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DPM-RT-2 Operating Manual
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
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Alternative method
