5.9.1.1 Detailed descriptions of the recommended
sampling and analysing systems are contained in 5.9.2 to 5.9.4. Since
various configurations may produce equivalent results, exact conformance
with these figures is not required. Additional components, such as
instruments, valves, solenoids, pumps, and switches, may be used to
provide additional information and co-ordinate the functions of the
component systems. Other components which are not needed to maintain
the accuracy on some systems, may be excluded if their exclusion is
based upon good engineering judgement.
5.9.1.2 The settings of inlet restriction and
exhaust backpressure shall be adjusted to the upper limits as specified
by the manufacturer in accordance with 5.2.4
and 5.2.5, respectively.