Kanardia INDU ALTIMETER, Руководство пользователя

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Altimeter — Manual 5. Troubleshooting
5 Troubleshooting
5.1 Freeze During Engine Start
In certain aircraft installations instrument freezes and then reboots
itself, when some large current consumers are switched on. This is
caused by a very short voltage drop as a consequence of the con-
sumer’s power demand.
A simple electronic circuit illustrated in Figure 6 may help in this
case. The circuit consist of two elements.
•
The diode prevents reverse flow from the capacitor. We recom-
mend Schottky Diode 1N5818G. You can also use some other
diode, which has a low voltage drop, 1 A forward current and
at least 20 V of blocking voltage.
•
The capacitor serves for a very short energy reserve. Use an
aluminium electrolytic capacitor with about 1000
µ F, at least
25 V and at least 100
◦
C working temperature.
Instrument
+12 V
GND
Diode
1N5818G
Capacitor
1000 μF, 25V, 108°C
Figure 6: Circuit that may prevent sudden voltage drops in certain
installations.
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