Cessna 172SPHUSR05 Pilot Operating Handbook page 478

S ECTION 9 - S UPPLEM E NTS
S U PPLEM ENT 24 - FAA APPROVED
Figure 1 . Astrotech Model TC-2 Clock/OAT Nolt Indicator
1 . OAT NOL T BUTTON - Volts are displayed at power up.
the button is pressed, the display switches to outside air
temperature in OF. Pressing the button again selects outside air
temperature in °C.
voltage.
2. ST/S P (ADV) BUTTON - When the ST/S P (Start/Stop) button is
pressed in the Clock Mode, the date is displayed for 1 .5 seconds
and then the display returns to the clock. During the set function
the button is used to advance the count of the digit currently
being set. When in the Timer Mode, the button alternately starts
and stops the elapsed counter with each push.
3. MODE BUTTON - The MODE button toggles between clock and
timer. Each time the button is pressed the mode changes.
While in the Timer Mode the word "TI M E R" is displayed below
the digits (as shown in Figure 1 ) .
4. R ES ET (S ET) BUTTON - When the RESET button is pressed in
the Timer Mode, it resets the timer to 00 :00. In the Clock Mode,
the button initiates the set function for setting the date and time
of day. The set function can be recognized by the Month (left
two) digits flashing. If the set function is not desired the MODE
button may be pressed to exit from the set operation.
S24-4
Pressing the button a third time selects
C ESSNA
MODEL 1 72S
UPPER LCD
WINDOW
LOWER LCD
WINDOW
0714R1028
When
Jan 3 1 /02