(a) A prover shall meet all of the design, material and construction criteria contained in one of the following:
- (1) NIST Handbook 105-3;
- (2) NIST Handbook 105-4; or
- (3) NIST Handbook 105-7.
(b) The size of a prover used for testing and or calibration of retail and wholesale liquid measuring devices shall be as follows:
- (1) A prover with a capacity of not less than 5 gallons shall be used if the maximum discharge rate of the device is equal to or less than 19 gallons per minute; and
- (2) A prover with capacity equal to or greater than the volume of the product delivered after a one minute test flow shall be used when the maximum discharge rate of a device is rated at more than 19 gallons per minute.
Source. (See Revision Notes #1 and #2 at chapter heading for Agr 1400) #12424, eff 12-1-17