JJG (Light Industry) 63-2000 "Tear tester verification procedure" applies to the verification of paper and Cardboard tester with a maximum test force of not more than 16000 mN. The procedure is based on the principles and technical requirements of ISO 1974:1990 and covers the structure, performance and calibration method of the tester. It specifies the performance requirements of the tester such as force indication Precision, fan-shaped support shaft friction resistance and pointer friction resistance. The verification content includes instrument Appearance, operating performance, paper cutting mechanism, structural characteristics geometric parameters, etc. The instrument that passes the verification will be issued a certificate, and the unqualified instrument will be issued a notice and marked with the unqualified item. The verification period is one year.