Document ID: chunk:federal_register_of_legislation:F2023L01529:body:0:p41
Version: federal_register_of_legislation:F2023L01529
Segment Type: other
Provision Reference: 
Character Range: 114034–116917

the charger to a charging time of t1 + t2. This charging time will be limited to t1 + 5 h, even if a clear indication is given by a suitable instrumentation that the REESS is not yet fully charged.

       5.2.4.8. The hydrogen analyser shall be zeroed and spanned immediately before the end of the test.

       5.2.4.9. The end of the emission sampling period occurs t1 + t2 or t1 + 5 h after the beginning of the initial sampling, as specified in paragraph 5.2.4.6. above. The different times elapsed are recorded. The hydrogen concentration, temperature and barometric pressure are measured to give the final readings CH2f, Tf and Pf for the normal charge test, used for the calculation in paragraph 6. of this annex

       5.2.5. Hydrogen emission test with the charger failure

       5.2.5.1. The test procedure shall start within a maximum of seven days after having completed the test in paragraph 5.2.4. above, the procedure shall start with the discharge of the REESS of the vehicle in accordance with paragraph 5.2.2. above.

       5.2.5.2. The steps of the procedure in paragraph 5.2.3. above shall be repeated.

       5.2.5.3. Before the completion of the soak period, the measuring chamber shall be purged for several minutes until a stable hydrogen background is obtained. The enclosure mixing fan(s) shall also be turned on at this time.

       5.2.5.4. The hydrogen analyser shall be zeroed and spanned immediately prior to the test.

       5.2.5.5. At the end of the soak the REESS shall be moved into the measuring chamber.

       5.2.5.6. The REESS shall be charged according to the failure charge procedure as specified in paragraph 5.2.5.9. below.

       5.2.5.7. The chamber shall be closed and sealed gas-tight within two minutes from electrical interlock of the failure charge step.

       5.2.5.8. The start of a failure charge for hydrogen emission test period begins when the chamber is sealed. The hydrogen concentration, temperature and barometric pressure are measured to give the initial readings CH2i, Ti and Pi for the failure charge test.

        These figures are used in the hydrogen emission calculation (paragraph 6. of this annex).  The ambient enclosure temperature T shall not be less than 291 K and no more than 295 K during the charging failure period.

       5.2.5.9.  Procedure of charging failure

        The charging failure is carried out with a suitable charger and consists of the following steps:

           (a) Charging at constant power during t'1,

           (b) Charging at maximum current as recommended by the manufacturer during 30 minutes.  During this phase, the charger shall supply maximum current as recommended by the manufacturer.

       5.2.5.10. The hydrogen analyser shall be zeroed and spanned immediately before the end of the test.

       5.2.5.11. The end of test period occurs t'1 + 30 minutes