12
DPM-RT-2 Operating Manual
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.
4.7.5
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
for 8 seconds,
indicating measuring is ON and the engine should be at
normal idle
speed
(with the transmission engaged).
The green
LED
will then
flash quickly
for a further 8 seconds, indicating
the first
Full Throttle
(Regulated Speed) 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.
Subsequently, every 8 seconds the
LED
flashing speed and screen
display
alternate
between
Idle and Full Power Modes
.
Full Power
(8 seconds)
Full Power
(8 seconds)
Idle
(8 seconds)
Idle
(12 seconds)
After the final 12 seconds at Idle, measurements stop and the test is finished.
