I-Tech IT-M3800 Series User manual

Regenerative DC Electronic
Load
IT-M3800 Series User Manual
Model: IT-M3800 Series
Version: V1.0/01,2022

Notices
© Itech Electronic, Co.,
Ltd. 2022
No part of this manual
may be reproduced in any
form or by any means (in-
cluding electronic storage
and retrieval or translation
into a foreign language)
without prior permission
and written consent from
Itech Electronic, Co., Ltd.
as governed by interna-
tional copyright laws.
Manual Part Number
Trademarks
Pentium is U.S. registered
trademarks of Intel
Corporation.
Microsoft, Visual Studio,
Windows and MS Win-
dows are registered
trademarks of Microsoft
Corporation in the United
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tries and regions.
Warranty
The materials contained in this docu-
ment are provided “as is”, and is sub-
ject to change, without prior notice, in
future editions. Further, to the maxi-
mum extent permitted by applicable
laws, ITECH disclaims all warrants, ei-
ther express or implied, with regard to
this manual and any information con-
tained herein, including but not limited
to the implied warranties of merchant-
ability and fitness for a particular pur-
pose. ITECH shall not be held liable
for errors or for incidental or indirect
damages in connection with the fur-
nishing, use or application of this
document or of any information con-
tained herein. Should ITECH and the
user enter into a separate written
agreement with warranty terms cover-
ing the materials in this document that
conflict with these terms, the warranty
terms in the separate agreement shall
prevail.
Technology Licenses
The hardware and/or software de-
scribed herein are furnished under a li-
cense and may be used or copied only
in accordance with the terms of such
license.
Restricted Rights Legend
Restricted permissions of the U.S.
government. Permissions for software
and technical data which are author-
ized to the U.S. Government only in-
clude 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)
and DFARS 227.7202-3 (permissions
for commercial computer software or
computer software documents) while
providing the customized business li-
censes of software and technical data.
Safety Notices
A CAUTION sign denotes
a hazard. It calls attention
to an operating procedure
or practice that, if not cor-
rectly performed or ad-
hered to, could result in
damage to the product or
loss of important data. Do
not proceed beyond a
CAUTION sign until the in-
dicated conditions are
fully understood and met.
A WARNING sign denotes
a hazard. It calls attention
to an operating procedure
or practice that, if not cor-
rectly performed or ad-
hered to, could result in
personal injury or death.
Do not proceed beyond a
WARNING sign until the
indicated conditions are
fully understood and met.
A NOTE sign denotes im-
portant hint. It calls atten-
tion to tips or
supplementary informa-
tion that is essential for
users to refer to.

Copyright © Itech Electronic Co., Ltd. I
IT-M3800 Series User Manual
Quality Certification and Assurance
We certify that series instrument meets all the published specifications at time
of shipment from the factory.
Warranty
ITECH warrants that the product will be free from defects in material and work-
manship under normal use for a period of one (1) year from the date of delivery
(except those described in the Limitation of Warranty below).
For warranty service or repair, the product must be returned to a service center
designated by ITECH.
•The product returned to ITECH for warranty service must be shipped PRE-
PAID. And ITECH will pay for return of the product to customer.
•If the product is returned to ITECH for warranty service from overseas, all
the freights, duties and other taxes shall be on the account of customer.
Limitation of Warranty
This Warranty will be rendered invalid in case of the following:
•Damage caused by circuit installed by customer or using customer own
products or accessories;
•Modified or repaired by customer without authorization;
•Damage caused by circuit installed by customer or not operating our prod-
ucts under designated environment;
•The product model or serial number is altered, deleted, removed or made il-
legible by customer;
•Damaged as a result of accidents, including but not limited to lightning, mois-
ture, fire, improper use or negligence.

Copyright © Itech Electronic Co., Ltd. II
IT-M3800 Series User Manual
Safety Symbols
Direct current ON ( power)
Alternating
current
OFF ( power)
Both direct and
alternating
current
Power-on state
Chassis (earth
ground) symbol.
Power-off state
Earth ( ground)
terminal
Reference
terminal
Caution Positive terminal
Warning ( refer to
this manual for
specific Warning
or Caution
information)
Negative terminal
A chassis
terminal
- -
Safety Precautions
The following safety precautions must be observed during all phases of opera-
tion of this instrument. Failure to comply with these precautions or specific warn-
ings elsewhere in this manual will constitute a default under safety standards of
design, manufacture and intended use of the instrument. ITECH assumes no li-
ability for the customer’s failure to comply with these precautions.

