This position should be engaged in the testing of measuring instruments in use, such as going to the hospital to check whether the electrocardiograph, B-ultrasound, laser generator and other measuring instruments in use are qualified, or the measuring instruments sent by the unit for inspection Whether it reaches the corresponding accuracy level; generally speaking, in addition to understanding the content involved in the national metrology law, you need to know the relationship between the value transfer, that is, the relationship between the standard instrument and the grade of the measuring instrument being calibrated, and a certain Practical ability.