# Commission Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance), Division 4.1.10: Measurement uncertainty

Extent: E+W+S+N.I.

The part of the calculated measurement uncertainty UT,pum/tur exceeding 1 % of the measured torque Tc,pum/tur shall be used to correct the characteristic value of the TC as defined below.
ΔUT,pum/tur = MAX (0, (UT,pum/tur – 0,01 * Tc,pum/tur))
The uncertainty UT,pum/tur of the torque measurement shall be calculated based on the following parameter:
(i)Calibration error (incl. sensitivity tolerance, linearity, hysteresis and repeatability)
The uncertainty UT,pum/tur of the torque measurement is based on the uncertainties of the sensors at 95 % confidence level.
UT,pum/tur = 2 * ucal
ucal=1×Wcalkcal×Tn
where:
Tc,pum/tur Current / measured torque value at input/output torque sensor (uncorrected) [Nm]
Tpum Input (pump) torque (after uncertainty correction) [Nm]
UT,pum/tur Uncertainty of input / output torque measurement at 95 % confidence level separately for input and output torque sensor[Nm]
Tn Nominal torque value of torque sensor [Nm]
ucal Uncertainty by torque sensor calibration [Nm]
Wcal Relative calibration uncertainty (related to nominal torque) [%]
kcal Calibration advancement factor (if declared by sensor manufacturer, otherwise = 1)

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Source: https://www.legislation.gov.uk/eur/2017/2400/annex/VI/division/4/division/4.1/division/4.1.10 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-2400/annex-VI/division-4/division-4.1/division-4.1.10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.