Temperature Measurement


Handheld temperature calibration from Instrotech

June 2012 Temperature Measurement

Instrotech’s locally designed and manufactured Calog range of portable process control calibrators incorporate the most modern component technology, comprehensive feature capabilities and tough package design, making the units ideal for use in servicing and repairs in tough plant environments.

Calog-Temp is a high precision, multifunctional temperature calibrator that measures milliamp, millivolt, thermocouple, ohm and resistance temperature detector (RTD) in a single device. The temperature ranges are isolated and can be displayed simultaneously. Injecting thermo-couple millivolts (or RTD ohms) into a transmitter while measuring the output (mA) simplifies field or workshop calibration.

All commonly used thermocouple types K,J,T,B,R,S,E,N,U,L and RTD types Pt50, Pt100, Pt200, Pt500, Pt1000, Ni100 and Ni120 are included in the easy-to-use menu. The thermocouple ranges have automatic internal cold junction or manual or external temperature compensation. The ohms and RTD measurement is selectable for 2, 3, or 4-wire connection and sourcing of ohms and RTDs is in 2-wire form. The milliamp measurement can be passive or active with a 24 V power supply in the measurement line for 2-wire transmitters.

A plug-in extender is supplied with spring terminals for bare wire connection directly to thermocouple wires or compensating cables. The cold junction correction is built into this unit. The back-lit LCD display can be selected for measurement in a clear, precise numeric display or as a graph for use when logging temperature or milliamps over longer periods. This is ideal for when monitoring ovens or optimising PID control.

For more information contact Pieter Deysel, Instrotech, +27 (0)11 462 1920, [email protected], www.instrotech.co.za



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