Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 6498

e) the applicant shall provide evidence to the certificating authority, by means of detailed traverses, that the proposed probe design and position does provide a representative sample for each prescribed power setting. 5.1.2 Sampling lines The sample shall be transferred from the probe to the analysers via a line of 4.0 to 8.5 mm inside diameter, taking 2007/70/II. szám Appendix 3 Annex 16 — Environmental Protection 11/11/93 the shortest route practicable and using a flow rate such that the transport time is less than 10 seconds. The line shall be maintained at a temperature of 160°C ±15°C (with a stability of ±10°C), except for a) the distance required to cool the gas from the engine exhaust temperature down to the line control temperature, and b) the branch which supplies samples to the CO, CO2, and NOx analysers. This branch line shall be maintained at a temperature of 65°C ± 15°C (with a stability of ±10°C). When sampling to measure HC, CO, CO2 and NOx components the line shall be constructed in stainless steel or carbon-loaded grounded PTFE. 5.2 HC analyser The measurement of total hydrocarbon sample content shall be made by an analyser using the heated flame ionization detector (FID), between the electrodes of which passes an ionization current proportional to the mass rate of hydrocarbon entering a hydrogen flame. The analyser shall be deemed to include components arranged to control temperature and flow rates of sample, sample bypass, fuel and diluent gases, and to enable effective span and zero calibration checks. Note.— An over-all specification is given in Attachment A to this appendix. 5.3 CO and CO2 analysers Non-dispersive infra-red analysers shall be used for the measurements of these components, and shall be of the design which utilizes differential energy absorption in parallel reference and sample gas cells, the cell or group of cells for each of these gas constituents being sensitized appropriately. This analysis sub-system shall include all necessary functions for the control and handling of sample, zero and span gas flows. Temperature control shall be that appropriate to whichever basis of measurement, wet or dry, is chosen. Note.— An over-all specification is given in Attachment B to this appendix. 5.4 NOx analyser The measurement of NO concentration shall be by the chemiluminescent method in which the measure of the radiation intensity emitted during the reaction of the NO in the sample with added O3 is the measure of the NO concentration. The NO2 component shall be converted to NO in a converter of the requisite efficiency prior to measurement. The resultant NOx measurement system shall include all necessary flow, temperature and other controls and provide for routine zero and span calibration as well as for converter efficiency checks. Note.— An over-all specification is given in Attachment C to this appendix. 6. GENERAL TEST PROCEDURES 6.1 Engine operation 6.1.1 The engine shall be operated on a static test facility which is suitable and properly equipped for high accuracy performance testing. 6.1.2 The emissions tests shall be made at the power settings prescribed by the certificating authority. The engine shall be stabilized at each setting. 6.2 Major instrument calibration Note.— The general objective of this calibration is to confirm stability and linearity. 6.2.1 The applicant shall satisfy the certificating authority that the calibration of the analytical system is valid at the time of the test. 6.2.2 For the hydrocarbon analyser this calibration shall include checks that the detector oxygen and differential hydrocarbon responses are within the limits specified, as laid down in Attachment A to this appendix. The efficiency of the NO2/NO converter shall also be checked and verified to meet the requirements in Attachment C to this appendix. 6.2.3 The procedure for checking the performance of each analyser shall be as follows (using the calibration and test gases as specified in Attachment D to this appendix):

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