10
DPM-RT-2 Operating Manual
4.6.4
Initiate Test
After inserting the probe, check that the vehicle or plant under test is
chocked or braked to prevent movement and ensure that all personnel
are clear. With the test operator at the controls, check for clear line of
sight to the DPM-RT-2 screen or remote. When ready, press the
ENTER
button or tap the
Green Tick
button.
The green
LED
on the front panel will
illuminate
(steady) and a
5 second
countdown
will start, allowing the operator to anticipate the time when
measurements will commence.
4.6.5
Run Test
Immediately after the countdown, the instrument will start measuring
and storing PM concentration measurements, and the display will
change to the following
IDLE
screen.
To assist the operator, the green
LED
will
flash slowly
, indicating
measuring is ON and the engine should be at
normal idle speed
(with
the transmission engaged).
After 20 seconds the green
LED
with start to
flash quickly
, indicating the
Full Power
mode of the test. At this point the operator should rapidly
apply full throttle and hold the engine at
full throttle
.
The screen changes to show
FULL POWER
and updates the exhaust PM
concentration every second.
After 20 seconds at full throttle the green
LED
once again
flashes slowly
,
indicating a return to
normal idle speed
. The operator should rapidly
return the throttle to the
idle position
.
After 20 seconds at idle, measurements are terminated. At this point
the
LED
is
turned off
and the screen flashes a
FINISHED
message. The
screen then displays the overall test result together with some other
test data which may aid maintenance personnel to identify any
emission-related faults in the engine or fuel management system.
