SCHEDULE 5(ANNEX V to Directive 97/68/EC)ANALYTICAL AND SAMPLING SYSTEM
Figure 12Partial flow dilution system with flow control and fractional sampling
— TT Transfer tube (Figures 4 to 12)
The particulate sample transfer tube shall be:
as short as possible, but not more than 5m in length,
equal to or greater than the probe diameter, but not more than 25mm in diameter,
exiting on the centre-line of the dilution tunnel and pointing down-stream.