Manual Number 9018205 Revision F, April 1, 2021
17
4.5 OPERATIONAL MODES
The CH93 has six modes of operation representing up to nine separate functions. Each mode,
when applicable, is indicated by a backlit annunciation on the display. See table 4.1 for details.
Mode
Annunciation
Functions
Local Time
Universal Time
Flight Timer
Timer
Voltage*
Temperature*^
(none)
UTC
FLIGHT
TIMER
VOLTS
OAT
Display and set local time
Display and set UTC time
Resettable and non-resettable flight timers
Elapsed (count up) and count-down timers
Displays bus voltage
Displays OAT and/or cockpit/cabin temperature
* Only available on Type 2 units
^ Requires temperature probe sensors
Table 4.1
Modes and Functions
Pressing the
MODE
button scrolls through the six different operational modes in a counter-
clockwise direction on the display. Figure 4.4 depicts the overall flow of the unit modes of
operation. Details for each mode are provided in the subsequent sections.
Figure 4.4
Modes of Operation
