주요 특징

• Multi-channel & individual control - Each channel is isolated and can be controlled individually.

• Low cost High performance - The CC and CR modes are standard. Addition to standard, CV and CP modes are lined up. Various models are available based on usage scenes.

• 4 points presetting - 4 sets of frequently used value can be preset.

• Key lock - Key lock function provides to hold all setting values.

• Various remote controls (user option) - It is possible to add the interface function of GP-IB or USB after purchasing as user option.

• Front input terminal (1A/3A/7A models) - The terminal is provided by factory option. (Maximum input current is 30A.)

• Maximum 12 channel in full rack size

Lineup

Specifications

Maximum Input Rating

Input voltage

LW75-151Q
LW75-151D

H current range: 75 W, L current range: 12.5 W

LW151-151D

H current range: 150 W, L current range: 25 W

LW301-151S

H current range: 300 W, L current range: 50 W

Input current

LW75-151Q
LW75-151D

H current range: 15 A, L current range: 2.5 A

LW151-151D

H current range: 30 A, L current range: 5 A

LW301-151S

H current range: 60 A, L current range: 10 A

LW301-151S
frontinput type

H current range: 30 A, L current range: 10 A

Application voltage

All models

150 V

Inputterminals

LW75-151Q

4  (Std.: rear, factoryoption: front)

LW75-151D
LW151-151D

2  (Std.: rear, factoryoption: front)

LW301-151S

1  (Std.: rear, factoryoption: front)

Constant-Current Mode

Input vol. range

All models

Rear: 1 to 150 V
front: 1.5 to 150 V

Setting range

LW75-151Q
LW75-151D

H current range: 0.000 to 15.750 A  (0 to 105% FS)
L current range: 0.0000 to 2.6250 A(0 to 105% FS)

LW151-151D

H current range: 0.000 to 31.500 A  (0 to 105% FS)
L current range: 0.0000 to 5.3000 A(0 to 105% FS)

LW301-151S

H current range: 0.000 to 63.000 A  (0 to 105% FS)
L current range: 0.0000 to 10.500 A(0 to 105% FS)

LW301-151S
front input type

H current range: 0.000 to 31.500 A  (0 to 105% FS)
L current range: 0.0000 to 10.500 A(0 to 105% FS)

Theoreticalresolution

LW75-151Q
LW75-151D

H current range: 1 mA
L current range: 0.1 mA

LW151-151D

H current range: 2 mA
L current range: 0.2 mA

LW301-151S

H current range: 5 mA
L current range: 1 mA

Setting accuracy

All models

±(0.5% SET + 0.3% FS)at 23 ±5℃ 1% FS current or more

Ripple noise

LW75-151Q
LW75-151D

H current range: 5 mA
(Actual value measured in 5 to 1MHz range)
L current range: 3 mA
(Actual value measured in 5 to 1MHz range)

LW151-151D

H current range: 10 mA
(Actual value measured in 5 to 1MHz range)
L current range: 6 mA
(Actual value measured in 5 to 1MHz range)

LW301-151S

H current range: 20 mA
(Actual value measured in 5 to 1MHz range)
L current range: 10 mA
(Actual value measured in 5 to 1MHz range)

Temperaturecoefficient

All models

100ppm/℃: time of rated current

・The constant-current circuit of the LW series has an internalreference power source for each preset. Thus, whenthe same current is set for all presets, the control current may differ withthe presets.

Constant-Resistance Mode

Input vol. range

All models

Rear: 0 to 150 V, front: 0 to 150 V

Setting rangeResistances shown on right correspond to STEP values of 3 to 30000.

