24A
0~240A
0~10A
0~100A
Resolution
1mA
10mA
1mA
10mA
Accuracy
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
Range
3000W
2.5KW
Resolution
100mW
100mW
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒2550W
≒3050W
protection
Overcurrent
≒26.4A
protection
Overvoltage
protection
≒264A
≒11A
≒110A
≒130V
≒530V
≒85℃
≒85℃
Overtemper
ature
protection
Specification
Short circuit
Current (CC)
≒26.4A
≒264A
≒11A
≒110A
Voltage (CV)
0V
0V
0V
0V
≒5mΩ
≒5mΩ
≒30mΩ
≒30mΩ
Resistance
(CR)
1MΩ
Input
300KΩ
terminal
impedance
W439*H133.3*D580(mm)
Dimension
Model
IT8813C
0~120V
Input voltage
Rated value
( 0-40 °C)
Input current
0~12A
750W
Input power
Min. operating
voltage
0~120A
0.12V/12A
Copyright © ITECH Electronics Co., Ltd.
1.2V/120A
53
Technical Specifications
Constant
Range
voltage
Resolution
mode
Accuracy
0.1~18V
0.1~120V
1mV
10mV
±(0.025%+0.05%FS)
±(0.025%+0.05%FS)
Constant
Range
0~12A
0~120A
current
Resolution
1mA
10mA
±(0.05%+0.1%FS)
±(0.05%+0.1%FS)
0.02Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Range
Constant
resistance mode Resolution
*1
Accuracy
Constant power
Mode *3
16 bit
0.01%+0.08S *2
0.01%+0.0008S
750W
Range
100mW
Resolution
0.2%+0.2%FS
Accuracy
Dynamic mode
CC mode
20uS~3600S /Res:1 uS
T1&T2
5uS±100ppm
Accuracy
Ascending/descending slope *4
0.001~0.25A/uS
0.01~2.5A/uS *
≒30uS
≒30uS
Minimum rise time *5
Measuring range
Read-back
voltage
Range
0~18V
0~120V
Resolution
1 mV
10 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~12A
0~120A
Resolution
1mA
10mA
Accuracy
Read-back
current
±(0.05%+0.1%FS)
Accuracy
Read-back
power
Range
750W
Resolution
10mW
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒760W
protection
Overcurrent
≒13.2A
protection
≒132A
Overvoltage
≒130V
protection
Overtemperatur
≒85℃
e protection
Specification
Short circuit
Current (CC)
≒13.2A
132A
Voltage (CV)
0V
0V
≒10mΩ
≒10mΩ
Resistance (CR)
Input
terminal
impedance
Dimension
300KΩ
W439*H133.3*D580(mm)
Copyright © ITECH Electronics Co., Ltd.
54
Technical Specifications
Model
IT8814C
Input voltage
Rated value
Input current
( 0-40 °C)
Input power
0~120V
0~24A
1500W
Min. operating voltage
Constant
Range
voltage
Resolution
mode
Accuracy
0~240A
0.15V/24A
1.5V/240A
0.1~18V
0.1~120V
1mV
10mV
±(0.025%+0.05%FS)
±(0.025%+0.05%FS)
Constant
Range
0~24A
0~240A
current
Resolution
1mA
10mA
±(0.05%+0.1%FS)
±(0.05%+0.1%FS)
0.01Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
1500W
power
Resolution
100mW
Mode *3
Resolution
Accuracy
16 bit
0.01%+0.08S *2
Accuracy
0.01%+0.0008S
0.2%+0.2%FS
Dynamic mode
CC mode
T1&T2
20uS~3600S /Res:1 uS
Accuracy
5uS±100ppm
Ascending/descending slope *4
0.0001~0.25A/uS
0.001~2.5A/uS *
≒60uS
≒60uS
Minimum rise time *5
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~18V
0~120V
Resolution
0.1 mV
1 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Accuracy
Range
0~24A
0~240A
Resolution
1mA
10mA
Accuracy
±(0.05%+0.05%FS)
Range
1500W
Resolution
100mW
Accuracy
±(0.2%+0.2%FS)
Protection range
Overpower
≒1550W
protection
Overcurrent
protection
Overvoltage
protection
≒26.4A
≒264A
≒130V
Overtempera
ture
≒85℃
protection
Copyright © ITECH Electronics Co., Ltd.
55
Technical Specifications
Specification
Current (CC)
Short circuit Voltage (CV)
Resistance (CR)
≒26.4A
264A
0V
0V
≒6mΩ
≒6mΩ
Input
300KΩ
terminal
impedance
W439*H133.3*D580(mm)
Dimension
Model
IT8816C
Input voltage
0~120V
Rated value
Input current
( 0-40 °C)
Input power
0~48A
0~480A
3000W
Min. operating voltage
0.2V/48A
2V/480A
Constant
Range
0.1~18V
0.1~120V
voltage
Resolution
1mV
10mV
±(0.025%+0.05%FS)
±(0.025%+0.05%FS)
mode
Accuracy
Constant
Range
0~48A
0~480A
current
Resolution
1mA
10mA
±(0.05%+0.1%FS)
±(0.05%+0.1%FS)
0.01Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
3000W
power
Resolution
100mW
Mode *3
Resolution
Accuracy
16bit
0.01%+0.08S *2
Accuracy
0.01%+0.0008S
0.2%+0.2%FS
Dynamic mode
CC mode
T1&T2
20uS~3600S /Res:1 uS
Accuracy
5uS±100ppm
Ascending/descending slope *4
Minimum rise time *5
0.001~0.25A/uS
0.01~2.5A/uS *
≒100uS
≒100uS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~18V
0~120V
Resolution
1 mV
10 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Accuracy
Range
0~48A
0~480A
Resolution
1mA
10mA
Accuracy
±(0.05%+0.1%FS)
Range
3000W
Resolution
100mW
Accuracy
±(0.2%+0.2%FS)
Protection range
Copyright © ITECH Electronics Co., Ltd.
