ODA OPS Series User manual

Programmable DC Power Supply
User Manual
www.odacore.com
OPS Series
Manual Part NO. 018OPS-2.0

Legal Notices
© ODA Technologies.,Co.Ltd 2004
No part of this document may be photocopied, reproduced, or translated to another language without
the prior another language without the prior agreement and written consent of ODA agreement and
written consent of ODA Technologies.,Co.Ltd. as governed by Korea and international copyright laws.
Warranty Certification
The material contained in this document is provided “as is,” and is subject to being changed, without
notice, in future editions. Further, to the maximum extent permitted by applicable law, ODA disclaims
all warranties, either express or implied, with regard to this manual and any information contained
herein, including but not limited to the implied warranties of merchantability and fitness for a particular
purpose. ODA shall not be liable for errors or for incidental or be liable for errors or for incidental or
consequential damages in connection with the furnishing, use, or performance of this document or of
any information contained herein. Should ODA and the user have a separate written agreement with
warranty terms covering the material in this document that conflict with these terms, the warranty terms
in the separate agreement shall control.
Assistance
This product comes with the standard product warranty. Warranty options, extended support contacts,
product maintenance agreements and customer assistance agreements are also available.
Contact your nearest ODA Technologies. Sales and Service office for further information on
ODA Technologies. full line of Support Programs. Refer to below information.
www.odacore.com
[email protected]
82-2-1800-8644
Waste Electrical and Electronic Equipment
The affixed product label (see right) indicates that you must not discard
this electrical/electronic product in domestic household waste. Do not
dispose in domestic household waste. To return unwanted products,
contact our local ODA distributors, or call us for more information.
Manual Editions
Manual Part Number: 018OPS-2.0 Edition 2, February, 2018 Printed in ROK
Reprints of this manual containing minor corrections and updates may have the same printing date.
Revised editions are identified by a new printing date.

Safety Notices
The following general safety precautions must be observed during all phases of operation of this
instrument. Failure to comply with these precautions or with specific warnings or instructions elsewhere
in this manual violates safety standards of design, manufacture, and intended use of the instrument.
ODA Technologies assumes no liability for the customer's failure to comply with these requirements.
understood and met.
of flammable gases or fumes.
Do not operate the instrument in the presence
Do Not Operate in an Explosive Atmosphere
is not customer accessible.
rofrepyltcerroctonfi,tahtekilehtro"slobmySytefaS" med or
adhered to, could result in personal injury or
The instrument contains an internal fuse, which notice until the indicated conditions are fully
removing the instrument cover.
the power cable and any external circuits before
remove instrument covers. Always disconnect
are aware of the hazards involved should
Only qualified, service-trained personnel who
Do Not Remove the Instrument Cover
Fuses death. Do not proceed beyond a WARNING
Make all connections to the unit before WARNING
applying power. Note the instrument's A WARNING notice denotes a hazard. It calls
external markings described under attention to an operating procedure, practice,
of important data. Do not proceed beyond a
hazard that could result in personal injury. CAUTION notice until the indicated conditions
Verify that all safety precautions are taken.
CAUTION
Before Applying Power are fully understood and met.
(safety ground) at the power outlet. Any attention to an operating procedure, practice, or
interruption of the protective (grounding) the like that, if not correctly
p
erformed or adhere
d
conductor or disconnection of the protective to, could result in damage to the product or loss
earth terminal will cause a potential shock
A CAUTION notice denotes a hazard. It calls
In Case of Damage
Instruments that appear damaged or defective
chassis and cover must be connected to an qualified service personnel.
electrical ground. The instrument must be
connected to the ac power mains through
a grounded power cable, with the ground
Do not install substitute parts or perform any u
nauthorized modification to the product. Return
the product to an ODA Sales and Service Office
for service and repair to ensure that safety
Ground the Instrument
This product is a Safety Class 1 instrument
(provided with a protective earth terminal).
wire firmly connected to an electrical ground
features are maintained.
General Do Not Modify the Instrument
Do not use this product in any manner not
To minimize shock hazard, the instrument unintended o
p
eration until they can be re
p
aired b
y
specified by the manufacturer. The protective
features of this product may be impaired if it is
used in a manner not specified in the operation
instructions.
should be made inoperative and secured against

Safety Symbol
Out position of a bi-stable
push switch Caution, risk of electric shock
Caution, hot surface Caution, refer to accompanying
documents
ylppusffOylppusnO
Standby supply. Unit is not
completely disconnected
from ac mains when switch
is off
In position of a bi-stable push
switch
Direct current
Earth (ground) terminal
Frame or chassis terminal
Protective earth ground terminal.
Alternating current
Both direct and alternating current Three phase alternating current
Terminal is at earth potential.
Neutral conductor on
permanently installed
equipment
Line conductor on
permanently installed equipment.