LW75-151Q
LW75-151D

H current range: 1 k to 0.1 Ω L current range: 6 k to 0.6 Ω

LW151-151D

H current range: 500 to 0.05 Ω L current range: 3 k to 0.3 Ω

LW301-151S

H current range: 250 to 0.025 Ω L current range: 1.5 k to 0.15Ω

Theoreticalresolution

LW75-151Q
LW75-151D

H current range: 333．μS (= 1/3 k Ω)
L current range: 55.5 μS (= 1/18 k Ω)

LW151-151D

H current range: 66．6 μS (= 1/1.5 k Ω)
L current range: 111 μS (= 1/9 k Ω)

LW301-151S

H current range: 1.33 mS (= 1/750 Ω)
L current range: 222 μS (= 1/4.5 k Ω)

Setting accuracy

All models

±(2% Vin/Rset + 1.5% FS current)
Vin = 1.5 or more, at 23 ±5℃, set current: 10% FS current or
more

Ripple noise

LW75-151Q
LW75-151D

H current range: 5 mA
(Actual value measured in 5 to 1MHz range) L current range: 3 mA
(Actual value measured in 5 to 1MHz range)

LW151-151D

H current range: 10 mA
(Actual value measured in 5 to 1MHz range) L current range: 6 mA
(Actual value measured in 5 to 1MHz range)

LW301-151S

H current range: 20 mA
(Actual value measured in 5 to 1MHz range) L current range: 10 mA
(Actual value measured in 5 to 1MHz range)

Temperature coefficient

All models

1000ppm/℃: time of rated electric power and time of rated
current

・The resistance shown above arecalculated using thefollowing expression: Resistance=1/(theoreticalresolution x STEP)

・The constant-resistancecircuit of the LW series has an internal reference power source for each preset. Thus, when the same resistance is set forall presets, the control resistance may differ with thepresets.

・The constant-resistance circuit of the LW series switches threecircuits to execute resistance control accordingto the set steps.  Thus, the setresistance may change greatly in the setting accuracy range whenthe circuit is switched (at two points between the set steps 300 and 301 andsteps 3000 and 3001).

Constant-Voltage Mode

Setting range

All models

0.00 to 157.50 V  (0 to105% FS)

Min. operating current

All models

1% FS current

Theoretical resolution

All models

10 mV

Setting accuracy

All models

±(0.5% SET + 0.3% FS)at 23 ±5℃
Application voltage -- Front: 1.5 V or more, rear: 1 V or more

CV temperature coefficient

All models

150 ppm/℃: time of rated voltage

・The constant-voltage circuit of the LW series has an internalreference power source for each preset. Thus, whenthe same voltage is set for all presets, the control voltage may differ withthe presets.

Constant-Power Mode

Input vol. range

All models

H voltage range: 5 to 150 V L voltage range: 1 to 15 V

Setting range

LW75-151Q
LW75-151D

H current range: 3.75 to 78.75 W  (5 to 105% FS)
L current range: 0.625 to 13.12 W(5 to 105% FS)

LW151-151D

H current range: 7.50 to 157.50 W  (5 to 105% FS)
L current range: 1.25 to 26.25 W  (5to 105% FS)

LW301-151S

H current range: 15.00 to 315.00 W  (5 to 105% FS)
L current range: 2.500 to 52.500 W(5 to 105% FS)

Theoreticalresolution

LW75-151Q
LW75-151D

H current range: 10 mW L current range: 1 mW

LW151-151D

H current range: 20 mW
L current range: 2 mW

LW301-151S

H current range: 50 mW
L current range: 5 mW

Settingaccuracy

All models

±(5% SET + 2% FS)  at 23±5°C , at constant current over 5%

Ripple noise

LW75-151Q
LW75-151D

H current range: 8 mA
(Actual value measured in 5 to 1MHz range) L current range: 5 mA
(Actual value measured in 5 to 1MHz range)

LW151-151D

H current range: 16 mA
(Actual value measured in 5 to 1MHz range) L current range: 10 mA
(Actual value measured in 5 to 1MHz range)

LW301-151S

H current range: 32 mA
(Actual value measured in 5 to 1MHz range) L current range: 20 mA
(Actual value measured in 5 to 1MHz range)

Temperaturecoefficient

All models

1000ppm/°C: time of rated electric power and time of ratedcurrent

・Theconstant-power circuit of the LW series has an internal reference powersource for each preset. Thus, when thesame power is set for all presets, the control power may differ with thepresets.

