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LOW VOLTAGE ELECTRONIC LOADS
Low Voltage Operating Electronic Load

ELA-155 Electronic Load. Low Voltage Operation. Voltage 120V, Current 30A. 150W, 10A/us slew rate.
 ELB-155 Electronic Load. Low Voltage Operation. Voltage 300V, Current 15A, 150W, 5A/us slew rate.
 ELC-155 Electronic Load. Low Voltage Operation. Voltage 500V, Current 6A, 150W, 0.5A/us slew rate.

Constant Current (CC), Constant Resistance (CR), Constant Voltage (CV), Constant Power (CP), External Control, Dynamic, Sequence, Short and Current Limit modes.
Dynamic mode : Up to 16 combinations of any Current & Time can be set.
 

FEATURES

  • Peak power: works up to 30x as high as rated power

  • Operate with lower voltage

  • Sequence mode with up to 1024 steps

  • Standard TRIG OUT for cur, monitoring

  • Standard GP-IB and USB Interfaces

  • Memory for 6 settings (means range, settings)

  • Ripple Noise meas. Option (factory opt.)
     

Load Section
 Max rating
  ELA-155 ELB-155 ELC-155
Current 30A 15A 6A
Voltage 120V 300V 500V
Internal min resistance(*9) 35m ohm 135m ohm 500m ohm
Internal inductance(*9) 500nH 800nH 4uH
Min operating voltage(*8, 9) 1V(30A) / 0.5V(15A) / 0.2V(6A) 2V(15A) / 1V(7.5A) / 0.5V(3.75A) 3V(6A) / 1.5V(3A) / 0.7V(1.4A)
Peak power(*7) < 20us 3600W 4500W 3000W
< 2s 400W 400W 400W
< 20s 250W 250W 250W
Rated power 150W
    CC mode
Current range
(Setting range) 		H 0～30A 0～15A 0～6A
M 0～3A 0～1.5A 0～0.6A
L 0～0.3A 0～0.15A 0～0.06A
Nominal resolution(*1) H 2.5mA 1.25mA 0.5mA
M 0.25mA 0.125mA 0.05mA
L 0.05mA 0.025mA 0.01mA
Accuracy(*4) H +/-0.2% of stg. +/-15mA+Vin/Rin +/-0.2% of stg. +/-8mA+Vin/Rin +/-0.2% of stg. +/-6mA+Vin/Rin
M +/-0.2% of stg. +/-8mA+Vin/Rin +/-0.2% of stg. +/-4mA+Vin/Rin +/-0.2% of stg. +/-3mA+Vin/Rin
L +/-0.2% of stg. +/-3mA+Vin/Rin +/-0.2% of stg. +/-2mA+Vin/Rin +/-0.2% of stg. +/-1mA+Vin/Rin
    CR mode
Voltage range 20V 50V 85V
Resistance range
(Setting range) 		H 0.05 - 400 ohm 0.2 - 1600 ohm 0.6 - 5k ohm
M 0.5 - 4k ohm 2 - 16k ohm 6 - 50k ohm
Nominal resolution(*1) H 2ms 500us 166us
M 200us 50us 16.7us
 
Voltage range 120V 300V 500V
Current range
(Setting range) 		H 0.15 - 1.2k ohm 0.6 - 5.0k ohm 1.8 - 14k ohm
M 1.5 - 12k ohm 6 - 50k ohm 18 - 140k ohm
Nominal resolution(*1) H 667us 166us 55.5us
M 67us 16.6us 5.5us
Accuracy(*2, 4, 6) +/-0.5% of Conv. Curr. +/-0.2% of f.s. +Vin/Rin
    CV mode
Voltage range
(Setting range) 		H 0 - 120V 0 - 300V 0 - 500V
L 0 - 20V 0 - 50V 0 - 85V
Nominal resolution(*1) H 10mV 30mV 50mV
L 2mV 5mV 10mV
Accuracy +/-0.2% of stg. +/-0.2% of f.s.
Response time Fast/Slow (300us/10ms Typ)
    CP mode
Power range H 0 - 150W
M 0 - 20W
Nominal resolution(*1) H 25mW
M 2.5mW
Accuracy(*4) +/-2.5% of stg. +/-1% of f.s. +/-(VinXVin)/Rin
    External control mode
Current range
(Setting range) 		H 0 - 30A 0 - 15A 0 - 6A
M 0 - 3A 0 - 1.5A 0 - 0.6A
Nominal resolution(*1) H 5mA 2.5mA 1mA
M 0.5mA 0.25mA 0.1mA
Accuracy(*4, 5) +/-0.2% of stg. +/-0.5% of f.s. +Vin/Rin
Control voltage 0 - 10V
    Dynamic load mode
   Dynamic mode
Control method Switching
Loading mode CC mode
Setting period - 20ms / - 200ms / - 2s / - 20s / - 60s
Period resolution 1us / 10us / 100us / 1ms / 10ms
Operating mode Continuous, Single
Slew rate
(Current range) 		H 0.1 - 10A/us 0.05 - 5A/us 5m - 0.5A/us
M 0.01 - 1A/us 5m - 0.5A/us 0.5m - 50mA/us
L 0.001 - 0.1A/us 0.5m - 0.05A/us 0.05m - 5mA/us
Min load response time(*3) 500ns
 
