Stability of Small Industrial Platinum Resistance Thermometers
نویسنده
چکیده
This paper reports the results of an investigation of the stability of a selection of small industrial platinum resistance thermometers (IPRTs) upon heat treatment and handling. Ninety-four IPRTs, of several models, obtained from five manufacturers were studied. Most of the IPRTs exhibited calibration drifts and also effects due to the presence of moisture or strain. There was no apparent improvement in the stability if the resistance ratio, R(t)/Ro= W(t), instead of resistance were used as the criterion. Comparisons are made of the relative stability of the products of the five companies.
منابع مشابه
The Nist Industrial Thermometer Calibration Laboratory
The NIST Industrial Thermometer Calibration (ITC) Laboratory provides calibrations of industrial thermometers over the range from –196 °C to 550 °C. The different types of thermometers include liquid-in-glass (LiG), thermistors, thermocouples (<200 °C), and industrial platinum resistance thermometers (IPRTs). Calibrations are performed by both comparison with a standard platinum resistance ther...
متن کاملA New NIST Automated Calibration System for Industrial-Grade Platinum Resistance Thermometers
Industrial-grade platinum resistance thermometers (IPRTs) are calibrated at NIST using a newly automated calibration system. The computer-controlled data-acquisition system is used to calibrate IPRTs over the range from –196 °C to 550 °C using fixed-points (ice point, triple-point of water, and Ga melting point) and comparison baths (cryogenic, water, oil, and salt). A standard platinum resista...
متن کاملWhispering Gallery Mode Thermometry
This paper presents a state-of-the-art whispering gallery mode (WGM) thermometer system, which could replace platinum resistance thermometers currently used in many industrial applications, thus overcoming some of their well-known limitations and their potential for providing lower measurement uncertainty. The temperature-sensing element is a sapphire-crystal-based whispering gallery mode reson...
متن کاملThermometry (temperature measurement)
Thermometry ................................................................................................................................................. 1 Applications .............................................................................................................................................. 1 Temperature metrology ............................................................
متن کاملThermometry (temperature measurement)
Thermometry ................................................................................................................................................. 1 Applications .............................................................................................................................................. 2 Temperature metrology ............................................................
متن کامل