1.1 本试验方法包括使用连续记录热量计进行测定( 注1 )在900至1200 Btu/标准英尺的天然气范围内生产或销售的燃料气的总热值（加热）中 3. . 注1: 1957年，美国国家标准局在美国气体协会赞助的一项研究项目下，对卡特勒-哈默记录气体热量计在用于高热值气体时的准确性进行了广泛调查。 1.2 本试验方法涵盖的受试者见以下章节: 小节 空气-气体比率试验 11 仪器 5. 计量基础 14 冷平衡试验 10 复杂因素补偿 13 气体样品的条件 7. 定义 2. 仪器的安装 6. 维修 附录X1 操作注意事项 附录X2 仪器的操作和检查 9 精确 15 范围 1. 意义和用途 4. 量热计的标准化 12 氢量热仪的初步标准化 8. 试验方法总结 3. 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本试验方法提供了一种连续测量燃气总热值的准确可靠方法，用于法规遵从性、监管转移和过程控制。

1.1 This test method covers the determination with the continuous recording calorimeter ( Note 1 ) of the total calorific (heating) value of fuel gas produced or sold in the natural gas range from 900 to 1200 Btu/standard ft 3 . Note 1: An extensive investigation of the accuracy of the Cutler-Hammer recording gas calorimeter, when used with gases of high heating value, was made by the National Bureau of Standards in 1957 under a research project sponsored by the American Gas Association. 1.2 The subjects covered in this test method appear in the following sections: Sections Air-Gas Ratio Test 11 Apparatus 5 Basis of Measurement 14 Cold Balance Test 10 Compensation of Complicating Factors 13 Condition of Gas Sample 7 Definitions 2 Installation of Apparatus 6 Maintenance Appendix X1 Operating Precautions Appendix X2 Operation and Checking of Apparatus 9 Precision 15 Scope 1 Significance and Use 4 Standardization of Calorimeter 12 Standardization, Preliminary, of Calorimeter by Hydrogen 8 Summary of Test Method 3 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method provides an accurate and reliable method to measure the total calorific value of a fuel gas, on a continuous basis, which is used for regulatory compliance, custody transfer, and process control.