Provisions On Metrological Requirements For Exhaust Gas Analyser

Original Language Title: Noteikumi par metroloģiskajām prasībām izplūdes gāzu analizatoriem

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Cabinet of Ministers Regulations No. 672, Riga, 22 august 2006 (pr. No 43 11) provisions on metrological requirements exhaust gas analysers are Issued in accordance with the law "on a uniformity of measurements" the second subparagraph of article 6 and the law "on conformity assessment" 7. the first paragraph of article 1. determine the metrological requirements and the conformity assessment procedures of exhaust gas analysers, intended for use in control and erode the professional servicing before the exhaust gas analyser is placed in the internal market, as well as placed in service. 2. the meaning of these provisions: 2.1. exhaust gas analyser-measuring tool designed for autotranspor vehicles with positive-ignition engine exhaust gas volume fractions of specified components appropriate for determining analyte in the sample moisture level;
2.2. the gas components are carbon monoxide (CO), carbon dioxide (CO2), oxygen (O2) and hydrocarbons (HC);
2.3. composition of hydrocarbons expressed as concentration of n-hexane (C6H14), which is measured by infrared absorption method;
2.4. gas volume fractions of CO, CO2 and O2 are expressed as a volume/volume percentage (% vol), but the volume in parts of HC (ppm Vol);
2.5. the gas analyser from the volume fractions of the exhaust components calculated lambda (λ);
2.6. the value of lambda is a dimensionless number that expresses the combustion engine fuel efficiency, and it is defined as the ratio of air to fuel of the composition of the exhaust gases. 3. The essential requirements for exhaust gas analyser specified in the Act, regulations of metrological requirements measuring instruments. The specific requirements for the exhaust gas analysers defined in the annex to these provisions. 4. An exhaust gas analyser shall comply with the rules and regulations of the Act on the metrological requirements measuring instruments. 5. The manufacturer may choose conformity assessment procedures of the following modules: B + F or B + D or H1. Module specific regulatory provisions on metrological requirements measuring instruments. 6. An exhaust gas analyser for which type-approval was issued until the date of entry into force of the rules, allowed to put on the market and the exhaust gas analysers, which made first-time verification, allowed to pass until they use the type approval expiration date, but if it is not set, the-by 2016 of 30 October. 7. The entry into force of the provisions by 30 October 2006. Informative reference to European Union Directive provisions included in the law arising from the European Parliament and of the Council of 31 March 2004, Directive 2004/22/EC on measuring instruments. Prime Minister a. Halloween economic Minister a. Štokenberg annex a Cabinet of 22 august 2006 Regulation No. 672 of specific metrological requirements 1. gas analysers are set two classes: 0 and 1. Minimum mērdiapazon in these classes are defined in table 1 of this annex. table 1 parameter class 0 or 1 CO fraction From 0 to 5 v. % CO2 fraction from 0 to 16 v. % HC fraction from 0 to 2000 v. ppm O2 fraction from 0 to 21%. From 0.8 to 1.2%, 2. the manufacturer shall define the following operating conditions: 2.1.-values that characterize the climatic and mechanical environment: 2.1.1. minimum temperature range climatic environment is 35 ° c. 2.1.2. the mechanical environment class M1; 2.2. determining the values that characterize the electricity: 2.2.1. voltage and frequency range for the AC power source; 2.2.2. limit values for DC voltage source; 2.3. ambient pressure minimum and maximum values for both classes: pmin is 1060 HPA. 3. For each of the fractions measured a maximum permissible error (there can-CPC) the operating conditions laid down in accordance with the requirements laid down in the Act, regulations of metrological requirements measuring instruments meet the larger of the two given in table 2. Absolute values are expressed as a volume/volume percentage (% vol)-or in parts (ppm Vol). The percentage is of value, expressed as a percentage of the ratio of the absolute error to the true value. table 2 maximum permissible error parameter class 0 class 1 ± 0.03 CO fraction v. % ± 5% ± 0.06%. % ± 5% ± 0.5 vol CO2 fraction % ± 5% ± 0.5 v. % ± 5% ± 10 v HC fraction. ppm ± 5% ± 12 v. ppm ± 5% ± 0.1% v/v O2 fraction. % ± 5% ± 0.1 v. % ± 5% 4. CPC lambda calculation is 0.3%. After the usual methods adopted the fair value calculation and determine the measures to be adopted to reduce the autotranspor of air pollution. For this purpose, the calculations use the measuring instrument readings. 5. Each of the volume fractions measured interference permissible changes in critical value is equal to the MPE for the parameter concerned. 6. The permissible electromagnetic disturbance is at a level to change the result of measurement is not greater than the critical change value laid down in paragraph 5 of this annex, or the measurement result is such that you can not be considered a valid result. 7. the resolution of the Measurement is equal to or higher than the value of the card, which is specified in table 3 of this annex. table 3 O2 CO2 CO HC class 0 or 1 0.01 v. % 0.1 v. % (*) 1 v. (*) 0.01 ppm v. % mērlielum value