Division 3.3.1 Calculation

PM shall be calculated using the following two equations:

PM = \frac{(V_{mix} + V_{ep}) \times P_{e}}{V_{ep} \times d}

where exhaust gases are vented outside tunnel;

and:

PM = \frac{V_{mix} \times P_{e}}{V_{ep} \times d}

where exhaust gases are returned to the tunnel;

where:

V_mix

is the volume of diluted exhaust gases (see paragraph 2. of this Sub-Annex), under standard conditions;

V_ep

is the volume of diluted exhaust gas flowing through the particulate sampling filter under standard conditions;

P_e

is the mass of particulate matter collected by one or more sample filters, mg;

is the distance driven corresponding to the test cycle, km.