Manual Number 9018205 Revision F, April 1, 2021
20
Flight Timer Mode
When in UTC mode, pressing the Mode button once changes the unit to Flight Timer mode
and the FLIGHT annunciation will be backlit (refer to Figure 4.9). To activate the flight timer, a
ground or aircraft power signal must be supplied to the Flight Timer Enable Pin (see Tables
3.3 and 3.4). This can be provided from an event-based relay (such as engine start or weight-
on-wheels) or it can be connected via jumper to the power or ground pins of the unit to
activate on unit power. The decimal point will blink briefly every 2 seconds to indicate that the
flight timer is active. Flight time is displayed in hours and tenths of hours up to 99999.9 hours.
The flight timer maintains the accumulated time (but does not run) when power is off.
Two flight timers are available on the CH93. The default flight timer is a resettable timer.
Pressing and
holding
the
MODE
button for two seconds will reset the timer. If the Flight Timer
Enable signal is active, the flight timer will reset to zero and resume counting. Pressing and
holding
the
–
or
+
button will display the non-resettable flight timer for keeping total
cumulative flight time. Releasing the
–
or
+
button will return the display to the resettable
flight timer. Note: the non-resettable timer value can be set or reset at the factory only. Refer
to Figure 4.10 for detailed instructions.
Figure 4.9
Flight Timer Mode (-5 unit shown)
Figure 4.10
Flight Timer Operation
