SECTION 7 CESSNA
AIRPLANE AND SYSTEMS DESCRIPTION MODEL 208B 867 SHP
GARMIN G1000
U.S.
ELECTRICAL SYSTEM (Continued)
VOLTAGE AND AMPERAGE DISPLAY
The status of the electrical system can be monitored on the MFD (non-
reversionary mode). Battery current (BAT AMPS) and bus voltage
(BUS VOLTS) are displayed on the default EIS-ENGINE display page.
By pressing the ENGINE softkey and the SYSTEM softkey, the EIS
pages changes to the EIS-Systems display where generator current
(GEN AMPS), and bus voltage (BUS VOLTS) can be monitored
simultaneously. A negative display on BAT AMPS indicates battery
discharge, while a positive display indicates battery charging. A
negative display on BAT AMPS will be shown in amber to remind the
pilot to reduce electrical load, or increase Ng, to maintain battery
charge.
GROUND SERVICE PLUG RECEPTACLE
A ground service plug receptacle permits the use of an external power
source for cold weather starting and during lengthy maintenance work
on the electrical and avionics equipment. External power control
circuitry is provided to prevent the external power and the battery from
being connected together during starting. The external power
receptacle is installed on the left side of the engine compartment near
the firewall.
The ground service circuit incorporates polarity reversal and
overvoltage protection. Power from the external power source will flow
only if the ground service plug is correctly connected to the airplane. If
the plug is accidentally connected backwards or the ground service
voltage is too high, no power will flow to the electrical system, thereby
preventing any damage to electrical equipment.
208BPHCUS-00
7-98
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