CONTENTS
6
1-1. Feature 6
General Feature
Remote Interface
1. General Information --------------------------------------
---------------------------------------------
-
R
emo
t
e
I
n
t
er
f
ace
Calibration
Factory Option
Cycling Mode
Self Testing
1-2. Accessories and Options 7
Accessories
Oti
-
---------------------------------
O
p
tions
1-3. Check 8
Instrument Check
electrical Check
1-4. Operating Conditions 8
------------------------------------------------
-
-
-------------------------------------
-
1-5. Check Before Power On 9
Output Terminal check
Power Cord check
Input Power Line Check
1-6. Check After Power O
n
11
Display Procedure on the LCD
Default Setting Values
-
-------------------------------------
-
-----------------------------------
-
D
e
f
au
lt
S
e
tti
ng
V
a
l
ues
1-7. Installation 12
Cooling
Bench Operation
Rack Mounting
-
---------------------------------------------
-
2. Front Panel, Rear Panel Composition & Function 14
2-1. Front Panel Voltage & Current Setting 17
2-2. Display & Condition Indicator LAMP 18
2-3. Rear Panel Composition 19
2-4. Output Check 20
Voltage Output Check
-
-----------------------------------
-
-
------------------------
-
-
---------
-
-
----------------------
-
-------------------------------------------
-
gp
Current Output Check
- 2 -

3. Front Panel Operating-------------------------------------- 21
Over view
3-1. Constant Voltage Operating(CV) 22
3-2. Constant Current Operating(CC) 23
3
-
3 Remote Voltage Sensing
24
-
---------------------------
-
-
---------------------------
-
-----------------------------------
-
33
.
Remote
Voltage
Sensing
24
CV Regulation
Output Rating
Output Noise
Stability
Connecting Remote Voltage Sensing
3-4. Programming Over Voltage Protection(OVP) 26
3 5 Programming Over Current Protection(OCP)
29
-----------------
-
3
-
5
.
P
rogramm
i
ng
O
ver
C
urren
t
P
ro
t
ec
ti
on
(OCP)
29
3-6. I/O Config & LOCAL 31
RS232C Setting
RS232C Setting(Option)
GPIB Setting
GPIB Setting(Option)
3
-
7 KEY LOCK
36
-----------------
-
--------------------------------------
---------------------------------------------
-
37
.
KEY
LOCK
36
3-8. STORE / CALIBRATE 37
3-9. RECALL / FACTORY 38
3-10. OUTPUT ON/OF
F
38
3-11. V/I & LMT DISPLAY 39
V/I Function
LMT DISPLAY Function
--------------------------------------
--------------------------------------
--------------------------------------
----------------------------------------
-
LMT
DISPLAY
Function
3-12. CYCLING MODE 40
Feature
Preparing Record Table
STEP
STEP Setting
SEQUENCE
SEQUENCE Number input
----------------------------------------
-
SEQUENCE
Number
input
REPEAT
REPEAT input
RUN / STOP
RUN / STOP Proceed
3-13. ERROR 47
ERROR Check
------------------------------------------------
-
3-14. ESC 47
---------------------------------------------------
- 3 -

4. CALIBRATION 48
4-1. Function 48
4-2. Preparing for Detailed Setting ------------------------------
-
48
4-3. Required Efficiency for Detailed Settin
g
49
4
-
4 Calibration Technique
49
------------------------------------------------
-
---------------------------------------------
-
-
--------------------------------------
-
----------------------
-
44
.
Calibration
Technique
49
Instrument Connection
Electronic Load
Current-Monitoring Resistor(shunt)
DVM(Digital Volt Meter)
Programming
Positioning
Calibrating
L
ocation
Positioning
Calibrating
Location
4-5. Calibration Using Front Panel 51
CALIBRATE KEY Structure
CALIBRATE Setting Area
Voltage CALIBRATE Operating
Current CALIBRATE Operating
4-6 Calibration(for GPIB) Using REMOTE INTERFAC
57
-
---------------
-
---------------------------
-
4
-
6
.
Calibration(for
GPIB)
Using
REMOTE
INTERFAC
57
Conneting Instrument
Remote Calibration Command Sequence
Voltage CALIBRATE Operating
Current CALIBRATE Operating
5 FACTORY
59
-
---------------
-
5. FACTOR
Y
59
5-1. Feature 59
5-2. FACTORY KEY Structure 59
5-3. CYCLING CLEAR 59
CYCLING CLEAR Operating
5-4. USER-MEM CLEAR 60
------------------------------------------------
-
-
-----------------------------------
-
-
--------------------------------------
------------------------------------------------
-
----------------------------------------
-
USER-MEM CLEAR Operating
5-5. CALI-RESTOR
E
61
CALI-RESTORE Operating
5-6. CALI-BACKUP 62
CALI-BACKUP Operating
-------------------------------------------
-
-------------------------------------------
-
- 4 -

