The precision of liquid column manometer was described. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.
叙述了液柱式压力计的精度，对U形管压力计和双管差压计的正确使用方法及误差修正做了简要分析。
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.
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.
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。
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