The Greenlee DM-820A-C Digital Multimeters is a hand-held testing devices with the following measurement capabilities: AC and DC voltage, AC and DC current, frequency, resistance, capacitance, and duty cycle of logic level signals. They also check diodes and verify continuity. All meters feature true RMS AC measurements, a relative zero mode, data hold mode, and an intelligent automatic power off. An optional optically isolated computer interface with software facilitates the recording of readings from the meter to a computer.
The DM-820A-C multimeters have the following additional capabilities: temperature (K-type thermocouples only); conductance; a crest function, which captures voltage or current signal peaks; and a recording function, which stores the maximum, minimum, and difference (maximum-minimum) input readings. The DM-820A and DM-830A record function can also calculate the average reading. These two models also have non-contact and single-probe voltage detection.
