Check That The Towfish Is Receiving (Rub Test); Towfish Electronics Bottle - Klein 3000 Series Troubleshooting Manual

SYSTEM 3000 OPERATIONS AND MAINTENANCE MANUAL
4.23

CHECK THAT THE TOWFISH IS RECEIVING (Rub Test).

With the towfish running on deck. Start SonarPro. Open a viewing window for each
the high and low frequency. Set the range to 150 meters. Allow the TVG gain to
adjust. Rub the transducers firmly one transducer at a time. Your rub test should look
similar to the image below.
4.24

TOWFISH ELECTRONICS BOTTLE.

To remove the electronics from the towfish you must first remove the towfish nose
cone. This is done by unscrewing the socket head cap screw in the center with a
8mm hex key or driver. Once you have the nose cone off you will find the electronics
extraction handle. Unplug all cables at the feed-thru. Inspect this area for dirt and
debris, flush clean before opening. On the top and bottom of the handle is a 6mm hex
set screw; screw it into the handle to release the feed-thru. Using the handle, firmly
pull; the electronics module may pop out quickly. Avoid over stressing the transducer
leads. Carefully slide the electronics out of the housing, while keeping the electronics
assembly level.
To install the electronics into the pressure housing, inspect and clean the o-ring and
the corresponding surface in the pressure housing. If needed apply a light coat of
silicon grease to the o-ring and mating surface. Slide the electronics gently and
carefully into the pressure bottle; position the handle UP label to the top. Once seated
properly, screw out the 6mm set screws in the top and bottom of the handle to lock
the feed-thru in the pressure housing.
L-3 Klein Associates, Inc. TROUBLESHOOTING GUIDE
500 kHz
100 kHz
4-49