This multi-purpose, two-piece test set quickly and accurately calibrates, performs acceptance testing and troubleshoots most popular solid-state and electromechanical relays. Model SR-90 also can be used to test small molded case circuit breakers and motor overload relays, and for timing circuit breakers. These manually operated units work separately to test simple relays or can be interconnected to provide four simultaneous outputs for more complex relays.
