大家知道,在高真空和超高真空范围内校准和检定真空计是在校准室内用真空计测定的低压与直接用标准压力计测量的高压之间建立准确联系的方法来实现的。实际上这种联系可用各种不同的减压方法来实现。基于这种减压方法,有些一等标准装置正在发挥作 It is known that calibrating and verifying gauges in the high vacuum and ultrahigh vacuum range is accomplished by establishing an accurate relationship between the low pressure measured by the vacuum gauge in the calibration chamber and the high pressure measured directly with a standard pressure gauge. In fact, this connection can be achieved with a variety of different decompression methods. Based on this decompression method, some first-class standard devices are working