Author Topic: 83KHz didn't work  (Read 4762 times)

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Offline feeko

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83KHz didn't work
« on: July 08, 2013, 03:20:55 AM »
Hi,
Do I apologize for my weak English (my native language is Polish).

Yesterday my 997c worked correctly to some moment.
After a few hours the readings came very weak.
Unit doesn't show the structure of the bottom (2D).
I checked parameters and I know that 83KHz beam didn't work. In dual view (83/200) 83KHz looks like very shallow water (200KHz shows correctly depth but details of bottom are poor)
I checked transducer and looks ok.

200KHz, SI, DI - looks like worked correctly.

Could anyone help, where I should look for causes?
Unit?
Transducer?
Cables?


Offline ITGEEK

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Re: 83KHz didn't work
« Reply #1 on: July 08, 2013, 10:40:45 AM »
Quote
After a few hours the readings came very weak.
Power supply problem:
Charge up and load test your battery.

Offline feeko

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Re: 83KHz didn't work
« Reply #2 on: July 08, 2013, 10:55:06 AM »
battery is charged by engine
unit i connected to big battery

Offline ITGEEK

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Re: 83KHz didn't work
« Reply #3 on: July 08, 2013, 12:34:34 PM »
It doesn't mean the battery is any good.
You need to have it load tested.

Offline feeko

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Re: 83KHz didn't work
« Reply #4 on: July 08, 2013, 03:37:58 PM »
Battery is good, 12,2V (about 14V when engine working).

Several hours ago I made the test with dualbeam transducer and 83KHz worked correctly.

Offline ITGEEK

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Re: 83KHz didn't work
« Reply #5 on: July 09, 2013, 08:19:08 AM »
feeko:
Having enough voltage is only half of it.
The battery must have staying power.
If the battery is bad, it will drop below 10.5 volts when
there is a load/draw placed upon it.
That's what a load test does.
I had a battery once that charged up to 12.5 volts.
Then when I turned the sonar on, the voltage dropped
so bad, that it would not power the sonar.
The battery wasn't that old either.

Offline Humminbird_Greg

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Re: 83KHz didn't work
« Reply #6 on: July 09, 2013, 02:20:58 PM »
Battery is good, 12,2V (about 14V when engine working).

Several hours ago I made the test with dualbeam transducer and 83KHz worked correctly.


Sounds like the 2D in your 997's HDSi transducer is going bad.
Replace your HDSi transducer: XHS-9-HDSi-180-T if it is a transom mounted version.
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com


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