Indicating system for atmospheric pump arrangement

Details Indicating system for atmospheric pump arrangement Indicating system for atmospheric pump arrangement

G - Physics

01

N

73/103

G01N 1/14 (2006.01) G08B 21/20 (2006.01)

Patent

CA 1167281

INDICATING SYSTEM FOR ATMOSPHERIC PUMP ARRANGEMENT ABSTRACT OF THE DISCLOSURE An atmospheric sampling pump arrangement employing a mass flow sensor which electronically monitors mass flow and compares it to a set-point value. The pump is then controlled in a manner that will minimize the difference between the measured flow and the set-point value. When the flow output drops below a predetermined value, a signal is energized to indicate the inability to maintain the desired flow. The system also incorporates a timer circuit which counts up the total amount of time that loss of flow regulation exists. After a predetermined period of cumulative loss of flow regulation, typically 30 minutes, a signal is energized to indicate this condition.

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