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Control electronic load Nets through the Lager CLI. Electronic loads are used to simulate various load conditions for testing power supplies, batteries, and other power sources.

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Syntax

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Global Options

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Commands

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Command Reference

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cc

Set or read constant current (CC) mode in amps.
Arguments:
  • VALUE - Current value in amps (0–40 A). If omitted, reads current setting. Values outside the range are rejected.
In CC mode, the electronic load maintains a constant current draw regardless of voltage changes. Examples:

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cv

Set or read constant voltage (CV) mode in volts.
Arguments:
  • VALUE - Voltage value in volts (0–150 V). If omitted, reads current setting. Values outside the range are rejected.
In CV mode, the electronic load adjusts current to maintain a constant voltage at its terminals.

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cr

Set or read constant resistance (CR) mode in ohms.
Arguments:
  • VALUE - Resistance value in ohms (0.03–10000 Ω). If omitted, reads current setting. Values outside the range are rejected.
In CR mode, the electronic load behaves as a fixed resistance, with current varying according to Ohm’s law (I = V/R).

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cp

Set or read constant power (CP) mode in watts.
Arguments:
  • VALUE - Power value in watts (0–200 W). If omitted, reads current setting. Values outside the range are rejected.
In CP mode, the electronic load adjusts voltage and current to maintain constant power dissipation.

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state

Display the current state of the electronic load.
Returns information about the current operating mode, settings, and measurements.

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Examples

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Operating Modes

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Constant Current (CC)

The load draws a fixed current regardless of voltage:
  • Use for testing power supply regulation
  • Ideal for battery discharge testing
  • Current remains stable as voltage varies

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Constant Voltage (CV)

The load maintains a fixed voltage at its terminals:
  • Simulates a voltage-clamping load
  • Useful for testing current-limited supplies
  • Current varies to maintain voltage

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Constant Resistance (CR)

The load behaves as a fixed resistor:
  • Current proportional to voltage (Ohm’s law)
  • Simulates resistive loads
  • Natural response for many real-world loads

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Constant Power (CP)

The load maintains constant power dissipation:
  • P = V × I remains constant
  • Current increases as voltage drops
  • Simulates switching power supplies and similar loads

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Supported Hardware

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Notes

  • Net names refer to names assigned when setting up your testbed
  • Use lager nets to see available e-load nets
  • Electronic loads can dissipate significant power; ensure adequate cooling
  • Always verify load ratings before applying high power levels