"JJG (Light Industry) 62-2000 Paper and Cardboard Smoothness Meter" is a standard for the verification and use requirements of electronic Buick smoothness meters. This specification is not exactly equivalent to ISO5627:1984, but covers the technical requirements for calibrating and inspection of electronic smoothness meters, including vacuum pressure gauge errors, vacuum container volume errors, intake air volume errors, etc. The standard specifies in detail the structure, Measurement performance, verification conditions and methods of verification of the smoothness meter to ensure the Accuracy and Reliability of the instrument. It is suitable for the initial verification, subsequent verification and inspection in use of electronic smoothness meters. The verification period specified by the standard is generally one year to ensure the accuracy and Stability of the instrument during use.