JJG4430-1998《燃油加油机检定规程》新规程与老规程（JJG443－1986）相比，有重要变化，在出厂检验与现场检定方面，最主要的变化就是新规程明确规定了检测准确度时对流量量程比的要求，对此浅释如下：可见新规程对量程比做出的规定符合流量计准确度检测原则，且符合OIML的国 JJG4430-1998 “Fuel tanker test procedures,” the new rules and the old rules (JJG443-1986), there are important changes in the factory inspection and on-site verification, the most important change is that the new rules clearly specify the accuracy of the test Flow turndown ratio requirements, the shallow interpretation is as follows: It can be seen that the new rules of the turndown made in line with the provisions of the accuracy of the principle of flowmeter, and in line with OIML’s country