Total Control Systems 700-20 Engineering Manual page 20

Single Compartment Test Procedure:
The test of single-compartment tanks is easier to accomplish if there is a quick-connect hose
coupling between the compartment valve and the pump that supplies product to the meter. If the
system does not have quick-connect couplings between the compartment and the meter, an
additional source of sufficient product at the test site is required.
Without a quick-connect coupling:
1. Begin the tests with the compartment containing an amount of fuel equal to or less than one-
half the nominal capacity of the prover being used. Operate the meter at the normal full flow rate
until the supply tank is empty. There are several methods for determining that the tank is empty.
There may be significant change in the sound of the pump. Someone may visually watch for the
tank to run dry. The meter may stop entirely or may begin to move in jumps (pause, resume
running, the pause, then run again).
2. Continue the test until the meter indication stop entirely for at east 10 seconds. If the meter
stops for at least 10 seconds, proceed to step 3. If the meter indication fails to stop entirely for at
least 10 seconds, continue to operate the system for 3 minutes.
3. Close the compartment valve and the delivery nozzle or valve if top filling. Stop the pump and
load sufficient product from the alternate source into the supple to compartment for the meter
being tested. Allow the product to stand in the compartment for a brief time to allow entrained
vapor or air to escape.
4. Open the compartment valve and restart the pump without pump resetting the meter to zero.
Carefully open the nozzle of valve at the end of the delivery hose. Pockets of vapor or air may
cause product to splash out of the prover. The test results may not be valid if product is splashed
out of the prover. Appropriate eye protection is required, but caution is still necessary.
5. Continue delivery of product at the normal full flow rate until the liquid level in the prover
reached the nominal capacity of the prover.
6. Close the delivery nozzle or valve, stop the meter, and allow any foam to settle, then read
prover sight gauge.
7. Compare the meter indication with the actual delivered volume in the prover.
8. Calculate the meter error, apply Product Depletion test tolerance, and determine whether or
not the meter error is acceptable.
- 19 -