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JJG577-2005《膜式燃气表》检定规程规定燃气表必须进行密封性试验,输入1.5倍最大工作压力,持续时间为3min,燃气表不得漏气,否则判定为气密性不合格。但是,在JJG577-2005中并未对检定原理或使用何种检定装置进行规定,由于基于“压力变化法”原理的检定装置价格适中、操作便捷,成为基层燃气表检定机构的首选。基于该原理设计的检定
JJG577-2005 “Membrane Gas Meter” test procedures require gas meter must be sealed test, enter 1.5 times the maximum working pressure, the duration of 3min, the gas meter shall not leak, otherwise judged as air tightness failed. However, JJG577-2005 does not specify the verification principle or the type of verification device used. Since the verification device based on the principle of “pressure variation” is affordable and easy to operate, it becomes the first choice of the primary gas meter verification agency. Based on the principle of design verification