JJG (Light Industry) 54.1-2000 "Paper Quadrant Scale Verification Regulations" stipulates the verification requirements and methods of paper quadrant scales. It is suitable for quadrant scales with Mass range 0~ 25g and quantitative range 0~ 500g/m ², covering the verification, calibrate and daily inspection of the instrument. The regulations require the instrument to have a mass weighing error of +/- 0.5% FS and a discrimination threshold of 50 mg. Verification includes Appearance Check, Zero Point Calibrate, Foot Adjustment and Identification Test, etc. The environment should be vibration-free, clean and the temperature should be between 10 ° C and 30 ° C. The verification period is generally one year to ensure the accuracy and Stability of the instrument.