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Title: Adjustment Of Large Diaphragm Gas Meters
Author: H. K. Frome
Source: 1971 Appalachian Gas Measurement Short Course
Year Published: 1971
Abstract: Large capacity diaphragm meters are used for high volume commercial and industrial customers where other type metering is not practical due to various load conditions. These meters are excellent measuring devices when properly sized, adjusted, and installed. In many respects, such as appearance and principle of operation, the large capacity meter is simply an overgrown domestic, positive displacement meter. Since these meters are usually handled in smaller quantities than the domestic meters, shop procedures are different. Flow charts and schematics of gas meter repair and testing can become complicated because of back tracking and cross flows. However a basic chart is outlined in Figure 1 of this paper. This chart is basic, but it does coi rey the idea of the various processes. Since we are concerned with adjustments only, this discussion divides this phase into three categories. 1. Adjustments during repair. 2. Final adjustments on the prover. 3. Change in proof at higher than normal operating pressure.

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