J.P. Instruments EDM-900 User Manual

For Your Safe Flight ............................................. Page 13
Section 2 - Interpreting Data
Operation for each Phase of Flight
(Worth adding to your run-up checklist)
Engine
Run-Up
Suggested setup:
 Set engine to run-up RPM
Normalize view:
 Manual mode
Verify:
 Uniform rise of about 50°F in all EGTs in single
magneto operation.
 Uniform rise of EGTs with application of the mixture
control.
Be alert for:
 unusually low voltage (less than nominal battery
voltage)
 cold OIL and normal oil pressure
 abnormally high CHT
 Large drop in EGT on one cylinder in single magneto
operation—may be fouled spark plug.
Take-Off,
Climb, and
Full
Throttle
Operations
Suggested setup:
 Standard view
 Automatic mode
Verify:
 EGTs and CHTs consistent with past climbs. EGTs
should be in the 1100 to 1300°F range (100° to 300°F
cooler than cruise) due to fuel cooling.
Be alert for:
 High EGT in one cylinder, 300°F above the others may
indicate plugged injector or leaking manifold gasket on
a carbureted engine. At high density altitude an overly
rich mixture can significantly reduce engine power.
 If all EGT columns go off scale to the top of the
column, be sure you are not in Normalize view, as
indicated by the symbol NRM above the Scanner®
section.

J.P. Instruments EDM-900 Specifications

General

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