RTD Transmitter Calibration

A multifunction temperature calibrator is used to provide all the necessary input values and output measurements. The calibrator provides the RTD simulation for the transmitter inputs and a milliammeter to measure the transmitter outputs. RTD tables are not necessary because temperature can be input directly.

Connect the RTD transmitter input and output terminals according to the diagram provided with the calibrator. The calibrator simulates the RTD resistance for the transmitter and displays the resulting milliamp output.

Perform a five point upscale and downscale test. Zero is corrected at 10% input and adjusted for 10% output as shown on the milliammeter. Correct the span at 90%. Zero and span interact, recheck and adjust as required…