Author Topic: 798ci si losing bottom reading (Read 16906 times)

nicko_cairns · « **on:** January 18, 2013, 10:35:13 PM »

Hi guys,

I've been running a 798ci si for about three years and it's great. The other day though in 25-25m of water it started reading 1-8m and on occasion 0m, bit scary! Happened a few times for a couple of minutes each time.

I was trolling/sounding so couldn't power off the unit to cool it (in case that was the issue) for very long, so turned the unit off for 30 seconds then back on.. after a minute or so after being turned back on it started working properly.

Any ideas on what the problem might be? This could be a real safety issue when navigating some of the costal creeks up here which are full of sandbanks/mudbanks so an accurate reading is paramount.

Thanks, Nick.

flatcat_auz · « **Reply #1 on:** January 20, 2013, 07:57:49 AM »

Same model same issue. Same resolve, power down power up. Also had glitches in the recording module the other day but has not reoccurred touch wood. Seems to be software issue/s.

nicko_cairns · « **Reply #2 on:** January 20, 2013, 07:00:10 PM »

Ok thanks mate,

I've updated to the latest software to see if this helps, hope so!

Nick.

flatcat_auz · « **Reply #3 on:** January 21, 2013, 01:37:34 AM »

Quote from: nicko_cairns on January 20, 2013, 07:00:10 PM

Ok thanks mate,

I've updated to the latest software to see if this helps, hope so!

Nick.

Let me know how u go as I am not yet convinced that the upgrade is for 360 only with nothing else to offer plebs like me. I have yet to upgrade and appears that those who have experienced problems.Given 360 is retailing $2000 US can't wait to see Australian prices.....

Now when I refer to 'my' issues what I failed to add is that since purchase (Same time Sydney Boat Thingy was on @ Darling Harbour- last year.) it has done over 300hrs

So it's not that much of an issue.[/size]

nicko_cairns · « **Reply #4 on:** January 21, 2013, 03:50:02 AM »

interesting as i'd never had the issue before and didn't upgrade then get the issue, i've upgraded the software to try and stop the issue occuring again.

will post the results once this cyclone f*cks off (hurricane for some of you chaps), forming east of North Queensland, the last two have really smashed my area. winds about to average 30kts+ for a while..

Humminbird_Greg · « **Reply #5 on:** January 22, 2013, 03:32:05 PM »

If it was software related and you had not updated the software before, you would think that you would have seen this issue before; unless there was some different water condition that you have not been in before, could that be possible?

Next time this happens try adjusting the Surface Clutter menu to filter out more and/or try the Salt (deep) setting for the Water Type menu.

nicko_cairns · « **Reply #6 on:** January 22, 2013, 05:02:03 PM »

Thanks Greg.

Yes you're right but I don't want that happening again so was willing to try anything...

Saltwater Deep even though I'm in only up to 30m or so of water? (90')

I have the clutter right down as I don't like that setting.

Thanks,

Nick.

Humminbird_Greg · « **Reply #7 on:** January 23, 2013, 01:44:19 PM »

Yes, the Salt (deep) menu setting changes some of the surface and near surface clutter filtering that the unit does. Since there is usually more surface clutter in salt water the filtering for it has to be more aggressive in deeper salt water or else the unit may mistake some of this clutter as the lake/ocean bottom and show an incorrect water depth reading.

nicko_cairns · « **Reply #8 on:** January 23, 2013, 07:22:20 PM »

So 30m and I should run the deep setting? Will do Greg thanks.

flatcat_auz · « **Reply #9 on:** January 24, 2013, 03:40:08 AM »

Quote from: Humminbird_Greg on January 23, 2013, 01:44:19 PM

Yes, the Salt (deep) menu setting changes some of the surface and near surface clutter filtering that the unit does. Since there is usually more surface clutter in salt water the filtering for it has to be more aggressive in deeper salt water or else the unit may mistake some of this clutter as the lake/ocean bottom and show an incorrect water depth reading.

So what about in 8mtr Salt with silt,weed,sediment stirred up by wind. I have surface clutter @1 or 2. And I too have suffered these problems but only possibly 3-4 times but as stated the unit would be closing on 500hrs in 3mths or so

and in these instances turning unit off and pausing for 10secs and restarting normally resolve the issue. Recently had drama's with recording but on next outing no issue. If happens again thinking of resetting factory defaults and going from there.

