根据工业用单圈弹簧式压力表、真空表和压力真空表检定规程JJG52—71第一项第三条的要求,对测量上限小于或等于2.5公斤力/厘米~2的压力表,用于测量气体时,应使用空气或其他惰性气体进行检定。我们在没有合适的三等标准活塞压力计和双活塞压力真空计的情况下(即使有此设备,经常用于检定工业用表 According to the industrial lap spring pressure gauge, vacuum gauge and vacuum gauge test procedures JJG52-71 the first three requirements of the upper limit of measurement of less than or equal to 2.5 kg force / cm ~ 2 pressure gauge for measuring Gases should be tested with air or other inert gas. In the absence of a suitable third-class standard piston pressure gauge and dual-piston pressure vacuum gauge (even with this equipment, often used to test industrial meters