Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p49
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 137008–140118

at (or below) the levels specified in paragraph 7.1.4.3. of this Regulation; otherwise, the test is failed and the system is not qualified for vehicle service.
         4. Compliance test for the vehicle exhaust system
         4.1. The power system of the test vehicle (e.g. fuel cell stack or engine) is warmed up to its normal operating temperature.
         4.2. The measuring device is warmed up before use to its normal operating temperature.
         4.3. The measuring section of the measuring device is placed on the centre line of the exhaust gas flow within 100 mm from the exhaust point of discharge external to the vehicle.
         4.4. The exhaust hydrogen concentration is continuously measured during the following steps:
              (a) The power system is shut-down;
              (b) Upon completion of the shut-down process, the power system is immediately started;
              (c) After a lapse of one minute, the power system is turned off and measurement continues until the power system shut-down procedure is completed.
         4.5. The measurement device shall have a measurement response time of less than 300 milliseconds.
         5. Compliance test for fuel line leakage
         5.1. The power system of the test vehicle (e.g. fuel cell stack or engine) is warmed up and operating at its normal operating temperature with the operating pressure applied to fuel lines.
         5.2. Hydrogen leakage is evaluated at accessible sections of the fuel lines from the high-pressure section to the fuel cell stack (or the engine), using a gas leak detector or a leak detecting liquid, such as soap solution.
         5.3. Hydrogen leak detection is performed primarily at joints
         5.4. When a gas leak detector is used, detection is performed by operating the leak detector for at least 10 seconds at locations as close to fuel lines as possible.
         5.5. When a leak detecting liquid is used, hydrogen gas leak detection is performed immediately after applying the liquid. In addition, visual checks are performed a few minutes after the application of liquid to check for bubbles caused by trace leaks.
         6. Installation verification
         The system is visually inspected for compliance.

Annex 6

Provisions for a label for hydrogen vehicles of categories M2/N2 and M3/N3.

         (Paragraph 7.1.7. of this Regulation)
         The label shall be weather resistant.
         The centre zone indicates the first energy source
         The upper zone indicates the second energy source
         The left zone indicates the gas behaviour due to density
         The right zone indicates the state of aggregation of stored gaseous fuel
         Layout and symbols shall be in accordance with ISO 17840-4:2018
         The colour and dimensions of the label shall fulfil the following requirements:
Colours:
          Background:           Light blue, RGB code 0, 176, 240
          Border:               White reflecting
          Letters and symbols:  White reflecting

Dimensions:
             Sticker width:   ≥ 110 mm
             Sticker height:  ≥