Calibration Weight Carts

1 Page 1 SOP 33 – 2019 Page 1 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 SOP 33 Standard Operating Procedure for Calibration of Weight Carts 1 Introduction This Standard... Open at page → 2 Page 2 SOP 33 – 2019 Page 2 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Standards. Ensure the availability of suitable working standards or recently calibrated (and unu... Open at page → 3 Page 3 SOP 33 – 2019 Page 3 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Equipment /Apparatus/Assistance A balance, scale, or load cell with suitable resolution and repe... Open at page → 4 Page 4 SOP 33 – 2019 Page 4 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 A basic knowledge of weight carts, including the braking system and operating controls is requir... Open at page → 5 Page 5 SOP 33 – 2019 Page 5 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Weight carts that repeatedly demonstrate excessive “as found” out-of- tolerance conditions from... Open at page → 6 Page 6 SOP 33 – 2019 Page 6 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 the largest and smallest differences. Record the range information in a suitable control chart f... Open at page → 7 Page 7 SOP 33 – 2019 Page 7 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Tolerances for weight carts (See also NIST Handbook 105- 8). Tolerances are calculated as 0.035... Open at page → 8 Page 8 SOP 33 – 2019 Page 8 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 standard deviation of the process is calculated each time a weight cart is calibrated. A minimum... Open at page → 9 Page 9 SOP 33 – 2019 Page 9 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 10 Calibration Certificate Prepare a Calibration Certificate according to SOP 1. Report the mean... Open at page → 10 Page 10 SOP 33 – 2019 Page 10 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Appendix A Sample Calibration Certificate for Weight Cart Test Number: Date Issued: Date of Cal... Open at page → 11 Page 11 SOP 33 – 2019 Page 11 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 checklist may contribute measurement errors that are significant if not properly maintained dur... Open at page → 12 Page 12 SOP 33 – 2019 Page 12 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Inspection Checklist The weight cart was cleaned and painted and allowed to come to thermal and... Open at page → 13 Page 13 SOP 33 – 2019 Page 13 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Inspection Checklist for Weight Cart Test Number: Date of Inspection: Manufacturer: Date of Man... Open at page → 14 Page 14 SOP 33 – 2019 Page 14 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Appendix B Recommended Method for Intermediate Verification of Mass Values for Weight Cart User... Open at page → 15 Page 15 SOP 33 – 2019 Page 15 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 2.3. Standards. Class F field standards are used if they are within the prescribed calibration... Open at page → 16 Page 16 SOP 33 – 2019 Page 16 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 7. Tolerance and Evaluation The observed estimated error must be less than one third of the sma... Open at page → 17 Page 17 SOP 33 – 2019 Page 17 of 17 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Example of Intermediate Verification Procedure and Calculations A. A 2000 lb weight cart is to... Open at page →