Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:3:p7
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 3 (pt 7/18)
Character Range: 382985–385902

it is not necessary to modify the shell of the tank;
               (e) The manufacturer may propose a test method in order to take into  account the loss of hydrocarbons by evaporation coming only from the               fuel system of the vehicle.
              5.1.2. The vehicle is taken into the test area where the ambient temperature is between 293 and 303 K (20 and 30 °C).
              5.1.3. The ageing of the canister(s) has to be verified. This may be done by demonstrating that it has accumulated a minimum of 3,000 km. If this demonstration is not given, the following procedure is used. In the case of a multiple canister system each canister shall undergo the procedure separately.
              5.1.3.1. The canister is removed from the vehicle. Special care shall be taken during this step to avoid damage to components and the integrity of the fuel system.
5.1.3.2. The weight of the canister shall be checked.
              5.1.3.3. The canister is connected to a fuel tank, possibly an external one, filled with reference fuel, to 40 per cent volume of the fuel tank(s).
              5.1.3.4. The fuel temperature in the fuel tank shall be between 183 K and 287 K (10 and 14 °C).
              5.1.3.5. The (external) fuel tank is heated from 288 K to 318 K (15 to 45 °C) (1 °C increase every 9 minutes).
              5.1.3.6. If the canister reaches breakthrough before the temperature reaches 318 K (45 °C), the heat source shall be turned off. Then the canister is weighed. If the canister did not reach breakthrough during the heating to 318 K (45 °C), the procedure from paragraph 5.1.3.3. above shall be repeated until breakthrough occurs.
              5.1.3.7. Breakthrough may be checked as described in paragraphs 5.1.5. and 5.1.6. of this annex, or with the use of another sampling and analytical arrangement capable of detecting the emission of hydrocarbons from the canister at breakthrough.
              5.1.3.8. The canister shall be purged with 25 5 litres per minute with the emission laboratory air until 300 bed volume exchanges are reached.
5.1.3.9. The weight of the canister shall be checked.
              5.1.3.10. The steps of the procedure in paragraphs 5.1.3.4. to 5.1.3.9. shall be repeated nine times. The test may be terminated prior to that, after not less than three ageing cycles, if the weight of the canister after the last cycles has stabilised.
              5.1.3.11. The evaporative emission canister is reconnected and the vehicle restored to its normal operating condition.
              5.1.4. One of the methods specified in paragraphs 5.1.5. and 5.1.6. shall be used to precondition the evaporative canister. For vehicles with multiple canisters, each canister shall be preconditioned separately.
              5.1.4.1. Canister emissions are measured to determine breakthrough.
               Breakthrough is here defined as the point at which the