ODA LF Series User manual

www.odacore.com
Programmable DC Electronic Load
LF Series
User Manual
Manual Part NO. 018LF-1.0.1

Legal Notices
© ODA Technologies Co., Ltd. 2008
No part of this document may be photocopied, reproduced, or translated to another language without
the prior agreement and written consent of ODA Technologies Co., Ltd. as governed by Republic of
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]
[phone]
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: 018LF-1.0.1 Edition 13, July, 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.
the power cable and any external circuits before
removing the instrument cover.
Do Not Remove the Instrument Cover
Only qualified, service-trained personnel who
are aware of the hazards involved should
remove instrument covers. Always disconnect
is not customer accessible.
understood and met.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence
of flammable gases or fumes.
external markings described under
attention to an operating procedure, practice,
"Safety Symbols"
or the like that, if not correctly performed or
adhered to, could result in personal injury or
Fuses
death. Do not proceed beyond a WARNING
The instrument contains an internal fuse, which
notice until the indicated conditions are fully
hazard that could result in personal injury.
CAUTION notice until the indicated conditions
Before Applying Power
are fully understood and met.
Verify that all safety precautions are taken.
Make all connections to the unit before
WARNING
applying power. Note the instrument's
A WARNING notice denotes a hazard. It calls
wire firmly connected to an electrical ground
A CAUTION notice denotes a hazard. It calls
(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 performed or adhered
conductor or disconnection of the protective
to, could result in damage to the product or
earth terminal will cause a potential shock
of important data. Do not proceed beyond a
To minimize shock hazard, the instrument
unintended operation until they can be repaired by
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
CAUTION
instructions.
features are maintained.
Ground the Instrument
In Case of Damage
This product is a Safety Class 1 instrument
Instruments that appear damaged or defective
(provided with a protective earth terminal).
should be made inoperative and secured against
General
Do Not Modify the Instrument
Do not use this product in any manner not
Do not install substitute parts or perform any
specified by the manufacturer. The protective
unauthorized modification to the product. Return
features of this product may be impaired if it is
the product to an ODA Sales and Service Office
used in a manner not specified in the operation
for service and repair to ensure that safety

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

1-1. Feature ----------------------------------- 1
General Feature
Remote Interface
Calibration
Factory Function
1-2. Accessories and Options ----------------------------------- 2
Accessories
Options
----------------------------------- 3
Mechanical Check
Electrical Check
1-4. Operating Conditions ----------------------------------- 3
1-5. Check Before Power On ----------------------------------- 4
Power Cable
AC Input Power
1-6. Check After Power On ----------------------------------- 4
Displayed proceduer on LCD
Default Setting Values
1-7. Installation ----------------------------------- 5
Cooling
Bench Operation
Rack Mounting
2-1. Front Panel ----------------------------------- 6
2-2. Rear Panel ----------------------------------- 10
1. General Information
1-3. Product Inspection
2. Configuration of Front Panel and Rear Panel
CONTENTS

Overview ----------------------------------- 12
3-1.CC MODE ----------------------------------- 14
MODE SET
Current Setting
Change LCD Display
3-2.CV MODE ----------------------------------- 17
MODE SET
Voltage Setting
Change LCD Display
3-3.CR MODE ----------------------------------- 20
MODE SET
Resistance Setting
Change LCD Display
3-4.CP MODE ----------------------------------- 23
MODE SET
Watt Setting
Change LCD Display
3-5.ON/OFF MODE ----------------------------------- 26
MODE SET
Setting Value (ON Current, ON TIME, OFF TIME, ON/OFF REPEAT)
Change LCD Display
3-6.FUSE MODE ----------------------------------- 29
MODE SET
Setting Value (FUSE Current, FUSE TIME)
Change LCD Display
3-7.BAT MODE(BATTERY) ----------------------------------- 32
MODE SET
Setting Value (BAT MODE, END VOLT, END CAP)
Change LCD Display
3-8.CYC MODE(Cycling) ----------------------------------- 35
Setting Value (FINISH STEP, REPEAT, MODE, STEP VALUE, STEP DELAY)
CYC RUN/STOP
Change LCD Display
3. Operating Front-Panel

3-9.DYN MODE(Dynamic)
------------------------------
40
Setting Value (MODE, A VALUE, B VALUE, DYN CYC TIME, A DUTY)
DYN RUN/STOP
Change LCD Display
3-10.CC,CV RANG
------------------------------
46
3-11.IO/LOCAL
------------------------------
47
RS-232C
RS-485
TCP/IP
3-12.ESC/ERR/PROT
------------------------------
54
3-13.SAVE/RECALL, KEY LOCK
------------------------------
56
3-14.REMOTE Voltage
------------------------------
58
3-15.SHORT
------------------------------
59
4. CALIBRATION
4-1. Features
------------------------------
60
4-2. Preparation for Calibration
------------------------------
60
4-3. Equipment required for Calibration
------------------------------
61
4-4. Measurement Techniques
------------------------------
61
Instruments Connection Drawing
Power Supply
Current-Monitoring Resistor(shunt)
DVM(Digital Volt Meter)
4-5. Calibration Using Front Panel
------------------------------
63
Current Calibration
Voltage Calibration
4-6. Calibration Using Remote Interface
------------------------------
69
Current Calibration
Voltage Calibration

