Section 906
Digital RPM Indicator
906 - 4 Page Date: 19. February 2014
PilotĀ“s Operating Handbook US
EXTRA 330LX
906.6 WEIGHT AND BALANCE
Refer to the Equipment List in Section 6 of this Handbook.
906.7 DESCRIPTION AND OPERATION OF THE SYSTEM
The operation of the indicator is straight-forward. After power is supplied to the indicator, the
engine is started, and the self tests are performed, the default display of the engine rpm
appears on the display. The default display is insured via the use of internal timers that will
restore the display to the current rpm even in the event that one of the panel buttons becomes
stuck or defective.
Internally, two independent tachometers watch the pulses received from each magneto. Each
tachometer is accurate to less than 1 rpm and can be individually enabled/disabled via
buttons on the face of the indicator.
Magneto-Control
Operation placard:
Press-and-release
Operation placard:
Press-and-hold
Hours Clear Trap
L DIM R
Status
RPM-
restriction
RPM range
buttons
Display
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