   Sequence mode
Loading mode CC / CR / CV / CP mode
Max steps 1024
Step duration 1ms - 10min
Duration resolution 1ms(1ms - 100ms) / 100ms(100ms - 10min)
    Short mode
Short current (MAX) 30A 15A 6A
    Current limit setting
Current range
(Setting range) 		H 0.15 - 30A 75m - 15A 30m - 6A
M 0.015 - 3A 7.5m - 1.5A 3m - 0.6A
Nominal resolution(*1) H 0.15A 75mA 30mA
M 15mA 7.5mA 3mA
    Parallel operation
Master-Slave operation. One master unit can control up to 4 units of slaves of same voltage rating. For example: If the master unit is ELA-305 then ELA-155, ELA-305 or ELA-1005 may be connected as slave unit.

*1 : Nominal resolution: Approximated resolution of the range.
*2 : Conv.Curr: Ideal current value being calculated by [input / set R]
*3 : Min load response time: Minimum time required by the load when setting slew rate.
*4 : Rin: ELA-155 : 100kohm(typ) ELB-155 : 200kohm(typ) ELC-155 : 1500kohm(typ)
*5 : External control setting accuracy: Setting accuracy is defined when external control
      voltage of 10V is fed.
*6 Setting accuracy in CR mode is valid when applied 10% or more voltage of the voltage range.
*7 : It may vary in accordance to the internal temperature.
*8 Minimum operating voltage vary according to the current value.
*9 At rear loading terminals.

Measuring Section
DC V
  ELA-155 ELB-155 ELC-155
Range H 120.00V 300.00V 500.00V
L 20.000V 50.000V 85.000V
Resolution H 10mV 10mV 10mV
L 1mV 1mV 1mV
Accuracy(*1) +/-0.05% of rdg. +/-0.05% of f.s.
Measuring time(*2) Approx. 100ms
    DC I
Range(*3) H 30A 15A 6A
M 3A 1.5A 0.6A
L 0.3A 0.15A 0.06A
Resolution H 0.25mA 0.25mA 0.25mA
M 0.05mA 0.05mA 0.05mA
L 0.05mA 0.05mA 0.05mA
Accuracy(*1) H, M +/-0.2% of rdg. +/-0.2% of f.s.
L +/-0.2% of rdg. +/-0.5% of f.s.
Measuring time(*2) Approx. 100ms
    Power
Measuring method(*4) Calculation by [Voltage X Current]
Measuring time(*2) Approx. 200ms

*1 Guaranteed for 6 months at 23 +/- 5C, <70% RH
*2 Measurement time when set at same measuring mode and range.
*3 Current measurement range depends on load setting range.
*4 Absolute value of the measurement.

General
General
  ELA-155 ELB-155 ELC-155
Loading terminals Both on front panel and rear panel
Rated AC input AC100 - ～240V +/- 10% 50/60Hz
Power consumption not more than 45VA (When in AC100V)
Operating temperature 5 - 40C
Cooling system Forced cooling fan
Dimensions 215(W) X 128.6(H) X 420(D) Excluding projected part
Weight Approx. 10Kg
    Interface
GP-IB Conforming to IEEE488.1
USB Conforming to USB1.1
External control voltage 0 - 10V
    Protection, Alarm
Over current protection Protect load section by limiting the current.
Over power protection Protect load section by limiting the power.
Over voltage alarm Generate alarm when over voltage is applied.
Temperature protector Generate alarm and cut off the output when overheated.
Reverse connection alarm Generate alarm when reverse voltage is applied.

* Noted that the alarm function does not protect the instrument. Remove the cause of alarm to protect the instrument.

 TRIG OUT
  ELA-155 ELB-155 ELC-155
Output(*1) Photo coupler output
Output voltage CC1 +5V (Typ)
from CC2 0V (Typ)
    CURRENT MONITOR
Current range(*2, 3) H, M 1V / 30A f.s. 1V / 15A f.s. 1V / 6A f.s.
L 0.04V / 0.3A f.s. 0.04V / 0.15A f.s. 0.04V / 0.06A f.s.
Output resistance 50 ohm
Accuracy(*4) H, M +/-1% of Conv.Volt. +/-1% of f.s.
L +/-5% of Conv.Volt. +/-3% of f.s.

*1 TRIG OUT: Isolated / *2 CURRENT MONITOR: Not isolated
*3 Full scale of the current monitor and rated current are different in current range High, Mid and Low.
*4 Conv.Volt means approximated value of [Measured current X (FS of current monitor / Rated current)]

 

Please email sales@hotektech.com or call 253-927-6186 if you are interested in a purchase, or
  need additional information.

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