J.P. Instruments EDM-960

For Your Safe Flight Page | 7
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. After the engine is warmed up,
use Lean Find to lean the mixture.
Cruise
Suggested setup:
 Normalize view
 Automatic mode
Be alert for:
 uneven EGTs (injected engines). Make fine
adjustments to throttle, then RPM, then mixture to
level the display columns.
 abnormal patterns of EGTs and CHT. (see
Engine Diagnosis Chart on page 9).
Descent
Suggested setup:
 Standard view
 Manual mode
Be alert for:
CLD: shock cooling alarm is set to -60°F. Average cool
rates of -40°F/minute to -50°F/minute are normal,
depending on the engine size.