Copyright © Itech Electronic Co., Ltd. III
IT-M3800 Series User Manual
•Do not use the instrument if it is damaged. Before operation, check
the casing to see whether it cracks. Do not operate the instrument
in the presence of inflammable gasses, vapors or dusts.
•The instrument is provided with a power cord during delivery and
should be connected to a socket with a protective earth terminal, a
junction box or a three-phase distribution box. Before operation, be
sure that the instrument is well grounded.
•Please always use the provided cable to connect the instrument.
•Check all marks on the instrument before connecting the instru-
ment to power supply.
•Ensure the voltage fluctuation of mains supply is less than 10% of
the working voltage range in order to reduce risks of fire and elec-
tric shock.
•Do not install alternative parts on the instrument or perform any un-
authorized modification.
•Do not use the instrument if the detachable cover is removed or
loosen.
•To prevent the possibility of accidental injuries, be sure to use the
power adapter supplied by the manufacturer only.
•We do not accept responsibility for any direct or indirect financial
damage or loss of profit that might occur when using the
instrument.
•This instrument is used for industrial purposes, do not apply this
product to IT power supply system.
•Never use the instrument with a life-support system or any other
equipment subject to safety requirements.

Copyright © Itech Electronic Co., Ltd. IV
IT-M3800 Series User Manual
•SHOCK HAZARD Ground the Instrument. This product is provided
with a protective earth terminal. To minimize shock hazard, the in-
strument must be connected to the AC mains through a grounded
power cable, with the ground wire firmly connected to an electrical
ground (safety ground) at the power outlet or distribution box. Any
interruption of the protective (grounding) conductor or disconnec-
tion of the protective earth terminal will cause a potential shock
hazard that could result in injury or death.
•Before applying power, verify that all safety precautions are taken.
All connections must be made with the instrument turned off, and
must be performed by qualified personnel who are aware of the
hazards involved. Improper actions can cause fatal injury as well as
equipment damage.
•SHOCK HAZARD, LETHAL VOLTAGES This product can input the
dangerous voltage that can cause personal injury, and the operator
must always be protected from electric shock. Ensure that the input
electrodes are either insulated or covered using the safety covers
provided, so that no accidental contact with lethal voltages can
occur.
•Never touch cables or connections immediately after turning off the
instrument. Verify that there is no dangerous voltage on the electro-
des or sense terminals before touching them.
•After using the device, turn off the power switch of the device be-
fore unplugging the power cord or disassembling the terminals. Do
not touch the cable or the terminal immediately. Depending on the
model, the dangerous voltage at the plug or terminal is maintained
for 10 seconds after the device is switched off. Make sure that there
is no dangerous voltage before touching them.
•Failure to use the instrument as directed by the manufacturer may
render its protective features void.
•Always clean the casing with a dry cloth. Do not clean the internals.
•Make sure the vent hole is always unblocked.
Environmental Conditions
The instrument is designed for indoor use and an area with low condensation.
The table below shows the general environmental requirements for the
instrument.

Copyright © Itech Electronic Co., Ltd. V
IT-M3800 Series User Manual
Environmental Conditions Requirements
Operating temperature 0°C～50°C
Operating humidity 20%～80%( non-condensation)
Storage temperature -10°C～70 °C
Altitude Operating up to 2,000 meters
Installation category II
Pollution degree Pollution degree 2
In order to ensure the accuracy of measurement, it is recommended to oper-
ate 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).
The UKCA tag shows that the product complies with
the provisions of all relevant United Kingdom 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 nor-
mal 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; oth-
erwise, the product should be put into the recycling
system.

Copyright © Itech Electronic Co., Ltd. VI
IT-M3800 Series User Manual
Waste Electrical and Electronic Equipment
(WEEE) Directive
Waste electrical and electronic equip-
ment (WEEE) directive, 2002/96/EC
The product complies with tag re-
quirements 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 classifi-
cation in Annex I of the WEEE direc-
tive, this instrument belongs to the
“Monitoring” product.
If you want to return the unnecessary
instrument, please contact the near-
est sales office of ITECH.

