Amendment 1 to NZS 5259:2004 was published in November 2009 and developed so that the Standard can be cited in the revised Gas Regulations.
Changes to Table 3 of NZS 5259 have been made so that it conforms to the accuracy of conversion requirements given in the current regulation 9. Additionally, changes have been made to the energy conversion section to clarify accuracy requirements, and the competency requirements have been updated.
Also, a small number of technical corrections have been included in this amendment. Two new appendices have been introduced: a new Appendix B which provides guidance for low pressure accuracy of turbine meters calibrated at high pressure and Appendix N to provide guidance for time-stamped data.
Note: The purpose of NZS 5259 is to provide performance-based requirements for gas measurement that are useful, measurable, and repeatable as a minimum standard for the gas sector.
Part 1 provides the performance requirements for gas measurement systems required to ensure that the legislative requirements for gas measurement are met.
Part 2 provides more detailed requirements for the design, testing, installation, and operation of the gas measurement system as a means of compliance with Part 1.