Division 5.2.4 F1

At the end of the remaining 17th week, the tank is drained and refilled with fresh reference fuel at a temperature of 18 °C ± 8 °C at 40 % +/– 2 % of the nominal tank capacity.

Within 6 to 36 hours, the last 6 hours at 20 °C ± 2 °C, the rig with the fuel system is placed in a VT-SHED a diurnal procedure is performed over a period of 24 hours, according to the procedure described according to paragraph 5.7 of Annex 7 of UN/ECE Regulation No 83. The fuel system is vented to the outside of the VT-SHED to eliminate the possibility of the tank venting emissions being counted as permeation. The HC emissions are measured and the value is recorded as HC _20W .