Copyright © Itech Electronic Co., Ltd. VII
IT-M3800 Series User 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 11:2015+A1:2016 Ed 6.1
IEC 61000-3-2: 2018 RLV
IEC 61000-3-3: 2013+A1:2017
IEC 61000-4-2:2008
IEC 61000-4-3 2006+A1:2007+A2:2010/ EN 61000-4-3 A1:2008+A2:2010
IEC 61000-4-4:2012
IEC 61000-4-5:2014+A1:2017
IEC 61000-4-6:2013+cor1:2015
IEC 61000-4-11:2004+A1:2017
1. The product is intended for use in non-residential/non-domestic environments. Use of the
product in residential/domestic environments may cause electromagnetic interference.
2. Connection of the instrument to a test object may produce radiations beyond the specified
limit.
3. Use high-performance shielded interface cable to ensure conformity with the EMC standards
listed above.
Safety Standard
IEC 61010-1:2010+A1:2016

Copyright © Itech Electronic Co., Ltd. VIII
IT-M3800 Series User Manual
Content
Quality Certification and Assurance .................................................................................. I
Warranty ............................................................................................................................ I
Limitation of Warranty........................................................................................................ I
Safety Symbols................................................................................................................. II
Safety Precautions............................................................................................................ II
Environmental Conditions................................................................................................ IV
Regulation Tag ................................................................................................................. V
Waste Electrical and Electronic Equipment (WEEE) Directive ....................................... VI
Compliance Information.................................................................................................. VII
1 Quick Reference................................................................................................................. 1
1.1 Brief Introduction...................................................................................................... 1
1.2 Front-Panel Overview .............................................................................................. 3
1.3 Keyboard Introduction.............................................................................................. 4
1.4 Push-on Knob .......................................................................................................... 6
1.5 Rear Panel Introduction ........................................................................................... 7
1.6 VFD Indicator Lamps Description ............................................................................ 8
1.7 Configuration Menu Function................................................................................... 9
1.8 System Menu Function .......................................................................................... 10
1.9 Options Introduction............................................................................................... 15
2 Inspection and Installation................................................................................................ 17
2.1 Verifying the Shipment........................................................................................... 17
2.2 Instrument Size Introduction .................................................................................. 18
2.3 Connecting the Power Cord................................................................................... 20
2.4 Connecting the Device Under Test (DUT) ............................................................. 25
2.5 Remote Interface Connection ................................................................................ 29
2.5.1 USB Interface .............................................................................................. 29
2.5.2 LAN Interface............................................................................................... 30
2.5.3 CAN Interface .............................................................................................. 34
2.5.4 GPIB Interface (Optional) ............................................................................ 36
2.5.5 RS–232 Interface (Optional)........................................................................ 37
3 Getting Started ................................................................................................................. 39
3.1 Power-on Self-Test ................................................................................................ 39
3.2 Set Input Value....................................................................................................... 43
3.3 Use the Front Panel Menu. .................................................................................... 43
3.4 On/Off Control........................................................................................................ 44
4 Load Function................................................................................................................... 45
4.1 Programming the Input .......................................................................................... 45
4.1.1 Select the Operation Mode (Mode) ............................................................. 45
4.1.2 Basic Operation Mode ................................................................................. 46
4.1.3 Complex Operation Mode ........................................................................... 47
4.1.4 Set the Input-On/Input-Off Delay Time （On Delay/ Off Delay）............... 49
4.1.5 Set I-Rise / I-Fall Slope（I-Rise / I-Fall Slope）.......................................... 49
4.1.6 Set V-Rise / V-Fall Slope（V-Rise / V-Fall Slope）.................................... 50
4.1.7 Set P-Rise / P-Fall Slope（P-Rise / P-Fall Slope）.................................... 50
4.1.8 Short-Circuit Analog Function ..................................................................... 50
4.1.9 VON Function（Von）................................................................................ 51
4.2 Advanced Feature.................................................................................................. 53
4.2.1 LIST Function .............................................................................................. 53
4.2.2 Battery Discharging Test Function .............................................................. 58
4.3 Protection Function ................................................................................................ 59
4.3.1 Set Over-Current Protection (OCP)............................................................. 61
4.3.2 Set Over-Power Protection (OPP)............................................................... 62
4.3.3 Set Under-Voltage Protection (UVP)........................................................... 63
4.3.4 Over-Temperature Protection (OTP)........................................................... 63
4.3.5 Sense Reverse Protection........................................................................... 64

