Keisoku Giken Electronic load Battery testing Charging test

1. Multi-Purpose
Electronic Load
Ripple &
Noise Meter
Load Station Series
300W / 1000W
RM-104
・ ・ ・ 2p
・ ・ ・ 8p
KEISOKU GIKEN Co., Ltd.
KG’s Recommended Products
CE mark
CE marking on a product is a manufacturers declaration that the products complies with the essential
requirement of the relevant European health, safety and environmental protection legislation.

2. 2 CE marking Adapted Products
｜ 3
｜
High-end multi-functional Electronic Load
Load Station Series (300W/1000W)
USB BOOSTER
■ Ordering information
Ordering No. (Model) Detail
LN-300A Electronic load 120V, 60A, 300W, 20A/μs
LN-300C Electronic load 500V, 12A, 300W, 1A/μs
LN-1000A Electronic load 120V, 180A, 1kW, 30A/μs
LN-1000C Electronic load 500V, 36A, 1kW, 3A/μs
LN-xxx(*1)/REC Test data of the electronic load
LX-OP01 GP-IB/DIDO option
LX-OP03 Master/slave connection cable
LX-RK-EIA EIA Rack mount kit for LN300/1000
LX-BP Rack mount kit blank panel for LN-300
RC-02A Ripple and noise meas. module (Factory option)
RC-02A/REC Test data of RC-02A
(*1)xxx : Name of the electronic load (*2) Factory option only
MPPT FAST
OPTION
DC
120V
DC
500V
Large 3.5inch color LCD
Memory function to recall settings
Terminal cover included only 1kW model
Flat top cover by side
mounted grip.
Multi function I/F and eight front controls for
ease of operation.
Front
Rear
Side
High-end multi-functional Electronic Load
Load Station Series(300W/1000W)
Front panel terminals
for ease of use
Tilted key top for better operation.
A rotary knob to up &
down the current value.
Self lit load ON/OFF button.
Front panel USB for one touch PC
connection.
Oscilloscope-like keys for direct commanding or
used as 10 keys for data entry.
Main power source switch
Adapted to the
Worldwide AC voltage.
Load terminals on rear
panel as well.
Booster connection.
Trigger output terminal.
External control input (Analog input).
Remote sensing input.
Remote sensing INT/EXT switch.
GPIB/DIDO interface (Optional).
Current output monitor / not isolated
(Analog out)
●
● [Revolutionary UI] Oscilloscope like operation
●
● Realized less 35% weight to previous model.
●
● [No minimum operation voltage] requirement. Works just like a resistor.
●
● High speed current control technology. [Like a magic of current]
●
● 4 models in 300W, 1000W in 125V and 500V
●
● Independent Rise time and Fall time setting from 1us (When in the dynamic CC mode)
●
● GPIB communication//PLC/DIDO control possible. (Option: LX-0P01 GPIB / DIDO interface.)
●
● Built-in ripple and noise meas. (Factory option)
High-end multi-functional Electronic Load
Ripple and noise meas. input (Optional)

3. 4 CE marking Adapted Products
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Dynamic mode of 16 steps is added to normal 2-step (Hi/Lo)
dynamic mode. This made precise current setting for various
test.
The current waveform can be set graphically on a color LCD
display. Either time or period (Frequency) display possible.
Load Station series has 1,024 words of memory for Sequence
operation. Various waveforms can be reproduced by storing
programmed data by a PC to the memory.
Same incremental period is applied commonly to all steps
from1ms min. to 1min as max.
Current(A)
Time
(msec)
Setting step1
Setting step2
Setting step 1024
Response time
(A/μsec)
Load setting
Load setting
Response time
(A/μsec)
Response time
(A/μsec)
Load setting
Load setting
Response time
(A/μsec)
Response time
(A/μsec)
Load setting
～
～
～
～
～
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8 memories
8 loading conditions (Ex. Minimum value, rated
value, maximum loading value so forth) can be
stored in the memory and recalled.
MPPT function（Factory option only）
太陽電池パネル MPPT function
MPPT feature which is used when testing solar
panels may be added to Electronic Load as an
option. Consult us before ordering.
Interface / External control
Load Station series is equipped with a USB
interface on the front panel. Optional GP-IB/
DIDO board (LX-OP01) enables connection with
GP-IB and PLC.
At the Sweep Mode, it sweeps (increment the load current
precisely at low level) load current and measures the voltage
and current values. The data is then shown as a plot on the
LCD real time.
