1, in choosing a gas flow timing, should pay attention to the choice of meter, the measuring accuracy of lower limit in the table on the range, to ensure the measuring accuracy.
2, in choosing a gas flow timing, calculated maximum flow rate Qmax and method for determining the minimum Qmin: 1)
When the bottom of the flow meter
, only when a gas equipment, equipment of minimum gas load after calorific value conversion of gas for gas meter, the minimum flow Qmin calculation, similarly reduced the maximum flow rate Qmax calculation.
When the bottom of the flow meter, has more than one gas equipment measurement, gas equipment group from the lower pole of the gas meter shall be the actual minimum gas load (
After calorific value conversion of gas as the smallest calculation flow Qmin;
The largest gas equipment group, the total gas load after calorific value conversion gas Qmax biggest calculation flow.
Bottom is equipped with many sets of gas equipment when the same flowmeter, if a single gas meter range cannot be covered gas equipment and the minimum flow, maximum flow rate should be considered for grouping gas equipment configuration gas meter or for special gas equipment configuration alone gas meter.
Gas equipment under normal conditions of gas load is the main basis of gas meter selection, extreme use state (
The use of gas equipment accident or less)
When the gas load is only used for gas meter type selection reference.
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