19
select double idle
4.5.1 Start up test like 4.2.1
4.5.2 Press S for 20-second automatic zeroing count down. The same as 4.2.2 (namely,
the same as 4.1.2)
4.5.3 When zeroing completes, 30 seconds count-down for HC leftover test will
automatically start. It is the same as 4.2.3 (e.g. 4.1.3):
4.5.4 HC leftover passes test and the screen will show:
Adjust RPM to 70% of rated speed and preheat engine for 30 seconds. Press E after
lowering RPM to fast idle (50% of rated speed).
4.5.5 The screen will prompt notify: put the probe in the exhaust, please refer to 4.2.6
4.5.6 With exhaust gas entering the optical path of instrument, fast idle test begins, which
is the same as 4.2.7
4.5.7 The screen shows as following when the test time ends
4.5.8 The screen shows as following when RPM is retarded to ≤1100r/min
4.5.9 2 seconds later, it shows:
Conduct test with idle speed for 45 seconds.
5.10 The screen shows as following when test with idle speed ends:
After preheat
，
retard to fast idle
E : continue,S : exit
Retard to idle
E : continue S : exit
Read to test
，
wait
……
keep idle
，
S : exit
testing
，
wait
……
44
（
keep idle
，
S : exit
）
Take out the probe
！
S: exit
