Problems with Dario MD-3006SS VLF

My detector has no problems detecting iron and alu pull tabs.. but when it comes to silver, gold, lead and coins.. it seems to be overlooking them .. i'm getting confused     .. gonna try to do some air tests with it, to see what it likes and what it doesn't .. (this might explain why i'm never finding any good stuff when i get to the beach and other sites) ..

I started to wonder whether it was me     


I did an air test the other day and it detected a coin ok (ish) 3-4" .. but as soon as i put the coins on the ground guess what, they vanished as far as the detector goes 

Do you have any ideas as to what might be going on? possibly the ground balance? or some setting i've not set correctly?

I have adjusted the sensitivity, ground balance and discrimination settings but still no difference .. also i just realized that the machine tends to "wander" allot and I have to hit the reset frequently (i.e. the needle tends to head up slowly and the pitch changes with it).. i'll pop out and get some new batteries (the ones in it are fairly new as it is) .. I don't know if that will help but its worth a try   

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,37250.msg229071.html#msg229071

ya i've always had the manual .. i've had the machine from new 

yes i follow the instructions everytime  .. but after about 5 mins it starts to 'wander' and thats where it gets confusing .. the strange thing is the areas i search should not change much as i only search about a 20m sq area at any one given time, and once it starts wandering its hard to get it to stay put and have to keep hitting the auto-tune button (reset)

i have also found depth perception not to be as good as shown on the manual after a few minutes (i suppose that is what you get for a machine that cost around 40 GBP)

but like i said the most confusing thing is some metals seem to not register when on/in the ground. I tried a gold ring the other day and that too was not picked up when on the ground, yet the air test proved positive. ..

another thing i have also noticed as per the instructions you need to search using setting TR1, but this does not seem to work very well, and i have started searching in the VLF setting (which works better and is more stable), but again still misses allot .... going to get some new (top quality) batteries today .. i hope that irons out a few of the problems and should also help increase some depth.

it may be the ground i'm testing it on (my back yard) possibly has a very high mineralization, as when i was digging recently i came across what would be best described as slag from an iron furnace or the like, and large amounts of carbon deposits (possibly old roman smelting site or shipped in with the soil when the houses were built in 1914 - but very strange to find this sort of stuff in the ground here where i live as nearby is salt works, not iron works, and it all seems to be on one layer about 18"-2' down, under which is natural sand layer - i found this out when digging myself a nice new pond just a couple of weeks ago...  I've only just put 2 and 2 together  )



Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,37250.msg229189.html#msg229189

SS is non ferrous.  A magnet should not be attracted to it.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,37250.msg229422.html#msg229422

		Quote:			Posted by homefire
	SS is non ferrous.  A magnet should not be attracted to it.

Not all stainless steel is like that. Some attracts a magnet just fine. Look it up.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,37250.msg229714.html#msg229714