Switch Test
47
Switch Test
To perform a switch test, follow these steps:
Note
This example used a normally closed switch.
The procedure is the same for an open switch
but the display reads OPEN instead of CLOSE.
1. Connect the Calibrator mA and COM terminals to the
switch using the pressure switch terminals and
connect the pump from the Calibrator to the pressure
switch. The polarity of the terminals does not matter.
2. Make sure the vent on the pump is open and zero the
Calibrator if necessary. Close the vent after zeroing
the Calibrator.
3. Press and hold the upper display A button for
three seconds to enter switch test mode. The upper
main display indicates the applied pressure, CLOSE
will be displayed to the right of the pressure reading
to indicate closed contacts
4. Apply pressure with the pump slowly until the switch
opens.
Note
Pressure the device slowly to ensure accurate
readings. Run the test several times to confirm
repeatability.
5. OPEN displays once the switch is open. Bleed the
pump slowly until the pressure switch closes.
RECALL appears on the display.
6. Press A to read the pressure values for when the
switch opened, for when it closed, and for the
deadband.
7. Hold A for three seconds to exit the switch test or
press l to clear the switch test and rerun the test.
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