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Thermodynamic Pressure/Temperature Transducer Health CheckA device and procedure for checking the health of a pressure transducer in situ is provided. The procedure includes measuring a fixed change in pressure above ambient pressure and a fixed change in pressure below ambient pressure. This is done by first sealing an enclosed volume around the transducer with a valve. A piston inside the sealed volume is increasing the pressure. A fixed pressure below ambient pressure is obtained by opening the valve, driving the piston The output of the pressure transducer is recorded for both the overpressuring and the underpressuring. By comparing this data with data taken during a preoperative calibration, the health of the transducer is determined from the linearity, the hysteresis, and the repeatability of its output. The further addition of a thermometer allows constant offset error in the transducer output to be determined.
Document ID
20040120993
Acquisition Source
Kennedy Space Center
Document Type
Other - Patent
Authors
Christopher D Immer
Anthony Eckhoff
Pedro J Medelius
Richard T Deyoe
Stanley O Starr
Date Acquired
August 22, 2013
Publication Date
August 31, 2004
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-6,782,753
Patent Application
US-Patent-Appl-SN-994990
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