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chasb(at)satx.rr.com
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 Posted: Wed Jul 15, 2009 7:24 am Post subject: Fluctuating Amps |
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Bob, et. al.,
According to my MicroVision engine monitor, the amps on my RV-6 vary
almost constantly from "0" to around "17." A normal load should be
about "7." The voltage holds very steady at 13.8 monitored from my
essential bus, and all my avionics and other electrical equipment
seems to work as advertised. I have a B&C 60 amp alternator and a
generic Ford voltage regulator. The amperage is measured via a Hall
sensor on the main alternator feed line and I have not been able to
locate any loose wires or bad connections.
Any ideas of what the problem is? Is there an alternator or voltage
regulator failure in the offing?
Charlie Brame
RV-6A N11CB
San Antonio
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nuckolls.bob(at)aeroelect
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| Posted: Wed Jul 15, 2009 8:47 am Post subject: Fluctuating Amps |
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At 10:20 AM 7/15/2009, you wrote:
| Quote: |
Bob, et. al.,
According to my MicroVision engine monitor, the amps on my RV-6 vary
almost constantly from "0" to around "17." A normal load should be
about "7." The voltage holds very steady at 13.8 monitored from my
essential bus, and all my avionics and other electrical equipment
seems to work as advertised. I have a B&C 60 amp alternator and a
generic Ford voltage regulator. The amperage is measured via a Hall
sensor on the main alternator feed line and I have not been able to
locate any loose wires or bad connections.
Any ideas of what the problem is? Is there an alternator or voltage
regulator failure in the offing?
|
The first thing to do is confirm the variability
of the display. If the voltage readings are steady
then the regulator is fine. I'd do a temporary
installation of another ammeter in the b-lead
to confirm the micro-vision system performance.
Alternatively, you could simply remove the current
sensor all together and quit worrying about it.
Ammeters are more useful as a diagnostic tool and
then only if they're know to be trustworthy. If
your voltage is stable under all system load
conditions, probability is that the ammeter
is flakey. Try taking the b-lead wire out of the
sensor and see if it's still bouncing around
with "zero" excitation.
Bob . . .
---------------------------------------
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
---------------------------------------
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