Apparatus and method for calibrating span of pressure measuring

Details Apparatus and method for calibrating span of pressure measuring Apparatus and method for calibrating span of pressure measuring

1986-10-14

1987-11-24

Noland, Tom

Measuring and testing

Instrument proving or calibrating

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

G01L 2700

Patent

active

047080108

ABSTRACT:
A differential-pressure transmitter having a range diaphragm and a slack diaphragm to receive process pressures and to apply such pressures to an interior sealed chamber containing a fill-liquid. An internal passageway between the regions adjacent the diaphragms provides for transfer of fill-liquid in response to differential pressure changes. The passageway serially includes a vertically-oriented tube containing a ball of magnetic material and surrounded by a solenoid winding. Energization of the winding lifts the ball to the top of the tube. When the winding is de-energized, the ball drops down through the fill-liquid to create a reference pressure pluse which is directed to the range diaphragm to correspondingly alter the instrument output signal. The output signal is monitored to check the span calibration, and adjustments are made as needed.

REFERENCES:
patent: Re31416 (1983-10-01), Olsen et al.
patent: 3106084 (1963-10-01), Hoffman et al.
patent: 3564923 (1971-02-01), Nudd, Jr. et al.
patent: 4051712 (1977-10-01), Zias et al.
patent: 4165651 (1979-08-01), Olsen et al.
patent: 4165652 (1979-08-01), Olsen et al.
patent: 4329775 (1982-05-01), Olsen et al.
patent: 4348673 (1982-09-01), Richardson
patent: 4604891 (1986-08-01), Sgourakes et al.
patent: 4638656 (1987-01-01), Sgourakes

Affiliated with

Also associated with

Rating

Apparatus and method for calibrating span of pressure measuring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for calibrating span of pressure measuring , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for calibrating span of pressure measuring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2420992