SCHEDULE 5 (ANNEX V to Directive 97/68/EC)ANALYTICAL AND SAMPLING SYSTEM

Figure 12 Partial flow dilution system with flow control and fractional sampling

PB pressure blower (Figures 4, 5, 6, 7, 8, 9 and 12)

To control the dilution air flow rate, PB may be connected to the flow controllers FC1 or FC2. PB is not required when using a butterfly valve. PB may be used to measure the dilution air flow, if calibrated.

• SB suction blower (Figures 4, 5, 6, 9, 10 and 12)