这和振动的标准是一样的,不能绝对。我也有一红外教材,将此分为三级:
Class A---A very serious anomaly that requires immediate attention ,example : Absolute temp over 80(),or delta T over 30K
Class B---a serious anomaly that requires attentions as soon as possible , example: delta T over 5~30K
Class C---an anomaly that requires monitoring and a check-up at the earliest convenient time , example: delta T up to 5k