Practical Instrument Electronics 422 User Manual

Practical instrument electronics

Page 1

Practical Instrument Electronics

82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • [email protected] • www.piecal.com

Model 422

Automated Thermocouple Calibrator

Operating Instructions

Model 422

Automated Thermocouple Calibrator

Operating Instructions

Product Description

• Easy to use

With the PIECAL 422 you can check & calibrate all your

thermocouple instruments and measure thermocouple

sensors.

• Take it with you into the shop, plant or field

Carry it without worry - it comes protected with a rubber

boot and rugged, low profile switches. Easy to operate

even in the dark areas of the plant with the backlit display.

• Calibrate directly in temperature (°C & °F)

Stop carrying around a millivolt source and thermocouple

tables. The PIECAL 422 works with the thermocouples

you use including types J, T, E, K, R, S, B, N, G, C, D, L

(J-DIN), U (T-DIN) and Platinel II. 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

Trouble shoot sensor connections and find broken wires. The PIECAL 422 measures the

thermocouple in degrees C or F. Secondary display shows the millivolt value corresponding to

the thermocouple temperature as well as the cold junction temperature measured by the

calibrator.

• Calibration Lab Accurate & Stable

The internal cold junction thermistor is accurate to ±0.05°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 422 more accurate than most other handheld and benchtop

thermocouple calibrators.

• Perform Heat Treating Uniformity Surveys and System Accuracy Tests

The PIECAL 422 meets or exceeds the requirement of AMS 2750 as both a Secondary

Standard Instrument and as a Field Test Instrument.