56
Technical Specifications
Overpower
≒3050W
protection
Overcurrent
≒52.8A
protection
≒528A
Overvoltage
≒130V
protection
Overtemperat
≒85℃
ure protection
Specification
Current (CC)
≒52.8/48A
≒528/480A
0V
0V
≒4mΩ
≒4mΩ
Short circuit Voltage (CV)
Resistance (CR)
Input terminal
300KΩ
impedance
W439*H133.3*D580(mm)
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
IT8818
0~120V
0~120V
0~36A
0~360A
0~48A
0~480A
4500W
Input power
Min. operating
IT8817
6KW
0.15V/36A
1.5V/360A
0.15V/48A
1.5V/480A
0.1~18V
0.1~120V
0.1~18V
0.1~120V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
Accuracy
Constant
Range
0~36A
0~360A
0~48A
0~480A
current
Resolution
1mA
10mA
1mA
10mA
mode
±(0.05%+0.1%FS)
Accuracy
0.01Ω~10Ω
10Ω~7.5KΩ
0.005Ω~10Ω
10Ω~7.5KΩ
Constant
resistance
mode *1
Range
Constant
Range
4500W
6KW
power
Resolution
100mW
100mW
Mode *3
16bit
Resolution
Accuracy
0.01%+0.08S *2
16bit
0.01%+0.0008S
0.01%+0.08S *2 0.01%+0.0008S
0.2%+0.2%FS
Accuracy
Dynamic mode
CC mode
20uS~3600S /Res:1 uS
T1&T2
5uS±100ppm
Accuracy
Ascending/descending
slope *4
Minimum rise time *5
0.001~0.25A/uS
0.01~2.5A/uS
0.001~0.25A/uS
0.01~2.5A/uS
≒100 uS
≒100 uS
≒120 uS
≒120 uS
0~18V
0~120V
Measuring range
Read-back
Range
0~18V
0~120V
Copyright © ITECH Electronics Co., Ltd.
57
Technical Specifications
voltage
1 mV
Resolution
10 mV
current
Range
0~36A
0~360A
0~48A
0~480A
Resolution
1mA
10mA
1mA
10mA
±(0.05%+0.05%FS)
Accuracy
Read-back
power
1 0mV
±(0.025%+0.025%FS)
Accuracy
Read-back
1 mV
Range
4500W
6KW
Resolution
100mW
100mW
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒6050W
≒4550W
protection
Overcurrent
≒39.6A
protection
Overvoltage
protection
≒396A
≒52.8A
≒528A
≒130V
≒130V
≒85℃
≒85℃
Overtempera
ture
protection
Specification
Current (CC)
Short circuit
≒39.6A
≒396A
≒52.8A
≒528A
0V
Voltage (CV)
Resistance
≒4mΩ
(CR)
≒3mΩ
Input
300KΩ
terminal
impedance
W439*H266*D590(mm)
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
IT8818B
0~500V
0~500V
0~12A
0~120A
0~15A
3.6KW
Input power
Min. operating
IT8817B
0~150A
5KW
0.3V/12A
3V/120A
0.3V/15A
3V/150A
0.1~50V
0.1~500V
0.1~50V
0.1~500V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
Accuracy
Constant
Range
0~12A
0~120A
0~15A
0~150A
current
Resolution
1mA
10mA
1mA
10mA
mode
Constant
resistance
mode *1
±(0.05%+0.05%FS)
Accuracy
Range
Resolution
Accuracy
0.03Ω~10Ω
10Ω~7.5KΩ
16bit
0.01%+0.08S *2
0.01%+0.0008S
Copyright © ITECH Electronics Co., Ltd.
0.03Ω~10Ω
10Ω~7.5KΩ
16bit
0.01%+0.08S *2 0.01%+0.0008S
58
Technical Specifications
Constant
Range
3.6KW
5KW
power
Resolution
100mW
100mW
0.2%+0.2%FS
0.2%+0.2%FS
Mode *3
Accuracy
Dynamic mode
CC mode
20uS~3600S /Res:1uS
T1&T2
5uS±100ppm
Accuracy
Ascending/descending
slope *4
0.001~0.1A/uS
0.01~1A/uS
0.001~0.1A/uS
≒80uS
Minimum rise time *5
0.01~1A/uS
≒100 uS
Measuring range
Read-back
voltage
Range
0~50V
0~500V
0~50V
0~500V
Resolution
1 mV
10 mV
1 mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Read-back
current
Range
0~12A
0~120A
0~15A
0~150A
Resolution
1mA
10mA
1mA
10mA
±(0.05%+0.05%FS)
Accuracy
Read-back
power
Range
3.6KW
5KW
Resolution
100mW
100W
±(0.2%+0.2%FS)
Accuracy
Protection range
≒3650W
Overpower protection
Overcurrent protection
≒13.2A
Overvoltage protection
Overtemperature
protection
≒5050W
≒132A
≒16.5A
≒165A
≒530V
≒530V
≒85℃
≒85℃
Specification
Current (CC)
Short circuit
≒13.2A
≒132A
≒16.5A
≒165A
0V
Voltage (CV)
Resistance
≒25mΩ
(CR)
≒20mΩ
Input
1MΩ
terminal
impedance
W439*H266*D590(mm)
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
IT8818C
0~120V
0~120V
0~600A
0~600A
0~72A
4500W
Input power
Min. operating
IT8817C
0~720A
6KW
0.18V/60A
1.8V/600A
0.18V/72A
1.8V/720A
0.1~18V
0.1~120V
0.1~18V
0.1~120V
Copyright © ITECH Electronics Co., Ltd.
