Cessna 172 Owner's Manual page 167

J.P.INSTRUMENTS
PO BOX 7033
HUNTINGTON BEACH CA 92646
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
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
(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 EGT-701. 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 EGT-701 sensing
thermocouples are not collocated with the primary instrument sensing probes. Therefore, airplane
flight manual limitations based on primary instrument indication take precedence over
EGT-701
II OPERATING LIMITATIONS
A. The EGT-701 may not replace any existing instrument or indicator required by the
aircraft type design or operating limits.
B. The EGT-701 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
After establishing desired cruise power depress the LF button to activate the Lean Find
Mode. As the mixture is leaned, one column on the EGT-701 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 EGT-701 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
o o
F) and OIL (230
CAUTION
Comply with manufacturer's Airplane
Flight Manual leaning procedure.
Do not exceed applicable engine
or aircraft limitations.
6/17/99
Page 4 of 4
Airplane/Rotorcraft Flight Manual
F) are lower than the actual aircraft limits and can not
o o
F, "TIT" 1650
Supplement No. 1
EGT-701
o
F Hi; "OIL" Lo 90
Rev B
F; "CLD"
those of the