Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:4:p3
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 4 (pt 3/7)
Character Range: 203448–206483

systems, the flow devices must be installed in a manner that ensures that the maximum uncertainty of the flow measurement is not greater than ±1.5%.
Note: The publication entitled AGA Report No. 8, Compressibility Factor of Natural Gas and Related Hydrocarbon Gases (1994), published by the American Gas Association on 1 January 1994, sets out a manner of installation that ensures that the maximum uncertainty of the flow measurement is not greater than ±1.5%.
 (3) If the measuring equipment has flow devices that use positive displacement measuring systems, the flow devices must be installed in a manner that ensures that the maximum uncertainty of flow is ±1.5%.
Note: The publication entitled ANSI B109.3—2000, Rotary Type Gas Displacement Meters, published by the American Gas Association on 13 April 2000, sets out a manner of installation that ensures that the maximum uncertainty of flow is ±1.5%.
 (4) If the measuring equipment uses any other type of flow device, the maximum uncertainty of flow measurement must not be greater than ±1.5%.
 (5) All flow devices that are used by gas measuring equipment in a category specified in column 2 of an item in the table in section 2.31 must, wherever possible, be calibrated for pressure, differential pressure and temperature:
 (a) in accordance with the requirements specified, for the item, in column 4 of the table; and
 (b) taking into account the effects of static pressure and ambient temperature.

2.36  Flow computers—requirements
  For paragraph 2.34(b), the requirement is that the flow computer that is used by the equipment for measuring purposes must record:
 (a) the instantaneous values for all primary measurement inputs; and
 (b) the following outputs:
 (i) instantaneous corrected volumetric flow;
 (ii) cumulative corrected volumetric flow;
 (iii) for turbine and positive displacement metering systems—instantaneous uncorrected volumetric flow;
 (iv) for turbine and positive displacement metering systems—cumulative uncorrected volumetric flow;
 (v) super‑compressibility factor.

2.37  Gas chromatographs—requirements
  For paragraph 2.34(c), the requirements are that gas chromatographs used by the measuring equipment must:
 (a) be factory tested and calibrated using a measurement standard:
 (i) produced by gravimetric methods; and
 (ii) that uses Australian legal units of measurement; and
 (b) perform gas composition analysis with an accuracy of:
 (i) ±0.15% for use in calculation of gross calorific value; and
 (ii) ±0.25% for calculation of relative density; and
 (c) include a mechanism for re‑calibration against a certified reference gas.

2.38  Simplified consumption measurements—criterion BBB
 (1) For paragraph 2.29(4)(b), criterion BBB is the estimation of gaseous fuel in accordance with industry practice if the measuring equipment used to estimate consumption of the fuel does not meet the requirements of criterion AAA.
 (2) For sources of landfill gas captured for the purpose of combustion for the production of electricity:
 (a) the