TE-WILBUR OPERATIONS MANUAL REV 002.22 4/27/2017
Tisch Environmental 1-TSP-AND-PM10 firstname.lastname@example.org www.tisch-env.com Page 155 of 185
14.8 Pressure Sensor
The vacuum pressure sensor is a TE-Wilbur part number TE-W-153. The
vacuum pressure sensor used in the TE-Wilbur sampler is ranged 0-15psia
vacuum and provides a 4/20mA signal based on vacuum pressure.
Pressure sensor alarm,
cable unplugged or
PLC input card
Ensure the connector for the pressure sensor is
plugged in and seated properly.
Ensure there is 27VDC on terminal 7 to DC
ground which is the pressure sensor supply
Using an amp-meter capable of measuring mA
disconnect the wire on terminal 8 and place one
probe on terminal 8 and one probe on the wire
from the pressure sensor you just removed. At
no pressure you should have a pressure reading
between 4-5mA. If you have no mA reading,
replace the pressure sensor.
If you have a 4-5mA reading with no pressure
you can pressurize the sensor by running the
pump in manual mode and restricting the flow.
As you restrict the flow you should see the mA
output climb. If the mA output is working and
the alarm still exists or it is still not reading
correctly, replace the analog input card.