Again as stated I see no benefit in this upgrade as at this stage will not be getting 360 or ipilot. Planning offshore work soon so see how I go, only 45mins from Nelson Bay and talk of this year bettering last years Marlin. Could be fun in a 4.5mt given Black Marlin have been sighted 500mts offshore @ South West Rocks.

ITGEEK · « **Reply #10 on:** January 24, 2013, 07:36:40 AM »

flat_catz:
Humminbird will state some of the changes/additions in a new update.
But, I think if an old software version had a problem,
that Humminbird may fix it without ever mentioning it.
It's hard for anybody to admit to mistakes.

So, we never truly know absolutely everything there is in a new update.
Best thing to do when a new update comes out, is wait a month or two and
see if other people have problems with it. If you can't find any problems, then it may
be safe to update.

Humminbird_Greg · « **Reply #11 on:** January 24, 2013, 10:38:24 AM »

The salt (deep) setting could help. No harm in trying it. If it does not help or makes it worse you can always set it back.

Yes, sometimes there are changes made in the software that we are not informed about.

flatcat_auz · « **Reply #12 on:** January 25, 2013, 08:22:19 PM »

A big thanks to both of your responses guys. Had a 'play' last night and did notice that alot of the clutter did indeed disappear. Unfortunately couldn't get much deeper then 10mtr due to a 45km (22knt) Easterly. Will keep you posted.

Are u dry yet up in Cairns? Weather is moving south and closer my way as I type

nicko_cairns · « **Reply #13 on:** February 14, 2013, 12:40:53 AM »

yes mate we've had hardly any wetseason at all, looks like the late wet will hit around 25 March.

cheers.

nicko_cairns · « **Reply #14 on:** March 03, 2013, 06:16:16 AM »

Hi Greg (or anyone),

I changed to the saltwater deep setting and had no issues with losing the bottom, however my sideimaging was terrible, maybe it was the last upgrade but I couldn't see a big wreck on sideimaging that came up on the normal sounder picture, it was really frustrating. Depth was only 14m so about 42' and I had the chart speed set to the boat speed etc..

Later I was about the same depth, could see some large rocks but the image quality was again really poor despite having the right settings. help please! Thanks.

Quote from: Humminbird_Greg on January 23, 2013, 01:44:19 PM

Yes, the Salt (deep) menu setting changes some of the surface and near surface clutter filtering that the unit does. Since there is usually more surface clutter in salt water the filtering for it has to be more aggressive in deeper salt water or else the unit may mistake some of this clutter as the lake/ocean bottom and show an incorrect water depth reading.

flatcat_auz · « **Reply #15 on:** March 03, 2013, 08:01:12 PM »

I upgraded yesterday and and I reckon that the chart speed is faster. I am aware that this has been 'fixed' I personally find that after using chard speed 3 now down to 2 (@ 4knts).

I'm still getting average SS images with interference on the left. Going to re-adjust (lower) but don't hold out much hope as been through this before.

Net step will be contacting BLA.

nicko_cairns · « **Reply #16 on:** March 04, 2013, 06:01:59 AM »

ok thanks mate, i'll go out for another play and will try the deep vs shallow setting, clutter settings and speed.. should surely have a win then?!?! frustrating when you're over a big wreck area and can't see it on SI!

Quote from: flatcat_auz on March 03, 2013, 08:01:12 PM

I upgraded yesterday and and I reckon that the chart speed is faster. I am aware that this has been 'fixed' I personally find that after using chard speed 3 now down to 2 (@ 4knts).

I'm still getting average SS images with interference on the left. Going to re-adjust (lower) but don't hold out much hope as been through this before.

Net step will be contacting BLA.

flatcat_auz · « **Reply #17 on:** March 04, 2013, 07:28:11 PM »

Posted some pics (about 3mths old) with the settings. I find that I run Sens and contrast in btw 10-12. SS set at 10-15mtrs.
See they are releasing 360 in Australia early march, $2799. 798 screen is way to small to get a decent image to justify that sort of $$$ outlay.

http://forums.sideimagingsoft.com/index.php?action=profile;area=pictures;u=9210

nicko_cairns · « **Reply #18 on:** March 04, 2013, 08:24:35 PM »

thanks mate, yeah i've watched all the humminbird vids on youtube and thought i had the settings just about perfect for my troll speed, so this was strange.. really strange but will try again. maybe it needed another poweroff/on

yep wayyy too expensive even if i had a bigger screen, even when i replace this unit i'll only go SI again unless the price drops a lot!

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