The DC80L is a calibrator for measuring and simulating V, mV, and mA signals, including 0 to 24mA DC current and voltages up to 15Vdc.

With use of an external power supply provided by the system, the calibrator can be placed in series to measure the loop current (signal of a 2-wire transmitter for example). On the other hand, the calibrator can provide power to the loop. This option makes use of the DC80L built-in power supply. This configuration applies to measurements of standalone 4-20mA transmitters (sink-type transmitters).