Method for temperature compensation of a digital pressure meter

Details Method for temperature compensation of a digital pressure meter Method for temperature compensation of a digital pressure meter

2006-12-12

2006-12-12

Thompson, Jewel (Department: 2855)

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

Reexamination Certificate

active

07146860

ABSTRACT:
A digital pressure meter is equipped with an operational (OP) amplifier circuit, and a thermistor circuit is connected with the OP amplifier circuit for causing change of an amplification ratio of the OP amplifier circuit with such that a temperature compensation for output signals is effected; the thermistor circuit includes thermistors with positive temperature coefficient or ones with negative temperature coefficient; with the help of the thermistor circuit, the digital pressure meter can perform a measurement with an accuracy of ±1% FSO (full scale output) within the working temperature range.

REFERENCES:
patent: 5253532 (1993-10-01), Kamens
patent: 6111739 (2000-08-01), Wu et al.

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