15
of the data saved will be displayed on the screen. Press key –s for return to test menu.
4.1.11 Choose
AVE
via Key-S and then press Key-▲ or Key-▼ to inspect the display of
the minimum value, real-time value and maximum value, and then return to display of
average value.
4.2 Double idle(accompanying tachometer)
As said above in section 3.8 and 3.5, inputting number plate of the vehicle to be
tested and selecting double idle.
4.2.1 Choose
STR
in test menu via S. Press E and the prompt
Set Speed
will
appear on the display screen (the display screen is the same as that mentioned in section
4.1.1)
4.2.2 The same as 4.1.2
4.2.3 The same as 4.1.3
4.2.4 The same as 4.1.4
4.2.5 After preheat of engine is completed, the screen prompt notices: adjust RPM to
fast idle (50% of rated speed), as following:
4.2.6 The screen will have the following prompt notice after RPM is adjusted to normal
range of fast idle:
4.2.7 After probe injected into the exhaust, the instrument enters fast idle test when
exhaust gas gets into optical path.
Fast idle test is 45 seconds altogether, first 15 seconds are for preparation and the
following 30 seconds are for formal test. The maximum value, minimum value and
average value will be obtained.
4.2.8 After fast idle test is completed, the instrument will prompt notify:
Retard to 2500r/min
S: exit
Put the probe in the exhaust
keep fast idle
,
S: exit
testing
,
wait
……
44
keep fast idle
,
S : exit