National Metrological Verification Regulations of the People's Republic of China
Scope
This procedure applies to the initial calibration, subsequent calibration and in-use inspection of large mass comparators (hereinafter referred to as comparators). The testing of main metrological properties in type evaluation and prototype testing can be performed with reference to this procedure.
JJG(铁道) 109-2006 Referenced Document
JJF 1059-1999 Evaluation and Expression of Uncertainty in Measurement
JJG 555-1996 General Verification Regulation for Nonautomatic Weighing Instrument