Total Control Systems 700-LP Series, Инструкция по установке, эксплуатации и обслуживанию

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The method of proving should be selected, and necessary provisions made, during the design stage of the
installation. Use only an accurate, specifically and scientifically designed prover. No other kind should be used.
All provers should be checked periodically for accuracy. Weights and Measures officials have been very coopera-
tive in giving assistance in checking provers.
Note: The prover capacity should be equal to at least one minute‘s flow through the meter at its maximum rate.
The prover should be set level, using the levels provided on the prover, or separate ones. This insures consistent
results when moving the prover from meter to meter. A detailed description of LP Gas test procedures may be
found in the NCWM Course 305 ―Liquefied Petroleum Gas Liquid Measuring Devices‖. Specifications and
Accuracy Tolerances are contained in Handbook 44. Tolerances are shown below.
Meter Calibration
Calibration Adjustment
One complete turn of the adjuster barrel is equal to 1 gallon in 100 gallons or 1% of delivered volume. The adjuster
body will show divisions of 1%, while the adjuster barrel has divisions of 0.02%. For volumes other than 100
gallons, the following formula may be used to calculate the Adjuster percent to increase or decrease prover volume.
Volume on Prover minus Volume on Meter Counter
Volume on Meter Counter
Tolerance
Indication of Device Acceptance Test Maintenance Test
Special Test
Wholesale or Vehicle 0.6% 1.0% 1.0%