59
Technical Specifications
voltage
mode
Resolution
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
Accuracy
Constant
Range
0~60A
0~600A
0~72A
0~720A
current
Resolution
1mA
10mA
1mA
10mA
mode
±(0.1 %+0.1%FS)
Accuracy
0.01Ω~10Ω
10Ω~7.5KΩ
0.005Ω~10Ω
10Ω~7.5KΩ
Constant
resistance
mode *1
Range
Constant
Range
4500W
6KW
power
Resolution
100mW
100mW
0.2%+0.2%FS
0.2%+0.2%FS
Mode *3
16bit
Resolution
Accuracy
0.01%+0.08S *2
Accuracy
16bit
0.01%+0.0008S
0.01%+0.08S *2
0.01%+0.0008S
Dynamic mode
CC mode
20uS~3600S /Res:1uS
T1&T2
5uS±100ppm
Accuracy
Ascending/descending
slope *4
0.001~0.25A/uS
0.01~2.5A/uS
0.001~0.25A/uS
0.01~2.5A/uS
≒200uS
Minimum rise time *5
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~18V
0~120V
0~18V
0~120V
Resolution
1 mV
10 mV
1 mV
10mV
±(0.025%+0.025%FS)
Accuracy
Range
0~60A
0~600A
0~72A
0~720A
Resolution
1mA
10mA
1mA
10mA
±(0.05%+0.1%FS)
Accuracy
Range
4500W
6KW
Resolution
100mW
100mW
±(0.2%+0.2%FS)
Accuracy
Protection range
≒4550W
Overpower protection
Overcurrent protection
≒66A
≒6050W
≒66A
≒79.2A
≒792A
≒79.2A
≒792A
≒130V
Overvoltage protection
Overtemperature
≒85℃
protection
Specification
Current (CC)
Short circuit
≒66A
≒660A
0V
Voltage (CV)
Resistance
(CR)
≒3mΩ
≒2.5mΩ
Input
terminal
300KΩ
impedance
Dimension
W439*H266*D590(mm)
Copyright © ITECH Electronics Co., Ltd.
60
Technical Specifications
Model
IT8818D
0~60V
Input voltage
Rated value
( 0-40 °C)
0~70A
Input current
6KW
Input power
Min.
operating
0.1V/70A
1V/700A
0.1~6V
0.1~60V
1mV
10mV
±(0.05%+0.02%FS)
±(0.05%+0.025%FS)
voltage
Constant
Range
voltage
Resolution
mode
0~700A
Accuracy
Constant
Range
0~70A
0~700A
current
Resolution
1mA
10mA
±(0.1%+0.1%FS)
±(0.1%+0.1%FS)
0.005Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
Mode *3
16bit
Resolution
Accuracy
0.01%+0.08S
0.01%+0.0008S
6KW
100mW
0.2%+0.2%FS
Accuracy
Dynamic mode
CC mode
20uS~3600S /Res:1 uS
T1&T2
Dynamic
mode
1 uS±100ppm
Accuracy
Ascending/des
cending slope
0.0001~0.6A/uS
0.001~2.5A/uS
*4
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
0~6V
0~60V
0.1 mV
1 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~70A
0~700A
Resolution
1mA
10mA
Range
Resolution
Accuracy
±(0.05%+0.05%FS)
Accuracy
6KW
Range
100mW
Resolution
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒≒6KW
protection
Overcurrent
protection
Overvoltage
protection
Overtempera
≒77A
≒770A
≒65V
≒85℃
Copyright © ITECH Electronics Co., Ltd.
61
Technical Specifications
ture
protection
Specification
Current (CC)
≒77A
≒770A
0V
0V
≒1mΩ
≒1mΩ
Short circuit Voltage (CV)
Resistance (CR)
Input
150KΩ
terminal
impedance
W439*H266*D590(mm)
Dimension
Model
IT8830
0~120V
Input voltage
Rated value
( 0-40 °C)
0~500A
10KW
Input power
Min. operating
voltage
Constant
Range
voltage
Resolution
mode
0~50A
Input current
Accuracy
0.1V/50A
1V/500A
0.1~18V
0.1~120V
1mV
10mV
±(0.025%+0.05%FS)
±(0.025%+0.05%FS)
Constant
Range
0~50A
0~500A
current
Resolution
1mA
10mA
±(0.05%+0.1%FS)
±(0.05%+0.1%FS)
0.005Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
Mode *3
16bit
Resolution
Accuracy
0.01%+0.08S
*2
0.01%+0.0008S
10KW
1W
0.2%+0.2%FS
Accuracy
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
0~18V
0~120V
1 mV
10 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~50A
0~500A
Resolution
1mA
10mA
Range
Resolution
Accuracy
±(0.05%+0.05%FS)
Accuracy
10KW
Range
1W
Resolution
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒10.1KW
protection
Overcurrent
≒55A
Copyright © ITECH Electronics Co., Ltd.
≒550A
62
Technical Specifications
protection
Overvoltage
≒130V
protection
Overtemperatur
≒85℃
e protection
Specification
Short circuit
Current (CC)
≒55A
≒550A
Voltage (CV)
0V
0V
≒2mΩ
≒2mΩ
Resistance
(CR)
Input
terminal
300KΩ
impedance
Dimension
12U
Model
IT8830B
0~500V
Input voltage
Rated value
( 0-40 °C)
Input current
0~200A
10KW
Input power
Min. operating
voltage
Constant
Range
voltage
Resolution
mode
0~20A
Accuracy
0.3V/20A
3V/200A
0.1~50V
0.1~500V
1mV
10mV
±(0.025%+0.05%FS)
±(0.05%+0.05%FS)
Constant
Range
0~20A
0~200A
current
Resolution
1mA
10mA
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
0.02Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
Mode *3
16bit
Resolution
Accuracy
0.01%+0.08S
*2
0.01%+0.0008S
10KW
1W
0.2%+0.2%FS
Accuracy
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
0~50V
0~500V
1mV
10 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~20A
0~200A
Resolution
1mA
10mA
Range
Resolution
Accuracy
Accuracy
±(0.05%+0.05%FS)
10KW
Range
1W
Resolution
Accuracy
±(0.2%+0.2%FS)
Protection range
Copyright © ITECH Electronics Co., Ltd.