Current Limitation

Setting range

LW75-151Q
LW75-151D

H current range: 0.75 to 15.75 A  (5 to 105% FS)
L current range:0.125 to 2.625 A  (5 to 105% FS)

LW151-151D

H current range: 1.50 to 31.50 A  (5 to 105% FS)
L current range:0.250 to 5.250 A  (5 to 105% FS)

LW301-151S

H current range: 3.00 to 63.00 A  (5 to 105% FS)
L current range:0.50 to 10.50 A  (5 to 105% FS)

LW301-151S
front input type

H current range: 3.00 to 31.500 A  (10 to 105% FS) L current range:0.50 to10.500 A   (5 to 105% FS)

Theoreticalresolution

LW75-151Q
LW75-151D

H current range: 10 mA L current range:1m A

LW151-151D

H current range: 20 mA
L current range:2m A

LW301-151S

H current range: 50 mA
L current range:10m A

Settingaccuracy

All models

±(1% SET + 1.5% FS)  at23 ±5°C

Switching Mode

Operation mode

Preset value 1/2 or 3/4 switching

Setting method 1: Frequencyand duty

Frequency setting range

1 to 500 Hz

Frequency setting accuracy

±5% SET

Frequency setting resolution

1 Hz

Duty setting range

5 to 95%

Duty setting accuracy

3% SET

Duty setting resolution

1%

Setting method 2: Ta time andTb time

Time setting range

Ta & Tb time: 0.1 to 900.0 ms

Time setting accuracy

±5% SET

Time setting resolution

0.1 ms

・Setting method 1 andsetting method 2 may not be used simultaneously. Select either method when turning onpower.

・The time setting range of method 2is 0.1 to 900.0 ms. However, timeexceeding the preset frequency and duty range of method 1 may not be set.

 Frequencysetting range = 1/(Ta time + Tb time) within 1 to 500 Hz

 Dutysetting range = {Ta time/(Ta time + Tb time)} × 100 within 5% to 95%

DCCurrent Measurement

Resolution

LW75-151Q
LW75-151D
LW151-151D

H current range: 10 mA L current range: 1 mA

LW301-151S

10m A

Accuracy

All models

±(0.5%RDG＋0.3%FS)  at23℃±5℃

Measurement frequency

All models

Twice or more/sec.

DCVoltage Measurement

Item

Resolution

100 mV/10 mV  (Automatic range.  Hysteresis: 90/100 V)

Accuracy

±(0.5%RDG＋0.3%FS)  at 23℃±5℃

Measurementfrequency

Twice or more/sec.

DCPower Measurement

Resolution

LW75-151Q
LW75-151D
LW151-151D

H current range: 100 mw
L current range: 10 mw

LW301-151S

100m W

Accuracy

All models

±(1%RDG＋0.6%FS)  at23℃±5℃, at constant currentover
10%

Measurement frequency

All models

Twice or more/sec

Voltage Remote Sensing

Correction voltage

1V, one way  (Load input terminalvoltage is between min. operating voltage and 150 V.)

External Contact Control

Main input ON/OFF

Maininput is turned on by short-circuiting the contacts.

PRESET 1 to 4 selection

PRESET1 to 4 is selected by short-circuiting the contacts.

Input select ON/OFF

Input select of each channelis turned on by short-circuiting thecontacts.

Alarm IN/OUT

IN:Main input is turned off by short-circuiting the contacts.
OUT: Contacts are short-circuited and main input is turned off when analarm (OVA, OCA or OHA) occurs.

External Voltage Control

Input voltage

Setvalue (0 to 100%) in each discharge mode is adjusted with setting controlknob according to external voltage between 0 and 10 V.

Set value updating time

CCmode: Real time, other mode: 2 seconds

Protection Functions

Out of input voltage range (OVA)

Occurrencecondition: Input voltage over approx. 165 V
Operation: Input select of channel where OVA occurs is turned off .
Recovery condition: Canceling displayed alarm after eliminating occurrencecondition.

