J.P. Instruments EDM 740 Pilots Guide - Manual (Page 29)

For Your Safe Flight Page 29
Operation for each Phase of Flight
Engine Run Up - while RPM is set to run-up value .
Suggested setup:
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.
NOTE: 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.
NOTE: At high density altitude an overly rich mixture can significantly
reduce engine power.