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当前国内通信电缆的维护几乎都采用气压维护法.施工及维护人员需要不时测取电缆气压读数,习惯上一直沿用机械气压表,其满刻度约2kg/cm~2,分辨力为0.1kg,对于0.1kg以下只能估读.由于刻度太粗,准确度和一致性差,在测量气压的日变化或检查微漏气时,常常带来极大困难.对于机械式气压表,大多使用实验室用石英玻璃气压表,这种表高达60cm,非常娇嫩,极不适应野外操作使用.袖珍式数字气压表分辨力高、精度高、稳定性好、体积小、重量轻、耗电省、使用方便.将来作进一步改进,加上适当的接口,还可供大中市局作气压的实时监测记录之用.下面我们对这种仪表作一简要介绍.
At present, almost all the maintenance of communication cables in China adopts the pressure maintenance method, and the construction and maintenance personnel need to measure the cable pressure readings from time to time. The mechanical barometer has always been used. The full scale is about 2 kg / cm ~ 2 and the resolution is 0.1 kg. 0.1kg or less can only be read as the scale is too thick, the accuracy and consistency of the poor, the diurnal changes in the measurement of air pressure or micro-leak, often bring great difficulties for mechanical barometer, mostly used in laboratory Quartz glass barometer, this table up to 60cm, very delicate, very uncomfortable with field operation. Pocket digital barometer high resolution, high precision, good stability, small size, light weight, power consumption, easy to use. In the future to further improve, with the appropriate interface, but also for the Office of the Bureau for the pressure of real-time monitoring records purposes below we make a brief introduction of this instrument.