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Here is a picture my friend Vic is having with his new 998. No matter what he has tried he cannot get rid of the "extra" line on the left hand side of his display in the water column. He has raised and lowered his transducer, raised his big motor, removed his other fish finder transducer, ran direct power line to a separate battery and more. Any ideas? All help appreciated.
Thanks,
(Answered in the other thread)
It looks like the left side of the SI beam is being partially blocked by something to the left of the Xducer...
Either a drain screen, another Xducer, a jack plate, ladder...etc
Post pics of the back of the boat (from the rear and from both sides)...
Rickie
good news here.............. sure looks like its only something blocking the left side view. unmount it from the boat and tape it to a broom handle and stick it down in the water deeper to verify . good luck and report back the results:biggrin
:Rofloops........ i was talking about the transducer not the unit head. it is water proof but i wouldnt stick it under the water just to be safe:Rofl
It does not look like the transducer is setting level. It looks as though it is too low at the back. The transducer should be level when sitting on the water.
heck yers. tape it to a broom handle and stick it down in the water deeper to verify .
You should call the vendor, and take the advice they give. I'm sure they won't mention broom handles. LOL
I'm guessing the left SI beam is hitting the Xducer on the other side of the transom...
Like the other guys said....temporarily mount the HDSI Xducer to a broom handle and stick it farther down into the water to verify....
It's important to remember that the SI beam comes out of the sides of the HDSI Xducer at 90° ..
Also it's important to remember that sonar beams do not stop at the advertised beam angles...the sonar pulse kinda "feathers out" even farther than the beam angle as the beam progresses...
So while the "advertised" beam angle may say ~90° out each side... There are still echos that can be picked up at 91°, 92°, 93°,...etc (depending on how big the target is and how close it is)...(your other Xducer just could be "big enough" and "close enough" for example)...
Sonar is a sound pulse with ever-decreasing strength...not a laser with definitive beam edges ...
Rickie
Rickie, the TD on the left has been removed & Vic has tried the moving of the 998 TD to several different locations with the same results.Quote:
Originally Posted by rnvinc
Was the 2d Xducer mounting plate removed also or just the puck...??Quote:
Originally Posted by Don G
The broom handle trick will tell us for sure if the problem is blockage or some other issue...
The image with the line that close to the center line and only on one side "generally" indicates blockage of some sort...
Rickie
Another test can be looking at the DI view on the "Wide" setting...
Blockage "sometimes" will show up as even spaced lines down thru the DI view water column as the pings "bounce" off of an obstruction...
Rickie
I am wondering if the image is from some turbulance of some kind instead of a blockage. Most of us get a little fuzz on the motor side of the image just from the motor passing thru the water even if it is off and the TM is pulling the boat. But I haven't seen turbulance this bad. Plus you said the motor was raised. Just a thought. I think the broom handle idea will tell you a lot tho if you try it, at least you will know nothing is in the way while you try that.
The more I look at the image the more I think turbulance because of the rough bottom(deeper) edge of the fuzz. Looks just like the fuzz something stirring the water up makes but on a much more severe scale. But at 1.4mph I sure wouldn't expect this much turbulance. Very interesting problem.
Thank you to all who has given trouble shooting issues to check. I have removed the 2nd transducer all together even the mounting bracket. I have tested the transducer on a piece of 1" x 1" x 3' long. I placed it in several different areas side to side, deeper range and shallower , I ever put the transducer along side the boat and it still showed the line. I also tried it with the motor shut down and the boat not moving at all so I was sure there would be no turbulence, same thing. I took a separate battery and ran the power cable to it all by it self and still had the line. I'm out of ideas and have tried all and anything suggested with no luck. I am now waiting for Humminbird to get back to me, they say they have sent the pictures and problem to their engineering dept. I'm sure I wont hear anything until after the holidays. Yesterday I took my boat to Green tops sporting goods where I bought the unit. The electronics guy told me that there was nothing wrong with the unit as he showed me 3 Humminbirds on display whit the same line while they ran on demo. I don't know what to believe at this point. Again thanks to all and if anyone has any further ideas please let me know.
Anchor man, Vic
If you know someone with a SI unit...(any size as long as its a HB SI)...
Try your head unit on their xducer...
Try their head unit on your xducer...
Either of the above 2 tests should give definitive info of if the problem is your head unit or your xducer...
Rickie
Vic,
The simulator data that the electronics guy showed you was taken from a boat that did have some Left Si sonar blockage. So it will look that way on all Si units that it is played back on (it is effect, a Sonar Recording that you are viewing while in the Simulator mode).
Don’t wait on the Engineers to come back from the their holiday vacations. Go ahead and temporarily install your HDSi transducer on something (a broom handle) and hold it completely under the boat’s hull and motor (with the boat drifting) as this will quickly show whether the problem is in the transducer or in the mounting of the transducer. Turning the transducer around backwards will also help identify the root cause of the problem.
- If the repeating lines go away from the left side than it is a physical blockage of the Left Si sonar and we will have to work on this.
- If they do not go away than the problem is either in your transducer or the unit itself. At that point you should test another Humminbird Si unit (any model as Rickie said) on your boat or your unit on another boat. This will let you know whether the problem is the transducer or your 998c Si unit.
If the problem is in the transducer; call the Humminbird Customer Resource folks, tell them what is going on and what you have done to troubleshoot the problem and ask them to ship you out a new HDSi transducer (XHS-9-HDSi-180-T).
BTW: you did register your unit with the Humminbird Select program, didn’t you?
Humminbird Select | Model Registration
Thanks Rickie, you mean a 797 or 798 transducer cable will fit my 998?Quote:
Originally Posted by rnvinc
Answered in PmQuote:
Originally Posted by Anchor Man
Rickie
Yes it will Vic, but the 800kHz Si sonar will not work well at all.Quote:
Originally Posted by Anchor Man
I just got off the phone Ernest about testing his 797c2 Si NVB unit on your boat. Just be sure to connect only the power and transducer – NOT the GPS Receiver!
Your 998 can be tested on his power cable, transducer and (if need be) GPS Receiver.