FE-CO question

[pulltabfelix]

Coming from 3 years on the Nox 800 to the CTX3030.

I understand the CO conductivity range and why a type of metal will show up on different places along the CO line.

But I don't understand the FE vertical line. What determines where a ferrous item will show up along this line?

 

[jkline]

The iron content of the object, mineralization in the soil, depth, size of object, and/or combined iron content of multiple items under the coil.

I don't look at that number too much.

 

[sube]

I hunt in ferrous coin combine my user button is for high thrash conductive ferrous coin tends to throw all targets to the 12 line .Not so in the other 3 modes they act like a explorer where the fe # is given with the conduct # such as 12.45 to 35.45 by switching modes i am able to tell how much iron is involved with the target .
So when i circle a target it well read 30.45 to 21.45 the 21.45 in the circling is your best angle of the coin with the iron other things are involved in this anything from 32 to 35 well be iron i only dug 2 coins at 33.45
Your fe line should be set at 32 not 28 if you do a simple test where - =nail 0 = coin such as -0- a 1/8 inch apart on the same plane if set at 28 you well hear low low low there by missing this coin if set at 32 you well hear low high low there by hearing the coin .
Think of this as iron bias as the nox the lower the fe line such as 20 well give low tones to all targets with iron a low tone 20 to 35 well be low if iron is with it set at 32 all targets 32 to 35 well go low and all targets from 32 to 12 well go high. sube

 

[pulltabfelix]

I hunt in ferrous coin combine my user button is for high thrash conductive ferrous coin tends to throw all targets to the 12 line .Not so in the other 3 modes they act like a explorer where the fe # is given with the conduct # such as 12.45 to 35.45 by switching modes i am able to tell how much iron is involved with the target .
So when i circle a target it well read 30.45 to 21.45 the 21.45 in the circling is your best angle of the coin with the iron other things are involved in this anything from 32 to 35 well be iron i only dug 2 coins at 33.45
Your fe line should be set at 32 not 28 if you do a simple test where - =nail 0 = coin such as -0- a 1/8 inch apart on the same plane if set at 28 you well hear low low low there by missing this coin if set at 32 you well hear low high low there by hearing the coin .
Think of this as iron bias as the nox the lower the fe line such as 20 well give low tones to all targets with iron a low tone 20 to 35 well be low if iron is with it set at 32 all targets 32 to 35 well go low and all targets from 32 to 12 well go high. sube

Ok, I am getting closer to understanding. I was just thinking (incorrectly) that it was just reading say the iron content of the coin. It appears that it is showing you what is totally under the coil which makes more sense now that you guys have pointed these things out to me. The CTX3030 manual was of little help and maybe I missed that part in Andy's book.

Thanks

 

[pulltabfelix]

The iron content of the object, mineralization in the soil, depth, size of object, and/or combined iron content of multiple items under the coil.

I don't look at that number too much.

I looked at your answer and said to myself, "Huh?" but then realized that if I buried a cupcake full of copper BB's then they would be part of the FE analysis and reporting.

 

[jkline]

Today, with the Etrac, I got a 22 44 reading. Found a bent nail, thought I was fooled, and tucked the plug. Scanned, and to my surprise got a 12 44 reading. A wheat a couple inches above the nail.

So yes, your machine is analyzing Fe and CO of everything under the coil-- targets and trash.

 

[pulltabfelix]

if anyone does not realize that a good detector does report just about everything that is metallic, they ought to go to a very trashy (metal wize) park and dig a 1 cubic foot of dirt and take it home and sift through it. You will be surprised at the metal you will find. Take a strong magnet and you will be surprise how much small ferrous particles you will find. I actually did that when I was learning the Nox 800 and why it seemed so chatty. It was so chatty, because it was pretty darn good and reporting on these small metallic bits.

 

[jkline]

It is too chatty, imo. You get bogged down chasing ghosts.

 

[pulltabfelix]

It is too chatty, imo. You get bogged down chasing ghosts.

when learning the 800 I got caught up in that problem. My AT Pro was very quiet because it did not see all those small metal targets that were in the ground where I hunted. I actually thought there was something wrong the 800. Looking for deep targets and cranking up the sensitivity? Gads, I knew nothing about the 800 for the first few months. Of course later learned a lot about it and could set it up properly for my different sites with ease. But we parted ways recently due to my high freq hearing loss. My 800 needed to find an owner who could use it to its full potential. Hope the guy that bought it can do that.