Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 6482

g) shall be repeated as necessary. 3. CALCULATION OF SMOKE NUMBER FROM MEASURED DATA The stained filter specimens obtained as outlined in 2.5.3 shall be analysed using a reflectometer as specified in 2.3. The backing material used shall be black with an absolute reflectance of less than 3 per cent. The absolute reflectance reading RS of each stained filter shall be used to calculate the reduction in reflectance by SN′ = 100(1 – RS /RW ) where RW is the absolute reflectance of clean filter material. The masses of the various samples shall be calculated by W = 0.348 PV/T × 10–2(kg) where P and T are, respectively, the sample pressure in pascals and the temperature in kelvin, measured immediately upstream of the volume meter. V is the measured sample volume in cubic metres. For each engine condition in the case that the sample sizes range above and below the reference value, the various values of SN′ and W shall be plotted as SN′ versus log W/A, where A is the filter stain area (m2). Using a least squares straight line fit, the value of SN′ for W/A = 16.2 kg/m2 shall be estimated and reported as the Smoke Number (SN) for that engine mode. Where sampling at the reference size value only is employed, the reported SN shall be the arithmetic average of the various individual values of SN′. 4. REPORTING OF DATA TO THE CERTIFICATING AUTHORITY The measured data shall be reported to the certificating authority. In addition the following data shall be reported for each test:

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