Glossary of Temperature Calibration Terms
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Dry Well CalibratorA temperature calibrator that uses a precision oven to source precise temperature. This style of calibrator is often used for the verification of temperature sensors.
Excitation CurrentA constant current applied to an RTD probe to determine actual resistance for temperature measurement. Typical values are 2 mA or less to minimize self-heating of the probe.
IPTS-68International Practical Temperature Scale of 1968. A temperature standard adopted in 1968 that uses intrinsic standards to define the measurement of temperature.
ITS-90International Temperature Scale of 1990. A temperature standard adopted in 1990 that uses intrinsic standards to define the measurement of temperature. This standard modifies the intrinsic standards of IPTS-68 with additional intrinsic references.
Lead Resistance CompensationA compensation method used with 3 and 4 wire RTDs and resistance measurement. This method negates the error associated with lead resistance when making an RTD measurement.
Reference TemperatureThe temperature at which a thermocouple temperature measurement is referenced. For Fluke Calibration tools, this is the temperature where the thermocouple mini-plug is connected to the calibrator.
RφThe resistance value of an RTD probe at 0 °C. Example PT100-385, Rφ = 100 Ω.
RTDResistance Temperature Device, a temperature measurement sensor that has predictable changes in resistance with a change in temperature. The most common RTD is the platinum PT100-385.
Seebeck EffectThermoelectric effect in which the voltage potential increases with temperature (thermocouples) in a junction of dissimilar metals.
Triple Point of WaterThis temperature reference point is the intrinsic standard at which water is liquid, ice and gas. This reference point defines 0.01 °C.