Thanks Fred I will try that. Seems to me the package did not come with any detailed manuals. Just installation guides. Will look online.
For calibration I just set the subtract or add factor as I always used to on the ST60. Nice to know there are other methods. Mike From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Frederick G Street via CnC-List Sent: Tuesday, August 25, 2015 4:48 PM To: cnc-list@cnc-list.com Cc: Frederick G Street Subject: Re: Stus-List i50/i60 question for Fred Mike - have you run the "Intermediate Calibration" routine detailed on page 34 of the manual? This allows you to do two speed runs, and set up a calibration factor that is applied to the calculated speed. If you're showing a little fast at four knots, and faster at six knots, this may help get things down where they belong. Fred Street -- Minneapolis S/V Oceanis (1979 C&C Landfall 38) -- Bayfield, WI On Aug 25, 2015, at 12:28 PM, Hoyt, Mike via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote: I have new i50 speed and depth and i60 wind installed Mid July 2014. Boat is a Frers designed Carrol Marine built Frers 33. Phrf here is 114. Typically in the Fall the ST60 speedo we had on our last boat would be reading slow and I would have to calibrate faster. At Spring launch would be reading fast and I would calibrate slower. This was always because of growth and slime. This Spring the i50 speed read optimistically high. I left it that way for a while since it feels pretty good to see higher numbers even if you know they are not correct. Eventually I calibrated ½ knot slower based on comparisons with Chartplotter GPS speed in neutral tide situations. Since that time I have noted that once again it is reading higher than GPS and now the boat is in fresher water (Bras d'Ors Lakes) by about 3/10 to 4/10 of a knot. I notice that it is further off at speeds 6 knots and above and somewhat close to GPS at 4 knots. This is not usually too much of a problem since the speedo is for relative speed anyway but surprises me that it is close at 4 knots but off by a larger amount over 6. The bigger issue is that the TWS on the wind instrument would also be affected as would my perception of currents Any comments on this? Are there varying methods of calibrations? It does seem nice to be making 6.7 knots to windward but a quick look on my chartplotter brings me back to reality ... typically we are 6.2 or so when the boat is going well upwind. Mike Persistence 1987 Frers 33 Currently sitting in Dundee on the Bras d'Ors Lakes
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