This problem was solved by doing a full software reset and recalibration. It works fine now.
> At low wind speeds, my Navman 3100 wind display is erratic. It reads
> true for a few minutes, then for a few minutes it reads garbage. It
> tends to cycle between these two modes. At above ~10kts apparent, it
> seems to work fine all the time.
> The masthead wand (anemometer) and instrument are new replacements.
> The only thing that I haven't replaced is the mast wiring, which is
> new as of 2005.
> What would cause such odd behavior? What is the protocol between the
> masthead and the instrument? Is it NavBus? What are the electrical
> properties? Is this an analog circuit? Could there be some sort of
> grounding issue? If there is an intermittent connection on the wire,
> why would it phase in and out while at the dock and not moving, but
> then be fine and steady underway?
> Any suggestions or ideas would be appreciated.
> -JK
> At low wind speeds, my Navman 3100 wind display is erratic. It reads
> true for a few minutes, then for a few minutes it reads garbage. It
> tends to cycle between these two modes. At above ~10kts apparent, it
> seems to work fine all the time.
> The masthead wand (anemometer) and instrument are new replacements.
> The only thing that I haven't replaced is the mast wiring, which is
> new as of 2005.
> What would cause such odd behavior? What is the protocol between the
> masthead and the instrument? Is it NavBus? What are the electrical
> properties? Is this an analog circuit? Could there be some sort of
> grounding issue? If there is an intermittent connection on the wire,
> why would it phase in and out while at the dock and not moving, but
> then be fine and steady underway?
> Any suggestions or ideas would be appreciated.
> -JK
