5.5.1 Direct measurement method
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5.5.1 Direct measurement method

 This method involves the direct measurement of the exhaust flow by flow nozzle or equivalent metering system and shall be in accordance with a recognized international standard.

Note Direct gaseous flow measurement is a difficult task. Precautions should be taken to avoid measurement errors which will impact emission value errors.

Parent topic: 5.5 Determination of exhaust gas flow
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