The SF6 gas density relay calibrator is an important component used to monitor changes in SF6 gas density within the SF6 switch body during operation. Due to the infrequent action of the SF6 gas density relay calibrator in field operations, it often becomes inflexible and exhibits poor contact after a period of time. Additionally, the temperature compensation performance of the density relay may deteriorate. Sudden changes in ambient temperature can frequently lead to the misoperation of the SF6 density relay calibrator. Therefore, the DL/T596-1996 Preventive Test Code for Power Equipment stipulates that each user of SF6 switches must regularly calibrate the SF6 gas density relay calibrator.
The SF6 density relay calibrator is developed in accordance with the DL/T259-2012: Calibration Specification for SF6 Density Relay Calibrator, issued by the National Energy Administration.