How to Calibrate an RTD Transmitter

The RTD transmitter is usually factory calibrated to the temperature range shown on the device name plate. When the performance deteriorate and the transmitter needs recalibration, the transmitter is normally calibrated by using a resistance decade box. 

Materials Required for Calibration

To calibrate the RTD transmitter, the following equipment will be required:

1.  Voltmeters (digital) of suitable accuracy and very high resolution – 1mv

2.  A 24VDC power source

3.  A 5 dial Resistance Decade Box with high precision providing 100Ω steps 

Calibration Steps:

Connect the above equipment as in the setup below:

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