Pressure calibration method and apparatus

Details Pressure calibration method and apparatus Pressure calibration method and apparatus

1988-10-24

1990-03-20

Raevis, Robert R.

Measuring and testing

Instrument proving or calibrating

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

G01L 2700

Patent

active

049090631

ABSTRACT:
A differential pressure calibrator (with built in overrange protection) using a "dropping ball and weight" technique and a mode unit which eliminates the need for a process manifold is disclosed in the subject invention.

REFERENCES:
patent: 4604891 (1986-08-01), Sgourakes
patent: 4638656 (1987-01-01), Sgourakes
patent: 4681143 (1987-07-01), Sato et al.
patent: 4708010 (1987-11-01), Sgourakes

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