Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1982-02-16
1983-11-15
Ruehl, Charles A.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73766, G01L 2500
Patent
active
044148372
ABSTRACT:
There is disclosed an apparatus and a technique for shunt calibration of a Wheatstone bridge array independent of temperature. The structure involves a side completion half bridge array which has two temperature sensitive resistors as semiconductor strain gages forming one arm of the bridge and two temperature insensitive resistors forming the other arm of the bridge. An input voltage is applied to two opposite terminals of the bridge via equal span resistors and an output is taken between the common terminals of each of the bridge arms. A calibration resistor is positioned to shunt a span resistor and a temperature insensitive resistor to provide a calibrated output voltage of a magnitude independent of temperature.
REFERENCES:
patent: 3046782 (1962-07-01), Laimins
patent: 3074175 (1963-01-01), Ludlan
patent: 3130578 (1964-04-01), Ames, Jr.
patent: 3490272 (1970-01-01), Russell
patent: 4172389 (1979-10-01), Branch
patent: 4333349 (1982-06-01), Mallon et al.
Bernstein Harold
Bice James W.
Gravel Charles L.
Noland Tom
Plevy Arthur L.
Plevy Arthur L.
Ruehl Charles A.
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