How to calibrate an RTD or Platinum Resistance Thermometer (PRT)

Two types of calibrations applicable to PRTs 1)characterization and 2) tolerance testing are discussed. Procedures and examples are given for both. Topics covered:

1) Calibration by 3 different characterization methods

   ITS-90
   Callendar-Van Dusen
   Polynomial

2) Tolerance testing per ASTM 1137 or IEC 60751 standards.