Copyright © Itech Electronic Co., Ltd. IX
IT-M3800 Series User Manual
5 Basic Operation................................................................................................................ 66
5.1 Local/Remote Mode Switch ................................................................................... 66
5.2 Key Lock Function ................................................................................................. 67
5.3 Save and Recall Operations .................................................................................. 67
5.3.1 Save Operation............................................................................................ 68
5.3.2 Recall Operation.......................................................................................... 68
5.4 Data Logging Function........................................................................................... 68
5.5 Set the Beeper Status (Beep) ................................................................................ 71
5.6 Set the Power-on State (PowerOn) ....................................................................... 72
5.7 Sense Function (Sense) ........................................................................................ 74
5.8 Select Trigger Source (Trig Source) ...................................................................... 74
5.9 Set the Communication Information (I/O Con) ...................................................... 76
5.10 Set Parallel Operation Mode (Parallel) ................................................................ 76
5.11 Digital I/O Function (Digital Port) ......................................................................... 79
5.11.1 IO–1. Ps-Clear, Not-Invert......................................................................... 81
5.11.2 IO–2. Ps, Not-Invert................................................................................... 84
5.11.3 IO–3. Off-Status, Not-Invert....................................................................... 85
5.11.4 IO–4.Trig(in), Not-Invert ............................................................................ 87
5.11.5 IO–5. INH-Living, Not-Invert ...................................................................... 90
5.11.6 IO–6. Sync-On, Not-Invert......................................................................... 93
5.11.7 IO–7. Sync-Off, Not-Invert......................................................................... 96
5.12 Analogue Function (Ext-Program) (Optional) ...................................................... 98
5.13 View the System Information (System Info) ...................................................... 103
5.14 Restored to Factory Setting (System Reset) ..................................................... 104
5.15 Observe Power Grid Information (AC-Meter) .................................................... 107
5.16 Display Loading Time (Disp on timer)................................................................ 107
5.17 System Upgrade ................................................................................................ 108
6 Technical Specification .................................................................................................. 111
6.1 Main Specification................................................................................................ 111
6.1.1 IT-M3801-10-120 .............................................................................................. 112
6.1.2 IT-M3802-10-240 .............................................................................................. 114
6.1.3 IT-M3803-10-360 .............................................................................................. 116
6.1.4 IT-M3807-10-720 .............................................................................................. 119
6.1.5 IT-M3806-80-120 .............................................................................................. 121
6.1.6 IT-M3812-80-240 .............................................................................................. 123
6.1.7 IT-M3806-300-60 .............................................................................................. 126
6.8 Supplemental Characteristics.............................................................................. 129
7 Routine Maintenance ..................................................................................................... 130
7.1 Instrument Self-Test............................................................................................. 130
7.2 Cleaning and Maintenance .................................................................................. 130
7.3 Contact of ITECH Engineers ............................................................................... 131
7.4 Return for Repair.................................................................................................. 132
A Appendix ........................................................................................................................ 134
A.1 Specifications of Red and Black Test Cables ..................................................... 134
A.2 Fuse Replacement .............................................................................................. 135