6. SCPI Command
s
63
6-1. Commands Synta
x
63
6-2. Commands 63
----------------------------------------
-
-------------------------------------------
-
---------------------------------------------
-
Output Setting Commands
Measurement Commands
Calibration Commands
Factory Commands
System Commands
6-3. Apply Comman 65
6
-
4. Output Voltage & Current & Operating Commands
65
-
------------
-
-------------------------------------------
-
64
.
Output
Voltage
&
Current
&
Operating
Commands
65
6-5. Measure Commands 69
6-6. Calibration Comman
d
70
6-7. Factory Comman
d
71
6-8. System Command 71
-
----------------------------------------
-
-
----------------------------------------
-
-
-------------------------------------
-
-
-------------------------------------
-
7. Error Messages 75
7-1. Running Error 75
7-2. Hardware Error 75
7-3. Remote Calibration Erro
r
76
7-4. Cycling Mode Err
o
77
7 5 Calibration Error
77
-----------------------------------------
-------------------------------------------
-
-
----------------------------------------
-
-------------------------------------------
-
-----------------------------------
-
-
-------------------------------------------
-
7
-
5
.
C
a
lib
ra
ti
on
E
rro
r
77
7-6. Fixed Memory Check Error 78
7-7. Interface Commands Error 78
8. Option 80
----------------------------------------
-
--------------------------------
-
--------------------------------
-
-------------------------------------------
-
8-1. Analog Input 80
8-2. Rear Output 81
9. Specifications 82
-------------------------------------------
-
-------------------------------------------
-
-------------------------------------------
-
10. Caution 85
------------------------------------------------
-
- 5 -

1. General Information
1-1. Feature
ODA Technologies's OPS-Series are high efficiency, high performance programmable DC power supply
RS232C & GPIB(IEEE-488.2) interface based on SCPI (Standard Commands for Programmable
instrument) protocol In addition It is designed to be equipped in 3U
*
19inch Half
-
Rack
instrument)
protocol
.
In
addition
,
It
is
designed
to
be
equipped
in
3U*19inch
Half-Rack
.
General Functional Features
▌Simple setting using jog & shutttle.
▌Output voltage, current block & restore function (Output ON/OFF)
▌Front panel's key lock function
▌Caution alarms on events
▌Hi h & Hi h li it f l ti
▌
High accuracy & High limit of resolution
▌Built-in Remote Sensing for Load Voltage(V-Sensing)
▌Over Voltage Protection(O.V.P) / Over Current Protection(O.C.P) Secure Function
▌Excellent Load Regulation & Line Regulation
▌Operating condition(Voltage,Current,OVP,OCP) Store & Recall up to 10 slots.
▌Store Error message (up to 10 messages)
▌3U * 19inch Half-Rack compatible
Remote Interface Features
▌GPIB(IEEE-488.2) & RS232C Interface
▌SCPI(Standard Commands for Programmable Instruments) compatible
▌High speed setting & measument
▌plenty of Commands equipped
▌Simple interface setting using front panel I/O config
▌Insulation with instrument & Floating Logic realization
▌Insulation
with
instrument
&
Floating
Logic
realization
▌SCPI programming grammatical order check options equipped
Calibration Features
▌adopted Software Calibration do not requires inside correction
▌Simple calibration operating using Independence or PC Interface
Factory Function Features
▌Initialization memory function up to 10 memories
▌Initialization mamory function up to 100 cycling mode memories
▌Calibration restoration function
▌Calibration back up function
Cycling mode Features
▌Operating realization by instrument itself
▌Safe storation used by permanent memories
▌Store Voltage Current Slope time Delay time each step up to 100 slots
▌Store
Voltage
,
Current
,
Slope
time
,
Delay
time
each
step
up
to
100
slots
▌Cycling mode tests available using sequence panel
Self Test Features
▌Front panel Test ▌ADC H/W Error Test
▌Remote interface Test ▌UnRegulated condition Test
▌
Memory data verification Te
s
▌ADC/DAC Calibration verification Test
- 6 -

