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Title: Transfer Proving
Author: F. J. Mehall
Source: 1966 Appalachian Gas Measurement Short Course
Year Published: 1966
Abstract: In the measurement of any quantity, we are concerned with accuracy and ease of measurement. Quite often one is sacrificed to obtain the other but as long as the measured quantity is within accepted limits, ease of measurement is predominant. Examples of accuracy and ease of measurement, somewhat out of proportion to each other, aie found in OLM automobile. The oil level is measured with a dip stick, a method which gives good accuracy but involves several time consuming operations. The gasoline gage is less accmate than the dip stick method, but is much more convenient. The least accurate of all, but by far the easiest method of measiucment, is the generator indicator light. Either the generator is developing sufficient energy or it is not. No indication is given of the amount of energy developed only a go or no go condition is present. In measuring the accuracy or proof of gas meters, stress has. by necessity, been placed on the accinucy of obtaining the proof. We are required to measure an error so small and affected so greatly by changing parameters that our method of measurement is quite involved. We have sacrificed ease of measurement to obtain accuracy. A design goal that becomes immediately apparent then is to have a device to measure the proof of a gas meter with a high degree of accuracy and to do it with ease.

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