[C320-list] Calibrating/Aligning Raymarine ST50 Windvane

[Allan S Field]

Dan Gerhardt
35 Michael Way
Durango, CO 81301
C250 at mydurango.net

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Elizabeth Schwartz
Sent: Friday, August 3, 2018 8:18 AM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Calibrating/Aligning Raymarine ST50 Windvane

Ahoy.....would you please send Dan Gerhard contact info?.....I have issues with mine also, and plan rebuild this
winter.....Thanks....Joe...#245


On Thu, Jul 26, 2018 at 05:22 PM, Dave Hupe wrote:

> I recently had my masthead wind instruments unit rebuilt (by Dan 
> Gerhardt in Durango, CO), mainly because my wind anemometer cups did 
> not spin at all last year when I bought the boat.  I elected to also 
> have the wind direction part rebuilt while the unit was off the boat.
>  
> I just reinstalled the masthead unit.  The anemometer cups stop in 
> light wind and/or are not spinning as freely/fast as I think they 
> should (especially comparing them to the same setup on the 320 in the 
> slip next to mine).  I'm hoping the cups will spin more freely after 
> they have a chance to continue to spin in the wind (new bearings 
> loosen up?) .
> The wind direction part is working (it did before, but hung up 
> occasionally), but now my wind instrument panel shows the wind is 
> about 180 degrees off (when the wind is blowing at the bow, the 
> indicator suggests it is instead blowing toward the stern).
> I looked a my manual and it says for calibration to first "linearise" 
> the direction transducer by powering up the unit and driving the boat 
> in 2 complete circles. Then it talks about pushing down the left-hand 
> instrument panel CAL button for 2 seconds until "CO" is displayed, 
> then pushing the rocker button (is this the right button?) as many 
> times as needed to move the pointer to the correct wind angle.
> I understand steering the boat in circles, but the second part of the 
> procedure confuses me (when and what is the correct wind angle?).  The 
> only way this seems straightforward to me is to physically have 
> someone on the mast hold the windvane still as if it were blowing 
> directly at the bow, then push the CAL button to appropriately correct 
> the pointer.  However, this doesn't seem like what the manual 
> directions indicate you need to do.
> Has anyone been through this with old instruments on an early (1994,
> etc.) 320?  Can you explain this better for me?
> Dave Hupe
> 1994 Cat 320 "Mayan Sun" (#32)
> Holland, MI
>