近年来,我们多次对辖区内车用压缩天然气加气站使用的贸易结算用车用压缩天然气(CNG)加气机(以下简称“加气机”)进行计量监督检查,发现法定计量检定机构在检定加气机给加气机设定密度值时,采用的经验密度与实际密度有较大差异,造成了加气机计量不准确而有损用户合法权益。下面就发现的一些问题,谈谈笔者对加气机密度设置和管理工作的思考。车用压缩天然气加气机的计量系统核心是质量流量计,国家计量检定规程明确其主显示值为千克 In recent years, we have repeatedly conducted supervisory inspection of CNG refueling vehicles for trade settlement (hereinafter referred to as “refueling machines”) used in CNG refueling stations under the jurisdiction and found that statutory measurement When verifying the set density value of the dispenser to the dispenser, the verification agency has a large difference between the empirical density and the actual density, which results in inaccurate measurement of the dispenser and damages the legitimate rights and interests of the user. Here are some of the problems found, talk about the author on the filling machine density setting and management thinking. Vehicle CNG filling machine metering system is the core mass flow meter, the national metrological verification procedures clear its main display value is kg