SECTION 7 CESSNA
AIRPLANE AND SYSTEM DESCRIPTION MODEL T182T NAV III
GFC 700 AFCS
U.S.
ELECTRICAL SYSTEM (Continued)
ELECTRICAL SYSTEM MONITORING AND
ANNUNCIATIONS
AMMETERS
Current indication (AMPS) for both the main and standby batteries is
provided at the bottom of the EIS bar (along the left margin of the MFD
or PFD), labeled M BATT S. Main battery current is numerically
displayed below the M. Main battery current greater than -1.5 amps is
shown in white. Standby battery current is displayed numerically below
the S. A positive current value (shown in white) indicates that the
battery is charging. A negative current value (shown in amber)
indicates that the battery is discharging. In the event the alternator is
not functioning or the electrical load exceeds the output of the
alternator, the main battery ammeter indicates the main battery
discharge rate.
In the event that standby battery discharge is required, normal steady
state discharge should be less than 4 amps. The STBY BATT
annunciator will come on when discharge rates are greater than 0.5
amps for more than 10 seconds. After engine start, with the STBY
BATT switch in the ARM position, the standby battery ammeter should
indicate a charge showing correct charging of the standby battery
system.
STANDBY BATTERY ANNUNCIATION
The STBY BATT annunciator will come on when discharge rates are
greater then 0.5 amps for more than 10 seconds. This caution
annunciation is an indication that the alternator and the main battery
are not supplying the power that is required by the essential bus. If the
condition causing the caution can not be resolved, flight should be
terminated as soon as practicable.
(Continued Next Page)
T182TPHBUS-00
7-64
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