Cessna 172S Pilot Operating Handbook page 113

CESSNA
MODEL 1 72S
The Davtron Model 803 digital clock combines the features of a
clock, outside air temperature gauge (O.A.T.) and voltmeter in a
single u n it. The unit is designed for ease of operation with the use
of three buttons. The upper button is used to control sequencing
between temperature and voltage. The lower two buttons control
reading and ti m ing
Temperature and voltage functions are d isplayed in the upper
portion of the unit's LCD window, and clock/timing functions are
d isplayed in the lower portion of the unit's LCD window.
The digital display features an internal l ight (back l ight) to
ensure good visibility u nder low cabin lighting conditions and at
n ight. The i ntensity of the back light is controlled by the PAN EL L T
rheostat. I n addition, the display incorporates a test function which
allows checking that all elements of the display are operating.
There is no change to the airplane l im itations when the digital
clock/O .A.T. is installed.
E M E R G E N C Y P R OC E D U R ES
There is no change to the airplane emergency procedures when
the digital clock/O.A.T. is i nstalled.
July
8/98
SU PPL E M ENT 9
s u pp
DIGITAL C LOCK/O.A.T.
S E CTION 1
G E N E RA L
functions related
S ECTION 2
LIMITATIONS
S ECTION 3
S ECTION 9 S U PPL EM ENTS
-
FAA APPROVED
-
M NT
to the digital clock.
89-3