Sec. 400.8. Determination of steam meter performance

(a) When the results of two tests at a given load fail to agree within two percent, additional tests up to a total of four, shall be made at that load until agreement within two percent is obtained on any two tests. If such agreement is not obtained the meter registration shall be reported as “Indeterminate”.

(b) The percentage registration shall be reported as “Indeterminate” when for any reason there is doubt as to whether the accuracy of registration can be determined. See subdivision (c) of this section.

(c) The percentage registration shall be reported as “Non-registering” if for any reason a meter is found not registering at the specified test points. See subdivision (b) of this section.

(d) The percentage registration of the meter shall be determined by arithmetically averaging the results obtained at the specified test points, except that for condensate meters the percentage registration shall be obtained by multiplying the average of the test results at 50 percent of meter rating by two, adding the average of the test results of 100 percent of meter rating and dividing the total by three.