Mid-Continent Instruments and Avionics, Wichita, KS
REV. B, October 31, 2012
31
Manual Number 9017782
3.3.2.9
EXIT MENU
The EXIT MENU action allows the user to manually exit the Options Menu and
return to the active attitude indicator display. There are no selectable options.
After confirming any setting by selecting it, that setting will become active and
be saved in memory, regardless of whether the EXIT MENU command is selected
or it times out (approximately 10 seconds of inactivity) and automatically reverts
to the attitude display. See Figure 3.17.
FIGURE 3.17
3.3.3
BRIGHTNESS ADJUSTMENT
The MD302 unit can be configured to adjust its brightness based on the aircraft’s manual
lighting bus control or automatically based on the ambient lighting conditions using the
photocell sensor on the unit. For either option (selected in the Configuration Mode, see
Section 4) the pilot or crew member can override the current brightness and manually
increase or decrease it. To do this, briefly press the control knob. The brightness bar will
appear overlaid on the attitude display and turning the control knob will increase or
decrease the current setting.
While the unit remains powered, the manual adjustment will remain saved and any
change in the lighting bus or photocell sensor will increase or decrease the brightness
from the newly set manual adjustment.
When the unit is powered off, the manual adjustment will be reset and default to the
lighting response curve programmed into memory per the settings in the Configuration
Mode setup.
3.4
EMERGENCY OPERATION
3.4.1
IN FLIGHT
The MD302 is designed to operate reliably and provide the critical situational awareness needed
even if the aircraft power systems fail. When this occurs, the unit provides emergency operation
by continuing to perform seamlessly and uninterrupted in Flight Mode.
The MD302 contains an internal and field-replaceable True Blue Power
®
Nanophosphate
®
Lithium-
ion battery which recharges during normal flight and provides a minimum of one (1) hour of
operation and as much as 2.5 hours when new.
When primary aircraft power to the unit is lost in flight, the unit will immediately begin operating
on internal battery power. This is indicated by a green battery icon displayed in the top right of
the attitude display. See Figure 3.18.
