Practical Instrument Electronics (PIE) 541 Frequency Calibrator with Totalizer

The PIE 541 Frequency Calibrator with Totalizer is a portable, precision calibrating tool for the testing and diagnosing of frequency devices at any location. Offering an accuracy of ±0.005% of range, the calibrator can be used for devices with frequencies from 1 cycle/h to 20 kHz. It can read a wide range of signal frequencies and waveforms from 50 mV to 120 V peak.

The product calibrates, tests and diagnoses turbine meters, frequency counters, vibration systems, tachometers, flowmeters, vortex shedders, integrators and other frequency devices. It can be used to calibrate positive displacement flowmeters, watt-hour meters or slow-rated integrators with frequencies as low as one count per hour and magnetic pickups with square wave outputs.

As a waveform source, the output can be specified as a sine or square wave with amplitudes from 100 mV to 12 V pk-pk, simulating signals from vibration pickups, variable speed drives, etc. It also functions as a totaliser for inputs or outputs from 1 to 99,999 in 1 to 100 min.

The product has a gate-time LED which flashes with received pulses, indicating when the proper input adjustment level has been met. When calibrating, the product eliminates the need for a stopwatch since it automatically stops when the preselected number of pulses has been sent to the totaliser.