Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:3:p5
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 3 (pt 5/18)
Character Range: 310621–313456

(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. Temperature recording

          4.5.1. The temperature in the chamber is recorded at two points by temperature sensors which are connected so as to show a mean value. The measuring points are extended approximately 0.1 m into the enclosure from the vertical centre line of each side wall at a height of 0.9  0.2 m.

          4.5.2. The temperatures of the fuel tank(s) are recorded by means of the sensor positioned in the fuel tank as in paragraph 5.1.1. below in the case of use of the gasoline canister load option (paragraph 5.1.5. below).

          4.5.3. Temperatures shall, throughout the evaporative emission measurements, be recorded or entered into a data processing system at a frequency of at least once per minute.

          4.5.4. The accuracy of the temperature recording system shall be within  1.0 K and the temperature shall be capable of being resolved to  0.4 K.

          4.5.5. The recording or data processing system shall be capable of resolving time to  15 seconds.

          4.6.  Pressure recording

          4.6.1. The difference Δp between barometric pressure within the test area and the enclosure internal pressure shall, throughout the evaporative emission measurements, be recorded or entered into a data processing system at a frequency of at least once per minute.

          4.6.2. The accuracy of the pressure recording system shall be within  2 kPa and the pressure shall be capable of being resolved to  0.2 kPa.

          4.6.3. The recording or data processing system shall be capable of resolving time to
           15 seconds.

          4.7.  Fans

          4.7.1.  By the use of one or more fans or blowers with the SHED door(s) open it shall be possible to reduce the hydrocarbons concentration in the chamber to the ambient hydrocarbon level.

          4.7.2.  The chamber shall have one or more fans or blowers of like capacity 0.1 to 0.5 m3/min. with which to thoroughly mix the atmosphere in the enclosure. It shall be possible to attain an even temperature and hydrocarbon concentration in the chamber during measurements. The vehicle in the enclosure shall not be subjected to a direct stream of air from the fans or blowers.

          4.8.  Gases

          4.8.1.  The following pure gases shall be available for calibration and operation:

         Purified synthetic air:  (purity: < 1 ppm C1 equivalent,   1 ppm CO,   400 ppm CO2,   0,1 ppm NO); oxygen content between 18 and 21  per cent by volume,

         Hydrocarbon analyser fuel gas:  (40  2 per cent hydrogen, and balance helium with less than