Technical data

Section 906
Digital RPM Indicator
Page Date: 6. April 2010
Pilot´s Operating Handbook
EXTRA 300LT
906 DIGITAL RPM INDICATOR
906.1 GENERAL
The EXTRA 300LT is as standard equipped with the "P-1000" Digital rpm indicator
.
906.2 LIMITATIONS
Not affected.
906.3 EMERGENCY PROCEDURES
Not affected.
906.4 NORMAL PROCEDURES
Not affected
906.5 PERFORMANCE
Not affected.
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.
RPM RANGES
The face of the indicator is placarded with the unchanged engine rpm operating range.
Additionally the engine operating ranges are indicated by the large green, yellow, and red
LEDs. These LEDs are located on the upper right corner of the indicator face.
2400 2700 3500
700 2400 2700
Green -------- Yellow -------- Red --------