Development of a stable transfer standard thermometer. I-evaluation of vibration damage on standard platinum resistance thermometers

It is well known that standard platinum resistance thermometers (SPRTs) are delicate against mechanical shock and vibration. This delicacy causes resistance instability that is one of the most effective factors of uncertainty in precise measurement, such as the fixed point comparison. Development of a mechanically-stable SPRT reduces this uncertainty. As a preliminary experiment, we evaluated mechanical characteristic of existing types of SPRT.