Document ID: chunk:federal_register_of_legislation:F2024L00447:reg:0:p21
Version: federal_register_of_legislation:F2024L00447
Segment Type: reg
Provision Reference: reg 0 (pt 21/57)
Character Range: 149942–153244

Upon request, the manufacturer of the analyser shall submit in writing supplemental information, demonstrating that the measurement performance of the alternative analyser is consistently and reliably in line with the measurement performance of standard analysers. Supplemental information shall contain:

                  (a) A description of the theoretical basis and the technical components of the alternative analyser;

                  (b) A demonstration of equivalency with the respective standard analyser specified in paragraph 4.1.1. over the expected range of pollutant concentrations and ambient conditions of the type-approval test defined in UN Regulation No. 154 on WLTP as well as a validation test as described in paragraph 3. of Annex 6 for a vehicle equipped with a spark-ignition and compression-ignition engine; the manufacturer of the analyser shall demonstrate the significance of equivalency within the permissible tolerances given in paragraph 3.3. of Annex 6.

                  (c) A demonstration of equivalency with the respective standard analyser specified in paragraph 4.1.1. with respect to the influence of atmospheric pressure on the measurement performance of the analyser; the demonstration test shall determine the response to span gas having a concentration within the analyser range to check the influence of atmospheric pressure under moderate and extended altitude conditions defined in paragraph 5.2. Such a test can be performed in an altitude environmental test chamber.

                  (d) A demonstration of equivalency with the respective standard analyser specified in paragraph 4.1.1. over at least three on-road tests that fulfil the requirements of this Annex.

                  (e) A demonstration that the influence of vibrations, accelerations and ambient temperature on the analyser reading does not exceed the noise requirements for analysers set out in paragraph 4.2.4.

              Approval authorities may request additional information to substantiate equivalency or refuse approval if measurements demonstrate that an alternative analyser is not equivalent to a standard analyser.

              4.2. Analyser specifications

              4.2.1. General

              In addition to the linearity requirements defined for each analyser in paragraph 3., the compliance of analyser types with the specifications laid down in paragraphs 4.2.2. to 4.2.8. shall be demonstrated by the analyser manufacturer. Analysers shall have a measuring range and response time appropriate to measure with adequate accuracy the concentrations of the exhaust gas components at the applicable emissions standard under transient and steady state conditions. The sensitivity of the analysers to shocks, vibration, aging, variability in temperature and air pressure as well as electromagnetic interferences and other impacts related to vehicle and analyser operation shall be limited as far as possible.

              4.2.2. Accuracy

              The accuracy, defined as the deviation of the analyser reading from the reference value, shall not exceed 2 per cent of reading or 0.3 per cent of full scale, whichever is larger.

              4.2.3. Precision

              The precision, defined as 2.5 times the standard deviation of 10 repetitive