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ContinuousWave: Small Boat Electrical
Dead or Malfunctioning SONAR Transducer
|Author||Topic: Dead or Malfunctioning SONAR Transducer|
posted 05-27-2009 11:41 AM ET (US)
How does a dead or damaged sonar transducer behave? One of mine is giving erroneous depths. I have swapped head units, restored to factory defaults, and checked for nicked cables. No luck.
I assume the when the crystal gets cracked, the head unit doesn't know good the difference, aside from short and open circuits.
posted 05-27-2009 06:56 PM ET (US)
You could try a hard boot. From there I'd contact customer service.
posted 05-27-2009 08:21 PM ET (US)
Try your control head with someone else's transducer. This should isolate the trouble to either the transducer or the control head.
posted 05-29-2009 02:57 PM ET (US)
Well after more testing and calls to customer technical support the transducer is identified as dead.
It is likely that it took a strike and cracked the crystal.
But here is the basic nature of the problems:
-the measured depth was always deep (both 50 & 200 kHz); both an offset (~10 ft) and scalar multiplier were observed.
-the 50 kHz frequency did not have any useful response
-the bottom (or whiteline) would not perform at all with 50 kHz.
-the remaining features (identifying suspended objects/fish) still worked fine, but marked at improper depths, and sometimes under represented
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