Extend the usefulness of your Model 942 Frequency Calibrator to measure and simulate a wide variety of relays, mechanical pickups and other dry contact frequency devices.

Calibrate inputs to your flowmeters, totalizers, SCADA, telemetry systems, supervisory control systems and other frequeny control devices using the Model 942 with the Model C-41 to simulate the remote sensor. Many of these systems provide an excitation current or voltage which the sensor interrupts to generate the frequency signal. Coupled with the Model 942 Frequency Calibrator, the Model C-41 simulates the contacts of these sensors to calibrate these devices from 1 Count-per-hour to 5 KHz.

Check all your relays, mechanical contacts, cam driven switches, photoconductive cells, and momentary contact switches. The Model C-41 supplies an excitation current which allows the Model 942 to read your dry contacts from 10 Counts-perhour up to 2 KHz. An adjustable filter on the Model C-41 combined with the trigger level adjustment of theModel 942 allow a wide variety of electronic and mechanical contacts to be measured.

Many mechanical contacts (relays, switches, etc.) bounce when they are closed. This causes a ringing effect on the waveform that is being generated. The Model C-41 has an adjustable circuit that filters this effect and allows the Model 942 Frequency Calibrator to measure the correct frequency.