Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 6614

d) n-hexane in zero air. 20/3/97 No. 3 2007/70/II. szám Appendix 5 Annex 16 — Environmental Protection 11/11/93 If Ra, Rb, Rc and Rd are, respectively, the normalized responses (with respect to propane), then (Ra – Rb), (Ra – Rc) and (Ra – Rd) shall each be less than 5 per cent of Ra. 3. OPTIMIZATION OF DETECTOR RESPONSE AND ALIGNMENT 3.1 The manufacturer’s instructions for initial setting up procedures and ancillary services and supplies required shall be implemented, and the instrument allowed to stabilize. All setting adjustments shall involve iterative zero checking, and correction as necessary. Using as sample a mixture of approximately 500 ppmC of propane in air, the response characteristics for variations first in fuel flow and then, near an optimum fuel flow, for variations in dilution air flow to select its optimum shall be determined. The oxygen and differential hydrocarbon responses shall then be determined as indicated above. 3.2 The linearity of each analyser range shall be checked by applying propane in air samples at concentrations of approximately 30, 60 and 90 per cent of full scale. The maximum response deviation of any of these points from a least squares straight line (fitted to the points and zero) shall not exceed ±2 per cent of full scale value. If it does, a calibration curve shall be prepared for operational use. ATTACHMENT B TO APPENDIX 5. SPECIFICATION FOR CO AND CO2 ANALYSERS Note 1.– Paragraph 5.3 of Appendix 5 summarizes the characteristics of the analysis sub-system to be employed for the individual measurements of CO and CO2 concentrations in the exhaust gas sample. The instruments are based on the principle of non-dispersive absorption of infra-red radiation in parallel reference and sample gas cells. The required ranges of sensitivity are obtained by use of stacked sample cells or changes in electronic circuitry or both. Interferences from gases with overlapping absorption bands may be minimized by gas absorption filters and/or optical filters, preferably the latter. Note 2.— See Attachment D for information on calibration and test gases. Precautions: The performance specifications indicated are generally for analyser full scale. Errors at part scale may be a significantly greater percentage of reading. The relevance and importance of such increases shall be considered when preparing to make measurements. If better performance is necessary, then appropriate precautions shall be taken. The principal performance specification shall be as follows: CO Analyser

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