Leak detector calibrating device

Details Leak detector calibrating device Leak detector calibrating device

1987-04-23

1989-01-03

Noland, Tom

Measuring and testing

Instrument proving or calibrating

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

73 40, G01M 302, G01D 1800

Patent

active

047947845

ABSTRACT:
A leak detecting apparatus includes a detector arranged for sensing a gas emanating through a specimen to be tested for leaks; a leak simulator having an outlet emitting a gas of a known flow rate; and a valve for selectively connecting the outlet to the detector during a calibration thereof and disconnecting the outlet from the detector during a leak detecting operation thereof. The valve comprises a fast-switching 3/2-way valve including a movable valve member having first and second positions. In the first position the movable valve member allows communication through the valve solely between the outlet of the leak simulator and an input of the detector and in the second position allows communication through the valve solely between the outlet of the leak simulator and the atmosphere.

REFERENCES:
patent: 4328700 (1982-05-01), Fries
patent: 4343176 (1982-08-01), Basford et al.
Baryshnikova et al., "A Leak Simulator for Calibrating Helium Leak Detectors During Tests by the Probe Method", Instruments & Experimental Techniques, vol. 16, No. 6, pt. 2, pp. 1763-1764.

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