dmmbruce
Well-Known Member
Please can anyone tell me how I can test a through the hull echo sounder transducer. I have checked it is not plastered with anti-fouling. What else can one do please?
Testing a transducer
- Thread starter dmmbruce
- Start date
oldsaltoz
Well-Known Member
Listen for a clicking sound at the transducer.
Danny
Well-Known Member
The following assumes the boat's out of the water...
If you have a length of plastic waste pipe (maybe 2" dia and 2' long or so) try the following: cover one end with something like thin rubber sheet and place the other end over the transducer. You should get a depth reading about 4x the length of the pipe.
If you have a length of plastic waste pipe (maybe 2" dia and 2' long or so) try the following: cover one end with something like thin rubber sheet and place the other end over the transducer. You should get a depth reading about 4x the length of the pipe.
dmmbruce
Well-Known Member
Thank-you. I will try that as soon as I can get back down to the boat. 
)
)dmmbruce
Well-Known Member
Thank-you. Presumably it helps if the plastic pipe is straight. I will try it anyway, - thanks
impact30
Well-Known Member
Danny
Well Done! This piece of info is a pure gem!!!
Just tried it on two suspect transducers and results were identical although it was nearer to 3 times the depth.
I used a piece of 2" waste pipe with a rubber glove stretched across one end and secured with insulating tape.
PS. Its even more convenient as no water required and worked with pipe lying accross floor!!
Well Done! This piece of info is a pure gem!!!
Just tried it on two suspect transducers and results were identical although it was nearer to 3 times the depth.
I used a piece of 2" waste pipe with a rubber glove stretched across one end and secured with insulating tape.
PS. Its even more convenient as no water required and worked with pipe lying accross floor!!
Danny
Well-Known Member
Wish I could claim to have invented the idea. I saw a similar test rig when I visited Nasa's service department a few years ago. The greater depth indicated should reflect the difference in the speed of sound in air and in seawater. IMS it's around 4x faster in water.