Iron Mask Question

[DFXer]

I'm interested in how Iron Mask works on an SE relative to how iron discrimination works on other model detectors. If you move Iron Mask to the right (lower numbers) I assume that the SE rejects more targets that have lower ferrous content. If Iron Mask truely rejects iron then, if you set it to zero (black screen), it should still detect a conductive target that has no iron content whatsoever.

Is this true? If it isn't then Iron Mask is not exactly what is described in the Minelab manual.

Thanks,
Paul

 

[dewcon4414]

Not the way i understand it. Its called disc... as you move toward 0 or to the right you reject more and more good targets. You know that Ferr starts at 0 from the right and moves to the left whereas Cond starts at 0 from the bottom moving up. Its like the old graphs you learned in school. If you move from 31 to 0 and have a black screen everything is disc... everything. That would be like rejecting all the VDI numbers on the DFX.

 

[DFXer]

This is exactly my problem with it being called "iron mask" because it masks everything to the left of your setting. Granted, everything on the far left side is iron but, as you move to the right, more non ferrous targets get rejected.

It's masking more than iron - or is there something more technical going on?

Paul

 

[Captain Kirk]

Paul,

Regardless of how you set up a discrimination pattern, there will be a certain portion of the screen that is "blacked" out. The "blacked" out region of the screen determines which targets will not produce a target response (other than nulling of the threshold tone).

Using IRON MASK is just another way set up a discrimination pattern based upon the ferrous content of the target. If a target falls in the "blacked" out region of the screen, then it will be rejected regardless of its conductive component. If the screen is completed "blacked" out, then all targets will be rejected, but you will hear the nulling of the threshold tone for every target..

Hope this helps,
Glenn

 

[Steve(MS)]

Your assessment if fairly accurate. Think of the iron mask setting as a probability scale, the further the left, the more likely it is trash or a combination of ferrous with non-ferrous items or a deep non-ferrous item that is on the fringe of the capability of the circuits to ID.