Section 15-2354. BELL PROVERS

2354.1Each gas corporation testing meters with bell provers shall do the following:

(a)Own and maintain, or have access to, one (1) or more approved bell type meter provers of appropriate size, and all other equipment necessary to test meters, which shall be installed in the meter room;

(b)Provide the means to maintain the temperature of the liquid in the bell provers at substantially the same level as the air temperature in the prover room. The maximum difference in temperature shall not be more than two degrees Fahrenheit (2° F);

(c)Maintain each bell prover in good condition and correct adjustment shall be accurate within plus or minus three tenths of one percent (± 0.3%) at each point used in testing meters; and

(d)Calibrate each bell prover at least once every three (3) years. If moved or disassembled, the accuracy of a bell prover shall be determined by using one (1) or more of the methods as follows:

(1)By comparison to a one cubic foot (1 ft,³) cubic foot standard calibrated by the National Bureau of Standards;

(2)By strapping with a calibrated tape whose accuracy is traceable to the National Bureau of Standards; or

(3)By comparison to an approved transfer standard for a bell in excess of five cubic feet (5 ft.3).

2354.2Each gas corporation testing meters by standards other than bell provers shall do the following:

(a)Test meters which are too large for testing on a five cubic foot (5 ft.3) bell prover by other approved methods and by use of approved working standards;

(b)Maintain the approved working standards in good condition and correct adjustment, with a high degree of repeatability, and capable of determining the actual proof of the meter under test to within plus or minus five tenths of one percent (± 0.5%) at rates of flow between fifteen percent (15%) and one hundred percent (100%) of rated capacity of the meter under test; and

(c)Test the approved working standards for accuracy by comparison with an acceptable standard at least once every three (3) years.

2354.3Each standard shall be accompanied at all times by a certificate or calibration card, duly signed and dated, on which are recorded the corrections required to compensate for errors found at the customary test points at the time of the previous test.

 

authority

Unless otherwise noted, the authority for this chapter is Paragraph 21 of §8 of An Act Making appropriations to provide for the expenses of the District of Columbia for the fiscal year ending June thirtieth, nineteen hundred and fourteen, and for other purposes, approved March 4, 1913 (37 Stat. 977); as amended by §2 of the Public Utilities Amendment Act of 1989, D.C. Law 8-47, D.C. Code §43-501 (1990 Repl. Vol.).

source

Final Rulemaking published at 35 DCR 7938, 7940 (November 4, 1988); as amended by Final Rulemaking published at 60 DCR 7 (January 4, 2013).