Just considering the cost, if you verify the instruments in your factory according to the verification method, then you must strictly follow the verification procedures. In that case, first of all, you need to buy more than one standard measuring instrument required by laws and regulations. Secondly, you have to check these standard measuring instruments off campus every year. Calculated, your cost is definitely much higher than the cost of sending it to an outside school. Why?

The calibrator can be calibrated according to the calibration specification. If there is no calibration specification, they can refer to the verification regulations or write their own calibration specifications for internal use according to the actual situation, so the cost is much lower.

In fact, neither inspectors nor calibrators are the most cost-saving certificates for enterprises! The most economical thing is the internal auditor certificate!