42.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 flowmeter, 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/20 liter Special J prover: 1.Fill the special “J” prover until the amounton the meter reads the nominal capacity of the prover.2.Level the prover on its leveling ball union untilthe bubble in the circular level is in thecenter circle. 3.Identify the volume measurement on the scale by reading the meniscus in the gauge glass. Look directly from eye level to a horizontal line tangential to the bottom of the meniscus. Record the results. 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. Gravity draining of the 115 gallon holding tanks: 1.Ensure tank gravity drain valve is completely closed. Seraphin® - 30 Indel Avenue – Rancocas, NJ 08073 2.Connect the 2” petroleum drain professional hose (provided with the vehicle) to the tank gravitydrain quick connect professional fitting, for the tank you wish to drain. Tel: 1-609-267-0922 Fax: 1-609-261-2546 e-mail:sales@seraphinusa.com Pub E91-4043