Bailey Moyes 912 Dragonfly, Maintenance Manual

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Crimp the mating connectors onto the extension wire. Plug the color-coded leads onto the matching
color extension wires. Secure the probe leads with suitable wire clamps to prevent them from chaffing
against the engine or airframe. Heat shrink tubing can be used to protect the leads from abrasion, and
insulate the electrical connections to the probe.
NOTE : The length of wire on the EGT & CHT probes, or the extension wire may be shortened as
desired for your installation.
5.3 Verify the Wiring – A Quick Check
Take a moment now to review all wiring connections you have made to the EIS. Double check the
following wiring:
a) power
b) ground
c) tachometer connections
d) Verify that the same ground wire is not used as both a ground to the engine for the EIS, and as a
ground for the ignition kill switches. Verify that these separate ground leads do not connect to the
engine in such a way that they could be become disconnected from the engine, but remain connected
together. Do not use the same connection to the engine for these ground leads.
Finally, install the connector backshell using the supplied hardware. Secure the wiring, using cable
clamps to the aircraft structure so that no strain is transmitted to the connector. Plug the connectors
into the EIS and secure them to the instrument with the screws included with the back shell.
6. Check-Out
6.1 Initial Application of Power to the Instrument
Apply power to the system Verify that the LCD display becomes active. The instrument will be on
display page 0. If this operation is not observed, immediately turn off power to the EIS and recheck all
wiring---especially power, ground, 4.8V excitation output and 12V fuel flow power output.
At this point, you may wish to completely configure the instrument for your installation. Refer the
section “Configuring the EIS for your Installation”.
6.2 Tachometer Initial Test
Turn on the EIS. The tachometer will display 0 when the engine is not operating. Refer to the
“Configuration Set Pages” section, and set the TachP/R according to the type of engine you have.
Turn off the EIS. Start the engine; turn on the EIS and verify that the tachometer reading is active and
appears reasonable.
6.2.1 Testing Tachometer Inputs
Two inputs are provided for the tachometer sensing. The EIS will use tachometer input 1 when a
tachometer signal is sensed. If tachometer input #1 is not providing any RPM indication, the EIS will
use the tachometer input #2. Each input must be tested to make sure it is functioning. This test is
accomplished by turning off tachometer input #1 (such as by turning off the magneto), and observing
is tachometer input #2 provides an accurate and stable tachometer reading. Repeat this by turning off
the tachometer input #2 and verifying the tachometer input #1 is accurate and stable.