What should you pay attention to when measuring the dew point of the compressed air with a dew point meter?

What should you pay attention to when measuring the dew point of the compressed air with a dew point meter?

When measuring the air dew point with a dew point meter, the operation is very careful and patient, especially when the measured air content is extremely low. 
The gas sampling device and the connecting line must be dry (at least dry than the measured gas), the piping connection should be completely sealed, the gas flow rate should be selected according to the regulations, and require a long enough pretreatment time.