Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:13:p27
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 13 (pt 27/56)
Character Range: 371724–374697

multiplied with or be added to, respectively, the specific emissions result e as determined in equations 69 and 70.
9. Equipment specification and verification
 This annex does not contain details of flow, pressure, and temperature measuring equipment or systems. Instead, only the linearity requirements of such equipment or systems necessary for conducting an emissions test are given in paragraph 9.2.
9.1. Dynamometer specification
 An engine dynamometer with adequate characteristics to perform the appropriate test cycle described in paragraphs 7.2.1. and 7.2.2. shall be used.
 The instrumentation for torque and speed measurement shall allow the measurement accuracy of the shaft power as needed to comply with the cycle validation criteria. Additional calculations may be necessary. The accuracy of the measuring equipment shall be such that the linearity requirements given in paragraph 9.2., Table 7 are not exceeded.
9.2. Linearity requirements
 The calibration of all measuring instruments and systems shall be traceable to national (international) standards. The measuring instruments and systems shall comply with the linearity requirements given in Table 7. The linearity verification according to paragraph 9.2.1. shall be performed for the gas analyzers at least every three months or whenever a system repair or change is made that could influence calibration. For the other instruments and systems, the linearity verification shall be done as required by internal audit procedures, by the instrument manufacturer or in accordance with ISO 9000 requirements.
       Table 7
       Linearity requirements of instruments and measurement systems
Measurement system        min  (a1 - 1)+ a0  Slope        Standard error  Coefficient of determination
                                                 a1           SEE             r2
Engine speed              ≤  0.05 % max          0.98 - 1.02  ≤  2 % max      ≥  0.990
Engine torque             ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Fuel flow                 ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Airflow                   ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Exhaust gas flow          ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Diluent flow              ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Diluted exhaust gas flow  ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Sample flow               ≤  1 % max             0.98 - 1.02  ≤  2 % max      ≥  0.990
Gas analyzers             ≤  0.5 % max           0.99 - 1.01  ≤  1 % max      ≥  0.998
Gas dividers              ≤  0.5 % max           0.98 - 1.02  ≤  2 % max      ≥  0.990
Temperatures              ≤  1 % max             0.99 - 1.01  ≤  1 % max      ≥  0.998
Pressures                 ≤  1 % max             0.99 - 1.01  ≤  1 % max      ≥  0.998
PM balance                ≤  1 % max             0.99 - 1.01  ≤  1 % max      ≥