63
Technical Specifications
Overpower
≒10.1KW
protection
Overcurrent
≒22A
protection
≒220A
Overvoltage
≒530V
protection
Overtemperatu
≒85℃
re protection
Specification
Short circuit
Current (CC)
≒22A
≒220A
Voltage (CV)
0V
0V
≒15mΩ
≒15mΩ
Resistance
(CR)
Input terminal
1MΩ
impedance
Dimension
12U
Model
IT8830H
0~800V
Input voltage
Rated value
( 0-40 °C)
Input current
0~100A
10KW
Input power
Min. operating
voltage
Constant
Range
voltage
Resolution
mode
0~10A
Accuracy
0.3V/10A
3V/100A
0.1~80V
0.1~800V
1mV
10mV
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
Constant
Range
0~10A
0~100A
current
Resolution
1mA
10mA
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
0.05Ω~10Ω
10Ω~7.5KΩ
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
Mode *3
16bit
Resolution
Accuracy
0.01%+0.08S *2
0.01%+0.0008S
10KW
1W
0.2%+0.2%FS
Accuracy
Measuring range
Read-back
voltage
Read-back
current
Read-back
0~80V
0~800V
1 mV
10 mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~10A
0~100A
Resolution
1mA
10mA
Range
Resolution
Accuracy
Accuracy
Range
±(0.05%+0.05%FS)
10KW
Copyright © ITECH Electronics Co., Ltd.
64
Technical Specifications
power
1W
Resolution
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒10.1KW
protection
Overcurrent
≒11A
protection
≒110A
Overvoltage
≒850V
protection
Overtemperatur
≒85℃
e protection
Specification
Short circuit
Current (CC)
≒11A
≒110A
Voltage (CV)
0V
0V
≒30mΩ
≒30mΩ
Resistance
(CR)
Input
terminal
2MΩ
impedance
Dimension
12U
Model
Input voltage
Rated value
( 0-40 °C)
Input current
operating
voltage
Constant
Range
voltage
Resolution
Constant
current
mode
Constant
resistance
mode *1
Accuracy
0~120V
0~120V
0~75A
0~750A
0~100A
15KW
0~1000A
20KW
0.15V/75A
1.5V/750A
0.15V/100A
1.5V/1000A
0.1~18V
0.1~120V
0.1~18V
0.1~120V
1mV
10mV
1mV
10mV
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
Range
0~75A
0~750A
0~100A
0~1000A
Resolution
1mA
10mA
10mA
100mA
±(0.1%+0.1%FS)
±(0.2%+0.1%F
S)
0.005Ω~10Ω
10Ω~7.5KΩ
Accuracy
Range
±(0.1%+0.1%FS)
0.005Ω~10Ω
Accuracy
Range
power
Resolution
Accuracy
10Ω~7.5KΩ
16bit
Resolution
Constant
Mode *3
IT8832
Input power
Min.
mode
IT8831
0.01%+0.08S
*2
16bit
0.01%+0.0008S
0.01%+0.08S
*2
0.01%+0.0008
S
15KW
20KW
1W
1W
0.2%+0.2%FS
0.25%+0.25%FS
Measuring range
Read-back
Range
0~18V
0~120V
0~18V
0~120V
voltage
Resolution
1 mV
10mV
1 mV
1 0mV
Copyright © ITECH Electronics Co., Ltd.
65
Technical Specifications
Read-back
current
Accuracy
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~75A
0~750A
0~100A
0~1000A
Resolution
1mA
10mA
10mA
100mA
Accuracy
±(0.1%+0.1%FS)
±(0.1%+0.1%FS)
15KW
20KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.25%FS)
Range
Read-back
Resolution
power
Accuracy
Protection range
Overpower
≒15.1KW
protection
Overcurrent
≒82.5A
protection
Overvoltage
protection
Overtemperat
ure protection
≒20.1KW
≒110A
≒825A
≒1100A
≒130V
≒130V
≒85℃
≒85℃
Specification
Current (CC)
Short circuit Voltage (CV)
Resistance (CR)
Input terminal
≒82.5A
≒825A
≒110A
≒1100A
0V
0V
0V
0V
≒2mΩ
≒2mΩ
≒1.5mΩ
≒1.5mΩ
300KΩ
impedance
Dimension
300KΩ
27U
Model
IT8833
0~120V
Input voltage
Rated value
( 0-40 °C)
0.18V/150A
1.8V/750A
0.1~18V
0.1~120V
1mV
10mV
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
Range
0~150A
0~1500A
Resolution
10mA
100mA
±(0.1%+0.1%FS)
±(0.2%+0.1%FS)
mode
Constant
mode *1
0.005Ω~10Ω
10Ω~7.5KΩ
Resolution
Accuracy
resistance
Constant power
Mode *3
Range
Accuracy
Constant current
25KW
operating
voltage
mode
0~1500A
Input power
Min.
Constant voltage
0~150A
Input current
Range
16bit
Resolution
Accuracy
0.01%+0.08S *2
0.01%+0.0008S
25KW
Range
1W
Resolution
0.2%+0.2%FS
Accuracy
Measuring range
Copyright © ITECH Electronics Co., Ltd.
66
Technical Specifications
Read-back voltage
Range
0~18V
0~120V
Resolution
1 mV
10mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~150A
0~1500A
Resolution
10mA
100mA
Accuracy
Read-back current
±(0.1%+0.1%FS)
Accuracy
25KW
Range
Read-back power
1W
Resolution
±(0.2%+0.2%FS)
Accuracy
Protection range
Overpower
≒25.1KW
protection
Overcurrent
≒165A
protection
≒1650A
Overvoltage
≒130V
protection
Overtemperature
≒85℃
protection
Specification
Short circuit
Current (CC)
≒165A
≒1650A
Voltage (CV)
0V
0V
≒1.2mΩ
≒1.2mΩ
Resistance (CR)
Input
terminal
300KΩ
impedance
Dimension
27U
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
Accuracy
IT8832B
0~500V
0~500V
0~30A
0~300A
0~40A
15KW
Input power
Min. operating
IT8831B
0~400A
20KW
0.25V/30A
2.5V/300A
0.25V/40A
2.5V/400A
0.1~50V
0.1~500V
0.1~50V
0.1~500V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
±(0.025%+0.05%FS)
Constant
Range
0~30A
0~300A
0~40A
0~400A
current
Resolution
1mA
10mA
1mA
10mA
mode
Constant
resistance
mode *1
Accuracy
Range
±(0.05%+0.05%FS)
0.01Ω~10Ω
16bit
Resolution
Accuracy
Constant
Range
power
Resolution
10Ω~7.5KΩ
0.01%+0.08S
*2
0.01%+0.0008S
±(0.05%+0.1%FS)
0.01Ω~10Ω
10Ω~7.5KΩ
16bit
0.01%+0.08S
*2
0.01%+0.0008
S
15KW
20KW
1W
1W
Copyright © ITECH Electronics Co., Ltd.
