J.P. Instruments EDM-960

For Your Safe Flight Page | 23
Rich of Peak leaning is as simple as:
A. Pre-lean your mixture.
B. Tap the LF button (verify ROP appears).
C. Lean mixture until LEANEST flashes (peak found).
D. Enrichen to the desired value ‘Rich Of Peak’.
R
Procedure
Scanner Example
(one engine)
Comments
1
Establish cruise at
65 to 75% power.
2
Pre-lean the
mixture to 50°F
estimated rich of
peak on any EGT:
_________°F.
EGT 1490
CHT 370
* See ‘Pre-leaning’ page 23.
3
Wait one minute
Let engine stabilize.
4
Tap the LF button
ROP
Start Lean Find (if LOP
appears hold STEP & LF
until ROP appears)
5
Lean the mixture at
approx. 10°/second
without pausing.
EGT 1520
FF 13.8
Flashing cylinder I.D. box
identifies that EGT
increased at least 15°F.
EDM is now looking for first
EGT to peak.
6
Stop leaning when
a column begins
flashing. You will
see LEANEST for
one second,
followed by:
EGT 1545
FF 12.4
Flashing cylinder I.D. box
AND its column indicates
leanest cylinder. Due to
thermal inertia this will
usually be about -15°F
down the lean side of peak.
7
If you hold PEAK,
the values of EGT
and FF when peak
was found are
displayed.
EGT ↑1560
FF 12.9
Captured peak EGT value
and peak FF are displayed.