MO DAY YEAR
Champion Aerospace LLC
1230 Old Norris Road
Liberty, South Carolina, U.S.A. 29657
© 2009 Champion Aerospace LLC
www.championaerospace.com
CHAMPION AEROSPACE LLC PROPRIETARY INFORMATION - Subject to the restrictions on the Title page
ISSUED
PAGE REV.
PAGE NO.
REVISED
MO DAY YEAR
01
18
96
L-1502
03
01
09
C
2-14
B.
Connect the positive terminal of the enunciator light assembly to the aircraft electrical bus at a
suitable location. The enunciator light should receive power whenever the aircraft master switch
is in the “ON” position.
C.
Connect the orange wire of the low voltage control harness to the negative terminal of the
enunciator light assembly.
2.4.3 Reconfirm completion of steps in Section 2.2.
2.5
INSTALLATION OF LASAR
®
SYSTEM WITH TACHOMETER DRIVE SIGNAL
Some aircraft tachometers receive an engine speed signal from a magnetic sensor which is installed in
the magneto frame replacing the air vent. Each time a rotor magnet passes the sensor, a sinusoidal
pulse is induced which is translated by the tachometer into engine RPM. Because rotors in most
conventional magnetos utilize two magnets, the tachometer must be modified to correctly translate the
additional pulses induced by the LASAR
®
system’s four pole rotor magnets. The tachometer manufac-
turer should be contacted to determine the level of compatibility with LASAR
®
systems.
Other aircraft tachometers may interface with conventional magneto P-leads to receive engine speed
signals. LASAR
®
systems, however, do not provide the same P-lead signals or wiring attachment
points as conventional systems. As an alternative, the LASAR
®
controller generates the engine speed
signal shown in Figure 2-9. This signal may be transmitted to the tachometer by connecting the brown
wire in the low voltage control harness to the tachometer input terminal. Because the speed signal
generated by the LASAR
®
controller is different than the signal transmitted through conventional ignition
system P-leads, modifications to the tachometer may be necessary to correctly interpret engine RPM.
The tachometer manufacturer should be contacted to determine the level of compatibility with LASAR
®
systems.
Figure 2-9
Engine Speed Signal
2.5.1 Contact the tachometer manufacturer for instrument compatibility with LASAR
®
systems.
2.5.2 Install Low Voltage Control Harness
A.
Install the low voltage control harness as described in Section 2.2.
B.
If the engine speed signal generated by the LASAR
®
controller is to be used, connect the brown
wire of the low voltage control harness to the tachometer input terminal.
2.5.3 Reconfirm completion of all steps in Section 2.2.
4.5 V
minimum
1.5 V
maximum
2 ms
2 ms
frequency (f)
LASAR
® Output Resistance
100 ohms
Tachometer Input Resistance
>3 K ohms
4 Cylinder Engine RPM
30 f
4 Cylinder Pulses Per RPM
2
6 Cylinder Engine RPM
20 f
6 Cylinder Pulses Per RPM
3
