如何檢定壓力表的誤差
壓力表的外觀檢查之前小編已經介紹過了，今天小編為大家介紹如何檢定壓力表出現的誤差。
壓力表的誤差主要有三種，分別是回程誤差、示值誤差及輕敲位移。
1.回程誤差
回程誤差也稱為滯后誤差，是指壓力表進行正向和反向測量時，指示值不會完全相同，這種便稱為滯后誤差。對同一點檢定時，升壓或者降壓
2.示值誤差
示值誤差是指測量值與被測量值的實際值之差。檢定示值誤差可以按照原來標有的數字分度線進行，隨后逐漸平穩的升壓或者降壓，升到或者降到一定值后，切斷壓力源，再按原檢定點平穩的升或降壓。
3.輕敲位移
檢定測定點時，在升壓或降壓檢定時，輕敲壓力表的表殼，此時壓力表的指示值應小于規定誤差的一半。
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