Ex. OCP(Over current protection) of switching regulator and
I-V characteristics of rechargeable battery are tested by the
electronic load alone without using PC or program.
Switching regulator
Example of OCP test
Battery
Loading mode
CC CR CV CP EXT SHORT
Normal ○ ○ ○ ○ ○ ○
Dynamic ○ ○ ○ ○ ― ―
Sequence ○ ○ ○ ○ ― ―
Sweep ○ ○ ― ○ ― ―
*Sequence mode is set only from PC.
Ripple and noise measurement
load current
Switching
regulator
Load Station
Series
Electronic load function
+ Measurement function
(Optional)
RC-02A
Optional ripple & Noise measurement board (RC-
02A) can be added to Load Station series. RC-02A
enables high accurate DC-V as well as Ripple &
Noise measurement. This is suitable to test various
batteries. Ripple and Noise are shown on the panel
at same time.
Ripple & noise/High accuracy
DC voltage measurement With the High Speed Current Control
Technology, Load Station series realized max
30A/ μ s slew rate. (LN-1000A) The response
speed can be set through USB or on the front
panel.
＊ Setting response speed is subject to the condition
such as range.
＊ High speed Electronic load is needed when testing
DC power supply for high speed device.
Slew rate 30A/ μ s
Start loading mode
CC CR CV CP EXT SHORT
OFF ○ ○ ○ ○ × ×
CC ― × × × × ×
CR ○ ― ○ ○ × ×
CV ○ ○ ― ○ × ×
CP ○ ○ ○ ― × ×
*No switching to CC mode.
This unit is equipped with 6 types of loading mode and 4 types
of operation mode. Total 17 types of load tests are possible
by combination.
The loading mode is automatically switched at certain voltage
by the Automatic Switching Mode.
This feature is useful especially when testing chargeable
batteries to avoid over charging.
6 types of Loading mode
Our Electronic load
Current
Voltage
Below minimum
operating voltage
Conventional Electronic load
Current
Voltage
Other Electronic load
in the market
(example)
series
[No loading current below minimum operating voltage] is not
true anymore. Load Station series act as a resistive load so
the loading current is proportional to the loading voltage
from 0V.
Due to this feature, there is no delay on its loading current.
No current delay at the rising edge
200μs/div 4μs/div
Other Electronic load
in the market
(example)
series
Electronic Load may generate overshoot or ringing on the
loading current according to the condition. However Load
Station series incorporates High Speed Current Feedback
Control Technology intended to eliminate this overshoot
and realized ideal current shape.
Conventional product(300W) (300W)
10kg 6.5kg
35%Down!
About 35% lighter than our ordinary model. Only 6.5kg for
300W model.
Innovational Electronic Load - Load Station Series
Light enough to carry around No overshoot
Dynamic mode which enables precise
current waveform setting.
Convenient Sweep Mode suitable for
real time graphical display.
Sequence mode is convenient to reproduce current waveform.
*Sample software for sequence setting can be downloaded from our website.
https://www.keisoku.co.jp/pw/support/download/
Oscilloscope like user interface for ease of operation.
Intuitive operation is possible by the button image on the
LCD.
Oscilloscope like user interface
Oscilloscope (Image)
High-end multi-functional Electronic Load
Load Station Series (300W/1000W)
Options for Electronic load
RC-02A Ripple & noise measurement module (Factory option only) - CE marking unsupported
DC voltage
measurement
（INPUT）
Range ±6.0000V ±60.000V ±500.00V
Resolution 0.1mV 1.0mV 10.0mV
Accuracy *1 ±0.025% of rdg. ±0.025% of f.s.
Maximum allowable input voltage ±500V
Measurement time *2 about 100ms
Ripple and noise
voltage
measurement
（INPUT）
Range 300.0mV 3000mV
Resolution 0.1mV 1mV
Accuracy *1, 3 ±2% of rdg. ±1% of f.s.
Nominal bandwidth 100MHz(3dB)
L.F. filter 50Hz ～ 2kHz
H.F.filter 5kHz～100MHz
20MHz bandwidth limit filter 50Hz～20MHz
Ripple separation ratio *4 0.0% ～ 50.0%（It is variable by a 0.5% unit）
Measurement time *2 about 350ms
Input condition
Impedance DC(1MΩ)、High frequency(50Ω)
Cable 50Ωcoaxial cable 1.5M
Power
measurement
Measurement method*5 [V measurement x Current measurement]
DC V measurement x Current measurement about 100ms
LOAD SENS V measurement x A measurement about 200ms
*1：The specifications a guaranteed for 6 months at ambient temperature 23±5℃ & Hum70％ or less.
