Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:3:p4
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 3 (pt 4/18)
Character Range: 308081–310875

control families - details clarified.
     2.  Exhaust emissions may be measured during Type I test drive but these are not used for legislative purposes. Exhaust emission legislative test remains separate.

          4.3.  Analytical systems

          4.3.1.  Hydrocarbon analyser

          4.3.1.1.  The atmosphere within the chamber is monitored using a hydrocarbon detector of the flame ionisation detector (FID) type. Sample gas shall be drawn from the mid-point of one side wall or roof of the chamber and any bypass flow shall be returned to the enclosure, preferably to a point immediately downstream of the mixing fan.

          4.3.1.2.  The hydrocarbon analyser shall have a response time to 90 per cent of final reading of less than 1.5 seconds. Its stability shall be better than 2 per cent of full scale at zero and at 80  20 per cent of full scale over a 15-minute period for all operational ranges.

          4.3.1.3. The repeatability of the analyser expressed as one standard deviation shall be better than  1 per cent of full scale deflection at zero and at 80  20 per cent of full scale on all ranges used.

          4.3.1.4. The operational ranges of the analyser shall be chosen to give best resolution over the measurement, calibration and leak checking procedures.

          4.3.2.  Hydrocarbon analyser data recording system

          4.3.2.1. The hydrocarbon analyser shall be fitted with a device to record electrical signal output either by strip chart recorder or other data processing system at a frequency of at least once per minute. The recording system shall have operating characteristics at least equivalent to the signal being recorded and shall provide a permanent record of results. The record shall show a positive indication of the beginning and end of the hot soak or diurnal emission test (including beginning and end of sampling periods along with the time elapsed between start and completion of each test).

          4.4.  Fuel tank heating (only applicable for gasoline canister load option)

          4.4.1.  The fuel in the vehicle tank(s) shall be heated by a controllable source of heat; for example a heating pad of 2,000 W capacity is suitable. The heating system shall apply heat evenly to the tank walls beneath the level of the fuel so as not to cause local overheating of the fuel. Heat shall not be applied to the vapour in the tank above the fuel.

          4.4.2. The tank heating device shall make it possible to heat the fuel in the tank evenly by 14 K from 289 K (16 C) within 60 minutes, with the temperature sensor position as in paragraph 5.1.1. below. The heating system shall be capable of controlling the fuel temperature to  1.5 K of the required temperature during the tank heating process.

          4.5.