Checking a Transducer?

[Little Rascal]

I'm trying to get my secondhand Nasa Stingray to work with the transducer that came with the boat. I'm not sure what transducer it is?

The Sounder 'works' with 12v power, the arm swings and the LEDs light and the depth alarms work.

But the boat is out of the water: is there any way to check if the transducer works? It has no noticeable effect when connected but then it had no oil in the tube and the boat is on the trailer anyway. The co-ax plug is a bit rough too...

 

[Danny]

Try the method described here.

 

[nigelmercier]

Try the method described here.

That's interesting, thanks for sharing.

Is the OP trying to connect two parts from different manufacturers? Surely this is doomed to failure.

 

[Little Rascal]

Cool, thanks, I'll try that.

Is the OP trying to connect two parts from different manufacturers? Surely this is doomed to failure.

I don't know who the manufacturer of the is, I was hoping someone might be able to identify it from the pic. But considering the age and type of boat (small trailer sailer) I wouldn't be suprised if it's NASA, although it could be Seafarer... Certainly likely to be 150mhz.

 

[VicS]

It certainly looks like the Seafarer one I have here beside me. So should work with a Nasa Stingray.

The connector looks pretty corroded, as you say, so clean that up ! (Or replace it)

 

[Little Rascal]

Well it seems to work! Thanks for the tip

 

[Hadenough]

Just tried it myself before lift in and bingo it works! Interestingly I first used a latex glove and it didn't work, I changed it to a rubber glove which was also thicker and it worked. Pretty much 4x the length of the tube too. Thanks again to whoever first posted the trick.

 

[sailorman]

Well it seems to work! Thanks for the tip

a metal pan works as well but i cant remember the formulae, something like hold 300 m/m away & the reading is something like 1200m/m

 

[NB Willawaw]

You can normally check them electrically by measuring resistance as well.
This is how I normally test them on ships.

Also, you can sometimes feel the vibrations on the surface on the low power cheap ones.