Rr Test Cars

1 Page 1 SOP 27 – 2019 Page 1 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 SOP 27 Standard Operating Procedure for Railroad Test Cars Using a Master Track Scale 1 Introduction Pu... Open at page → 2 Page 2 SOP 27 – 2019 Page 2 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 The scale, process, and standards must be evaluated to ensure that the combined standard uncertainties... Open at page → 3 Page 3 SOP 27 – 2019 Page 3 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Railroad test cars must be completely dry, with no ice or moisture on the surface or under carriage of... Open at page → 4 Page 4 SOP 27 – 2019 Page 4 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Equipment / Apparatus A track scale in good operating condition, with a current calibration certificate... Open at page → 5 Page 5 SOP 27 – 2019 Page 5 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Pre-calibration Inspections Inspect the Master Scale 2.3.1.1 Inspect the scale deck for wear and check... Open at page → 6 Page 6 SOP 27 – 2019 Page 6 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 2.3.3.3 Visually inspect the railroad test car. Check for damage, obvious loose parts; or, have a quali... Open at page → 7 Page 7 SOP 27 – 2019 Page 7 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 2.3.3.6 Check security seals, if present, for tampering or unauthorized entry to sealed compartments. 2... Open at page → 8 Page 8 SOP 27 – 2019 Page 8 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Remove the test car and recheck the reference indication and record observations, again, noting any dri... Open at page → 9 Page 9 SOP 27 – 2019 Page 9 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 5 Assignment of Uncertainty The limits of expanded uncertainty, U , include estimates of the standard u... Open at page → 10 Page 10 SOP 27 – 2019 Page 10 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Table 3. Example Uncertainty Budget Table. Uncertainty Component Description Symbol Source Typical Dis... Open at page → 11 Page 11 SOP 27 – 2019 Page 11 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 uncertainties. No correction for the effect of air buoyancy is to be assumed unless stated on the cali... Open at page → 12 Page 12 SOP 27 – 2019 Page 12 of 12 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Appendix A – Types of Railroad Test Cars Monitor car. Essentially a modified freight car with approved... Open at page →