Analog input voltage and current mode

You can set the analog input’s mode for voltage or current sensing.

In current mode, the analog inputs have a low input resistance while the meter is powered on, and a high input resistance when the meter is powered off. In voltage mode, the analog inputs have a high input resistance regardless of whether the meter is powered or not.

NOTE: When unpowered, your meter’s analog inputs act like they are in voltage mode (high input resistance).

When connected to a current output transducer, this high resistance can create a high voltage. Standard (i.e., 4 to 20 mA) current transducers have open circuit protection and are able to handle a high input resistance; however, if non-standard transducers are used high voltages may be generated. Your meter’s analog input has circuitry to limit this voltage, but it may not be sufficient with a very high-power current source.

  • Ensure the analog input is configured for the correct voltage or current mode before connecting or activating the current transducer.
  • Do not exceed the device’s ratings for maximum limits.
Failure to follow these instructions will result in equipment damage.
Related topics

See “Option modules” on page 184 for your option module’s analog voltage and current range specifications.

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