5. Calibration conditions

5.1 Temperature

The temperature of the gauge and that of the part to be tested must be substantially identical, and all the closer to the reference temperature (20°C) that their coefficients of expansion differ.

5.2 Operating force

A Between gauge, applied by hand without exerting excessive force, must be able to pass over or through the element it is checking.

A N'Entre Pas gauge, applied by hand without exerting excessive force, must not be able to pass over or into the...