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Title: Testing And Adjusting Large Capacity Meters In The Field
Author: Alvin C. Casto
Source: 1982 Appalachian Gas Measurement Short Course
Year Published: 1982
Abstract: The operation of a meter is controlled by valves allowing gas to enter and exhaust from chambers in which there are movable pistons called diaphragms. The opening and closing of these valves is controlled by a mechanism actuated by the movement of the diaphragms. The proper time of valves opening and closing is determined by the construction of this mechanism. If each chamber admits and exhausts the same amount of gas each time its respective valve opens and closes, the volume of gas passing through the meter in one revolution is easily calculated by multiplying the volume displaced by one chamber by the number of chambers in the meter. It may then be determined how many revolutions are required for one cubic foot. A gear train is then designed to convert the revolutions of the meter to cubic feet and an index applied to record the total volume.

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