J.P. Instruments EDM-900 User Manual

For Your Safe Flight ............................................. Page 35
Common Misapplications
Some of the more common misapplications made by first-time
EDM users are presented here in an attempt to help you avoid
similar problems.
Problem
Situation
Corrective action
Lean Find finds a
‘peak’ too soon.
Failure to pre-lean before
performing Lean Find or
you stopped leaning.
 Follow the pre-lean
procedure page 29.
Leaning too slowly.
 Lean more quickly.
Peak not found
Lean Find not activated or
you stopped leaning.
 Lean at the speed of
approximately 10°F per
second.
Off-scale EGT bars,
too high or low
You forgot that you set the
EDM in the Normalize
view and later notice that
the EGT bars go off-scale.
 The higher sensitivity
(10° per segment) of
the Normalize view can
quickly go too high or
low off-scale with only
small changes in EGT.
First cylinder to
peak is not the
hottest
This is normal. The first
cylinder to peak is not
necessarily the hottest.
 None
EGT rises during
single magneto
check
This is normal, due to
incomplete combustion
persisting longer.
 None
EGT not uniform
during low power
operation
This is normal. Fuel and
air distribution is not
optimal at low power
settings.
 None
No display of %HP
FF, MAP, RPM, OAT not
reading or not equipped
 FF, RPM, OAT, MAP
required for %HP

J.P. Instruments EDM-900 Specifications

General

Brand	J.P. Instruments
Model	EDM-900
Category	Control Panel
Language	English