Process calibrators are considered a handy tool for the calibration and troubleshooting of process control equipment.

As explained mA, mV, and frequency signals are used in a variety of electronic appliances including PLCs. Input signals are often required for calibrating and simulating processes during troubleshooting, so a Multifunction Process Calibrator is a useful instrument. A Multifunction Process Calibrator with a dual-function display (calibrator and/or multimeter) is capable of the following functions:

  • Constant voltage output: 0-1.5 V DC with a resolution of 0.1 mV, 0-15 V DC with a resolution of 1mV
  • constant current output: 0-25 mA with a resolution of 1 mA
  • square wave output: 0.5 Hz-5kHz with an amplitude of 5 V, +/-5 V, 12 V, and +/-12 V. The resolution is the ability of the instrument to differentiate between two signals of close frequency. It is determined by the gate time.
  • The following processes can be managed using a Multifunction Process Calibrator
  • Two-wire transducer simulation on a current loop
  • two-wire transmitter operational checks
  • R/l and U/l converters – transmitter simulation and operational checks
  • thermocouple output simulation and operational checks
  • frequency transmitter simulation and operational checks
  • F/l converters – operational checks and simulation
  • proximity transducers – operational checks and simulation.

At the end of this chapter, Below Table gives a brief overview of the different process calibrators available from various manufacturers.

Various brands process calibrators
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