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News and articles from Calog Instruments

HAND-HELD TEMPERATURE CALIBRATION

January 29, 2015  1322  1322   

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, repairs in workshops and in tough plant environments.

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

All commonly used thermocouples 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.

Calog - PRESSURE ll pressure calibrator

In its second generation is this instrument for testing, measuring and calibration of all pressure based systems. In addition, the instrument contains functions to install and maintain all powered and non-powered milliamp loops.

This high precision calibrator is suitable for the process industry and apart from pressure measurement, can also measure DC voltage, milliamps, circuit continuity and will source and simulate milliamps.

The Calog – PRESSURE ll uses the Keller series PA-33x digital pressure sensors which are easily plugged into the calibrator via the Binder connector. The ‘measure pressure and milliamp’ function can be used for pressure transmitter calibration. The ‘source milliamp and measure pressure’ function can be used for I/P converter testing or calibration. With TRACKING switched on, the milliamp output will follow the measured pressure making it perfect for recording, data-logging or in place of a pressure transmitter in an emergency.

For more information on the Calog-TEMP & PRESSURE II calibrators, contact Pieter Deysel at Instrotech on 011 462 1920 or visit info@instrotech.co.za