Temperature coefficient variations in heat treated Evanohm and their effect on the transient behavior of the NML 1 Ω resistors

Author

Pritchard, Brian J. ; Small, Greig W.

Author_Institution

Nat. Meas. Lab., CSIRO, Lindfield, NSW, Australia

Volume

42

Issue

2

fYear

1993

fDate

4/1/1993 12:00:00 AM

Firstpage

557

Lastpage

561

Abstract

The NML 1-Ω Evanohm resistors have a transient thermal response that is a function of the resistor element and the local thermal environment. The temperature coefficient of the Evanohm coil varies systematically from top to bottom as well as in an arbitrary pattern turn by turn. In the presence of a temperature gradient the resistance value may be different from that when the temperature is uniform. This temperature gradient should be less than 30 mK if the change resistance is to be less than 0.01 p.p.m

Keywords

electric resistance measurement; heat treatment; measurement standards; resistors; transient response; 1 ohm; Evanohm coil; NML; fabrication; heat treated Evanohm; local thermal environment; temperature coefficient; temperature gradient; transient behavior; transient thermal response; Coils; Electrical resistance measurement; Heat treatment; Petroleum; Q measurement; Resistance heating; Resistors; Temperature distribution; Temperature sensors; Thermal resistance;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.278625

Filename

278625