1-2. Accessories and Options
Accessories
▌1 Power Cord
▌Output load (+), (-) 1 each. (Part number : OE-LW-BCW-2.0)
▌2 pcs metal short-bar for voltage sensing. (Part number : OM-S20)
▌1 User's Manual
▌DEMO Software CD (Windows application manual included)
Option
▌GPIB Module
▌GPIB Calbe 1M, 2M, 4M
▌RS232C Cable 1M, 2M, 4M, 10M
▌100V ± 10% , 50~60Hz AC input power
▌115V ± 10% , 50~60Hz AC input power
▌230V ± 10% , 50~60Hz AC input power
▌Rear output
▌Rack mount support
▌Block system when it is overlapped.
Function that blocks Volta
g
e
/
Current in "**OUTPUT OFF**" Mode.
Function
that
blocks
Voltage/Current
in
OUTPUT
OFF
Mode
.
- 7 -

1-3. Check
When you receive your power supply, inspect it for any obvious damage that may have
occurred during shipment. If any damage is found, notify the carrier and the nearest ODA
Sales Office immediately. Warranty information is shown in the front of this manual. Keep
the original packing materials in case the power supply has to be returned to ODA
Technologies in the future If you return the power supply for service attach a tag
Technologies
in
the
future
.
If
you
return
the
power
supply
for
service
,
attach
a
tag
identifying the owner and model number. Also include a brief description of the problem.
Mechanical Check
▌Check the broken key, encoder switch, power switch.
▌Check the broken output terminals.
▌Check the panel surfaces are free of dents and scratches
▌Check
the
panel
surfaces
are
free
of
dents
and
scratches
.
▌Check the cabinet is free of scratches.
▌Check the LDC display is not scratched or cracked.
Electrical Check
▌When turning on the power it shows instrument model and ODA website at first
▌Wh
en turn
i
ng on t
h
e
p
ower,
i
t s
h
ows
i
nstrument mo
d
e
l
an
d
ODA
we
b
s
i
te at
fi
rst.
▌Check the model Number is matched with displayed model number.
▌After, it shows "**OUTPUT OFF**" message, verifies to a high level of confidence
that the power supply is operating in accordance with its specifications.
Service Center : 82-32-623-5454
Home page : www.odacore.com
Note
1-4. Operating Conditions
This instrument is designed for following environmental conditions in other to use
optimized condition
▌Environment Temperature : 0 ∼ 40℃
▌
Relative Humidit
y
: Less than 80%
▌Relative
Humidity
:
Less
than
80%
▌Operating Altitude : Less than 2000m
▌No Vibration
▌Avoid Electric Magnetic Field
- 8 -

1-5. Check Before Power On
Output Terminal Check
▌Check the front panel two fixed outputs two variable output terminals and GND terminal.
<Diagram 1-1>
Floating the power supply output more than ±60 Vdc from the chassis presents an
electric shock hazard to the operator
WARNING
Metal Short-bar
electric
shock
hazard
to
the
operator
.
If metal short bar that is su
pp
lied from our com
p
any excluded, maximum ±240Vdc out
p
ut c
a
floated. Please make sure that there should be no contact between insulated out
p
ut termin
a
and the worker
WARNING
and
the
worker
.
<Diagram 1
-
2>
insulate-bar
<Diagram
12>
- 9 -

Power Cord Check
▌Your power supply is equipped with a 3-wire grounding type power cord; the third
conductor being the ground. The power supply is grounded only when the powerline
cord is plugged into an appropriate receptacle. Do not operate your power
supply without adequate cabinet ground connection.
Input Power Line Check
▌You can operate your power supply from a nominal 198~242 V single phase ac
power source at 47 to 63 Hz. AC100V, 110V, 115V, 230V input power is optional.
Refer to chapter "1-2. Accessories & Options"
▌In other to prevent the instrument severe damage from overload fuse is installed
▌In
other
to
prevent
the
instrument
severe
damage
from
overload
,
fuse
is
installed
in inlet case. If the fuse is also repeatedly when power turns on, check the
input power line or broken braker and then call to nearest ODA Technologies A/S Center
Input power connection is following.
<Diagram 1-3>
- 10 -

