METER TESTING CIRCUIT

摘要

A meter testing circuit for monitoring watt/hour meters. The circuit has a transducer head attachable to the meter and includes an emitter (L1) and two receivers (Q1, Q2) and an indicator which signifies proper positioning of the head relative to the meter. The circuit detects the presence of an index mark on a disk of a mechanical meter or an indicator light on an electronic meter and provides intensity control for the emitter and an output indicative of detection of the mark or light.