如何調整壓力表的誤差
當壓力表的指示誤差出現了先后快慢不同的情況時，用戶可以按照如下方法進行調整：
故障分析：所謂“先后快慢不同”是指壓力表在測量壓力的過程中，誤差不是隨壓力增大或減少而成比例的增加或減少，而是由正值逐步趨向為負值，由負值逐步趨向為正值的變化。
引起該故障的原因一般有：
（1）壓力表的機芯位置不正確，需要將壓力表的機芯調整至正確位置后才可進行測量；
（2）壓力表的刻度盤出現了傾斜的情況，檢查是否因緊固刻度盤的螺釘松動而出現的此情況，盡量將位置調整正確后，才可進行使用。
（3）檢查壓力表的指針軸是否位于彈簧管的圓弧中心，如果不在中心，也會出現中間刻度前、后示值快慢不同的情況。
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