J.P. Instruments EDM 700/800/711 Pilots Guide - Manual (Page 19)

For Your Safe Flight Page 15
Continue leaning slowly without pausing. With a vernier mixture
control, turn the knob about a quarter turn every second. With a non-
vernier or quadrant mixture control, lean slowly and smoothly about
1/16 inch every five seconds. Eventually, one cylinder will reach peak
before any of the other cylinders. The EDM will determine this
automatically. Notice that this cylinder does not necessarily have the
hottest EGT.
The EDM will indicate success in finding a peak by displaying the
words
LEANEST for two seconds, followed by flashing the column and
displaying the value of the EGT of the cylinder that peaked first. The
word
SET will also be displayed. (With the Fuel Flow Option the current
fuel flow rate will be displayed on the right side of the digital display
instead of the word
SET.) The flashing cylinder will be locked—or set—
into the digital display during the remainder of the LeanFind procedure
to allow you to set the final mixture. The peak EGT value is remembered
by the EDM and will be displayed as long as you hold the LF button.
You may now enrichen the mixture to operate at peak or continue
enriching to 100° rich of peak, or a value of your choice, consistent with
the procedures defined in your aircraft engine manual.
If you lean too much, the EGT will drop and the engine will be operating
lean of peak.
I340 SET
STEP EDM-700 LF
° F
1 2 3 4 5 6 T
N P
_
JPI
_
LEANEST LEANEST
displayed for
two seconds
when peak is
found
Leaning Rich of Peak
_
EGT
%
Limit
_
250
350
450
CHT
TSO
Cylinder
number of the
LEANEST
cylinder flashes
Dot indicates
LEANEST
cylinder
Column of the
LEANEST
cylinder flashes
EGT of the
LEANEST cylinder
displayed with the
the word SET
Lean of Peak Leaning with GAMI injectors