Bailey Moyes 912 Dragonfly, Руководство по обслуживанию

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10. Detailed Description of Other Functions
10.1 Flight Timer
At power-up of the EIS, the flight timer shows the length of the previous flight in hours and minutes.
This makes it easy to recall the last flight time if power is turned off to the instrument before the time
is noted. This time will be displayed until 3 minutes into the next flight, at which time it will be replace
with the length of the current flight in hours, minutes and seconds. It is especially useful for measuring
the progress on cross country flight since it never forgets to start! For those who forget to wear a
watch, and who don’t have a clock or a GPS, this timer can be handy for navigation purposes also!
10.2 Unit Temperature
This function is displayed on the hourmeter page, and shows the internal temperature of the
instrument. It is used by the instrument for cold-junction compensation of the EGTs and CHTs. It is
also useful for estimating the cabin temperature, as it tends to stabilize at about 30-35 degrees F above
the ambient temperature.
The unit temperature can also be checked to see if the instrument is being exposed to excessive heat.
Unit temperatures above 170 degrees F can degrade the readability of the display. (The display will
return to normal when it is cooled to normal temperatures.) Temperatures above 200 deg F can
activate the internal thermal fuse, shutting down the instrument.
10.3 H2O (Water Temperature Function)
This function is provided for those using water-cooled engines. It may also be useful for measuring
other temperatures in the range of 80-300 degrees F, such as under cowl temperatures, especially for
composite airplanes.
11. Use with Precision Airmotive Eagle Engine Controller
The EIS is compatible with the Precision Airmotive Eagle engine controller. The following notes apply
for installations with this system.
Fuel Flow
- No flow sensor is installed in the fuel lines. The fuel flow output from the engine
controller should be connected to the EIS fuel flow input as shown in the engine controller
documentation. Per this documentation, a 1k ohm resistor is connected to the fuel flow output of the
engine controller, and the other side of this resistor connects to 5 or 12V. We recommend using the
fuel flow +12V for this voltage. For the fuel flow function to work, the EIS must be equipped with the
fuel flow option. The FloCal entry should be set to 177, and adjusted as necessary so that the totalizer
is accurate. When the totalizer is accurate, the fuel flow reading will be accurate. It is normal for the
fuel flow readings to fluctuate as much as 10% at times.
Tachometer - Similar to the fuel flow input, the tachometer input is "pulled-up" with a 1k ohm resistor
to 12V. The EIS fuel flow output is ideal, and can easily supply the necessary power for both the fuel
flow and tachometer sensing.
CHT - The engine controller monitors 2 cylinder head temperatures. The CHT probe used for the
engine controller can not be used for the EIS CHT input. To monitor these cylinder head temperatures
it is necessary to use a dual CHT probe (available from Aircraft Spruce). The EIS requires a type J
thermocouple.