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Several requirements that should be paid attention to when selecting a pressure gauge
2011-10-13 14:44:26


生产过程 中的工 艺对测量的要求,包括准确度和量程。 First, the technical requirements of the pressure gauge in the production process for measurement, including accuracy and range. 在静态测试或 变化缓慢的情况下,规定 被测压力选用压力表 应该以 满刻度值的三分之二 最大值; 2 在脉动 或者 波动压力的情况下,被测压力 应以 选用压力表满刻度值的二分之一 最大值。 ( 1 ) In the case of static test or slow change, it is stipulated that the selected pressure gauge for the measured pressure should be two-thirds of the full scale value as the maximum value; ( 2 ) Under the condition of pulsating or fluctuating pressure, the measured The pressure should be a maximum of one-half of the full scale value of the selected pressure gauge .


现场的环境条件 来决定 比如 振动 程度 、环境温度、潮湿程度、腐蚀情况等。 Second, the selection of pressure gauges is determined according to the environmental conditions at the site , such as the degree of vibration , ambient temperature, humidity, and corrosion. 防震压力表 适用 于振动环境条件的。 For example, anti-vibration pressure gauges are suitable for vibration environmental conditions.

被测介质 来决定,比如 状态、法污程度、粘度、腐蚀性、温度、易燃和易爆程度等 等。 Third, the choice of pressure gauge is determined according to the measured medium , such as the state, the degree of pollution, viscosity, corrosiveness, temperature, flammable and explosive degree, and so on . 乙炔表、氧气表, 带有 禁油 标志 的压力表;而 耐腐蚀压力表、耐高温压力表 、隔膜压力表等 等,则是 用于特殊介质的 For example, acetylene gauges and oxygen gauges are pressure gauges with the " oil-free " mark ; while corrosion-resistant pressure gauges, high-temperature-resistant pressure gauges , and diaphragm pressure gauges are used exclusively for special media .  

选用还要适于 工作人员 观测。 Fourth, the selection of pressure gauges should also be suitable for staff observation. 所处位置和照明情况 等等来决定对压力 表径不等 的情况的 选用。 According to the location of the test and the lighting situation, etc. , the selection of the case where the diameter of the pressure gauge is different is selected.

仪表 的准确度等级 一般分为 4 个等级 分别为 0 The accuracy levels of commonly used pressure detection instruments are generally divided into 4 levels of 0 . Level 4 , 1 . 0 level, 1 . Level 5 and 2 . Level 5 . 压力表 生产工艺 准确度 考虑,也可以从压力表 最经济角度 考虑 We can consider from the accuracy of the pressure gauge production process , or from the most economical point of view of the pressure gauge . 就是我们压力表 的最大误差允许 The product of the meter's range and the accuracy level percentage is the maximum allowable error for our pressure gauge . 误差值超过工艺要求准确度 的时候 ,则 应该 更换压力仪表 高一级的准确 度为准 When the allowable error value exceeds the accuracy required by the process , the higher level accuracy of the pressure gauge should be replaced .