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PEIIRP1200_17 13. With the STP on and full pump pressure indicated, slowly open the test apparatus leak orifice and direct the fuel flow into a test can. 14. Ensure that fluid flow is passing through the pressure regulator to the leak orifice. With the pressure regulator, adjust the line pressure to 10 psig. Direct the fluid flow into a graduated cylinder and time for 60 seconds. Adjust the size of the test apparatus leak orifice until the desired leak rate of 189 ml/min is achieved while maintaining a line pressure of 10 psig. It may be necessary to readjust the pressure regu- lator and/or the test apparatus leak orifice sev- eral times in order to correctly set the leak rate at 189 ml/min at a line pressure of 10 psig. To expedite calibration, make coarse adjustments by measuring the volume of fluid that corre- sponds to 15 seconds (47 ml). The final calibra- tion of the test apparatus leak orifice must be conducted by measuring a fluid volume of 189 ml over the full 60 -second time frame. 15. Turn the pump off and allow the line pressure to bleed off completely (0 psig) through the test apparatus leak orifice. This should cause the leak detector to "trip" (move into the leak sensing position). Do not change the size of the test apparatus leak orifice after it has been properly calibrated in Step 14. 16. Redirect fluid flow to bypass the pressure regulator, and tum the pump on to allow the simulated leak to occur through the calibrated test apparatus leak orifice. 17. Observe that the line pressure rises to the metering pressure determined in Step 11 and remains there indefinitely with the pump running and the simulated leak occurring through the calibrated test apparatus leak orifice. The metering pressure must remain for a minimum of 60 seconds. If the line pressure rises to the full pump pressure at any time during the test, this indicates that the leak detector has fully opened and fails the test. 9.1.7 Pass/Fail Criteria. If line pressure does not increase above the metering pressure for the duration of the test with the simulated leak occur- ring, then the MLLD passes the test. If the line pressure increases to full pump pressure while the simulated leak is occurring, the MLLD fails the test. 0 peLorg If the leak detector does not reset (trip) when the line pressure is bled off to zero, the MLLD fails the test. If the STP does not properly cycle on/off under nor- mal fuel system operating conditions, the MILD fails the test. NOTE: If the leak detector initially fails, the test procedure should be repeated to confirm the initial result. 9.1.8 Restore System to Operational Condi- tion. Upon completion of the test: • Shut off power to the STP and perform lockout/ tagout procedures on the circuit breakers. Allow line pressure to bleed off to zero and close the shear valve. • Remove the test apparatus from the shear valve body and properly reinstall the plug into the shear valve test port. • Reestablish power to the STP, tum dispenser on and confirm that no leaks are present in the system. • Dispense product into the test can to remove any air from the line and confirm that full product flow is achieved. 9.2 Electronic Line Leak Detectors (ELLDs). ELLDs are commonly installed at the STP and can detect a leak in product piping between the ELLD and the solenoid valve inside product dispensers. ELLDs trigger an alarm and may shut down the STP if a leak is detected. 9.2.1 General. Use this test procedure in con- junction with the Ell manufacturer's installation and maintenance instructions. 9.2.2 Purpose. This test method is used to determine if an ELLD can detect a product line leak equivalent to 3 gph at 10 psig. 9.2.3 Description of Test. A test apparatus is typically connected to the test port on the shear valve inside a dispenser to simulate a leak in the product line equivalent to 3 gph at 10 psig. The performance of the line leak detector is observed to see if it detects the simulated leak. 9.2.4 Test Equipment. Test equipment shall include: • a test apparatus that includes a pressure gauge