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依据JJG165-2005《钟罩式气体流量标准装置检定规程》,目前国内通常采用静态容积法和尺寸测量法检定钟罩。在实际应用中这两种方法的检定结果存在一定的差异。参考资料显示,用两种方法检定同一个钟罩,结果可能相差0.41%;检定100L钟罩时,两者相差0.98L左右;相同条件下的钟罩密封液分别使用白油和水检定燃气表,示值误差相差约0.75%;不同温度两种方法检定钟罩时,钟罩的毫米容积分度值存在
According to JJG165-2005 “bell-type gas flow standard device verification procedures”, at present, the domestic commonly used static volumetric method and size measurement bell jar. There are some differences between the two methods in practical application. Reference materials show that the two methods used to test the same bell, the result may be a difference of 0.41%; test 100L bell, the difference between the two about 0.98L; under the same conditions Bell Seal liquid were measured using white oil and water gas meter , The difference between the indication error of about 0.75%; different temperature of the bell when the two methods of verification, bell millimeter volume index value exists