[C320-list] Calibrate Knotmeter

[Stanley Rogacevicz]

   As the other Stan says.. It's not a linear adjustment... the 1, 2 or
whatever adjustment number you use seems to be a factor in the
calculation not just a plus or minus. So I'd say the best speed to do
your adjustment at is around 4.5 - 5k to minimize your error .... unlike
I did my first time at 2k because it made the math easy with the known
distance run I was doing.... accurate at 2k or 3k but waaay...off at 5k
or 6k - useless.
Stan
formerly "Christy Leigh"

>>> Stan <ola7442000 at gmail.com> 9/29/2006 2:31 PM >>>
I gave up a long time ago.  It's not a linear adjustment. i.e. On my
boat
between approximately 4.5 - 5.5 Kts. it matches the SOG.  Below 4.5
its
reads low. Above 5.5 it reads high.

I'm not really sure how this can be as the the little spinning wheel is
sort
of a generator.  The faster it spins, the higher the voltage it will
put
out.  The output voltage is scaled to Kts.  It should be a straight
forward
calibration, but it is not.  As I said, I gave up.  I just use the SOG
since
I'm on a lake.

Stan
"Our Little Amusement" #744

PS  Moving to Las Vegas tomorrow.  The boat will follow in Jan. or
Feb.
depending when I get a slip at Lake Mead. (4-5 month waiting list)


On 9/29/06, Irv Grunes <igrunes at comcast.net> wrote:
>
>
> Guys,
> Have gone crazy trying to understand the manual on calibration of
the
> knotmeter.
> Have not been able to decipher it.
>
> Can anyone describe is some detail the process so that the knotmeter
will
> read the same as SOG over still flat water.
>
> Ours has never read correctly.
>
> Irving Grunes
> Isle of Wight #851
>
>
>
>
>


-- 
Stan
C320 "Our Little Amusement" #744
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