Measuring and testing – Fluid pressure gauge – Vibration type
Patent
1992-04-14
1994-04-26
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Vibration type
73301, 73708, G01L 1100
Patent
active
053056426
ABSTRACT:
A high precision pressure transducer system for checking the reliability of a second pressure transducer system used to monitor the level of a fluid confined in a holding tank. Since the response of the pressure transducer is temperature sensitive, it is continually housed in an battery powered oven which is configured to provide a temperature stable environment at specified temperature for an extended period of time. Further, a high precision temperature stabilized oscillator and counter are coupled to a single board computer to accurately determine the pressure transducer oscillation frequency and convert it to an applied pressure. All of the components are powered by the batteries which during periods of availability of line power are charged by an on board battery charger. The pressure readings outputs are transmitted to a line printer and a vacuum florescent display.
REFERENCES:
patent: 5138886 (1992-08-01), Tilley, Sr.
Bolton Steven M.
Marchant Norman J.
Morgan John P,.
Piper Thomas C.
Anderson Thomas G.
Hoser William R.
Smith Bradley M.
The United States of America as represented by the United States
Woodiel Donald O.
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