本文给出了一种电能计量装置现场校验的方法，通过对三相电能表无功计量误差的校验，可以间接地求得其表计的有功计量误差。
TA field calibration method for power metering device is given. By calibrating the error of the reactive power metering, the error of active power metering can be indirectly calibrated.
文章介绍了活塞式压力计的技术性能指标的影响因素，并对其校验方法和提高测试精度的措施进行了分析。
In this paper was introduced the factors of Influencing technical performance index of piston manometer, and analyzed the calibration and test ways of it and the measures of improving test precision.
用活塞压力计校验氧压力表时，必需采用隔离罐，用水做隔离液将活塞压力计的油隔离，使水进入氧气表中。
With piston oxygen pressure gauge, pressure gauge calibration must adopt isolation tank and water will do spacer piston pressure gauge of oil isolation, make water into oxygen table.
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