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一、某些设备的检查与安装1.压力表:压力表的种类很多,根据水电建设勘测工作中需要,以最大压力值3公斤/公分~2为宜;因为我们一般采用综合压力是0.5、1.0、1.5公斤/公分~2,压力值较大的压力表,精度不合要求。压力表的校正,是不可缺少的工作。校正的方法很多,其中以水银柱压力计为标准进行校正为最好,若以普通压力表为标准,用油压的方式进行校正,就远不及用直接水柱法来得准确可靠。所谓直接水柱法,就是用一定的实际水柱为标
First, the inspection and installation of certain equipment 1. Pressure gauge: Many types of pressure gauges, according to the needs of hydropower construction survey work, the maximum pressure value of 3 kg / cm ~ 2 is appropriate; because we generally use the integrated pressure is 0.5, 1.0, 1.5 kg/cm2, pressure gauges with larger pressure values, accuracy is not desirable. The correction of pressure gauges is an indispensable task. There are many methods for calibration, of which the mercury column pressure gauge is the best calibration standard. If the standard pressure gauge is used as the standard, the correction by oil pressure is far less accurate and reliable than the direct water column method. The so-called direct water column method uses the actual water column as a standard.