1-6. Check After Power On
When turning on the power switch, the front-panel display will light up briefly while the
instrument performs its power-on default value setting. And also keep the ex-remote
interface setting mode, voltage value is zero and current value is max value.
OVP & OCP will be set on maximum output value.
Display Procedure on LCD
▌Homepa
g
e "WWW.ODACORE.COM" will be displayed.
Visit our homepage and we will provide various service and info about upgrading, manual and software.
▌Also, Front lamp OVP, OCP, LOCK, RMT will be all lighted.
CV & CC are not included.
▌"INITIALIZING. . ." Message will be displayed.
There will be a reset using non-volatile memory.
▌Also, Front lamp OVP, OCP, LOCK, RMT lights will be turned off.
CV & CC are not included.
▌"SELF-TESTING. . ." Message will be displayed.
While self-testing, message below will be displayed.
Ch k F t l' ti
Ft lTt
Check Front panel's connection
Remote interface Test Check Remote interface for PC network
Memory data verification Test Check Instrument's info & setting
ADC H/W error Test Check ADC controlling
UnRegulated condition Test Check Output voltage Floating
ADC/DAC Calibration Test Check ADC & DAC Calibration Data
When an error occurs, there will be a alarm sound from instrument, and error No will be stored.
Front panel Tes
t
Press Key to check error code.
Please read “7. Error Messages” to check details about error code.
Default Setting Value
▌OVP : OVP Max value, OVP setting ON ▌Remote Interface : maintain previous setting
▌OCP : OCP Max value, OCP setting ON ▌Condition after Self-testing : "**OUTPUT OFF**"
▌Output Voltage : 0V
▌Cursor Location : Default Voltage Select
▌Output
Voltage
:
0V
▌Cursor
Location
:
Default
Voltage
Select
▌Output Current : Limit setting max value Voltage : 1V scale
▌KEY LOCK : OFF Current : 5A > 100mA scale
50A > 1A scale
The RS232C is attached in the instrument when the power supply is shipped from the
Note1
pppypp
factory for remote interface configuration and baudrate is set 9600bps at first time.
In case of choosing RS485 interface, address no. is 05 when this is shipped from the factory.
It has the option function that is last setup stated memory & recall. This function, when you
turn down the instrument, the device store the last state(voltage, current and state) and after
then the operator turn on again this starts from last state
Note2
t
h
en t
h
e operator turn on aga
i
n, t
hi
s starts
f
rom
l
ast state.
- 11 -

1-7. Installation
Cooling
▌The power supply can operate without loss of performance within the
temperature range of 0 °C to 40 °C, and with derated output current from
40 °C to 55 °C A fan cools the power supply by drawing air through the rear
40
°C
to
55
°C
.
A
f
an coo
l
s t
h
e
p
ower su
ppl
y
b
y
d
raw
i
ng a
i
r t
h
roug
h
t
h
e rear
panel and exhausting it out the sides. Using an ODA rack mount will not
impede the flow of air.
Draft
<Diagram 1-4 Bottom view>
Bench Operation
▌Your power supply must be installed in a location that allows sufficient space
▌Y
our
p
ower su
ppl
y mus
t
b
e
i
ns
t
a
ll
e
d
i
n a
l
oca
ti
on
th
a
t
a
ll
ows su
ffi
c
i
en
t
s
p
ace
at the sides and rear of the power supply for adequate air circulation.
Rack Mounting
▌It is designed to be compatible in 3U * 19inch, please desort bumper (diagram below)
<Diagram 1-5>
- 12 -

▌It is convenient to equip OM-3U19-FS(Option) supported by Power Supply indenpence
on the rack.
<Diagram 1-6>
▌It is convenient if you equip power supply double on a rack with OM-3U19-FD(option).
<Diagram 1-7>
▌It is simpler to use instrument if you use inside cabinet & slider OM-3U19-SS(Option).
<Diagram 1-8>
- 13 -

