OPW M2010-EU, Installation Manual, Page: 72 / 149

Test the Optical Sensor
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.
IMPORTANT:
Make sure to test the Optical Sensor in a dark area. The sensor's optical
element is light sensitive. Light can cause the sensor to not test accurately.
Test the Water Sensor of the Device
l
Put the sensor fully into water. The test is satisfactory if an alarm condition or other event related to the
water part of the sensor occurs.
l
Remove the sensor from the water. Make sure that the controller is not in an alarm condition.
Test the Hydrocarbon Liquid Sensor of the Device
l
Put the sensor fully into a non-conductive hydrocarbon (or equivalent) liquid. The test is satisfactory if
an alarm condition or other event related to the hydrocarbon part of the sensor occurs. If the test results
are unsatisfactory, replace the sensor.
l
Remove the sensor from the hydrocarbon liquid. Make sure that the controller is not in an alarm
condition.
If the controller does not go into an alarm condition, look to see if the thresholds 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.
TIP: This sensor can be cleaned with a dry cloth and put back into service again immediately.
Doc. No.: M2010-EU Rev.: 13
Page 72 of 149