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BA314001-en
3 Engines with a constant load, such as a diesel generator or pump should be analysed with
the load applied over the full 60 seconds.
i Start sampling timer on analyser.
j Continue to idle until timer indicates 8 seconds.
k Have an operator quickly apply full throttle, hold until timer indicates 16 seconds and quickly
release throttle.
l Idle engine until timer indicates 24 seconds.
m Quickly apply full throttle again, hold until timer indicates 32 seconds and quickly release
throttle.
n Idle engine until timer indicates 40 seconds.
o Quickly apply full throttle again, hold until timer indicates 48 seconds and quickly release
throttle.
p Idle engine until timer indicates 60 seconds then stop sampling timer on analyser.
q The total sampling time is 60 seconds. The sampling must pick up rise and decay of the
engine from idle to full throttle and return to idle for each cycle.
r Remove the probe if no further testing is required.
s Record the mean (average) engine exhaust diesel particulate concentration in (mg/m
3
).
Figure 2 - Diesel particulate load cycle - Alternative method
