The Practical Instrument 322 Automated Four Type Thermocouple Calibrator with Source & Read Functions enables users to check and calibrate thermocouple instruments and to measure thermocouple sensors.

Take it with You Into the Shop, Plant or Field

Carry the PIECAL 322 without worry - it comes protected with a rubber boot and rugged, low profile switches. It is easy to operate even in the dark areas of the plant with its backlit display.

Calibrate Directly in Temperature (°C & °F)

Stop carrying around a millivolt source and thermocouple tables. The PIECAL 322 works with the thermocouples you use, including types J, T, E and K (not included). Easily set any value quickly to within 0.1° with the adjustable digital potentiometer "DIAL", plus store any three temperatures for instant recall with the EZ-CHECK switch.

Calibrate Quickly with Automatic Output Stepping

Choose between 2, 3, 5, 11 steps and ramp to automatically increment the output in 100%, 50%, 25%, 10% of span or continuously ramp between span and zero. Select the step time to match your system from 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 and 60 seconds.

Compatible with All Process Instruments

Connect directly to the thermocouple inputs of smart transmitters, PLCs, DCS and multichannel recorders and verify their outputs or displays.

Measure Thermocouple Sensors

Troubleshoot sensor connections and find broken wires. The PIECAL 322 measures the thermocouple in degrees C or F.

Calibration Lab Accurate & Stable

The internal cold junction thermistor is accurate to ±0.1°C and is traceable to NIST. The sensor is thermally bonded to an isothermal mass, which includes brass blocks with screw terminals for connection of bare thermocouple wires along with a miniature thermocouple connector for fast connections. The circuitry uses an extremely stable voltage reference and low drift components, which make the PIECAL 322 more accurate than most other handheld and benchtop thermocouple calibrators.