J.P. Instruments EDM 700/800/711 Pilots Guide User Manual
Page 43
For Your Safe Flight
Page 39
Fine Tuning the K Factor
The K factor shown on the fuel flow transducer does not take into
account your aircraft’s particular installation. Fuel hose diameters and
lengths, elbows, fittings and routing can cause the true K factor to be
different from that shown on the fuel flow transducer.
You must use the following procedure to fine tune the K factor.
1. Make at least three flights of about two to three hours each. Note the
actual fuel used (as determined by topping the tanks) and the EDM
calculation of the fuel consumed for each flight = USD.
Flight
Fuel USED shown by EDM
(total tank - REM)
Actual fuel used by topping tanks
1
2
3
Total
2. Total the EDM fuel used and the actual fuel used.
3. Record the current K factor here ____________________ and in
the table below.
4. Calculate the New K Factor as follows:
New K Factor = (EDM fuel used) x (Current K factor)
(actual fuel used)
New K Factor = (
) x (
)
(
)
Every time you fine tune the K factor, record the measurements here:
Date
EDM
fuel used
actual
fuel used
Current K
factor
New K factor
=
x
/
Pilot’s
initials