LiquidWatch Installation Manual
35
Appendix
System Testing
It is recommended that the Liquidwatch system be tested at periodic intervals to insure that the system is
operating properly. The following tests should be performed yearly or in accordance with Federal, State or other
Local requirements that may require a shorter test interval.
Relay, Light and Alarm Test
This test will deenergize all relays, illuminate the front panel red LED, and activate the alarm horn. This is the
“Test Mode” function listed in the Configuration section of this manual.
On the LiquidWatch panel, select function 5, Configuration, from the Main Menu and press “Enter”. Function 1 in
the Configuration Menu is Test Mode. Select this function and then press the left arrow key to test the system.
This should deenergize the relays, illuminate the red LED and activate the horn. Press the right arrow key to turn
off the LED and horn and energize the relays. Press the Enter key to return to the Configuration Menu.
Probe Tests
Individual probes should be tested periodically to verify they activate properly. Refer to section 3.7, “Probe Tests”
in this manual for details if the probes do not activate.
PHLR-LW Series Probes
The PHLR probes can be tested by immersing the probe in a sample of the liquid that is being
monitored. The panel should illuminate the red alarm LED, switch the relay state, and sound the alarm
when the leak is detected. After the test the probe sensor elements can be cleaned following the
instructions in section 3.6.1 of this manual. The sensor elements can also be easily replaced.
As an alternative, the probe can be tested in Coleman fuel, or naphtha. In that case, the probe can be
opened after the test and the sensor element will reset in a few minutes.
The response time is typically less than 1 minute for gasoline and most solvents and less than 5 minutes
for diesel fuel.
PHL-LW Probe
The PHL probe should only be tested in a volatile hydrocarbon liquid. Coleman camp fuel, or naphtha, is
a readily available choice. Exposure to diesel fuel and similar non-volatile liquids may require
replacement of the probe. Refer to section 3.7.1 of this manual for details for testing and cleaning the
PHL probe. The response time is typically less than 1 minute for detectable hydrocarbon liquids.
PWS-LW Probe
The PWS probe can be tested in any conductive water. It will not respond to deionized water or distilled
water. Shake the water out of the probe to reset it.
PFS-LW, PSTV-LW and PTHL-LW Probes
These float switch type probes can be inspected and tested by inverting the probe and verifying the float
slides freely to the active position and the system detects the float movement. Restoring the probe to the
original orientation should reset the probe. If the float does not slide freely, the float should be cleaned
or replaced.
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