| 摘要 |
A method and apparatus for proving and factoring a meter stack on a flow pipe. The meter stack preferably includes a meter, temperature compensator, and counter and in accordance with the present invention, the meter is positioned within the flow pipe for rotation about a first axis in response to fluid flow through the pipe. The temperature compensator is then driven by the rotating member through a first plurality of gears and the compensator in turn drives the counter through a second plurality of gears. Downstream of the counter gears is a final counter shaft which is mounted for rotation about a second axis and which drives the number wheels of a digital read out. In the preferred embodiment of the invention, a right angle drive is taken off the final counter shaft and the amount of angular rotation of the shaft is measured with a high resolution pulser while a known volume of liquid flows through the meter. The high resolution pulser measures on the order of the magnitude of at least 100 and preferably 1000 times smaller than the smallest incremental read out of the number wheels. By then comparing the measured amount of angular rotation of the counter shaft against a predetermined amount representing a true reading of the known volume, the meter stack from the meter through the counter shaft can be proven; and, when necessary, an adjustment factor for the entire meter stack can be determined.
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