Parameter measuring apparatus

Details Parameter measuring apparatus Parameter measuring apparatus

G - Physics

01

K

73/69

G01K 7/00 (2006.01) G01K 7/24 (2006.01)

Patent

CA 1325531

ABSTRACT OF THE DISCLOSURE A parameter measuring apparatus having a constant signal circuit for providing a constant signal for use by the apparatus; a sensor in- cludable in the constant signal circuit for sensing and indicating a measured parameter, the sensor having a known response to a parameter over a parameter range having a high parameter limit and a low parameter limit; a plurality of stable passive reference elements includable in the constant signal circuit for establishing a real- time system reference indication at least of substantially the high parameter limit and substantially the low parameter limit; an indica- tion sampling element for sampling and signalling an indication between sample points in the apparatus; a switching element for selectively operatively including the sensor or one of the plurality of passive reference elements in the constant signal circuit between the sample points; and a calculator element responsive to the sampling element signalling and using the known response of the sensor to calculate and accurately indicate the measured parameter.

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