Pressure Switch Testing–documented
when the continuity beeper sounds indicating contact closure of the switch. A workable solution but new tools can make this task easier. Modern calibrators can automatically record the pressure applied when a pressure switch changes from open to closed and from closed to open. In doing so the switch set point and reset point and deadband are much easier to determine.
Classic methods for pressure switch testing have been superseded with the introduction of new pressure test tools. Today most pressure switches are tested with a pressure gauge mounted to a pump to supply and measure pressure, and a DMM set to continuity to verify the opening and closing of the switch. The technician or electrician making the test is required to interpret the pressure applied to the switch
Suggested test tools
Fluke 754 Documenting Process Calibrator-HART See pg 7
Fluke 750P Series Pressure Modules See pg 14
Fluke 700PTP-1 Pneumatic Test Pump See pg 14
Fluke 71X Hose Kit Accessory See pg 16
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Pressure Applications
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