The thermistor seems fine when measured with my multimeter, temp matched water according to the chart.
On Wed, Sep 23, 2020 at 6:25 PM ALAN BERGEN <trya...@alumni.usc.edu> wrote: > It's not uncommon for the thermistor to fail. That can affect the > temperature reading, but not the speed. Definitely pull the sensor. It may > be fouled, or a magnet in one of the vanes might have come loose. I don't > recommend painting the paddle wheel. Since the boat has been on the hard > for some time, you might want to replace the "O" rings surrounding the > sensor. > > Alan Bergen > 35 Mk III Thirsty > Rose City YC > Portland, OR > > > > On Wed, Sep 23, 2020 at 3:03 PM Jeffrey Brideau <bride...@gmail.com> > wrote: > >> We have the plug. I just don't know what condition the through-hull is in >> given we've never removed it and I doubt the previous owner had done it in >> the past decade as the boat had been sitting on the hard for the past 5 >> years prior to this summer. >> >> Does nobody think the temperature reading is abnormal? >> >> On Wed, Sep 23, 2020 at 11:40 AM Hoyt, Mike <mike.h...@impgroup.com> >> wrote: >> >>> Hi Jeff >>> >>> >>> >>> If you have the screw on plug for the transducer then you should pull >>> the transducer. Suprisingly little water comes in with the ST60 speed >>> transducer removed. Process is 1. Unscrew the retaining ring, 2. Pull out >>> the transducer, 3. Screw on the plug in place of the transducer. Takes >>> less than ten seconds and not a lot of water comes in. >>> >>> >>> >>> Transducers foul by this time of year and require cleaning. Likely the >>> boat has been in the water for a number of months and the water has been >>> warm. >>> >>> >>> >>> This is pretty normal. >>> >>> >>> >>> Mike Hoyt >>> >>> Persistence >>> >>> Halifax, Nova Scotia >>> >>> >>> >>> *From:* Jeffrey Brideau <bride...@gmail.com> >>> *Sent:* September 23, 2020 12:35 PM >>> *To:* Stus-List <cnc-list@cnc-list.com> >>> *Subject:* Stus-List Raymarine ST60+ Speed >>> >>> >>> >>> We've got an Autohelm package on the boat we purchased in August with >>> ST60+ instruments. The speed sensor reported 0KTS during survey. I cleaned >>> the paddle and it turned free during survey haulout and the instrument >>> worked fine for several weeks after that. Then, the speed returned to 0KTS >>> but the temperature read fine. I casually brushed the paddle while in the >>> water (not brave enough to pull it out while floating yet, want to try in >>> on the hard first. No idea when the last time this was done) and it was no >>> help. Last weekend the temperature suddenly doubled reporting about 135F >>> seawater. I lifted the instrument and measured resistance across what >>> appears to be a 10k thermistor and it correlated well to a 10k chart >>> suggesting water temp at the marina was near the expected value. >>> >>> >>> >>> Am I jumping the gun to assume the display has gone bad given the >>> temperature sensor seems like it is working or should I check something >>> else? >>> >>> >>> >>> Thanks, >>> Jeff >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> <https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!74tLadltXT4EGreF-Z7-r1iyiIZvLAuqg6qVgcInk2hbo5OrBS9XkEsOJ6BdTGnAxXE$> >>> >>> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- >> https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!74tLadltXT4EGreF-Z7-r1iyiIZvLAuqg6qVgcInk2hbo5OrBS9XkEsOJ6BdTGnAxXE$ >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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