5. FACTORY
5-1. Feature ----------------------------- 72
5-2. Structure of FACTORY KEY ----------------------------- 72
5-3. USER-MEM CLEAR ----------------------------- 73
5-4. CAL_RESTORE ----------------------------- 74
5-5. CAL_BACKUP ----------------------------- 75
5-6. CAL_DEFAULT ----------------------------- 76
5-7. LOAD_DEFAULT ----------------------------- 77
5-8. DELIMITER_CHAR ----------------------------- 78
5-9. COM_RESPONSE ----------------------------- 79
5-10. AOUT_KEY_LOCK
----------------------------- 80
5-11. ADC_SAMPLING ----------------------------- 81
6-1. Commands Syntax ----------------------------- 82
6-2. Commands ----------------------------- 82
7-1. Operating Error ----------------------------- 100
7-2. Hardware Error ----------------------------- 100
7-3. Remote Calibration Error ----------------------------- 100
6. SCPI Command
7. Error Messages

7-4. Calibration Error ----------------------------- 102
7-5. Nonvolatile Memory Check Error ----------------------------- 103
7-6. Interface Commands Error ----------------------------- 104
-----------------------------
8. Cautions
106

LF Series is a high performance, high efficiency programmable electronic load
to SCPI(Standard Commands for Programmable Instruments) Protocol.
General Features
▌Easy-to-use knob control settings
▌Big size 2Line 16Char LCD Display
▌Input ON/OFF
▌Front panel Key Lock function
▌Alram beep when events occur
▌Excellent precise and high resolution
▌Built-in Remote Sensing for Load Voltage(V-Sensing)
▌O.V.P / O.P.P / O.T.P / O.C.P
▌Excellent load and line regulation
▌Memory save and recall function(up to 10 operation states)
▌Save and confirm up to 10 error messages
▌2U * 19inch half Rack Compact Size(300W, 600W)
Remote Interface
▌RS232C, RS485, TCP/IP(Option)
▌SCPI(Standard Commands for Programmable Instruments) adopted
▌High speed setting & measument
▌A large number of commands are programmed in product.
▌Easy interface setting using I/O config on front panel
▌Technical realization of products insulation & Floating Logic.
▌Built-in checking SCPI programming grammar error system
Calibration
▌Adopting Software Calibration (No need to internal calibrate)
▌Easy calibration operating by itself or PC Interface
Factory Function
▌Initializing 10 user memories
▌Last state memory store and recall function (output on/off, voltage & current value and etc.).
▌Auto Key Lock to prevent operator error
▌Calibration Restoration
▌Calibration Backup
which has RS-232C, RS-485, TCP/IP(Option) interface that is equivalent
- 1 -
1-1. Feature
1. General Information

Accessories
▌1.5M Output cable 1 pc
▌Rack mount
▌User's Manual 1 pc.
Options
▌RS232C Cable 1M, 2M, 4M
▌RS485 Cable 2/4/8-Channel 1M, 2M, 4M, 10M
▌AC Input Cable (Special order type)
▌Output Cable (Special order type)
1-2. Accessories and Option
- 2 -

When you receive your electric load, 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 the manual.
Keep the original packing materials in case the electric load has to be returned to ODA
Technologies in the future. If you return the electric load 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 panel surfaces are free of dents and scratches.
▌Check the broken rear output terminals.
▌Check the cabinet is free of scratches.
▌Check the LCD display is not scratched or cracked.
Electrical Check
▌Initial Display message is ODA Technologies and Model Name.
▌If "**OFF-ISET**" Message is displayed, Please check other specifications.
Service Center : 82-32-623-5454
Home page : www.odacore.com
This instrument is designed for following environmental condition for using optimized condition.
▌Environmental Temperature : 0 ∼ 40℃
▌Relative humidity : ≤80%
▌Operating Altitude : ≤2000m
▌No vibration
▌Avoid the electric magnetic field.
Note
1-4. Operating Conditions
- 3 -
1-3. Inspecting the Unit

