Apparatus and method for in situ calibration of a metering devic

Details Apparatus and method for in situ calibration of a metering devic Apparatus and method for in situ calibration of a metering devic

1990-12-03

1993-08-10

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01F 2500

Patent

active

052338614

ABSTRACT:
An apparatus and method for in situ calibration of a metering device (21) in a gas manifold or plumbing system. A calibrated gas source and inlet (17) are provided. Connected to the calibrated gas source is a first three way valve. The first three way valve is connected to an inlet of the metering device (21) with an outlet connected to a second three way valve. The second three way valve is connected to both a reaction chamber or an exhaust. A calibration gas is allowed to flow through the calibration inlet (17), through the first three way valve, through the metering device (21), and through the second three way valve so as to calibrate the metering device to the calibrated gas source.

REFERENCES:
patent: 4069948 (1978-01-01), Saaty et al.
patent: 4271694 (1981-06-01), Pearman
patent: 4290298 (1981-09-01), Severson
patent: 4341107 (1982-07-01), Blair et al.
patent: 4965756 (1990-10-01), Pearman et al.

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