Cabinet of Ministers Regulations No. 665 Riga, august 22, 2006 (pr. No 43) provisions on metrological requirements gas consumption meters and volume conversion devices 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 gas consumption meters and volume conversion devices for gas in residential buildings, as well as commercial and light industrial use before gas consumption meters and volume conversion devices are placed in the internal market, as well as placed in service. 2. the meaning of these provisions: 2.1. gas consumption meter-measuring tool for combustible gases flowing through the meter quantity (volume or mass), saving memory and indication;
2.2. conversion device-to-device, equipped with gas consumption meter to measure quantity automatically convert amounts to examine;
2.3. minimum flow (Qmin)-less flow to which the gas meter provides indications of consumption which comply with the requirements regarding maximum permissible error (further-CPC);
2.4. maximum flow (Qmax)-the largest flow to which the gas consumption meter readings ensure that meet the requirements of the CPC;
2.5. the transitional flow (Qt)-flow, which is in the range between the maximum and minimum flow and flow range is divided into two areas-the upper area and lower area. Each zone is defined in the CPC;
2.6. overload flow (Qr)-the largest flow to which the gas consumption meter is temporarily operating satisfactorily without causing damage;
2.7.-examine certain conditions under which the measured quantity is converted. 3. The essential requirements gas consumption meters and volume conversion devices for certain regulatory provisions on metrological requirements measuring instruments. Particular requirements for gas consumption meters and volume conversion devices specified in the annex to these regulations. 4. consumption of gas meters and volume conversion devices meet the requirements of these rules and regulations in the Act on the metrological requirements measuring instruments. 5. Persons who provide services to the gas supply, ensure that the consumption of gas meters and volume conversion devices are installed according to the rules and regulations of the Act on the metrological requirements measuring features, requirements, and they provide the exact intended or foreseeable consumption measurements for which a person's responsibility. 6. The manufacturer may choose conformity assessment procedures of modules B + F or B + D or H1. Module specific regulatory provisions on metrological requirements measuring instruments. 7. consumption of gas meters and volume conversion device for which type-approval was issued until the date of entry into force of the rules, allowed to put on the market and the consumption of gas meters and volume conversion devices which perform a 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. 8. 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. 665 of specific metrological requirements i. gas consumption meters 1. The manufacturer shall determine the conditions for the operation of gas consumption meter pursuant to this annex, 2, 3, 4, 5 and 6. 2. gas flow range is chosen so as to match the table 1 of this annex the minimum conditions laid down. table 1 gas flow requirements range Qmin/Qmax/Qmin class Qt Qr/Qmax > 1.2 1.0 1.5 150 > 10 5 1.2 3.20 > > gas temperature minimum range is 40 ° c. 4. Gas consumption meter is designed for gas mērdiap area used and the delivery pressure. The manufacturer indicates the type or group of gas and the maximum working pressure. 5. The minimum ambient temperature range is 50 ° c. 6. There are certain energy source voltage: nominal value of Exchange current and thresholds for direct current. 7. The maximum permissible error (further-CPC) gas consumption meters, which show a volume at metering conditions or mass, determined in table 2 of this annex. table 2 CPC depending on meter accuracy class class 1.5 1.0 Qmin