11-5
11
Wireless Pressurized Line Leak Detection
Pressure Offset
The first step is to vent the line(s). The second step is to go to the Diagnostic Mode and run a Pressure Offset Test
for each transducer to determine its Pressure Offset value. The third step is to return to the Setup Mode and enter
the Pressure Offset determined in the tests, for each transducer.
VENTING THE LINE
1. Turn Off, lock out, tag power to the STP.
2. Vent the line to zero. IMPORTANT - The STP is actually turned On for the WPLLD test, so be sure to reseal the
lines after venting.
3. Reseal the line.
4. Turn On power to the STP. Follow the procedure below.
DETERMINING A PRESSURE OFFSET VALUE FOR EACH TRANSDUCER
Press MODE to display DIAGNOSTIC MODE, then FUNCTION until you see the message:
From the WPLLD Diag message, press STEP until you see the display below
Press ENTER and the results of the last test displays (‘No Test Data Available’ message appears if this is the first
test):
Press STEP:
To start the test, press ENTER. During the test this message appears:
The Pressure Offset test results message appears when the test ends:
You can print out the test result if you have an optional printer. If you do not have a printer, record the offset value
for the transducer. Press TANK/SENSOR and repeat the above procedure for all installed transducers.
The maximum offset pressure range is ±5 psi (±34.5 kPa). If a Pressure Offset is greater than ±5 psi (±34.5 kPa),
repeat the test. If the Pressure Offset is again out of range, either the line pressure is not completely vented or
there is a hardware problem. Refer to WPLLD troubleshooting procedures for further instructions.
OFF
WPLLD LINE LEAK DIAG
PRESS <STEP> TO CONTINUE
W 1: WPLLD NUMBER 1
P OFFSET TEST <ENTER>
W 1: PRESS OFFSET TST PSI
9-30-99 03:10AM +3.2
W 1: START P OFFSET TEST
PRESS <ENTER>
W 1: PRESSURE OFFSET TEST
MEASURING
W 1: PRESSURE OFFSET TEST
DONE - OFFSET: +XX.X PSI
