I have a Young 20 flats boat, mostly in shallow water flats 2-30 feet deep.
My depth reading is saying 6.5′ in about 1.5′ of water.
I tested again on the trailer and 1.5′ from transducer to ground reading 6.5′.
I cleaned the transducer and no change.
Anyone know how to adjust or reset?
Do I need to mail unit to Lowrance?
I appreciate any info.
mine reads 6.7 feet sitting in the garage
transducer is 19″ from cement
I still have readings that I think are pretty close in the water.
Do you have your HDS 9 set on shallow water?
I do not believe there is a way to calibrate it.
My voltage also reads off by one plus volts less than my multi-tester
My voltage also reads off by one plus volts less than my multi-tester
Mine does too. Do you know if there is any solution for this?
Out of the water the duecer should read deeper, I think by about 3x if I recall. Is it sitting ‘level’ with the world when the boat is in its normal resting state on the water, if its angled amd not level that could cause it to read deeper, would take a pretty severe angle to be off 5 feet though so doubtful that is it.
On the voltage, I had that (2-3 volt drop) when I first installed my new units using one of the leads out of the fuse panel of the boat. I then direct wired the units back to the battery with a 10 ga. feeder and a separate fuse block just for the three units and network box and now I can turn everything electronic on in the boat and loose about .2 volts reading on the graph.
Thanks, I’ll have to make sine upgrades. I’ll be relying on that voltage reading to make sure my starting battery doesn’t die from my downriggers.
In the menu there is a section called “Sonar Installation”. Perhaps you have something messed up with the “keel offset”. I agree though, what you read out of the water should be of no concern, but the readings in the water sound messed up.
If there is any value other than “0” in that field, you are going to get a different reading that what is from the transducer to the bottom. If you have a positive number in that field (depth below surface), it would subtract whatever number is in that field to the actual depth. Negative number it would add (depth below keel).
reading this I thought of something else !!!!
You got the right transducer picked?
update on voltage on my HDS
I tested the power cord and get 12.7
Plug it in and it shows 11.0
not very close —— go figure.
What does your battery read when the HDS unit is on? Put meter on the battery itself. There will be a draw on the battery so I would expect you to get a lower reading once the unit is turned on. Not 1.7 volts, but it should drop.
I have two HDS units running off the same battery. One is direct wired to the battery while the other is through the switch panel. I get different voltage readings on both when in use at the same time.
finally took time to check battery with HDS 9 turned on.
nine reads 10.7 – the meter at the battery with unit on is 12.7
Should not be!!! No way I have that much loss in my wiring job
Take the reading where the HDS9 plugs into the fuse block with the power on, vs at the battery. That will tell you the real voltage drop.
I had the same issue. Lost a volt or more between the battery and the fuse block when running two HDS units plus an LSS-1 and a NMEA network. The solution was to wire in a second fuse block with its own leads to the battery and split the load between the two.
On July 18 you posted:
“update on voltage on my HDS
I tested the power cord and get 12.7
Plug it in and it shows 11.0”
On August 11 you posted:
“finally took time to check battery with HDS 9 turned on.
nine reads 10.7 – the meter at the battery with unit on is 12.7
Should not be!!! No way I have that much loss in my wiring job”
The loss you are seeing is a combination of the power consumption of the HDS 9 and power loss from the wiring between the battery and the HDS 9. The multimeter voltage reading at the power plug is with no power draw. The voltage reading at the HDS 9 screen factors in the power draw of the HDS 9.
The fix: Beef up the wiring from the battery to the HDS 9 and your troubles might go away. 10-gauge, fused as close to the battery as practical with a spade-type fuse, not a junk glass fuse. Shorten up the factory wiring (probably 16-gauge or less) from the HDS7 plug to a foot at the most.
Good luck.
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