Power Cord Check
▌Provided power cord is 3-wire ground type.
If you use power cord from other brand, use Ground type.
And connect the power supply earth to load's GND.
AC Input Power Check
▌The product is designed for single phase AC110/220V (Changing switch) ±10% / 50~60Hz.
You can choose 3 phase AC Input or other options additionally.
※ Before power on, check the switch on the bottom of the product (Default: AC220V)
Turn on the power and load will be set in the previous setting value.
Displayed procedure on LCD
▌All icons on LCD and segments will light up
▌"ODA Technologies" is displayed on line 1
▌"The model name of LF-Series" is displayed on line 2.
▌During displaying above procedure, the instrument is initialized by stored in
non-volatile memory.
Default Setting Values
▌Remote Interface RS-232C 9600bps
▌BAT END VOLT 1V, END CAP 6550AH
▌CC,CV,CP MODE VALUE: 0 ▌DYN DUTY: 50%
▌CR MODE Value: LF300-A 10Ω ▌DYN-CYCLING TIME: 0.0001s
▌CC,CV Range: HI Range ▌DYN A,B VALUE 0
▌KEY LOCK : OFF ▌CYC STEP VALEU 0
▌BAT MODE CC ▌CYC Finish STEP100
▌TIME: 100mS (ON/OFF TIME, CYC STEP TIME, FUSE TIME)
▌REPEAT: 1(CYC REPEAT, ON/OFF REPEAT)
When rebooting, it reboots with setting value.
1-5. Check Before Power on
1-6. Check After Power On
Note1
- 4 -

Cooling
▌Load's quality is guaranteed in the circumstances of 0℃ ~ 40℃.
If you use this instrument in 40℃ ~ 55℃, please lower the output current to 0~70%.
When you use your electronic load on a rack, please be careful air-circulation.
You can use Rack Mounting Support as optional product.
<Figure 1-1 Bottom view>
Bench Operation
▌Load must be installed in a location that allows sufficient space at the sides, front and rear
of the unit for adequate air circulation. There is no ventilation silt on the underside.
Rack Mounting
▌This product is designed to support 2U * 19inch-Half.
You can fix product on a rack mounting provided
▌Tightly fasten Rack Mounting and Rack with bolts.
▌It would be easier If you use built-in cabinet and slider(optional product).
Note
300W, 600W: 2U *19inch-Half
900W, 1200W: 2U *19inch
1-7. Installation
- 5 -

< Figure 2-1 >
1 16Char *2Line Type LCD Display 18 INPUT ON/OFF KEY
2 CC/CV LOW RANG LCD ICON 19 MODE KEY
3 CC/CV HI RANG LCD ICON 20 DISPLAY KEY
4 INPUT ON LCD ICON 21 CC/CV RANG KEY
5 Remote Interface LCD ICON 22
IO/LOCAL KEY
6 KEY LOCK LCD ICON 23 ESC, ERROR, PROTECTION KEY
7 ERROR LCD ICON 24 SAVE/RECALL, V_SENSING KEY
8
V_SENSING ON LCD ICON
25 SHORT ON/OFF, KEY LOCK KEY
9 CYCLING MODE LCD ICON 26 CYCLING RUN/STOP KEY
10 DYNAMIC MODE LCD ICON 27 CYCLING SETING KEY
11 CP MODE LCD ICON 28
DYNAMIC RUN/STOP, Calibration KEY
12 CR MODE LCD ICON 29 DYNAMIC SETING, Factory KEY
13 CC MODE LCD ICON 30 INPUT + Terminal
14 CV MODE LCD ICON 31 INPUT - Terminal
15 Setting Encoder 32 POWER S/W
16
Right Cursor or Menu Change Key
33
17 Left Cursor or Menu Change Key 34
2-1. Front Panel
2. Configuration of Front Panel & Real Panel
- 6 -
POWER
HIGH
LOW
RMT LOCKON ERR
CV
CP
CC
CR
SYN CYC DYN
INPUT
ON/OFF
MODE
SETING &
DISPLAY
CC/CV
RANG
IO/
LOCALESC
ERR/PROT
RECALL
SAVE/
V_SENSING
ON/OFF
SHORT
RUN/STOP
CYC
SETING
CYC
RUN/STOP
DYN
SETING
DYN
CALIBRATION FACTORY
1
2
3
4 5 678 9 10
15
11
12
13
14
17 16
181920212223
24 25 26 27 28 29
30 31
32
KEY LOCK

