Clause 4. Calibration is a comparison of monitoring results at that location. The environment includes a standard calibration method, which is not the same as trading machinery and equipment. Cannot guarantee identical machinery and equipment guys.
Article 4 is designed to check the calibration measurements are compared at the time, the place, the environment, including how to calibrate the standard. Unlike trading equipment. I can not guarantee that the same machines.
Article 4 calibration was the examination comparison measurement at that place environment. At that time, including the method of calibration of a standard Which is not the same as trading machinery equipment. It can"t be guaranteed as machinery and equipment.