Quick Reference
1Quick Reference
This Chapter will introduce power-on check steps of this 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 key-
board keys as well as display functions to a quick view of load appearance,
structure and key usage functions before operation.
♦Brief Introduction
♦Front-Panel Overview
♦Keyboard Introduction
♦Push-on Knob
♦Rear Panel Introduction
♦VFD Indicator Lamps Description
♦Configuration Menu Function
♦System Menu Function
♦Options Introduction
1.1 Brief Introduction
IT-M3900 series integrates the features of a DC power supply, a bi-directional
power supply, a source and load system, and a regenerative electronic load in
one. It keeps the advantages of high power density and architecture design of
M series, power up to 6kw, current up to 510A, and voltage up to 1500V within
one 1U unit, effectively reducing the equipment occupation space and cabinet
time. wide-range models could meet different test requirements while matching
with multi-functional, high energy-saving, high-safety, and high-stability product
design, let the customer be confident to face a variety of complex testing, im-
proving the products competition ability.
IT-M3800 series regenerative DC electronic load can not only perform as a DC
load, but also feed back power to the grid, which saves electricity and cooling
costs for you. It can complete high-precision output and measurement, and sup-
ports multiple protection functions. It is well applied to the test of 5G communi-
cation and data center, industrial components test, aging test, PV and energy
storage test, power optimizer and other fields.
FEATURE
•Compact design, 1U@6kW, 2U@12kW
•Voltage range: 10~1500V
•Current range: 8A~720A
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Quick Reference
•Power range: 12kW
•Master/slave parallel connection with patented technology - keep good per-
formance while power extension
•Efficient power regeneration - reduce cost of electricity and cooling
•Slope of voltage, current and power is settable
•Battery discharge test
•Short-circuit simulation
•List function, max.200 steps
•8 operation modes under Source mode：CC/CV/CW/CP/ CC+CV/CV+CR/
CR+CC/CC+CV+CW+CR
•Von function - On/Off control
•Multiple protection: OVP / ±OCP / ±OPP / OTP /voltage transient drop pro-
tection/anti-islanding
•Power grid automatic detection
•Pre-charge to prevent current overshoot
•Built-in USB/CAN/LAN/digital IO interfaces, Optional GPIB/ Analog& RS232
Voltage
Level
Model Current Power Height
10V
IT-M3801-10-120 120A 1.2KW 1U
IT-M3802-10-240 240A 2.4KW 1U
IT-M3803-10-360 360A 3.6KW 1U
IT-M3807-10-720 720A 7.2KW 2U
32V
IT-M3802-32-80 80A 2KW 1U
IT-M3804-32-160 160A 4KW 1U
IT-M3806-32-240 240A 6KW 1U
IT-M3812-32-480 480A 12KW 2U
80V
IT-M3802-80-40 40A 2KW 1U
IT-M3804-80-80 80A 4KW 1U
IT-M3806-80-120 120A 6KW 1U
IT-M3812-80-240 240A 12KW 2U
300V
IT-M3802-300-20 20A 2KW 1U
IT-M3804-300-40 40A 4KW 1U
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Quick Reference
Voltage
Level
Model Current Power Height
IT-M3806-300-60 60A 6KW 1U
IT-M3812-300-120 120A 12KW 2U
500V
IT-M3802-500-12 12A 2KW 1U
IT-M3804-500-24 24A 4KW 1U
IT-M3806-500-36 36A 6KW 1U
IT-M3812-500-72 72A 12KW 2U
800V
IT-M3802-800-8 8A 2KW 1U
IT-M3804-800-16 16A 4KW 1U
IT-M3806-800-24 24A 6KW 1U
IT-M3812-800-48 48A 12KW 2U
1500V IT-M3806-1500-12 12A 6KW 1U
Naming rules for each series of model are as follows: IT-M38XX-YYY-ZZZ,
wherein, XX means rated power; YYY means rated voltage; and ZZZ means
rated current.
1.2 Front-Panel Overview
The front panel of this series of instruments is shown in the figure below.
1U Model
1 Power On/Off switch
2 USB storage device connec-
tion port
3 Vacuum fluorescent display
(VFD)
4 Function and composite keys
5 Numeric and composite keys
6 Push-on knob
7 Left, and right cursor navigation keys
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Quick Reference
2U Model
1 Power On/Off switch
2 USB storage device connec-
tion port
3 Vacuum fluorescent display
(VFD)
4 Function and composite keys
5 Numeric and composite keys
6 Up, down, left, and right cursor navigation
keys and Enter key
7 Push-on knob
1.3 Keyboard Introduction
The keyboard introduction of this series instrument is shown as follows.
1U Model
2U Model
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Quick Reference
Keys Description
[Shift] Composite key, combined with other keys to realize functions
marked above keys.
[Protect] Enter the Protect menu.
[On/Off] Turn the load input on or off. When lit, indicates that the input
is enabled or on.
[V-set] Set the input voltage value
[I-set] Set the input current value
[P-set] Set the input power value
[R-set] Set the resistance value
[Enter] Operation confirmation key
[Esc] Press this key to exit the current operation interface.
[0]-[9] Numeric keys
+/– Positive and negative signs
.Decimal point
Left / Right
navigation
keys
The left and right navigation keys are used to adjust the cur-
sor to the specified position or scrolls pages to view menu
