Rockwell Commander 112 - Ammeter

SECTION VIn
INSTRUMENTS
MAINTENANCE MANUAL
ROCKWELL
COMMANDER
112/B/TC /TCA
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FUEL HIGHT rANK
- A +
FUEl lEFT TANK
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LEFT FUEL QUANTITY
MODELS 112/112TC
AMMETER
RIGHT FUEL QUANTITY
MODEL 112B· THRU 544
MODEL 112TCA· THRU 13249
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FUEL LEFT TANK
X2443
LEFT FUEL QUANTITY
MODEL 112B· 545 AND SUBSEQUENT
MODEL 112TCA ·13250 AND SUBSEQUENT
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MODELS 1121112TC
MODEL 112B· THRU 544
MODEL 112TCA . THRU 13249
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FUEL RIGHT TANK
X2443
RIGHT FUEL QUANTITY
MODEL 112B· 645 AND SUBSEUUENT
MODEL 112TCA ·13250 AND SUBSEQUENT
ALTIMETER
Figure 8-5. Instrument Markings (Sheet 5 of 5)
AMMETER
The sub-panel mounted ammeter indicates current
flow, in amperes, from the alternator to the battery,
or from the battery to the electrical system (Figure
8-5). With the engine operating, and both halves of
the
split master switch ON, the ammeter indicates
the rate of charge being applied to the battery. In
the event
of. an alternator malfunction, or if the elec-
tricalload demand exceeds the alternator output the
am mete r will indicate the discharge rate of the
battery.
8-14
VOLTMETER
A voltmeter, located in the instrument sub-panel,
allows the pilot to monitor bus bar voltage (Figure
8-5). When the voltmeter is used in combination
with the
ammeter; alternator output, battery charge
or discharge rate and accurate bus bar voltage can
be determined. Normal voltmeter readings should
be within the green arc (12 - 15 volts). Refer to
Section X for details concerning overcharging or in-
sufficient voltage problems (as indicated by two red
arcs on the voltmeter scale).
Change 2
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