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-   -   Auto helm St 50 plus (http://www.sailnet.com/forums/electronics/81875-auto-helm-st-50-plus.html)

Brolgasail 12-18-2011 07:33 AM

Auto helm St 50 plus
 
Hi all
The wind direction vane on St 50 was corroded and so we took it off and lubricated the pin until it turned easily. On reconnecting the digital display just had 2 dashes and no speed was showing. Does this mean it is broken or needs recalibration or a poor connection?

Interested in your thoughts.

Brolgasail

szigi 12-20-2011 05:21 AM

Probably a bad connection. It was discussed in an other thread somtimes ago, here is my reply ( I have actually tried this, and it works):

There is a simple test to check the operation of the masthead unit, you only need a voltmeter for that. It is described on Raymarine's site: https://raymarine.custhelp.com/app/a...ead-transducer

(You might not get the described results with the speed signal, az it is infact a square wave signal, the faster the wind blows, that higher its frequency. Depending on the meter you use, you might get alternating values or the described voltages.)

If you do not get these values, suspect the transducer or the cabling.


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