*2 : Measurement time within the same measurement range and mode. *3 : For frequency range of 10KHz ～
10MHz. *4：For frequency range of 10KHz ～ 100MHz. *5：Returns absolute value.
RC-02A Input connector
（BNC）
Rear Panel
RC-02A adds highly accurate DC-V measurement
and Ripple & Noise measurement feature to LN
and ELx series Electronic Load. Specify this
option when ordering. Input BCN connector is
added on the rear panel.
(Applicable to LN-300A, LN-300C, LN-1000A,LN-
1000C)
Operation
mode
Switching
mode

4. 6 CE marking Adapted Products
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Ordinary Electronic Load
do
differently!
Electronic load characteristics
(What is the unique technology?)
Current
Voltage
Leave the Load switch
ON and turn ON the
output of the DUT.
Smooth current
transition is obtained.
Turn the load ON while
the output of the DUT
has been set ON.
As it tracks voltage
from 0V so there is no
overshoot.
Smooth transition
even in dynamic mode.
Dynamic load mode
Rush current
Condition-1
Overshoot
Ringing
No Rush current
No overshoot
No Ringing
Condition-2
Condition-3
Current
Voltage
When in Ordinary E-Load
There is no current
below the minimum
operating voltage.
Current
Voltage
The current follows the
voltage proportionally
from 0V. Just like a
Resistor.
Electronic Resistor Operation
Delay
1.5V（Minimum operating voltage）
0V
DUT output
Time
Current Voltage
Current
Voltage
Soft Start Method
There is a time delay
till the voltage reaches
to the minimum
operating voltage.
As there is no time
delay, low voltage
devices can be tested
properly.
Current
Voltage
Electronic Resistor Operation
KG Load station series
Low Voltage
Operation
Technology
High speed
current
control
technology
●
● Fast slew rate ( ～ 30A/us)
●
● Variable slew rate
●
● Booster function (Parallel operation)
●
● Multi-channel triggering
●
● 7 operation modes
●
● (CC/CR/CP/CV/EXT/CV+Climit/Short)
●
● External control
●
● Protection & Alarm
●
● Sequence mode for 1,024 steps
●
● Communication (USB. GPIB is optional)
●
● Load terminals on front and back panel
●
● No time delay between current and voltage
●
● I/V curve display on UI
●
● OCP & OPP built-in test function
●
● 16 level dynamic mode
●
● Minimum 1us rise and fall time for the current
●
● Free utility software (E-load player)
●
● Compact and light weight
●
● 10 key for ease of data entry
●
● Up to 100kHz response
Major functions: Unique functions and services
Model LN-300A LN-300C LN-1000A LN-1000C
Max rate 120V, 60A, 300W 500V, 12A, 300W 120V, 180A, 1kW 500V, 36A, 1kW
Min operating voltage 1V @60A
0.5V@30A
0.2V@12A
3V@12A
1.5V@6A
0.7V@2.8A
1V@180A
0.5V@90A
0.2V@36A
3V@36A
1.5V@18A
0.7V@8.4A
Loading mode CC, CR, CV, CP, EXT, Dynamic, Short
Slew rate 20A/us 1A/us 30A/us 3A/us
Min response time > 500ns
Parallel operation
1 master unit can control multiple slave units.(Max 10 units)
Those loads to be in same voltage rating. (When the master is LN-300A, then the slaves are
either LN-300A or LN-1000A)
Measurement mode DCV, DCA, Power(Calculated), Ripple voltage(Option: RC-02A)
Interface USB & EXT analog input: Standard. GPIB & DIDO: Optional
Trigger output 0 to 5V (Photo-coupler output)
Current monitor output DC 0 to 5V (Not isolated)
Protection & Alarm OCP, OPP, OV-alarm, Over Temp Protector and Reverse connection alarm
Power requirement AC85 to 264V, 50/60Hz
Dimensions: W x H x D mm 215 × 129 × 420 430 × 129 × 450
Weight Approx: 6.5kg Approx. 13kg
Note: The specifications are subject to change without prior notice.
Switching power supply
Switching power supply
Multiple output
Each load can be set
differently but
synchronized.
Max 10 unit to synchronize.
Max 10 unit to synchronize.
