Coil touches wet sand n signal appear

[kentkoh]

Hi guys.. Tonite is my 1st time md at beach.. It was fun..

But i was only able to md at dry sand area. My ace 250 keep showing signal when my coil touches on the wet sand. But it work perfectly on dry sand.

Is this normal on ace 250?

Using:
All metal mode.
Sensitivity : 2 bar from max
Coil : 9x12 without coil cover.

[PKD]

Yes, its normal. The 250 is a VERY sensitive machine. Mine falsed like that in water as well when the coil was submersed. At high sensitivity it will false a lot as well, but if you keep it at factory settings, then you'll just learn to ignore those falsings.

[Burbank Bob]

Using Ace250 at the waterline or wetsand or saltwater will leave you digging for many non existent targets. Stick to the dry - you can find plenty.

[Jason in Enid]

The ace wasn't meant for saltwater.

[dewcon]

Its a single freq VLF machine.... some will somewhat detect the salt if you GB there, but the depth isnt good. PI or multi freq are best for their ability to cancel mineralizatrion.

Dew

[Burbank Bob]

Originally Posted by dewcon

Isome will somewhat detect the salt if you GB there, but the depth isnt good.

Dew

ACE 250 has no way to manual ground balance.

[zeemang]

I used my ace 250 at the beach alot... You'll have to back the sens down and make sure you hunt either wet or dry sand. If you pass the coil over the invisible line between wet and dry it'll false almost every time... Stick with either wet or dry, swing slow and don't bump the coil on the wet sand...
HH!

[goodmore]

Salt water is conductive. Multi frequency machines deal with salt water sand the best. That is if you want a detector with discrimination. If not a PI detector works very well.

[MetalMiner]

Yeah that's normal. I had the same problem with my F2. couldn't do the Wet Sand false signals galore. I solved that problem I ordered a new Minelab Safari.

[Terry Soloman]

Originally Posted by kentkoh

Hi guys.. Tonite is my 1st time md at beach.. It was fun..

But i was only able to md at dry sand area. My ace 250 keep showing signal when my coil touches on the wet sand. But it work perfectly on dry sand.

Is this normal on ace 250?

Using:
All metal mode.
Sensitivity : 2 bar from max
Coil : 9x12 without coil cover.

"VLF" or very low frequency type metal detectors like the Ace 250, work extremely well on dry sand and in fresh water. They do not work as well in saltwater, or on wet ocean-water beaches. In highly conductive saltwater conditions pulse induction (PI), or multi-frequency (BBS/FBS) metal detectors excel.

The VLF metal detector sends 6,000 - 80,000 radio waves per-second into the ground. When the radio waves hit something conductive - like an iron nail, gold ring, coin or aluminum pulltab, a magnetic field sets up around the object and a particular signal frequency is transmitted back to the detector's receiving coil.

VLF metal detectors have the ability to "discriminate," or tell what type of metal they are seeing by "reading" the return signal frequency. An iron nail for example, has a different frequency than a silver coin. The processor in the metal detector knows the difference between the two, and can be set to remain silent when seeing the nail. However, the radio waves bounce off everything that is conductive in the sand or water.

This is why VLF detectors must be "ground balanced" to work effectively in highly mineralized soil, or on highly conductive saltwater beaches. You must tune or adjust the machine to see through the "fog," or white-noise created by the salt and iron in the sand or water you are detecting. Unfortunately, this usually leads to a loss of depth and stability.

Back your sensitivity down to two-three bars, and you should see an improvement in the falsing. Hope this helps!

[Dirtfishin]

Nice Terry, you explained that very well. Thank's

[Jason in Enid]

Great Explanation Terry!

[kentkoh]

Originally Posted by Terry Soloman

"VLF" or very low frequency type metal detectors like the Ace 250, work extremely well on dry sand and in fresh water. They do not work as well in saltwater, or on wet ocean-water beaches. In highly conductive saltwater conditions pulse induction (PI), or multi-frequency (BBS/FBS) metal detectors excel.

The VLF metal detector sends 6,000 - 80,000 radio waves per-second into the ground. When the radio waves hit something conductive - like an iron nail, gold ring, coin or aluminum pulltab, a magnetic field sets up around the object and a particular signal frequency is transmitted back to the detector's receiving coil.

VLF metal detectors have the ability to "discriminate," or tell what type of metal they are seeing by "reading" the return signal frequency. An iron nail for example, has a different frequency than a silver coin. The processor in the metal detector knows the difference between the two, and can be set to remain silent when seeing the nail. However, the radio waves bounce off everything that is conductive in the sand or water.

This is why VLF detectors must be "ground balanced" to work effectively in highly mineralized soil, or on highly conductive saltwater beaches. You must tune or adjust the machine to see through the "fog," or white-noise created by the salt and iron in the sand or water you are detecting. Unfortunately, this usually leads to a loss of depth and stability.

Back your sensitivity down to two-three bars, and you should see an improvement in the falsing. Hope this helps!

Thanks for your great explain.

Do u think a coil cover will help?

[Terry Soloman]

Originally Posted by kentkoh

Thanks for your great explain.

Do u think a coil cover will help?

No, it will only protect your coil from scratching and chipping. It has no effect other than that.

[Hotrod Tom]

Originally Posted by kentkoh

Hi guys.. Tonite is my 1st time md at beach.. It was fun..

But i was only able to md at dry sand area. My ace 250 keep showing signal when my coil touches on the wet sand. But it work perfectly on dry sand.

Is this normal on ace 250?

Turn down the sensitivity and swing the coil just above the sand. It is normal for it to false when you hit the wet sand. Search the wet sand and after you find a few gold rings cash them in and invest in a better wet sand-water machine.HH!