items.
Composite key [Shift], combined with other keys to realize functions marked
above keys. The detailed functions are listed as follows.
The [Shift]+[XXX](YYY) combination key form identified in this document re-
fers to pressing [Shift] button first, then press the [XXX]button, please pay
attention to the sequence.
Keys Description
[Shift]+[Protect]
(Short)
Short circuit function key
[Shift]+[On/Off]
(Trigger)
Generate a local trigger signal.
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Quick Reference
Keys Description
[Shift]+[V-set]
(Config)
Enter to Configuration menu.
[Shift]+[I-set]
(Function)
Enter the Function menu.
[Shift]+[P-set]
(System)
Enter the System menu.
[Shift]+[R-set]
(Save)
Save the common parameter settings.
[Shift]+[Enter]
(Recall)
Returns the instrument to the specified setup.
[Shift]+[1] (Log) Enter the data logging function menu.
[Shift]+[2] (Lock) Turn the keyboard lock on or off.
[Shift]+[3] (Local) Switch remote control mode to local control mode.
1.4 Push-on Knob
This series Regenerative DC Electronic Load provides a knob on the front panel
as shown in the next figure.
The functions of the posh-on knob is described as follows.
•Adjust the value setting
•Select menu item
•Confirm the set value or the selected menu item
Adjust the Value Setting
In the value setting interface, rotate the knob clockwise to increase the set value
and anticlockwise to decrease the set value.
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Quick Reference
Select Menu Item
The knob can also be used to view menu items. In the menu item display inter-
face, turning the knob clockwise indicates that the next menu item is selected,
and turning the knob anticlockwise indicates that the previous menu item is
selected.
Confirm settings
After completing the value setting or selecting a menu item, pushing the knob
acts like pressing [Enter] key to confirm the operation.
1.5 Rear Panel Introduction
The rear panel of the of the this series model (after removing the protective cov-
er) is shown below.
1U Models
2U Models
1. Sense terminals (Vs+, Vs-)
2. DC input terminals of the load
3. Interface for optional accessories IT-E176 and IT-E177 (For details, see 1.9
Options Introduction)
4. Digital I/O interface: P-IO
5. LAN communication interface
6. CAN communication interface
7. USB communication interface
8. Communication interface of outer ring optical fiber (TX and RX)
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Quick Reference
This interface is used for the parallel connection between the units for the
communication of units in parallel.
9. AC power input terminals (L1, L2, L3, and PE)
1.6 VFD Indicator Lamps Description
This series instrument VFD indicator lamps description is as follows:
Table 1–1 VFD Indicator Lamps Description
Flag Function
Description Flag Function Description
OFF The input of the
load is turned off.
Sense Sense function of the load is
enabled.
CV The load is in a
state of constant
voltage input.
Rear Analog function begin to
work.
CC The load is in a
state of constant
current input.
Addr When received command
successfully, the flag will
display 3 seconds.
* The keyboard lock
is turned on.
Rmt Indicates that the instrument
is working in remote control
mode.
CR The load is in con-
stant resistance
state.
Error Error occur
Shift Using composite
function key
Prot The instrument enters the
protection state.
SRQ Indicates that the
internal status re-
quest event occurs.
Trig The instrument is in a state
of waiting for a trigger.
CW The load is in a con-
stant power input
state.
- -
Copyright © Itech Electronic Co., Ltd. 8

Quick Reference
1.7 Configuration Menu Function
This section gives an overview of the configuration menu of the this series
instrument.
The procedures to operate the configuration menu are as follows.
1. Press the composite keys [Shift]+[V-set] (Config) on the front panel to enter
the configuration menu.
The VFD shows configuration menu items and each menu item is marked
with a number. The user can use knob to scroll pages to view the other menu
items.
2. Press [Enter] to select the desired menu item.
Enter the parameter setting interface of this menu item.
3. After finishing the menu setting, press [Enter] key to save the setting.
Press [Esc] key to return to the previous menu level.
The descriptions of configuration menu of the load are listed in the table below.
Config Configuration menu of the load
Mode Set the operation mode
CC Constant current operation mode
CV Constant voltage operation mode
CW Constant power operation mode
CR Constant resistance operation mode
CVCC CV+CC complex operation mode
CVCR CV+CR complex operation mode
CCCR CC+CR complex operation mode
AUTO CC+CV+CW+CR complex operation
mode
Speed= High/
Low Loop speed setting: high speed / low speed.
On Delay Set the delay time to turn on the input.
Off Delay Set the delay time to turn off the input.
Copyright © Itech Electronic Co., Ltd. 9