Gas pressure measuring circuit

Details Gas pressure measuring circuit Gas pressure measuring circuit

1982-08-24

1985-09-17

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Electrical

73708, G01L 2112

Patent

active

045412863

ABSTRACT:
In a circuit for controlling the temperature of a filament in a Pirani gauge head, secondary temperature compensation is provided by mounting an auxiliary resistor adjacent the temperature-compensating arm of a bridge. The auxiliary resistor forms part of a potential divider which provides a preset offset voltage to an associated output amplifier. This offset voltage is added algebraically to the variable voltage driving the bridge circuit so as to provide additional temperature compensation.

REFERENCES:
patent: 3216249 (1965-11-01), Joel
patent: 3368407 (1968-02-01), Orr, Jr. et al.
J. English et al., "A Wide Range Constant-Resistance Pirani Gauge with Ambient Temperature Compensation", J. Sci. Instrum., 1965, vol. 42, pp. 77-80.
A. Onol, "A Simple Constant-Resistance Termistor Pirani Gauge", J. Phys. E. Sci. Instrum., vol. 11, 1978, pp. 294-295.

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