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 3/13)
Character Range: 113766–116788

published by the American Gas Association in August 1992, sets out a manner that ensures that the maximum uncertainty of the discharge coefficient is not greater than ±1.5%.
 (2) If the measuring equipment has flow devices that use turbine measuring 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 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 for 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 measuring equipment of a category specified in column 2 of the table in subsection 1.19G(4) must, wherever possible, be calibrated for pressure, differential pressure and temperature in accordance with the requirements specified in column 4 for the category of equipment specified in column 2 for that item. The calibrations must take into account the effects of static pressure and ambient temperature.

1.19L  Flow computers—requirements
  For paragraph 1.19J(b), the requirement is that the flow computer that is used by the equipment for measuring purposes must record the instantaneous values for all primary measurement inputs and must also record the following outputs:
 (a) instantaneous corrected volumetric flow;
 (b) cumulative corrected volumetric flow;
 (c) for turbine and positive displacement metering systems—instantaneous uncorrected volumetric flow;
 (d) for turbine and positive displacement metering systems—cumulative uncorrected volumetric flow;
 (e) super‑compressibility factor.

1.19M  Gas chromatographs
  For paragraph 1.19J(c), the requirements are that gas chromatographs used by the measuring equipment must:
 (a) be factory tested and calibrated using a measurement standard produced by gravimetric methods and traceable to Australian legal units of measurement; and
 (b) perform gas composition analysis with an accuracy of ±0.25% for calculation of relative density; and
 (c) include a mechanism for re‑calibration against a certified reference gas.

Part 1.3—Method 4—Direct measurement of emissions

Division 1.3.1—Preliminary

1.20  Overview
 (1) This Chapter provides for method 4 for a source.
Note: Method 4 as provided for in this Part applies to a source