Autohelm ST50 Tridata

[caped...@gmail.com]

All of a sudden our Autohelm display decided to show all zeros instead of the speed and depth.  Since that information comes from two different transducers I imagine that the problem is with the ST50 itself or with the wiring, it is getting power so I am looking for ideas, has anyone experienced this?  Raymarine says that they cannot help because the ST50 predates there legacy support, they have no information on it.

Tim in STL

White O'morn NS26U #216

Harbor Point Yacht Club

West Alton, MO 

[Joe Valinoti]

The most common problem on a boat, Tim, is a bad connection.  I’d try that first.  Another suggestion is to look on eBay for another economically priced ST-50 and swap it out.

 

Joe Valinoti
S/V IL Gatto NS30U #221
Sea Harbour YC
Oriental, NC USA

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[caped...@gmail.com]

That is next on my agenda.  I'll unplug each connection, one at a time, and see what happens.  Next step will be to unplug everything and try each transducer one at a time. If all of that fails, I think a Dragonfly 5 Pro from Raymarine might be in my future.

Tim in STL

White O'morn NS26U #216

Harbor Point Yacht Club

West Alton, MO

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[Mark Powers]

Tim,
Sometimes problems occur when there is too much voltage drop. My instruments and gps worked fine. I added a bigger gps and found the screen would go blank periodically. Everything checked out fine however the problem persisted until I went to a larger power supply wire for the helm station. With the larger wire and less voltage drop the problem has gone away.

Mark Powers
La Reina 26C
Vancouver, B.C.

[Tim in STL]

The plot thickens . . . we were out sailing today and we motored for the first 45 minutes or so.  The depth gauge and and the knotmeter were both on at the beginning, but soon went blank.  We flipped the Instrument switch on the panel off and then back on, both instruments returned to working.  Ten minutes later both instruments went blank.  We again flipped the switch off and then back on with the same results.  This went on the entire time that we motored.  When we shut down the engine both gauges worked for the rest of the day.  Any idea as to what might be going on??  I am stumped.

[Dakinh]

Is this intermittent operation occurring to any other item controlled by the distribution panel?

If so, it may be in the positive supply from the battery switch to the panel or the ground.

Ken Dakin

NS 33 #7

Sashay

Burlington On

Sent from my iPad

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[Tom Schoenhofer]

The instrument switch in the panel is a breaker. Next time this happens carefully look at the switch and see if it has tripped. Turning it off and on resets it. There may be an intermittent short somewhere that is triggered with the engine vibration.

If it is an intermittent voltage drop it may be enough to turn off the instruments but I don't know why they wouldn't just come on again when the voltage came back up.

My Garmin GPS has a low voltage alarm built in. You have to go in the setup and turn it on and then set the alarm to beep at any voltage point you want. It warns you before the battery gets too low. There is no high voltage alarm. It alerts you to intermittent low voltage in your system, for example when the battery is low it beeps when someone runs the water pump.

BTW The Garmin also has a configurable display and you can add the supply voltage to all the other numbers so you can easily see it when you are at the wheel. I'm almost sure you can do this with any GPS system.

My engine panel is in the lazarette and this meter is an old analogue one and very hard to read accurately.  

Maybe this will help.

Tom

26C #28 North Star

Penetang

[Tim in STL]

The mystery continues . . . Out sailing yesterday, we motored for 20 minutes and the instrument shut off three times, we then sailed for six hours and the instruments never faulted during the sail. What is going on and where do I start?

Tim in STL

White O'morn NS26U #216

Harbor Point Yacht Club

West Alton, MO 

[Joe Valinoti]

I think that you have to wiggle every wire in that system with it turned on and someone watching the display closely.

Joe Valinoti
S/V IL Gatto NS30U #221
Sea Harbour YC
Oriental, NC USA

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From: Tim in STL

Sent: Friday, August 24, 2018 9:57 AM

To: INA Nonsuch Discussion Group

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