67
Technical Specifications
Mode *3
0.2%+0.2%FS
Accuracy
0.2%+0.2%FS
Measuring range
Range
Read-back
Resolution
voltage
current
0~500V
0~50V
0~500V
1mV
10 mV
1mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Read-back
0~50V
Range
0~30A
0~300A
0~40A
0~400A
Resolution
1mA
10mA
1mA
10mA
Accuracy
±(0.05%+0.05%FS)
±(0.05%+0.1%FS)
15KW
20KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Read-back
Resolution
power
±(0.025%+0.025%FS)
Accuracy
Protection range
Overpower
≒20.1KW
≒15.1KW
protection
Overcurrent
≒33A
protection
Overvoltage
protection
≒330A
≒44A
≒440A
≒530V
≒530V
≒85℃
≒85℃
Overtemperat
ure
protection
Specification
Short circuit
Current (CC)
≒33A
≒330A
≒44A
≒440A
Voltage (CV)
0V
0V
0V
0V
≒8mΩ
≒8mΩ
≒6mΩ
≒6mΩ
Resistance
(CR)
1MΩ
Input
1MΩ
terminal
impedance
Dimension
27U
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
Accuracy
IT8834B
0~500V
0~500V
0~50A
0~500A
0~60A
25KW
Input power
Min. operating
IT8833B
0~600A
30KW
0.25V/50A
2.5V/500A
0.3V/60A
3V/600A
0.1~50V
0.1~500V
0.1~50V
0.1~500V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
±(0.025%+0.05%FS)
Constant
Range
0~50A
0~500A
0~60A
0~600A
current
Resolution
1mA
10mA
1mA
10mA
mode
Constant
Accuracy
Range
±(0.05%+0.1%FS)
0.01Ω~10Ω
10Ω~7.5KΩ
Copyright © ITECH Electronics Co., Ltd.
±(0.1%+0.1%FS)
0.01Ω~10Ω
10Ω~7.5KΩ
68
Technical Specifications
resistance
mode *1
Resolution
Constant
Range
power
Resolution
Accuracy
Mode *3
16bit
0.01%+0.008S
*2
Accuracy
16bit
0.01%+0.0008S
0.01%+0.008S
*2
0.01%+0.0008S
25KW
30KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Range
Resolution
Accuracy
Read-back
current
power
0~500V
0~50V
0~500V
1mV
10 mV
1 mV
10mV
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~50A
0~500A
0~60A
0~600A
Resolution
1mA
10mA
1mA
10mA
Accuracy
Read-back
0~50V
±(0.05%+0.05%FS)
±(0.05%+0.1%FS)
25KW
30KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Resolution
Accuracy
Protection range
≒25.1KW
Overpower protection
Overcurrent protection
≒55A
≒30.1KW
≒550A
Overvoltage protection
Overtemperature
protection
≒66A
≒660A
≒530V
≒530V
≒85℃
≒85℃
Specification
Short circuit
Current (CC)
≒55A
≒550A
≒66A
≒660A
Voltage (CV)
0V
0V
0V
0V
≒5mΩ
≒5mΩ
≒5mΩ
≒5mΩ
Resistance
(CR)
1MΩ
Input
1MΩ
terminal
impedance
Dimension
27U
Model
Input voltage
Input current
Rated value
Input power
( 0-40 °C)
Min.
operating
IT8831H
IT8832H
0~800V
0~800V
0~15A
0~150A
0~20A
15KW
0~200A
20KW
0.3V/15A
3V/150A
0.3V/20A
3V/200A
0.1~80V
0.1~800V
0.1~80V
0.1~800V
1mV
10mV
1mV
10mV
voltage
Constant
Range
voltage
Resolution
mode
Constant
Accuracy
Range
±(0.05%+0.05%FS)
0~15A
0~150A
Copyright © ITECH Electronics Co., Ltd.
±(0.05%+0.05%FS)
0~20A
0~200A
69
Technical Specifications
current
1mA
Resolution
mode
0.02Ω~10Ω
Range
power
Resolution
Mode *3
10Ω~7.5KΩ
0.02Ω~10Ω
16bit
0.01%+0.08S
*2
Accuracy
Range
10mA
±(0.05%+0.05%FS)
10Ω~7.5KΩ
Resolution
Constant
1mA
±(0.05%+0.05%FS)
Accuracy
Constant
resistance
mode *1
10mA
Accuracy
16bit
0.01%+0.0008S
0.01%+0.08S *2
0.01%+0.0008S
15KW
20KW
1W
1W
0.2%+0.2%FS
±(0.2%+0.2%FS)
Measuring range
Read-back
voltage
Read-back
current
Range
0~80V
0~800V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
Accuracy
±(0.025%+0.025%FS)
Range
0~15A
0~150A
0~20A
0~200A
Resolution
1mA
10mA
1mA
10mA
Accuracy
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
15KW
20KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Read-back
Resolution
power
Accuracy
±(0.025%+0.025%FS)
Protection range
Overpower
≒20.1KW
≒15.1KW
protection
Overcurrent
≒16.5A
protection
Overvoltage
protection
Overtemperat
ure protection
≒165A
≒22A
≒220A
≒850V
≒850V
≒85℃
≒85℃
Specification
Short circuit
Current (CC)
≒16.5A
≒165A
≒22A
≒220A
Voltage (CV)
0V
0V
0V
0V
≒20mΩ
≒20mΩ
≒15mΩ
≒15mΩ
Resistance
(CR)
Input terminal
2MΩ
2MΩ
impedance
Dimension
27U
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
IT8834H
0~800V
0~800V
0~25A
0~250A
0~30A
25KW
Input power
Min. operating
IT8833H
0~300A
30KW
0.3V/25A
3V/250A
0.3V/30A
3V/300A
0.1~80V
0.1~800V
0.1~80V
0.1~800V
Copyright © ITECH Electronics Co., Ltd.
