4 5.Visually inspect, from the top neck opening, the interior of the prover to ensure it is free of debris which could affect the accuracy of the liquid volume measurement. Prover Wetting Procedure :1.If the prover is clean and free of debris, fill the prover with liquid from the meter device being checked. Fill the prover until the amount on the meter reads the nominal capacity of the prover. NOTE: The prover must be filled once and drained in order to wet the internal sides of the prover body. Wetting the internals of the prover helps ensure consistency in the amount of liquid that clings to the sides, from one test to the next. 2.Open the prover drain cock to drain the prover into its holding tank. Once the cessation of main flow breaks, as viewed through the sight flow meter, wait 30 seconds and then close the drain valve. 3.The prover is now wet down and is ready for an official test. Conducting the Calibration with the 5 gallon special J prover: 1.Fill the prover until the amount on the meter reads the nominal capacity of the prover.2.Level the prover on its leveling sphere joint until the bubble in the circular level is in the center circle. 4.Compare the reading on the graduated scale to the meter reading. Document or record the difference in readings. 5.Open the prover drain valve. Once the cessation of the main flow breaks, wait 30 seconds and then close the drain valve.
CAUTION: Ensure the tank gravity drain valve is closed when draining the prover into the tank, to avoid the possibility of fuel spillage .
Seraphin® - 30 Indel Avenue – Rancocas, NJ 08073 Tel: 1-609-267-0922 Fax: 1-609-261-2546 e-mail: sales@seraphinusa.com Pub E91-4044