USB
GP-IB
USB/GP-IB Interface
E-Load Player screen
Top screen Dynamic setting I/V characteristics screen
High-end multi-functional Electronic Load
Load Station Series (300W/1000W)
High-end multi-functional Electronic Load
Specification
Application
Remote control by PLC (Option: LXOP01)
PLC
Load alarm
Current monitor: 0 to 5V
Ext cont: 0 to 10V
Load ON / OFF
A/V range
Load ON/FF, Range Switch, Alarm control by
DIDO and Current control by analog.
Expandable up to 10 units.
Expandable up to 10 units.
Switching power supply
Parallel connection
Large capacity
Each electronic load can be
connected to expand the
loading power.
Max 10kW, 10 units.
Expansion by booster connection
Easy measurement by free software E-Load Player
Multi-channel Synchronous operation
With E-Load Player, such as I/V characteristics can be measure easily.
*USB I/F Or GPIB/IF: GPIB-USB-HS, PCI-GPIB (National Instruments)
*Only Japanese version now..

5. 8 CE marking Adapted Products
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We need easy way…
Digital Ripple & Noise Meter
RM-104
■ Ordering information
Ordering No. (Model) Detail
RM-104 Ripple & noise meter
SC-82 8-channel scanner
RMSC-10 RM-104 to SC-82 connection cable
DP-100A
Differential probe (1 set comes with RM-104 as
standard accessory)
TRC-50F2
HF termination resistor (RM-104 incorporates
same circuit)
RM-104/REC Test data of RM-104
DC
500V
It is mandatory to conduct periodic maintenance of the power supplies in industrial equipment used in power plant or
other public services.
As power supply is the key devise in the system and their system will shut off when power supply failed and will
cause serious damage to our life. Normally ripple voltage and noise voltage of the power supply are measured in the
periodic check but those are not that straightforward.
Since the measuring object is “NOISE”, reading waveforms on the oscilloscope is very complicated and good
experience is needed. However digital ripple & noise meter can discriminate them and read them accurately.
A B
C
D
E
Noise? Ripple?
Switching power supply
No hesitation
at the site!
Differential probe
DP-100
Measurement by oscilloscope
The reading result is heavily relying to the operator.
Panel operation is not simple
Need additional differential probes to measure
Do by whoever,
it is the same!
One touch simple measurement
■ Measurement by RM-104
do
differently!
■ RM-104 measures five voltages simply!
The output of switching power supply contains various kinds of waveforms and are all combined.
With RM-104, 5 different voltages can be measured easily.
Diagram of Ripple & Noise waveform
*It is possible to judge if the capacitance of the electrolytic capacitor used inside of the switching power supply is in allowable range or
not by measuring D (Switching ripple) or B (Ripple) above.
A: Ripple & noise voltage B: Ripple voltage C: Noise voltage
D: Switching ripple voltage E: AC ripple voltage
Oscilloscope is bulky
a n d n o t t h a t u s e r
friendly too….
It is very difficult to read
ripple voltage from all mixed
waveform…
Oscilloscope
Measurement by RM-104
No reading error due to digital display
One touch simple measurement
Passive type differential probe as a standard accessory
Switching power supply
Ripple & Noise Meter
RM-104
●
● Automatic measurement possible which is correlated to oscilloscope reading.
●
● Realized “One touch measurement without hesitation” by digital technology!
●
● Automatic “PASS” or “FAIL” judgment!
●
● Conforming to JEITA standard. (JEITA: Japan Electronics and Information Technology Industries Association,)
Digital Ripple & Noise Meter
Digital Ripple & Noise Meter
RM-104

6. 10 CE marking Adapted Products
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Accessories
The DP-100 reduces common mode
noise drastically then measures the
signal between two measurement points
accurately. No power to the probe is
required.
When measuring by a oscilloscope, differential probe DP-100A can be used but use TRF-50F2 HF
termination resistor as seen below. (When measuring high voltage, it may burn 50 ohm
termination resistor above inside of oscilloscope.)
TRC-50F2 HF terminator
Differential probe DP-100A TRC-50F2
Oscilloscope
Oscilloscope
When measuring Ripple & Noise with an
oscilloscope, using this 50 ohm terminator (50
ohm resistor and DC cut capacitor inclusive)
is recommended for accurate measurement
because it can reduce Noise Reflection due to
impedance unbalance. The TRC-50F2 conforms
JEITA specification.