1. 16Char * 2Line type LCD Display
Voltage/current and all kinds menu/message are displayed
2. CC/CV LOW RANG LCD ICON
lights up when CC/CV MODE RANG is low
3. CC/CV HI RANG LCD ICON
lights up when CC/CV MODE RANG is high
4. INPUT ON LCD ICON
lights up when INPUT is on
5. Remote Interface LCD ICON
When received request for remote control, this lamp lights automatically.
In this mode, you can't use other keys excpet IO/LOCAL KEY
6. KEY LOCK LCD ICON
lights up when KEY LOCK mode. In this mode you can't use any other keys
7. ERROR LCD ICON
If errors occur, the lamp lights up. When all errors are checked, the lamp goes out
8. V_SENSING ON LCD ICON
lights up when V_SENSING mode
9. CYCLING MODE LCD ICON
lights up when CYCLING MODE setting or CYCLING MODE on
10. DYNAMIC MODE LCD ICON
lights up when DYNAMIC MODE setting or DYNAMIC MODE on
11. CP MODE LCD ICON
lights up when CP MODE setting or CP MODE on
12. CR MODE LCD ICON
lights up when CR MODE setting or CR MODE on
13. CC MODE LCD ICON
lights up CC MODE setting or CC MODE on
14. CV MODE LCD ICON
lights up when CV MODE setting or CV MODE on
- 7 -

15. Setting Encoder
Set all values or change numerical value in functional menu
16. Right Cursor or Menu Change Key
Move to the right direction. After entering Menu, this is the move key
17. Left Cursor or Menu Change Key
Move to the left direction. After entering Menu, this is the move key
18. INPUT ON/OFFKEY
Enable and disable CC,CV,CR,CP,ON/OFF,FUSE,BAT MODE
19. MODE KEY
Change CC,CV,CR,CP,ON/OFF,FUSE,BAT MODE
※ CC→CV→CR→CP→ON/OFF→FUSE→BAT→CC
20. SETTING & DISPLAY KEY
When input is off, you can change SETTING PAGE in ON/OFF, FUSE, BAT mode
When all mode is on, you can change DISPLAY PAGE
21. CC/CV RANG KEY
When CC/CV MODE is off, you can change RANG of CC/CV
22. IO/LOCAL KEY
As Remote Interface setting key, you can select RS232C, RS485 and TCP/IP
In Remote Interface mode, you can change to Local Mode using this key
23. ESC, ERROR, PROTECTION KEY
Can be used as Cancellation key when press the key shortly
Can be used as Checking Error Display key when an error is occurred
When Protection Mode is on, to press and hold this key will clear protection
※ In PROTECTION mode, "PROTECTION CLEAR" will be displayed after Protection is cleared
24. SAVE/RECALL, V_SENSING KEY
Press this key shortly to enter SAVE/RECALL menu or for setting in functional menu
Press and hold this key to enable or disable V_SENSING
25. SHORT ON/OFF, KEY LOCK KEY
Press this key shortly to set MAX current when CC HI RANG MODE is ON
Press and hold this key to disable KEY LOCK Mode
26. CYCLING RUN/STOP KEY
Start or Stop CYCLING MODE
- 8 -

27. CYCLING SETTING KEY
When entering setting menu of CYCLING MODE, this is the setting key.
28. DYNAMIC RUN/STOP, Calibration KEY
After booting, this key is used to start and end DYNAMIC Mode
During booting, this key is for setting in Calibration menu and functional menu
29. DYNAMIC SETTING, Factory KEY
After booting the product, this key is used to enter DYNAMIC MODE SETING menu.
During booting, this key is for setting in Factory menu and functional menu
30. INPUT + Terminal
(+) Input terminal
31. INPUT + Terminal
(-) Input terminal.
32. POWER S/W
This switch can cut off or supply power
- 9 -

< 그림 2-2 >
1 AC Input 5 RS232C Interface Port
2 External Input/Output Terminal 6 Ventilation Slit
3 TCP/IP Interface Port(Option)
4 RS485 Interface Port
1. AC Input
Input AC voltage here.
110/220V(changeable) / 50-60Hz is default and change the value is optional.
※ Before power on, be sure to check AC switch on the bottom (Default is AC220V)
2. External Input/Output Option Terminal
1) V_Sensing + Input
2) V_Sensing - Input
3) Current Analog Output(0~10V)
4) Analog Ground
5) Firmware Upgrade Mode Set Terminal
6) Firmware Upgrade Mode Set Terminal
2-2. Rear Panel Interface
- 10 -
12 3 4
1234 5 6
1
2
3
45
6

3. TCP/IP Interface Port(Option)
Interface Port that can control the electronic load using TCP/IP communication.
4. RS485 Interface Port
It is a Communication method that can connect multiple devices(power supplier, DMM, Scope, etc.,)
in parallel to one external controller.
※ Pin Description
1) +5V (Communication Power Source) 3) D- (Data-)
2) D+ (Data+) 4) 0 (Communication Ground)
5. RS232C Interface Port
This is a Serial Port that equipped in PC.
This use 1:1 communication with external controller (PC,PLC,ETC.,)
6. Ventilation Slit
Suck the air from the side of unit forcibly and drain it from the rear
- 11 -