Over-current(OCA)

Occurrencecondition: 115% or more of rated input current
Operation: Input select of channel where OCA occurs is turned off .
Recovery condition: Canceling displayed alarm after eliminating occurrencecondition.

Over-power (OPL)

Occurrencecondition: 115% or more of rated input current
Operation: Power limiting circuit of channel where OPL occurs works.Recovery condition: Eliminating occurrence condition.

Overheat (OHA)

Occurrencecondition: Internal heat sink temperature is approx. 120℃.
Operation: Main input is turned off .
Recovery condition: Canceling displayed alarm after eliminating occurrencecondition.

Reverse connection

Shortcircuiting with internal protection diode

Use Conditions, Size, etc.

Use temperature

0 to 40℃

Use humidity

20to 85%  (No condensation)

Storage temperature

-20 to 60℃

Storage humidity

20to 85%  (No condensation)

Source voltage

AC100 V / 120V / 200V / 220V ±10%

Source frequency

50/60Hz

Power consumption

Approx.75 VA

Dielectric strength

Primary- casing: 1500 VAC for 1 minute
Primary - secondary: 1500 VAC for 1 minute

Insulationresistance

Primary- casing, primary - secondary: 500 VDC, 10 MΩ

Secondary - casing: 250 VDC, 5 MΩ

Cooling method

Forcedcooling with fan

Outside dimensions

138W x 124 H x 380 D mm

Maximum dimensions

138W x 148 H x 458 D mm

Weight

Approx.7.1 kg

Accessories

Rearext. control connector: 1
CD-ROM（Instruction manual）: 1
Three-core power cable
Rear terminal cover
Screws & nuts for rear terminalconnection
Adjusting screwdriver (only for models withcontrol functions based on external voltages)

External Interface Control

GP-IB

Possibleto read back set values and input values with IF-50GP.

USB

Possibleto read back set values and input values with IF-50USB.

Communication Specifications of IF-50GP

Electrical specifications

Conformsto IEEE488-1978.

Mechanical specifications

Conformsto IEEE488-1978.

Interface function

SH1,AH1, T6,TE0, L3, LE0, SR0, RL0, PP0, DC0, DT0, & C0

Address setting

Addressbetween 0 and 30 and listen-only function may be set freely when turning onpower.

Transmission delimiter

CR.LF+ EOI

Listener function

Mayset all input conditions of electronic loads under control.

Talker function

May detect all input statuses and settings of electronic loads undercontrol.

Service requestfunction

None

Communication Specifications of IF-50USB

Specifications

Conformsto USB Revision 1.1.

Connector shape

USBseries B

Transmission rate

Fullspeed

기본 액세서리

Rearext. control connector x 1, CD(Instruction manual) x 1, Three-core power cable x 1, Rear terminal cover, Screws & nuts for rear terminal connection, Adjusting screwdriver (only for models with control functions based on external voltages)

옵션 액세서리

IF-50GP

GP-IB control board for LW Series.

IF-50USB

USB control board for LW Series.

S-PL10

ESCAS is application for TEXIO Power supply and Electronic load.

주문 정보

LW75-151QV7A

4채널 프로그래머블 DC 전자 부하 (1~150V/0~15A/75W)

견적요청

LW75-151DV7A

2채널 프로그래머블 DC 전자 부하 (1~150V/0~15A/75W)

견적요청

LW151-151DV7A

2채널 프로그래머블 DC 전자 부하 (1~150V/0~30A/150W)

견적요청

LW301-151SV7A

1채널 프로그래머블 DC 전자 부하 (1~150V/0~30A/300W)

견적요청

LW301-151SV7B

1채널 프로그래머블 DC 전자 부하 (1~150V/0~60A/300W)

견적요청

옵션 액세서리

IF-50GP

GP-IB control board for LW Series.

견적요청

IF-50USB

USB control board for LW Series.

견적요청

S-PL10

ESCAS is application for TEXIO Power supply and Electronic load.

견적요청