70
Technical Specifications
voltage
1mV
Resolution
mode
10mV
±(0.05%+0.05%FS)
Accuracy
1mV
10mV
±(0.05%+0.05%FS)
Constant
Range
0~25A
0~250A
0~30A
0~300A
current
Resolution
1mA
10mA
1mA
10mA
mode
±(0.05%+0.1%FS)
Accuracy
Constant
resistance
mode *1
10Ω~7.5KΩ
0.01%+0.08S
*2
Accuracy
Range
power
Resolution
0.01Ω~10Ω
16bit
Resolution
Constant
Mode *3
0.02Ω~10Ω
Range
±(0.05%+0.1%FS)
Accuracy
10Ω~7.5KΩ
16bit
0.01%+0.0008S
0.01%+0.08S *2
0.01%+0.0008
S
25KW
30KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Read-back
current
Range
0~80V
0~800V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
Accuracy
±(0.025%+0.025%FS)
±(0.025%+0.025%FS)
Range
0~25A
0~250A
0~30A
0~300A
Resolution
1mA
10mA
1mA
10mA
Accuracy
Read-back
power
±(0.05%+0.05%FS)
±(0.05%+0.05%FS)
25KW
30KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Resolution
Accuracy
Protection range
Overpower
≒30.1KW
≒25.1KW
protection
Overcurrent
≒27.5A
protection
Overvoltage
protection
≒275A
≒33A
≒330A
≒850V
≒850V
≒85℃
≒85℃
Overtemperat
ure
protection
Specification
Short circuit
Current (CC)
≒27.5A
≒275A
≒33A
≒330A
Voltage (CV)
0V
0V
0V
0V
≒12mΩ
≒12mΩ
≒10mΩ
≒10mΩ
Resistance
(CR)
2MΩ
Input
terminal
2MΩ
impedance
Dimension
Model
Rated value Input voltage
27U
IT8835B
IT8835H
0~500V
0~800V
Copyright © ITECH Electronics Co., Ltd.
71
Technical Specifications
( 0-40 °C)
0~70A
Input current
0~700A
Min. operating
Constant
Range
voltage
Resolution
mode
Constant
current
mode
0.3V/35A
3 V/350A
0.1~50V
0.1~500V
0.1~80V
0.1~800V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
0~700A
0~35A
0~350A
1mA
10mA
1mA
10mA
±(0.1%+0.1%FS)
±(0.1%+0.1%FS)
±(0.05%+0.1%FS)
±(0.05%+0.1%F
S)
0.01Ω~10Ω
10Ω~7.5KΩ
0.01Ω~10Ω
10Ω~7.5KΩ
Constant
Range
power
Resolution
16bit
Resolution
Accuracy
±(0.05%+0.05%FS)
0~70A
Resolution
Range
Mode *3
3V/700A
Range
Constant
resistance
mode *1
35KW
0.3V/70A
Accuracy
Accuracy
0~350A
35KW
Input power
voltage
0~35A
0.01%+0.08S *2
Accuracy
16bit
0.01%+0.0008S
0.01%+0.08S *2 0.01%+0.0008S
35KW
35KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~50V
0~500V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Range
Resolution
0~70A
0~700A
0~35A
0~350A
1mA
10mA
1mA
10mA
Accuracy
±(0.05%+0.1%FS)
±(0.05%+0.05%FS)
35KW
35KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Resolution
Accuracy
Protection range
Overpower
≒35.1KW
protection
Overcurrent
≒77A
protection
Overvoltage
protection
≒35.1KW
≒770A
≒38.5A
≒385A
≒530V
≒850V
≒85℃
≒85℃
Overtemper
ature
protection
Specification
Short circuit
Current (CC)
≒77/70A
≒770/700A
≒38.5/35A
≒385/350A
Voltage (CV)
0V
0V
0V
0V
≒4mΩ
≒4mΩ
≒8.5mΩ
≒8.5mΩ
Resistance
(CR)
Input
terminal
1MΩ
2MΩ
impedance
Copyright © ITECH Electronics Co., Ltd.
72
Technical Specifications
Dimension
37U
Model
Input voltage
Rated value
( 0-40 °C)
Min. operating
Range
voltage
Resolution
0~500V
0~800V
Range
current
Resolution
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
0~800A
0~400A
40KW
0.3V/80A
3V/800A
0.3V/40A
3 V/400A
0.1~50V
0.1~500V
0.1~80V
0.1~800V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
±(0.05%+0.05%FS)
0~80A
0~800A
0~40A
0~400A
1mA
10mA
1mA
10mA
±(0.1%+0.1%FS)
±(0.1%+0.1%FS) ±(0.05%+0.1%FS) ±(0.05%+0.1%FS)
0.01Ω~10Ω
10Ω~7.5KΩ
0.01Ω~10Ω
16bit
Resolution
Accuracy
0~40A
40KW
Accuracy
Constant
Mode *3
IT8836H
Input power
Constant
mode
IT8836B
0~80A
Input current
voltage
mode
37U
0.01%+0.08S *2
Accuracy
10Ω~7.5KΩ
16bit
0.01%+0.0008S
0.01%+0.08S *2
0.01%+0.0008S
40KW
40KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~50V
0~500V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Range
Resolution
Accuracy
0~80A
0~800A
0~40A
0~400A
1mA
10mA
1mA
10mA
±(0.05%+0.1%FS)
±(0.05%+0.05%FS)
40KW
40KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Resolution
Accuracy
Protection range
Overpower
≒40.1KW
protection
Overcurrent
≒88A
protection
Overvoltage
protection
≒40.1KW
≒880A
≒44A
≒440A
≒530V
≒850V
≒85℃
≒85℃
Overtemper
ature
protection
Specification
Current (CC)
Short circuit Voltage (CV)
Resistance
≒88/80A
≒880/800A
≒44/40A
≒440/400A
0V
0V
0V
0V
≒3.5mΩ
≒3.5mΩ
≒7.5mΩ
≒7.5mΩ
Copyright © ITECH Electronics Co., Ltd.
