Double Substitution

1 Page 1 SOP 4 – 2019 Page 1 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 SOP 4 Recommended Standard Operating Procedure for Weighing by Double Substitution 1 Introduction P... Open at page → 2 Page 2 SOP 4 – 2019 Page 2 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 experiments must be conducted to ascertain initial performance quality and adequacy. The operator m... Open at page → 3 Page 3 SOP 4 – 2019 Page 3 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 indications without changing built-in weights, if present (this includes changing dials or the weig... Open at page → 4 Page 4 SOP 4 – 2019 Page 4 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 Calibrated barometer with sufficiently small resolution, stability, and uncertainty (See SOP 2, e.g... Open at page → 5 Page 5 SOP 4 – 2019 Page 5 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 2.5.1.2 If cleaning weights, it is important to clean weights before any measurements are made, unl... Open at page → 6 Page 6 SOP 4 – 2019 Page 6 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 Table 4. Minimum equilibration times. 5 ΔT a Nominal Mass OIML Class F1 (time in h) OIML Class F2 t... Open at page → 7 Page 7 SOP 4 – 2019 Page 7 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 2) (e.g., t he optical/digital scale is calibrated each time the procedure is performed through the... Open at page → 8 Page 8 SOP 4 – 2019 Page 8 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 All observations should be recorded on suitable data sheets such as those in the appendix or may be... Open at page → 9 Page 9 SOP 4 – 2019 Page 9 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 Measurement Procedure, Optional Sequence B (XSSX) Table 6. Optional Sequence B. Measurement No. Wei... Open at page → 10 Page 10 SOP 4 – 2019 Page 10 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 3.2.2.1 Optional Sequence A (SXXS). ( )( ) 21 34 32 1 111 2 1 S Sc s Sc a sw swaaa Stt St t Sc a S... Open at page → 11 Page 11 SOP 4 – 2019 Page 11 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 of error cannot be found, measurement must be stopped until suitable corrective action is taken. C... Open at page → 12 Page 12 SOP 4 – 2019 Page 12 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 calculated t-value less than two is within the warning limits of the process. A calculated t-value... Open at page → 13 Page 13 SOP 4 – 2019 Page 13 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 The expanded uncertainty for the standard, U , is obtained from the calibration certificate. The c... Open at page → 14 Page 14 SOP 4 – 2019 Page 14 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 5.2.1.2 When the laboratory has the confidence associated with a well characterized measurement pr... Open at page → 15 Page 15 SOP 4 – 2019 Page 15 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 provided in SOP 29 and may be included if corrective action is not taken. See SOP 2 and 29 for add... Open at page → 16 Page 16 SOP 4 – 2019 Page 16 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 6 Certificate Report results as described in SOP No. 1, Preparation of Calibration Certificates. R... Open at page → 17 Page 17 SOP 4 – 2019 Page 17 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 Appendix A Double Substitution Data Sheet (Optional Sequence A, SXXS) Laboratory data and conditio... Open at page → 18 Page 18 SOP 4 – 2019 Page 18 of 18 This publication is available free of charge from: https://doi.org/10.6028/NIST.IR.6969 - 2019 Appendix B Double Substitution Data Sheet (Optional Sequence B, XSSX) Laboratory data and conditio... Open at page →