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and Standard PRTs (standard platinum resistance thermometers).
The calibrator allows you to input the customized values, so you can measure temperature using every kind of RTDs and
Standard PRTs.
How to create a custom industry RTD?
To achieve higher precision with an RTD, IEC and ASTM standards specify a more complex polynomial curve fit that fine-
tunes the resistance-temperature relationship. One form of that equation is given here as below. The industry RTDs also
specify values for the constants R0, A, B, C (The C constant is only used for temperature less than 0°C).
How to create a standard PRT?
The Standard Platinum Resistance Thermometer (SPRT) Calibration Laboratory of the NIST Thermometry Group can
distinguish among the ITS-90 from the argon triple point (Ar TP, -189.3442°C) to the silver freezing point (Ag FP,
961.78°C) for the calibration of SPRTs.
The ITS-90 defines temperature through a set of specified thermometric fixed points, interpolation instruments, and
interpolation equations.
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