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.
