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See Chinese contents: GB/T 31890-2015 GB/T 31890-2015: Electronic screw weigher
This standard specifies the terms, product models, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of electronic screw weighers (also known as screw reamer scales, screw feeder scales, hereinafter referred to as ?¡ãscrew weighers?¡À). This standard also provides standardized requirements and test procedures for testing the metrological or technical characteristics of screw weighers in a traceable manner. This standard is applicable to the continuous accumulating automatic weighing apparatus (electronic screw weighers) of the screw conveyor type, which works in a continuous weighing method by using the principle of gravity, is used with single speed, multi-speed, or variable-speed screw conveyors together, and can determine the flow rate and cumulative mass of bulk materials.
