J.P. Instruments EDM 760 Pilots Guide - Manual (Page 21)

I3 6 0 I4 5 2
S T E P L F
_
%
M A X
_
J P I
1 2 3 4 5 6 T
° F L R P
L F
E G T
E D M - 7 6 0
W h e n L F i s a c t i v a t e d :
T o s h o w t h e p r o g r e s s o f t h e l e a n i n g
p r o c e s s , t h e E D M - 7 6 0 s e l e c t s t h e h o t t e s t
c y l i n d e r f o r r e f e r e n c e i n t h e d i g i t a l d i s p l a y .
1 2 3 4 5 6 T
3 0 0
4 0 0
5 0 0
C H T
D o t o f h o t t e s t
c y l i n d e r f l a s h e s
w h e n E G T
r i s e s 1 5 ° a n d i s
a r m e d t o
p e r f o r m
L e a n F i n d
T e m p e r a t u r e
a n d " L F "
d i s p l a y e d
Continue leaning slowly without pausing. With a vernier mixture control,
turn the knob about a quarter turn every five seconds. 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-760 will determine this automatically.
Notice that this cylinder does not necessarily have the hottest EGT.
The EDM-760 will indicate success in finding a peak by displaying the
words
PEAK EGT for two seconds, followed by flashing the column of—
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-760 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
For Your Safe Flight Page 17