National Metrological Verification Regulations of the People's Republic of China
Scope
This calibration procedure stipulates the technical requirements, calibration conditions, calibration items, calibration methods, processing of calibration results and calibration cycle of AC digital voltmeters. This calibration procedure is applicable to the calibration of the average and effective value AC digital voltmeters that are newly manufactured, newly purchased, in use and after repair. It is also applicable to the calibration of the AC voltage function in digital multimeters and digital panel meters.