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壓力表怎么看

首先應該知道壓力表外圈讀數為紅色,對應紅色單位PSI;內圈讀書為黑色,對應黑色單位MPa??磯毫Ρ頃r,應使眼睛對準表盤刻度,眼睛、指針和刻度三者成垂直于表盤的直線,待壓力穩定后讀數;若壓力不穩,指針擺動,應多讀取幾次,即讀取指針的最大值和最小值,然后取算術平均值。還應該知道inHg是英寸汞柱,bar是巴;MPa是兆帕,1MPa=145psi;PSI是磅,壓力就看MPa比較容易懂,R和數字是冷媒表的代號;冷媒壓力表的壓力和溫度有一定的對應關系。
 

免费看黄色视频

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