Dynon Avionics EMS-D10 Installation Guide - Manual (Page 56)

EMS Configuration
Fuel Flow
If the fuel flow transducer has been installed, set the
DISPLAY parameter to either TEXT or DIAL. When set to
TEXT, the fuel flow indication is displayed as a numerical
value above a graphical fuel pressure dial. When set to
DIAL, the opposite is true. Note that changing this value
toggles the equivalent value in the FUEL PRESSURE
menu. Fuel flow can also be displayed as an info bar, as
described in the EMS-D10 Pilot’s User Guide > Global
Configuration Settings > Info Item Configuration section.
Select the alarm mode and the analog bar thresholds as described in Alarm and Color Threshold
Configuration on page 5-2. Next, find the K-value associated with
your fuel flow transducer. If you have the Floscan 201B (Dynon P/N
100403-001), this number can be found on the tag that came with the
transducer. The K-value for your transducer is 10 times the
number shown after the dash. So, if your transducer had the tag
shown at right attached to it, you would enter a K-value of 29590 in
the K-VALUE section of the Fuel Flow configuration menu. If you
have lost your tag, a starting K-value of 30000 will be close enough
to begin using the function.
5-14 EMS-D10 Installation Guide
If you have the EI FT-60 “Red Cube” (Dynon P/N 100403-003),
enter a starting K-VALUE of 68000.
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, KFactorRatio.
Now perform this calculation: CurrentKFactor*KFactorRatio. Enter this number as your new K-
Factor.
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 K-factor; if it reads lower than you expect, decrease the K-factor.
If the GLOBAL > ENGINE TYPE setting is set to ROTAX, a return flow (RETRN FLOW)
setting is available in this menu. This function is generally used only by Original Equipment
Manufacturers (OEMs).