Page 8
Test Sequence:
TIP: Sometimes it is obvious that the emissions from a diesel engine
are unacceptable even without using a smokemeter to make a
measurement. Under such circumstances it is strongly
recommended that remedial action is taken on the engine before
any measurements are made. This will prevent premature
fogging of the smokemeter’s optics.
The AUTO600 Smokemeter operates using a Single Peak test mode. So
that on a single acceleration it is looking for the peak level of smoke
emission over a period of at least 3 secs. The start of the test is detected
automatically by a rising threshold of smoke level. (The sensitivity of this
threshold can be adjusted in MENU … TRIGGER. 3 is the standard
default setting.)
In fresh air the display will be 0.00 but inside an exhaust the background
level of smoke will be detected and displayed 0.2 or 0.3 / metre is typical.
The accelerator must be fully depressed in a smooth motion in under one
second and held at full acceleration for at least 3 seconds. The engine
must be at running temperature at the start of this test.
If the vehicle has been idling for some time it is normal to conduct a
‘dummy’ run with the probe outside the exhaust to pre-condition the
engine.
After 3 secs of operation above the threshold the peak reading is
displayed. There are 32 samples per second taken and these are displayed
on the screen.
Units of display can be Hartridge units (hu) or per metre (m).
After a test the test results can be printed using the KMIRP portable
printer. Always ensure the printer is switched on and there is a clear line
of sight between the printer and the handset.
