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Suggested test tools
Pressure switch testing–documented
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been superseded with the introduction of new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
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.
Fluke 754
Documenting
Process
Calibrator-HART
See pg 5
Fluke 750P Series
Pressure Modules
See pg 12
Fluke 700PTP-1
Pneumatic
Test Pump
See pg 23
Fluke 71X Hose Kit
Accessory
See pg 23
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Pressure Applications