Traduction de «Compteur de particules dans l'air » (Français → Anglais) :

245. Unless otherwise authorized by specifications established by the Minister, all meters except slow-flow meters and slow-flow dispensers shall have an automatic air-vapour eliminator and a meter for liquefied gases shall also have a combination differential-pressure and back-pressure valve.

245. Unless otherwise authorized by specifications established by the Minister, all meters except slow-flow meters and slow-flow dispensers shall have an automatic air-vapour eliminator and a meter for liquefied gases shall also have a combination differential-pressure and back-pressure valve.

Some tests indicate that as sand is ground down it puts particulates into the air, thereby adding to the particulate emissions in our cities.

(9) Whereas reductions in emission limits applicable from the year 2000 corresponding to abatements of 30 % in emissions of carbon monoxide, total hydrocarbons, NOx and particulate matter have been identified by the Auto-oil programme as key measures to achieving satisfactory medium-term air quality; whereas a reduction of 30 % in exhaust smoke opacity over that measured on current engine types and complementing Council Directive 72/306/EEC(11) will contribute to the reduction of particulate matter; whereas additional reductions in emission limits applicable from 2005 of 30 % carbon monoxide, total hydrocarbons and NOx and 80 % in particulates will greatly contri ...[+++]bute to medium-term air quality benefits; whereas these reductions will take into account the effect on emissions of new test cycles that better represent the driving patterns experienced by in-service vehicles; whereas the additional NOx limit applicable from 2008 will result in a further 43 % reduction in the emission limit for this pollutant; whereas, no later than the end of 2002, the Commission is to consider the available technology with a view to confirming the mandatory NOx standard for 2008 in a report to the European Parliament and the Council, accompanied, if necessary, by appropriate proposals;

Gas meters or flow instrumentation used to determine flow through the particulate filters and to calculate the dilution ratio are calibrated with a standard air flow measurement device upstream of the instrument.

Measuring systems shall be installed in such a way that they do not normally produce, upstream of the meter, entry of air or release of gas into the liquid.