Hi Dave,
I still think you have a noise/grounding problem. If noise gets into
one of the inputs, say the NMEA, there is usually a buffer to handle
excessive inputs. If that buffer gets overloaded, the chart plotter might
act goofy until the buffer gets emptied. I would make sure you have a
single point grounding system that all goes back to one ground point. Make
sure all connections are tight.
Gary
S/V Kaylarah
C&C 37+
East Greenwich, RI, USA
~~~~~~~_/)~~~~~~
On Fri, Sep 30, 2016 at 8:21 AM, David Knecht via CnC-List <
cnc-list@cnc-list.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
>
>
>
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