EFFECT OF TEMPORARY TEMPERATURE CHANGE ON STABILITY OF WIRE-WOUND RESISTANCE STANDARDS

J. C. Ryu, Y. T. Park, K. S. Han, K. M. Yu

Abstract

Irreversible resistance changes of Thomas type 1 ohm resistors according to temporary temperature change is about 0.03 ppm/y in average by reported results of PTB, IEN and NIST, but the behavior did not occur in NML 1 ohm resistors under the same condition. By qualitative analysis based on thermal stress and strain, it is considered that a major element of the behavior is thermal stress by different thermal expansions of coils and mandrels.

Keywords

irreversible resistance changes, Thomas type resistors, NML type resistors, thermal stress

Download

IMEKO-WC-2000-TC12-P317.pdf

DOI

-

IMEKO TC

TC12 - Temperature and Thermal Measurements

Back to the proceedings