Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1983-10-28
1985-04-23
Swisher, S. Clement
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01L 2700
Patent
active
045121796
ABSTRACT:
A microprocessor controls pressure transducer testing, calibration, and adjustment. A transducer or unit under test (UUT) receives a fluid pressure signal from a test line, and outputs a corresponding electrical signal. A test pressure is output from a fluid pressure module which is connected to the UUT. A human operator is interrogated by the microprocessor based control unit as to (1) identifying details about the desired pressure UUT to be tested, and (2) the anticipated electrical range to be encountered in reply to an applied test pressure. The microprocessor then sequentially generates electrical output signals which are sent to the test lines to generate the test pressure pulses from a fluid pressure supply. The pressure test pulses are delivered to the UUT. As the UUT receives the sequence of pressure test pulses, the microprocessor records the output electrical signals generated by the UUT, and compares them to an internal reference pressure transducer output. Display of the results occurs with preferably the percent error calculated at each step. Provision for pressure transducer UUT calibration is made by providing the calibration instrument with the ability to issue tonal and visual signals in response to UUT adjustments, thus providing sense and amount of adjustments of the zero point and span range of the transducer under test.
REFERENCES:
patent: 2893236 (1959-07-01), Coon et al.
patent: 3089331 (1963-05-01), Sharko et al.
patent: 3790910 (1974-02-01), McCormack
patent: 4086804 (1978-05-01), Ruby
Burdg Charles E.
Choong Tsi-Pin
Dalke Charles A.
Hankin Gary H.
Izzo Kenneth R.
General Electric Company
James, Jr. Ivor J.
Simkins Raymond G.
Swisher S. Clement
Turner Samuel E.
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