TCS 700-30, Инструкция по установке, эксплуатации и обслуживанию

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Split Compartment Test
Purpose: A product depletion test verifies the proper operation of air elimination when the storage tank for
the product being measured is pumped dry. This test is necessary for meters that may drain a tank com-
pletely, such as a vehicle tank meter.
Multiple-Compartment Test Procedure:
1). Begin the test from a compartment (ideally the largest 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 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 may stop entirely or may begin to
move in jumps (pause, resume running, then pause, then run again.)
2). Continue the test until the meter indication stops entirely for at least 10 seconds. If the meter stops
for 10 seconds or more, proceed to step 3. If the meter indication fails to stop entirely for a period of
10 seconds, continue to operate the system for 3 minutes.
3). Close the valve from the empty compartment, and if top filling, then close the nozzle or valve at the
end of the delivery hose. Open the valve from another compartment containing the same product.
Carefully open the 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 prover.
Appropriate attire and protection is required, but caution is still necessary.
4). Continue delivering product at the normal full flow rate until the liquid level in the power reaches the
nominal capacity of the prover.
5). Close the delivery nozzle or valve, stop the meter. Allow any foam to settle, then read the prover
sight gauge.
6). Compare the meter indication with the actual delivered volume in the prover.
7). Calculate the meter error, apply Product Depletion test tolerance, and determine whether or not the
meter error is acceptable. Reference the NIST Handbook 44 for further information.