DP-100A Differential probe
Model Description Note
DP-100A DP-100 A-type Probe comes with alligator clips
DP-100B DP-100 B type Probe without alligator clips
DP-100CM Cable with alligator clips 3-color, 10cm cables(red, black,green)
DP-100C Cable without clips 3-color 20cm cables(red, black, green)
Digital Ripple & Noise Meter
RM-104
RM-104
Digital Ripple & Noise Meter
Specification
1.DC voltage measurement
Range ± 6.0000 V ± 60.000 V ± 500.00 V
Resolution 0.1 mV 1.0 mV 10.0 mV
Measurement autorange -6.0000 V to 6.000 V
-60.000 V to -5.600 V -500.00 V to -56.00 V
5.600 V to 60.000 V 56.00 V to 500.00 V
Accuracy *5 ± 0.025% of rdg. ± 0.025% of fs
Maximum allowable input voltage ± 500 V
Measurement time *4 90msec or less (Fast Mode) / 250msec or less (Slow Mode)
2.Ripple & noise voltage measurement
Range 300.0 mVp-p 3000 mVp-p
Resolution 0.1 mV 1.0 mV
Accuracy *1, *2, *5 ± 2% of rdg. ± 1% of fs
Filter
THRU 50 Hz to 100 MHz
LF filter 50 Hz to 2 kHz
HF filter 2 kHz to 100 MHz
20 MHz band width limit 50 Hz to 20 MHz
Ripple separation ratio *3 0.0% to 50.0% (0.5% increment)
Measurement time *3, *4 approx. 170 ms
3.Interface
GP-IB Compliant with IEEE488.1
LAN *6 IEEE 802.3
USB USB2.0 compliant (Full-Speed)
OUT PORT: PASS, FAIL Photocoupler output 24V common (14 pin connector) *8
OUT PORT: Start trigger Photocoupler input 12V common common (14-pin connector) *7
OUT PORT: 4 CH output Photocoupler output 24V (for SC-82 control) *8
4. Input terminal, cable
Impedance DC 1 M Ω , high frequency 50 Ω
cable DP-100 or 50 Ω coaxial cable, 1.5 m
5.General specifications
Power supply 85 to 264 VAC, 50/60 Hz (47 to 63)
power consumption 30VA or less
Dimensions *9 180 (W) x 85 (H) x 300 (D) mm
mass 1.8 kg
Withstand voltage
Between input and output: 3000 VAC for 1 minute
Between input and FG 1,500 VAC for 1 minute
Insulation resistance Between input and FG DC500V 30M Ω or more
Operating temperature / humidity
range
0 ℃ ～ 40 ℃ 20% ～ 85% RH or less (no dew condensation)
Storage temperature / humidity
range
-20 ℃ ～ 60 ℃ 20% ～ 85% RH or less (no dew condensation)
Altitude 2000m or less
*1 The ripple separation ratio is guaranteed in the range of 0% to 10%.
*2 For the frequency range of 10 kHz to 10 MHz.
*3 Functions in the frequency range of 10 kHz to 100 MHz.
*4 Measurement time for the same measurement range.
*5 Guaranteed for 6 months at an ambient temperature of 23 ° C ± 5 ° C and humidity of 70% or less.
*6 Factory shipping option.
*7 Photocoupler input Input rating: 12V 12mA (Input resistance 1K Ω )
*8 Photocoupler output Output rating: 24V 10mA MAX
*9 External dimensions do not include interface protrusions.
- The calibration date is displayed on the screen at startup.
- Compatible with the old model RM-103.

7. ● The content of this catalog is generated based on the latest data as of Sep. 2019. ● Please consult us for the latest specification, price and availability of
the product prior to ordering. ● All brand names, product names and company name are registered trademarks of their respective companies. ● Information
in this document is subject to change without notice.
Sep. 2019 issued ● CP-0145-1909
https://www.keisoku.co.jp/en/
Power Electronics DIV. SALES DEPT.
KEISOKU GIKEN Co., Ltd.
Hiyoshi operation 4-11-1 Minamikase, Saiwai-ku, Kawasaki-city,
Kanagawa-pref. 212-0055 Japan
Tel : (+81)44-223-7950 / Fax : (+81)44-223-7960
Osaka office 4F Esaka-sekishu bldg. 15-11 Toyotsu, Suita-city,
Osaka Pref. 564-0051 Japan
Tel: (+81)6-6387-1039
Nagoya office 3F NK marunouchi bldg. 2-17-13 Marunouchi,
Naka-ku, Nagoya-city, Aichi-pref. 460-0002 Japan
Tel: (+81)52-203-0658
E-mail : PWsales@hq.keisoku.co.jp https://www.keisoku.co.jp/en/