Hydrocarbon Liquid/Water Sensor - Functional Test and Remove Contam-
ination
IMPORTANT: It is recommended to only do the procedures below when it becomes
necessary and only as a last alternative. These procedures can cause a decrease in the
original electrical resistance of the polymer. If possible, speak with a certified OPW-FMS
technician before you do these procedures.
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
M2050-PLUS MagLink LX Plus Installation Manual | Dover Fueling Solutions 96
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