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BA314001-en
l Stop sampling timer on analyser.
m 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.
n Remove the probe if no further testing is required.
o Record the mean (average) engine exhaust diesel particulate concentration in (mg/m
3
).
Figure 1 – Diesel particulate load cycle – Standard method
Alternative Method
Where testing in accordance with clause 6.3.2.1 above is not practicable (such as engines fitted
with manual clutches) diesel particulate testing of the undiluted raw exhaust of diesel engines
shall be carried out as follows:
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 cannot “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 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.
