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If the rotary knob is pushed to cancel the count-down timer, the unit will remain on and
continue to operate from battery power. The yellow ON BATTERY indication will be
shown.
Figure 18 - On Battery Indication & Shutdown Timer
If aircraft power returns, the unit will automatically switch back to aircraft power and start a
battery charge cycle (if all conditions are satisfied).
3.5
Battery Status
Internal battery status is shown in the lower left corner of the screen. When operating on the
internal battery, the colored icon will transition from green, to yellow, to red as the battery
drains. Charge levels above 80% are shown in green, between 25% and 80% is shown in amber,
and levels below 25% are shown in red. The charge is also shown numerically in percent.
Figure 19 - Charge Status Icon
If the battery is charging, a charge indicator will be shown over the colored icon as a small white
lighting bolt. There is a power-on delay of several minutes prior to the charger being internally
enabled. Charging will occur only if the following conditions are detected:
•
The battery has passed the power-on self-test
•
The battery is sufficiently low that a charge cycle is required
•
The ambient temperature is between 0°C and 40°C
•
The aircraft supplied voltage is > 10 VDC
