JJG (Light Industry) 54.2-2000 "Paper and Cardboard Quantitative Tester Verification Regulations" stipulates the method of verification and requirements for electronic paper and Cardboard quantitative testers (quantitative testers). Applicable to instruments with a range of 0~ 50g mass and 0~ 1250g/m ² quantitative range. The regulations cover the technical requirements of instrument Appearance inspection, mass weighing Precision, quantitative weighing Precision and zero return error. Verification includes instrument Appearance, load bias adaptability, measurement and control system functions, etc. The environmental conditions should be temperature 10 ℃~ 30 ℃, Humidity ≤ 80%. Periodic verification period does not exceed one year to ensure stable instrument performance and accurate data.