J.P. Instruments EDM 760 Flight Manual Supplement - Manual (Page 4)

J.P.INSTRUMENTS Airplane Flight Manual Supplement
PO BOX 7033 Document No. 760-
1
HUNTINGTON BEACH CA 92646
Rev NC
Page 4 of 4
GENERAL (cont.)
An alarm causes the digital function to flash as soon as the particular limit is exceeded. Factory set
alarm limits for CHT (450
o F) and OIL (230 o F) are lower than the actual aircraft limits and can not be set
by the pilot. The values may be adjusted to suit individual preference by a qualified technician. Other
factory set alarm limits are: "BAT" Voltage 15.5/11.0 or 31.0/22.0 Hi/Lo as appropriate; "DIF"
(differential Hi/Lo EGT) 500
o F, "TIT" 1650 o F Hi; "OIL" Lo 90 o F; "CLD" (Rate of change of cylinder
head temperature in degrees per minute) -60 degrees/minute. The pilot should be aware of the setting of
each alarm for his particular aircraft. An alarm is "Canceled" by holding the step button in for 5
seconds and seeing the word "OFF". Then, only that particular alarm is canceled. Canceled alarms will
not appear again until the power has been removed and reapplied to the EDM-760. The entire display
dims automatically depending on the ambient lighting.
The Cylinder Head with the Gasket probe and oil temperature will indicate generally higher temperatures
than instruments provided by the aircraft manufacturer because the EDM-760 sensing thermocouples are
not collocated with the primary instrument sensing probes. Therefore, airplane flight manual limitations
based on primary instrument indication take precedence over those of the EDM-760
II OPERATING LIMITATIONS
A . The EDM-760 may not replace any existing instrument or indicator required by the aircraft type
design or operating limits.
B.
The EDM-760 display may not be used in lieu of, or to supersede, engine operating limitations
established by the airframe or engine manufacturer during certification .
III. EMERGENCY PROCEDURES
No change
IV. NORMAL PROCEDURES
CAUTION
Comply with manufacturer's Airplane
Flight Manual leaning procedure.
Do not exceed applicable engine
or aircraft limitations.
After establishing desired cruise power depress the LF button to activate the Lean Find Mode. As the
mixture is leaned, one column on the EDM-760 display will begin blinking, indicating the exhaust gas
temperature for that cylinder has peaked showing its digital value along with the fuel flow (option) at
that time. Continue with the leaning procedure as recommended by the aircraft manufacturer while
monitoring the primary engine instruments and the EDM-760 display. Once the leaning procedure has
been completed, depress the Step button briefly to exit the Lean Find Mode and enter the Monitor Mode.
FAA APPROVED August 31 1999