J.P. Instruments EDM 700/800/711 Pilots Guide - Manual (Page 22)

Page 18 Engine Data Management
Operation for each Phase of Flight
Engine Run-Up
Suggested setup:
Runup 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
 abnormally high CHT
 a higher EGT on one cylinder in dual magneto
operation—indicates fouled spark plug.
Include your EDM on your run-up checklist.
Take-Off, Climb, and Full Throttle Operations
Suggested setup:
Percentage view
Automatic mode
Verify:
 EGTs and CHTs consistent with past climbs.
EGTs should be the 1100 to 1250°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.
 If all EGT bars go off scale to the top of the
column, be sure you are not in Normalize view.
At high density altitude an overly rich mixture can significantly reduce
engine power.