Marine Electronics Forum - raytheon depth finder help

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View Full Version : raytheon depth finder help

03-26-2012, 04:18 PM
can you turn on a depth finder with the boat on the hard.i want to see why i lost my speed sensor reading last year airmar b744 ducer replaced the insert still no speed raytheon 365 unit

Pez Vela
03-26-2012, 04:59 PM
When my boat was on the hard and I was working side-by-side with a Raymarine certified tech to set up some new sensors, he turned on the FF and I almost knocked him over trying to turn it off. I thought it was a bad idea to run a sonar transducer out of the water. He said, "That's an old wive's tale." Later, speaking by telephone with Raymarine tech support, I was told, "We do it all the time when we're bench testing customers' gear. We just point the transducer at the ceiling."

Based on those comments, I only run my FF in the water. Wive's tales die hard.

03-26-2012, 05:13 PM
When sonars are run out of water for extended periods of time the heat generated by the transducer might eventually damage the crystal element.
The cheaper the transducer the more prone to damage.
Short periods are fine.

If on the demo mode of course the sonar does fire.

03-26-2012, 05:54 PM
thanks for the imput sounds like a minute or to is no problem

03-27-2012, 02:25 PM
So with tranducer disconnected, shouldn't hurt anything for longer periods, correct??

03-27-2012, 03:29 PM
And 5 to 20 minutes plus on a quality transducer is fine.

But I have seen guys leave them on all day.
Not good there.

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