David
This sounds like one of two issues but most likely an electrical sign
wave issue, with possible EMI interference also.
I have seen this before. Either shield your power cable (takes care of
EMI) or and I recommend this, put a power conditioner in front of all of your
electronics.
It does not sound like you are to a point of a brown out yet(kills
electronic components) but a conditioner will give them a stable signal.
Rod Meryweather
Sent from my iPhone
> On Sep 30, 2016, at 08:21, David Knecht <davidakne...@gmail.com> wrote:
>
> I have posted about this problem before, but still have not solved it. I
> have been struggling with a electrical system problem since I upgraded my
> electronics two years ago. I installed a Seatalk network, Raymarine EV-100
> autopilot and B&G Zeus T8 chart plotter. The problem is that periodically,
> the Zeus behaves like it has a mind of its own. The unit will begin beeping
> while the touchscreen acts like someone is activating menus and commands
> randomly. All kinds of problem ensue from that let alone that you can’t use
> the controls while it is happening. It happens intermittently, sometimes
> with engine on and sometimes off and I have not been able to identify the
> source. One of the things I have noticed is that it happens more often (but
> not exclusively) when the engine is running. Last weekend, I had an incident
> of this that might help someone understand it. I unplugged the Seatalk cable
> to the chart plotter to see if it had anything to do with the network (it
> doesn’t). I had the chart plotter on for about 45 minutes while I did other
> things and all was fine. Then I started the engine and the Zeus immediately
> began beeping and randomly activating menus. This continued for the time I
> had the engine running (about 15 minutes). So that would seem to point
> toward something people have suggested before- noise in the electrical system
> from the alternator. Here is what I don’t understand- I shut the engine off
> and the problem persisted with decreasing frequency for another 10 minutes or
> so and eventually stopped and it worked fine thereafter. If this were an
> alternator problem, is there some way it could persist for so long after the
> engine was shut down. Dave
>
> Aries
> 1990 C&C 34+
> New London, CT
>
> <pastedGraphic.tiff>
>
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