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vzorčenje
sampling
Last Update: 2017-04-06
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pri vrsti sistemov za celotno vzorčenje pri redčenju z delnim pretokom se masni pretok, odvzet za vzorčenje števila delcev, popravi tudi v izračunu mase delcev, kot je navedeno v odstavku 10.3.3.
in the case of total sampling type partial flow dilution systems, the mass flow extracted for particle number sampling shall also be corrected for in the particulate mass calculation as outlined in paragraph 10.3.3.
pri sistemih za celotno vzorčenje pri redčenju z delnim tokom (kot je opisano v odstavku a.3.2.1 priloge 4b se točka vzorčenja delcev namesti v cev za prenos delcev pred držalom filtra za delce, napravo za merjenje pretoka in vsemi točkami razcepa/obvoda vzorca.
in the case of partial flow dilution systems of the total sampling type (as described in annex 4b, paragraph a.3.2.1) the particle sampling point shall be located in the particulate transfer tube, upstream of the particulate filter holder, flow measurement device and any sample/bypass bifurcation point.
pri sistemih za celotno vzorčenje pri redčenju z delnim tokom (kot je opisano v odstavku a.3.2.1 priloge 4b se točka vzorčenja delcev ali sonda za vzorčenje namesti v cev za prenos delcev pred držalom za filter delcev, napravo za merjenje pretoka in vsemi točkami razcepa/obvoda vzorca.
in the case of partial flow dilution systems of the total sampling type (as described in annex 4b, paragraph a.3.2.1) the particle sampling point or sampling probe shall be located in the particulate transfer tube, upstream of the particulate filter holder, flow measurement device and any sample/bypass bifurcation point.
mora biti pri sistemih za delno vzorčenje dovolj dolg, da se izpušni plini in redčilo v vrtinčastem toku popolnoma premešajo (reynoldsovo število re je večje od 4000, pri čemer temelji na notranjem premeru tunela za redčenje); pri sistemih za celotno vzorčenje ni treba, da se izpušni plini in redčilo popolnoma premešajo;
shall be of a sufficient length to cause complete mixing of the exhaust and diluent under turbulent flow conditions (reynolds number, re, greater than 4000, where re is based on the inside diameter of the dilution tunnel) for a fractional sampling system, i.e. complete mixing is not required for a total sampling system,