Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1987-11-12
1989-06-06
Tokar, Michael J.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01L 2700
Patent
active
048360112
ABSTRACT:
A zero and span adjustment circuit for current to pressure transducers. Current sources in parallel with the transducer bypass current around the transducer. One current source includes a variable resistor for adjusting the zero set point independently of the input current signal. The other current source includes a variable resistor for adjusting the span of the output pressure proportional to the input current signal. A feedback resistor couples a feedback signal from the transducer current to the other current source to vary the bypass current.
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Dombrowski Ferdinand
Forster Dieter
Fisher Controls International Inc.
Raevis Robert R.
Tokar Michael J.
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