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Session Topic: 7B, Resistance Session

   

Paper Title: Operability Challenges in Resistance Metrology: Pressure and Temperature Coefficients of Commercial 1W Standard Resistors

   

Date & Time: WEDNESDAY, August 7, 2002

 

10:45am - 12:15pm - PARALLEL SESSIONS - SESSION 7

   

Speaker: Chantal Miller INMS, NRC

Email: chantal.miller@nrc.ca

   

Changes in ambient pressure can effect change in the resistivity of alloys used to manufacture resistors. Interlaboratory resistance comparisons at both national and international levels include laboratories with significantly different ambient atmospheric pressures. Recent work [1] has also suggested that exposure to small temperature changes such as those experienced during transport between laboratories can have an hysteretic effect on the measured value of a resistor. We have investigated the effects of pressure and temperature cycles on a number of commercially available 1 W resistors. We will present our results, with particular reference to the implications for high precision interlaboratory comparisons. [1]. P. Warnecke et al, “Anomalous behaviour of precision standard resistors due to changes in ambient temperature”, BEMC Conference, Harrogate, UK 2001.

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