Cessna 17273274 Pilot Operating Handbook page 180

5
DIGITAL CLOCK
MODEL 172N
Test Mode
Display
Button
NORMAL PROCEDURES
CLOCK AND DATE OPERATION
When operating in the clock mode (see figure 2), the display shows the
time of day in hours and minutes while the activity indicator ( colon) will
blink off for one second each ten seconds to indicate proper functioning. If
the RH push button is pressed momentarily, while in the clock mode, the
calendar date appears numerically on the display with month of year to the
left of the colon and day of the month shown to the right of the colon. The
display automatically returns to the clock mode after approximately 1.5
seconds. However, if the RH button is pressed continuously longer than
approximately two seconds, the display will return from the date to the
clock mode with the activity indicator (colon) blinking altered to show
continuously or be blanked completely from the display. Should this
occur, simply press the RH button again for two seconds or longer, and
correct colon blinking will be restored.
The clock mode is set at the factory to operate in the 24-
hour format. However, 12-hour format operation may be
2
PILOT'S OPERATING HANDBOOK
---Activity Indicator
Figure 1. Digital Clock
SECTION 4
NOTE
. SUPPLEMENT
(Colon)
Clock Mode Indicator
(12 Hour Format Only)
Button
1 July 1979