2. Front Panel, Rear Panel Composition & Function
114
215
316
417
518
6
19
Restore memor
y
save slot or Factor
y
Ke
y
Store
p
resent condition or Calibration K
e
LOCK Key
I/O CONFIG or LOCAL Key
Over Current Protection Key
Over Voltage Protection Key Error message Display Key
Menu Escape Key
Voltage/Current Cursor or Menu Key
Main Power ON/OFF Switch
Remote V+ Sensing Input terminal
+ out
p
ut terminal
6
19
720
821
922
10
11
12
13
Restore
memory
save
slot
or
Factory
Key
Choice Voltage/Current or Limit Dis
p
lay
K
Earth GND terminal Voltage/Current/Numbering Encorder Sw
i
Cycling mode's STEP setting Key
Cycling mode's Sequence control Key
Cycling mode's repeating Key
C
y
clin
g
mode's RUN
/
STOP Ke
y
+
output
terminal
- output terminal
Remote V- Sensing Input terminal
Output Voltage/Current ON/OFF
13
Cycling
mode s
RUN/STOP
Key
- 14 -

1. Over Voltage Protection Key
Over voltage protection function. On/Off selectable, able to change OVP Level value.
2. Over Current Protection Key
Over current protection function. On/Off selectable, able to change OCP Level value.
3. I/O CONFIG or LOCAL Key
Configures the power supply for remote interfaces. Set baudrate of RS232C. If remote
interface is RS485, it can be used for setting baudrate & address. Also under Remote Interface
situation, in other to recover bench top using, this key operate to local from remote.
4. LOCK Key
Lock/Unlock Key on the Front panel
yp
5. Store current condition or Calibration Key
Store Voltage, Current, OVP / OCP Setting value. Press Power button while holding this key. Th
i
lead you in Calibration mode, voltage/current Calibration.
6. Memory save slot restoration or Factory Key
Saved Voltage, Current, OVP/OCP Setting value can be a
pp
lied to instrument. Press Power but
t
while holding this key. This will lead you in Factory mode, which allows you to restore or reset
calibration.
7. Output Voltage/Current ON/OFF
Enables or disables the power supply output. This key toggles between on and off.
8. Voltage/Current select or Limit Display Key
Shows voltage and current limit values on the display and allows knob adjustment for setting
limit values.
9. Voltage/Current Cursor or menu changing key
Move the blinking digit to the left. In the menu mode, it can change menu tree.
Under the **OUTPUT OFF** mode, this key work on recall key.
10. Cycling mode's STEP setting Key
Appoint 1~100 slots, Set Voltage, Current, Slope Time and Delay Time.
11. Cycling mode's Sequence control Key
Setting repeating panels from ( )slot to ( )slot.
12. Repeating setting key of Cycling mode
Setting No. of repetition.
13. Cycling mode's RUN/STOP Key
Operate or Cancel Cycling mode after setting 10 → 11 → 12.
- 15 -

14. Error message Display Key
When error occurs from Self-testing, Alarm sound will come out from the instrument, and will b
up to 10 memories slot
15. Menu Escape Key
Canceling while in the Menu.
g
16. Voltage/Current Cursor or menu changing Key
Move the blinking digit to the left.
In menu mode, it can change menu tree.
Under the "**OUTPUT OFF**" mode, this key work on store key.
17. Voltage/Current Cursor or menu changing Key
gggy
Move the blinking digit to the left.
In menu mode, it can change menu tree.
Under the "**OUTPUT OFF**" mode, this key work on store key.
18. Main Power ON/OFF Switch
This switch allows to disable AC Power.
19. Remote V+ Sensing input terminal
+ Output Voltage sensing input terminal
20. + Output terminal
+ Output terminal.
21. - Output terminal
- Output terminal.
22. Remote V- sensing input terminal.
- Output Voltage sensing input terminal.
23. Earth GND terminal
GND terminal, it is able to connect to earth terminal of the DUT
- 16 -

2-1. Front-Panel Voltage & Current Setting
Use the method below to change limit value of voltage and current.
1. Check "**OUTPUT OFF**" When the instrument turned on
2. Press V/I & LMT DISPLAY key to switch Limit Mode.
3. Press key to select Voltage and Current
4. To select incresing or decreasing digit, press or and position cursor key.
5. In other to increase limit value, turn the encoder clockwise.
In other to decrease limit value, turn the encoder anti-clockwise.
6. Confirm the change of setting value at VFD Display
7. In other to output the setting voltage & current, press key.
If there is a problem in "Self-test" Press key to confirm the error code.
Please check "7. Error Messages" for Error code.
Note1
When press key, disappear the message of "**OUTPUT OFF**" and then change to limit
display state, and cursor is blinking. At that time, if let the display time-out after 3 seconds,
**OUTPUT OFF** display at the LCD.
Note2
If it is under remote control, key and encoder switch on the front panel won't operate.
If turning to local mode from remote control, press key to change to local mode.
Note3
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