Dynon Avionics SkyView System Installation Guide - Manual (Page 178)

SV-EMS-220/221 Installation and Configuration
7-66 SkyView System Installation Guide - Revision S
enter a pulses/gallon value of 29590 in the pulses/gallon section of SETUP MENU > HARDWARE
CALIBRATION > EMS CALIBRATION > FUEL FLOW CALIBRATION. If you have lost your tag, a
starting pulses/gallon of 30000 will be close enough to begin using the function.
If you have the EI FT-60 “Red Cube” (Dynon P/N 100403-003), enter a starting K-VALUE of
68000 under SETUP MENU > HARDWARE CALIBRATION > EMS CALIBRATION > FUEL FLOW
CALIBRATION.
Over time, you may notice that the instrument’s computation of gallons or liters remaining
(based on fuel flow) is either high or low. This is a result of many factors, including individual
installation. To correct for this, follow this procedure:
Over several fill-ups keep a running total of the amount of fuel added. Keep a running total of
the GALS (or LTRS) USED parameter over this same time span.
Perform the following calculation:
) (
) (
actual FuelFilled
computed FuelUsed
. You should obtain a number that is
close to 1. We’ll call this number, FuelFlowRatio.
Now perform this calculation: CurrentPulsesPerGallon*FuelFlowRatio. Enter this number as
your new pulses/gallon value.
Observe the results over your next tank for accuracy. Repeat the above if necessary.
The general rule of thumb: if your GALS (or LTRS) USED reads higher than you expect, increase
the pulses/gallon; if it reads lower than you expect, decrease the pulses/gallon.
If your engine has a return fuel flow sensor, note that there is a second pulses/gallon setting
that is mapped to a second set of input pins. When a second fuel flow sensor is connected and
the pulses/gallon is adequately set, the fuel seen returning through the second fuel flow sensor
is automatically subtracted from the flow that is seen through the primary sensor. If you do not
have a second fuel flow sensor, you may ignore this setting entirely.
Fuel Computer Presets
Fuel Computer computations are based on measured fuel flow and the pilot’s input of the
aircraft’s starting fuel state. SkyView offers a few settings that allow the pilot to pre-program
full fuel and an optional second “preset” fuel quantity. Once programmed, typical aircraft fuel
loads are then quickly recalled under in the EMS > FUEL menu as described in the Pilots User
Guide.
There are three fuel computer options, found under SYSTEM SETUP > SYSTEM SETUP >
AIRCRAFT INFORMATION. They are only applicable if you have a fuel flow sensor installed:

TOTAL FUEL CAPACITY – set this to the total usable fuel on board when the tanks are full.
Once this is set, the pilot is prevented from accidentally setting more than this amount of
fuel on board.