73
Technical Specifications
(CR)
Input
terminal
1MΩ
2MΩ
37U
37U
impedance
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
Input current
voltage
Constant
Range
voltage
Resolution
mode
Accuracy
Constant
Range
current
Resolution
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
Mode *3
IT8837H
0~500V
0~800V
0~90A
0~900A
0~450A
45KW
0.3V/90A
3V/900A
0.3V/45A
3 V/450A
0.1~50V
0.1~500V
0.1~80V
0.1~800V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
±(0.05%+0.05%FS)
0~90A
0~900A
0~45A
0~450A
1mA
10mA
1mA
10mA
±(0.1%+0.1%FS)
±(0.1%+0.1%FS)
0.005Ω~10Ω
10Ω~7.5KΩ
±(0.05%+0.1%FS)
0.01Ω~10Ω
16bit
Resolution
Accuracy
0~45A
45KW
Input power
Min. operating
IT8837B
0.01%+0.08S *2
Accuracy
10Ω~7.5KΩ
16bit
0.01%+0.0008S
0.01%+0.08S *2 0.01%+0.0008S
45KW
45KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~50V
0~500V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Range
Resolution
0~90A
0~900A
0~45A
0~450A
1mA
10mA
1mA
10mA
Accuracy
±(0.1%+0.1%FS)
±(0.05%+0.05%FS)
45KW
45KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Resolution
Accuracy
Protection range
≒45.1KW
Overpower protection
Overcurrent protection
≒99A
Overvoltage protection
Overtemperature
protection
≒45.1KW
≒990A
≒49.5A
≒495A
≒530V
≒850V
≒85℃
≒85℃
Specification
Short circuit
Current (CC)
≒99/90A
≒990/900A
≒49.5/45A
≒495/450A
Voltage (CV)
0V
0V
0V
0V
Copyright © ITECH Electronics Co., Ltd.
74
Technical Specifications
Resistance
≒3mΩ
(CR)
≒3mΩ
≒6.5mΩ
≒6.5mΩ
Input
terminal
1MΩ
2MΩ
37U
37U
impedance
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
voltage
Resolution
0~1000A
Range
current
Resolution
Accuracy
Range
Constant
Range
power
Resolution
0~500A
50KW
3V/1000A
0.3V/50A
3 V/500A
0.1~50V
0.1~500V
0.1~80V
0.1~800V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
±(0.05%+0.05%FS)
0~100A
0~1000A
0~50A
0~500A
10mA
100mA
1mA
10mA
±(0.1%+0.1%FS)
±(0.2%+0.1%FS)
0.005Ω~10Ω
10Ω~7.5KΩ
±(0.05%+0.1%FS) ±(0.05%+0.1%FS)
0.01Ω~10Ω
16bit
Resolution
Accuracy
0~50A
0.3V/100A
Accuracy
Constant
Mode *3
0~800V
50KW
Min. operating
Range
Constant
resistance
mode *1
0~500V
Input power
Constant
mode
IT8838H
0~100A
Input current
voltage
mode
IT8838B
0.01%+0.08S
*2
Accuracy
10Ω~7.5KΩ
16bit
0.01%+0.0008S
0.01%+0.08S *2
0.01%+0.0008S
50KW
50KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~50V
0~500V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Range
0~100A
0~1000A
0~50A
0~500A
10mA
100mA
1mA
10mA
Resolution
Accuracy
±(0.1%+0.1%FS)
±(0.05%+0.1%FS)
50KW
50KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Range
Resolution
Accuracy
Protection range
Overpower
≒50.1KW
protection
Overcurrent
protection
Overvoltage
protection
Overtemper
≒110A
≒50.1KW
≒1100A
≒55 A
≒550A
≒530V
≒850V
≒85℃
≒85℃
Copyright © ITECH Electronics Co., Ltd.
75
Technical Specifications
ature
protection
Specification
Short circuit
Current (CC)
≒110/100A
≒1100/1000A
≒55/50A
≒550/500A
Voltage (CV)
0V
0V
0V
0V
≒3mΩ
≒3mΩ
≒6mΩ
≒6mΩ
Resistance
(CR)
Input
terminal
1MΩ
2MΩ
42U
42U
impedance
Dimension
Model
Input voltage
Rated value
( 0-40 °C)
Min. operating
Range
voltage
Resolution
mode
Range
current
Resolution
mode
Accuracy
Constant
resistance
mode *1
Range
Constant
Range
power
Resolution
Mode *3
0~800V
0~1100A
0~600A
55KW
3V/1100A
0.3V/60A
3 V/600A
0.1~50V
0.1~500V
0.1~80V
0.1~800V
1mV
10mV
1mV
10mV
±(0.025%+0.05%FS)
±(0.05%+0.1%FS)
0~110A
0~1100A
0~60A
0~600A
10mA
100mA
1mA
10mA
±(0.1%+0.1%FS)
±(0.2%+0.1%FS)
0.005Ω~10Ω
10Ω~7.5KΩ
±(0.05%+0.1%FS) ±(0.05%+0.1%FS)
0.01Ω~10Ω
16bit
Resolution
Accuracy
0~60A
0.3V/110A
Accuracy
Constant
0~500V
55KW
Input power
Constant
IT8839H
0~110A
Input current
voltage
IT8839B
0.01%+0.08S *2
Accuracy
10Ω~7.5KΩ
16bit
0.01%+0.0008S
0.01%+0.08S *2
0.01%+0.0008S
55KW
55KW
1W
1W
0.2%+0.2%FS
0.2%+0.2%FS
Measuring range
Read-back
voltage
Read-back
current
Read-back
power
Range
0~50V
0~500V
0~80V
0~800V
Resolution
1 mV
10 mV
1 mV
10 mV
±(0.025%+0.025%FS)
Accuracy
Range
0~110A
0~1100A
0~60A
0~600A
10mA
100mA
1mA
10mA
Resolution
Accuracy
Range
±(0.1%+0.1%FS)
±(0.05%+0.1%FS)
55KW
55KW
1W
1W
±(0.2%+0.2%FS)
±(0.2%+0.2%FS)
Resolution
Accuracy
Protection range
Overpower
≒55.1KW
protection
Overcurrent
≒121A
≒55.1KW
≒1210A
Copyright © ITECH Electronics Co., Ltd.
