OPW M2010-EU, Installation Manual

Page: 81 / 149

Interstitial Hydrocarbon Liquid Sensor with Water Indicator - Functional
Test and Remove Contamination
CAUTION: Use caution to prevent dangerous conditions when you do work
in a hazardous area.
Make sure that the area has sufficient airflow when you do a test or remove
contamination from the sensor. Make sure there are no open flames or hot
surfaces near the work area.
NOTICE: Do not use fuel (gasoline, diesel etc.) to test or clean the sensor! Once
the carbon/polymer material has touched liquid hydrocarbon, it is possible that the sensor
will not return to its initial electrical resistance. This can have an unwanted effect on its
operation. Replace the sensor if necessary. If you do not obey this instruction it can void
your warranty.
Functional Test - Hydrocarbon Liquid Sensor of the Device
l
Put the polymer fully into
Mineral Spirits
and wait approximately 10 minutes.
l
Remove the sensor and let it hang to air dry for another 10 minutes.
l
The test is satisfactory if an alarm condition or other event related to the hydrocarbon sensor of the
device occurs. If the test results are unsatisfactory, replace the sensor.
l
Disconnect the Hydrocarbon Sensor from the I.S. terminal strip in the controller. The test is satisfactory
if an alarm condition occurs.
l
Connect the sensor back to the I.S. terminal strip.
l
Short across the power and signal terminals. This test is satisfactory if NO alarm condition occurs.
If the controller does not sense the alarm conditions simulated by these tests, look to see if the thresholds and
alarms are correctly programmed in the system. A sensor or wiring fault will cause a system alarm. Do a
continuity test in the wiring and junction boxes. Make sure there is continuity with no short circuits.
Functional Test - Water Sensor of the Device
l
Put only the end of the sensor into
tap water
. The test is satisfactory if an alarm condition or other event
related to the water sensor of the device occurs.
l
Disconnect the Water Sensor from the I.S. terminal strip in the controller. The test is satisfactory if NO
alarm condition occurs.
l
Connect the sensor back to the I.S. terminal strip.
l
Short across the power and signal terminals. This test is satisfactory if an alarm condition occurs.
Doc. No.: M2010-EU Rev.: 13
Page 81 of 149