Is all measuring equipment critical? Do all calipers used by operators need to be calibrated?

Critical? All need to check? The key is to look at the use of the situation, calipers should also look at the use of the link is important, against the measurement of the law, for environmental monitoring, trade settlement, safety and security, medical and health care in the field, should be mandatory verification. Against the enterprise energy saving, quality certification and other related requirements, should be certified. Operator's link is not important, if you can compare yourself, the heart on the line.