Cross coil meter with correction for resistance variations

Details Cross coil meter with correction for resistance variations Cross coil meter with correction for resistance variations

1995-06-28

1997-03-11

O'Shea, Sandra L.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With electromagnetic field

G01R 11185

Patent

active

056105134

ABSTRACT:
A memory stores correction coefficients for correcting variations of resistance values of coils L.sub.s and L.sub.c depending upon a temperature. A temperature or a resistance value of a cross coil meter is detected, and an output of a microcomputer is corrected using a correction coefficient stored in the memory. In accordance with the corrected output, a current amount to be supplied to the cross coil meter is controlled. Therefore, the cross coil meter can receive a predetermined amount of current regardless of a temperature variation.

REFERENCES:
patent: Re32604 (1988-02-01), Reenstra
patent: 4715043 (1987-12-01), Chikasue
patent: 4758784 (1988-07-01), Baker et al.
patent: 5347213 (1994-09-01), Johnston et al.
patent: 5382897 (1995-01-01), Nagami

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