G - Physics – 01 – K
Patent
G - Physics
01
K
354/29, 73/72
G01K 7/20 (2006.01) G01K 7/24 (2006.01) G01R 17/10 (2006.01)
Patent
CA 1175677
ABSTRACT OF DISCLOSURE A resistance bridge circuit is temperature compensated, for both zero error and sensitivity, over a predetermined temperature range by connecting a first compensating resistance in series with one resistor of the bridge, and a second compensating resistance in parallel with the same or an adjacent resistor of the bridge, to reduce zero error, the positions and values of the first and second resistances nring determined from measurements, at a plurality of temperature levels, of the voltage levels and resistance values of the bridge, and on the arrangement of proposed external connections to the bridge. Third and fourth compensating resistances are connected in series and parallel respectively with the bridge as a whole, the values of the third and fourth resistances being dependent on measurements as aforesaid and on the proposed external connections. The four compensating resistances are the only compensating elements required to provide a predetermined zero error and sensitivity.
397888
Lucas Industries Limited
Marks & Clerk
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