Bailey Moyes 912 Dragonfly, Руководство по обслуживанию

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7.1.7 Transfer function
The transfer function mathematically defines the relationship between the auxiliary input voltage, and the
numeric data displayed on the instrument. This function is of no use to most users, but is provided here for those
interested in creating custom applications for the auxiliary inputs.
AuxDisplay = (AuxVoltage * AuxScaleFactor / 2.5) + AuxOffset
Where the AuxDisplay is the value shown on the screen, AuxVoltage is 0-5 Volts, the AuxScaleFactor is the
number entered into the 1SF, 2SF, 3SF or 4SF entry. The AuxOffset can be a positive or negative value.
Negative values are entered into the corresponding 1Off, 2Off, 3Off or 4Off entry as twice their magnitude – 1.
Positive entries are entered as twice their values. Thus, if the desired offset is –5, a value of 9 is entered into the
instrument. Similarly, if the desired offset is +8, 16 is entered.
7.2 Units – (Fahrenheit/Celsius and Gallons/Liters)
Three characters are displayed on this page. This first (leftmost) selects the units for the altimeter
setting, the next for temperature, and the rightmost character applies to the units used by the fuel flow
option.
a) To select inches of mercury (the US standard) for the altimeter setting, set the first character to an
"I"; for millibars, select "M".
b) To select fuel flow units (applies to flow rate & quantity) of U.S. Gallons, select “G”; for Liters
select “L” for the middle character.
c) To select temperature in units of degrees Fahrenheit, set the third (rightmost) character to “F”; for
Celsius select “C”.
CAUTION: The limits entered for all temperature data are not changed by this option. Be sure
to enter temperature limits in same units as you have chosen for display
.
7.3 FC1 & FC2 (Fuel Flow Activation Codes)
For instruments that include the fuel flow option, these entries have no use. For instruments originally
ordered without the fuel flow option, these codes are used to activate the fuel flow function, without
the need for returning the instrument to the factory for upgrade. In this way, you may easily add the
fuel flow option at any time by contacting Grand Rapids Technologies and ordering the fuel flow
option. We will supply you with the FC1 & FC2 codes, and a fuel flow sensor.
7.4 FloCal (Fuel Flow Calibration)
This entry allows for fine tuning the accuracy of the fuel flow function. The typical setting for entry is 200. To
adjust the FloCal entry to maximize the accuracy of the fuel flow function, keep track of the amount of fuel
burned by noting the amount of fuel added to the airplane over a period of time (at least 100 gallons), and the
amount of fuel used according the fuel flow function. If the amount of fuel used according the fuel flow function
is 1% low, increase the FloCal entry by 1%. Similarly, decrease the FloCal entry by the percentage the fuel flow
function is over-reporting fuel used.
The final FloCal entry should typically be within the range of 190-210. If your FloCal entry is outside this
range, you may have calculated it incorrectly, or you may have a problem with the fuel flow function caused by
flow fluctuations.
When dual fuel flow sensors are used, the FloBias setting must be made as described in the following section
before attempting to collect data for fine tuning of the FloCal setting.