Split Compartment Testing (Continued) - TCS 700-30 Installation, Operation & Maintenance Manual

Split Compartment Test (Continued)
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 test from a compartment (ideally the largest compartment) containing an amount of fuel
equal to or less than the nominal capacity of the prover being used. Operate the meter at the
normal full flow rate until the compartment is empty. There are several methods for determining that
the compartment is empty. There may be a significant change in the sound of the pump. There may
be visual evidence that the compartment has run dry. The meter register may stop entirely or may
begin to count erratically (pause, resume running, then pause, then run again.)
2) Continue the test until the meter indication stops entirely for at least 10 seconds. If this occurs,
proceed to Step 3. If the meter indication fails to stop entirely for a period of 10 seconds, continue to
operate the system in this condition for 3 minutes.
3) Close the valve from the empty compartment, and if top filling, close the nozzle or valve at the
end of the delivery hose. Stop the pump and load sufficient product from the alternate source into the
supply compartment that feeds the meter being tested. Allow a brief time for the product to stand in
the compartment to allow entrained vapor or air to escape.
4) Open the compartment valve and restart the pump without 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 attire and protection is required, and always use caution.
5) Continue delivering product at the normal full flow rate until the liquid level in the prover reaches the
nominal capacity.
6) Close the delivery nozzle or valve and stop the meter. Allow any entrained air to settle, then read the
prover sight gauge.
7) Compare the meter indication with the actual delivered volume in the prover.
8) Calculate the meter error. Apply the Product Depletion Test Tolerance to determine whether the
meter error is within acceptable limits. Refer to NIST Handbook 44 for further information.
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TCS900003, Rev.6
04/26/2016