Division 2.9.1 F1

The following steps shall be taken prior to each test:

1. 2.9.1.1.

   The purged, evacuated sample bags shall be connected to the dilute exhaust and dilution air sample collection systems.

2. 2.9.1.2.

   Measuring instruments shall be started in accordance with the instrument manufacturer's instructions.

3. 2.9.1.3.

   The CVS heat exchanger (if installed) shall be pre-heated or pre-cooled to within its operating test temperature tolerance as specified in paragraph 3.3.5.1. of Sub-Annex 5.

4. 2.9.1.4.

   Components such as sample lines, filters, chillers and pumps shall be heated or cooled as required until stabilised operating temperatures are reached.

5. 2.9.1.5.

   CVS flow rates shall be set in accordance with paragraph 3.3.4. of Sub-Annex 5, and sample flow rates shall be set to the appropriate levels.

6. 2.9.1.6.

   Any electronic integrating device shall be zeroed and may be re-zeroed before the start of any cycle phase.

7. 2.9.1.7.

   For all continuous gas analysers, the appropriate ranges shall be selected. These may be switched during a test only if switching is performed by changing the calibration over which the digital resolution of the instrument is applied. The gains of an analyser's analogue operational amplifiers may not be switched during a test.

8. 2.9.1.8.

   All continuous gas analysers shall be zeroed and calibrated using gases fulfilling the requirements of paragraph 6. of Sub-Annex 5.