J.P. Instruments EDM 900 Pilots Guide - Manual (Page 44)

Page 44 Engine Data Management
Date fuel used fuel used K factor factor
=  x  / 
initials
Setting the K factor
This procedure differs somewhat from setting other parameters. If you
haven’t already done so, start the pilot programming procedure by
simultaneously holding the STEP and LF buttons for a few seconds until
you see the word PROGRAM appear.
1. Tap STEP button to advance to the KF-SET screen KF=29.90 .
2. Hold both the STEP and LF buttons for a few seconds until the first
digit flashes (shown here as a larger digit for illustration purposes):
2 9.00
3. Tap or hold the LF button to change flashing digit: 1 9.00
4. Tap STEP button to move to next digit: 1 9 .00
5. Tap or hold the LF button to change flashing digit: 1 8 .00
6. Tap STEP button for next digit: 18. 0 0
7. Repeat items 5 and 6 for the remaining two digits.
8. Hold STEP and LF buttons until the parameter is saved.
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. Fine tuning is
accomplished over multiple flights of sufficient duration and repeatable
conditions. Use the process below to calculate and correct the K Factor
to achieve maximum performance. Note: This process adjusts the K.
factor only half of the correction. We recommend this because it
minimizes ‘chasing’ a correction target back and forth