Testing Procedures
Observation of Leak Detector Opening Time
10
2.
a. While the pump is running and no nozzles are dispensing, turn the FXT’s Selector Valve to the ‘Leak Test’
position.
b. Using the flowmeter valve, adjust the leak rate to the value recorded in 1f above. this will create the
equivalent desired leak rate.
c. Check the pressure reading to make sure it is still the same as in 1d above. If it is different, repeat step 1e
and 1f for the new pressure before proceeding.
3.
a. Turn off the pump and wait for dispensing to stop. Observe pump pressure fall to seating pressure.
b. Turn the FXT’s Selector Valve to the ‘Pressure Relief’ position.
c. Observe line pressure fall to 0 psi.
4.
a. Turn the FXT’s Selector Valve to the ‘Leak Test’ position.
b. Turn on the pump.
c. Observe the pressure gauge:
• A pressure of approximately 12 - 16 psi (83 - 110 kPa) or less for the FX Series (FX1 Series or FX2
Series) LLDs indicates that the LLD has reacted to the imposed leak and is in its leak sensing mode.
• A Pressure of approximately 25 psi (172 kPa) or greater indicates that the LLD did not see the leak.
d. Disconnect the FXT by first removing the orange hose, then remove the black hose. Replace the caps on
the Snap-Tap fittings.
Observation of Leak Detector Opening Time
1.
Rotate the FXT’s Selector Valve to the ’Pressure Relief’ position with the submersible pump off. Observe the
pressure fall to zero.
2.
Rotate the FXT’s Selector Valve to the ‘Pump/Line Pressure’ position.
36
5.7
7.6
9.5
11.4
13.3
15.2
17.1
19.0
38
5.8
7.8
9.7
11.7
13.6
15.6
17.5
19.5
40
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
42
6.1
8.2
10.2
12.3
14.3
16.4
18.4
----
44
6.3
8.4
10.5
12.6
14.7
16.8
18.9
----
46
6.4
8.6
10.7
12.9
15.0
17.2
19.3
----
48
6.6
8.8
11.0
13.1
15.3
17.5
19.7
----
50
6.7
8.9
11.2
13.4
15.7
17.9
----
----
Table 1. Test Leak Rate Selections
Pump
Operating
Pressure
Equivalent Leak Rates at 10 psi
Flow Rates to set at Pump Pressure
3 GPH
4 GPH
5 GPH
6 GPH
7 GPH
8 GPH
9 GPH
10 GPH
