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 4.3 Periodic Inspection. Periodic inspection of meters is required to
determine whether they are measuring accurately. The time between inspections
should be based on local conditions and the amount of use. The manufacturer's
representative in any particular area should be familiar with local conditions
and capable of assisting in the preparation of a schedule for periodic
inspection of meters.
5. ACCURACY. Accuracy limits for water meters have been established by
industry. For the meters discussed in this section, limits are based on tests
run at three different rates of flow; maximum, intermediate, and minimum. The
accuracy limits for the maximum and Intermediate rates are from 98.5 to 101.5
percent of the quantity measured. The limits for the minimum rate are from 95
to 101 percent.
4-7
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