≒66A
≒660A
76
Technical Specifications
protection
Overvoltage
protection
≒530V
≒850V
≒85℃
≒85℃
Overtemper
ature
protection
Specification
Short circuit
Current (CC)
≒121/110A
≒1210/1100A
≒66/60A
≒660/600A
Voltage (CV)
0V
0V
0V
0V
≒3mΩ
≒3mΩ
≒5mΩ
≒5mΩ
Resistance
(CR)
Input
terminal
1MΩ
2MΩ
42U
42U
impedance
Dimension
*1.The voltage/current input is no less than 10%FS (FS indicates the full
scope).
*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
*The above specifications may be subject to change without prior notice.
4.2 Additional features
Memory capacity: 100 groups.
Recommended calibration frequency: 1 time/year.
Cooling method: fan.
Fan control temperature:
Temperature 40°C
50°C
70°C
85°C
Fan status
First gear
Second
gear
Third
gear
Copyright © ITECH Electronics Co., Ltd.
Temperature protection (OH)
and load is shut off.
77
References of Load Communication Interfaces
Chapter5 References of Load
Communication Interfaces
IT8800 series electronic load is provided with three communication interfaces
to communicate with a computer for selection, including RS232, USB and
GPIB.
5.1 RS232 interface
Cable connection load with both ends of COM interface (DB9) and computer.
Composite key [Shift] + 5 on front board can be used to enter system menu for
activation.
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.
NOTE
The rear board of IT8800 series has two COM interfaces. The upper 9-pin COM interface
connector is RS232 interface; and the lower 9-pin COM interface is external signal control
interface.
RS-232 setting in procedure should be consistent with that in system menu of front board.
Press composite key [Shift] + 5 to change (if necessary). Send a ^C or ^X character string to
the load to pause data transmission. It will clear any uncompleted operation and waive any
uncompleted output.
RS-232 data format
RS-232 data comprises start bit, odd and even parity check bit, stop bit and
8-bit data bit. Start bit and stop bit are not editable. However, next odd or even
item can be selected by front board [Shift] + 5. The odd and even items are
saved in NVM.
Baud rate
Through front board [Shift] + 5, the user may select one Baud rate saved in
NVM: 4800 9600 19200 38400 57600 115200
RS-232 Connection
Use RS-232 cable with DB-9 interface because the RS-232 serial port can be
connected controller (e.g. PC) serial port. Do not use modulating cable of
air-conditioner. Refer to Table 2-2 for plug pin.
If your computer is provided with a RS-232 interface with DB-25 plug, a cable
Copyright © ITECH Electronics Co., Ltd.
78
References of Load Communication Interfaces
and a adapter with DB-25 plug (one end) and DB-9 plug (the other end) are
required (not the modulating cable of the air-conditioner).
RS232 Pins of Plug
Base pin
number
1
2
3
4
5
6
7
8
Description
9
No conjunction
No conjunction
TXD, data transmission
RXD, data receiving
No conjunction
GND, grounding
No conjunction
CTS, clear to send
RTS, request to send
RS-232 troubleshooting:
In case of connection failure of RS-232, perform following check:
 Check if the computer and load are provided with same Baud rate, parity
check bit, data bit and flow control. The power shall be configured with one
start bit (fixed) and one stop bit (fixed).
 Just as described in the RS-232 connector, correct interface cable or
adapter shall be adopted. Note: even if the cable is equipped with right plug,
internal wiring may be incorrect.
 The interface cable must be connected to the correct serial port (COM1,
COM2, etc.) of the computer.
Setting of communication
Before communication operation, be sure to match load and PC parameters (as
follows).
Baud rate: 9600 (4800/9600/19200/38400/57600/15200). You may enter
system menu through the board to set communication Baud rate.
Data bit: 8 bits
Stop bit: 1 bit
Check: (none, even, odd)
EVEN All all 8 data bits have even-parity check
ODD All all 8 data bits have odd-parity check
NONE All all 8 data bits have no check
Local address: (0-31, factory set value: 0)
Start Bit
Parity=None
8 Data Bits
Stop Bit
5.2 USB Interface
Connect the load and the computer using a cable with two USB interfaces
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79
References of Load Communication Interfaces
(each end). All functions of the load can be programmed via USB.
The functions of load USB488 interface are as follows:
 The interface is 488.2 USB488 Interface.
 The interface receives requests of REN_CONTROL, GO_TO_LOCAL and
LOCAL_LOCKOUT.
 The interface receives the command MsgID=TRIGGER USBTMC and
conveys the TRIGGER command to the functional layer.
The functions of load USB488 device are as follows:
 Capable to read all common SCPI commands.
 SR1 enabled.
 RL1 enabled.
 DT1 enabled.
5.3 GPIB interface
Firstly, connect load GPIB interface and computer GPIB card through IEEE488
bus and ensure sufficient contact. Tighten them with screws. Set address. Load
address range: 0-31. Press [Shift] + 5 to enter system menu functions. Press
Left/Right key to find Communication. Select GPIB and set address. Input
address and press [Enter] for confirmation. The load works by setting GPIB
address on front board. GPIB address is saved in NVM.
Copyright © ITECH Electronics Co., Ltd.
80
Appendix
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.
Model
Specification
Cross section
Length
IT-E301/10A
10A
-
1m
IT-E301/30A
2
30A
IT-E301/30A
6mm
30A
IT-E301/60A
6mm
60A
IT-E301/120A
2m
2
1m
2
2m
2
2m
70mm
240A
IT-E301/360A
1.5m
2
50mm
240A
IT-E301/240A
2m
2
20mm
120A
IT-E301/240A
1.2m
2
70mm
360A
95mm
For maximum current of AWG copper wire, refer to table blow.
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
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.
Copyright © ITECH Electronics Co., Ltd.
81
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.
2. Visit ITECH website: www.itechate.com.
3. Select the most convenient contact method for further information.
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