30
DPM-RT-2 Operating Manual
a)
Testing equipment shall comply with clause 8.2
Diesel Particulate Monitoring Equipment.
Note:
It is not possible to use the Bosch Smoke Meter for the above tests due to its inability to measure over
a 60 second sampling period.
b)
Exhaust sampling and analysis shall be carried out by a person competent to the satisfaction of the
mine mechanical engineer to carry out such test or by a licensed laboratory.
c)
The diesel engine shall be operated until the engine temperature stabilises. Exhaust particulate
sampling and analysis shall be performed when the diesel engine is at normal operating temperature.
d)
The vehicle must be safely chocked and the vehicle brakes must be applied.
Important Safety Notice
As engines must be tested in the load condition requiring the drive train to be engaged during testing it is
important the vehicle is adequately chocked or restrained and the brakes applied to ensure it ca
nnot “jump”
or run away while the diesel engine is under throttle during the test.
e)
Place vehicle in third gear or other gear as specified by the equipment manufacturer to carry out the
test.
f)
Run the engine at idle speed
g)
Insert sensor probe into the undiluted raw exhaust before any particulate treatment.
Note:
This may be downstream of catalytic converters and water based scrubbers but must be before any
particulate filter.
h)
Testing shall be carried out over a 60 second cycle and on the undiluted raw exhaust as indicated in
Figure 2
below.
Notes:
1.
It is important that the timing of the idle and full throttle settings is as accurate as possible. To ensure
good repeatability, it is advisable for the operator to practice the procedure several times prior to
collecting a sample.
2.
Sampling should commence in the first idle period and continue until the final idle period.
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.
