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normalization of readings
Posted by: Jason in Enid
Date: November 11, 2017 07:41AM
I cant remember which thread it was in, but we were speculating whether the Equinox would have its own unique TID readings for each freq or if they would be "normalized" so that they all gave the same reading for a specific object.

I asked that question to Minelabs promo video on youtube and they responded that an object would have the same response across all freqs. I'm a little disappointed that we dont at least have the option of "unique" or "normalized" readings. There is a lot of info that can be gained by seeing TID shift across frequencies. Even the CTX slight shifting of noise cancel freqs alters the FE-CO response some.

Anyway, just thought I would share their response to that question.

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Re: normalization of readings
Posted by: mtwolf2270
Date: November 11, 2017 09:16AM
Interesting thought of course one could switch from multi to single and eval a single to determine more. I suspect that the fact it IDs solid across all freq when in multi has to do with the algorithm it use. ML keeps saying better target I'd at depth fast and more accurate then other vlfs. So I trust it will be extremely reliable.

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Re: normalization of readings
Posted by: Jason in Enid
Date: November 11, 2017 09:41AM
I'm not doubting its reliability, I just think there could be a lot of info to be gained to see the differences.

Re: normalization of readings
Posted by: Charles (Upstate NY)
Date: November 11, 2017 09:47AM
As already confirmed even the very slight shift in frequencies on FBS result in a few points difference in target ID. I have another brand machine, with one coil I can switch between 14.4 kHz, 28.8 kHz, and 54 kHz and the shift in target ID's across those frequencies is HUGE. The higher frequencies cram the targets together towards the top of the 0-99 range. A silver dime in Fine condition reads 87, 93, 96 at those three frequencies. A nickel reads 57, 72, 83. At the higher frequencies when targets start jumping around in ID due to depth you really don't know what you are digging.

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Re: normalization of readings
Posted by: Jason in Enid
Date: November 11, 2017 10:03AM
Quote
Charles (Upstate NY)
As already confirmed even the very slight shift in frequencies on FBS result in a few points difference in target ID. I have another brand machine, with one coil I can switch between 14.4 kHz, 28.8 kHz, and 54 kHz and the shift in target ID's across those frequencies is HUGE. The higher frequencies cram the targets together towards the top of the 0-99 range. A silver dime in Fine condition reads 87, 93, 96 at those three frequencies. A nickel reads 57, 72, 83. At the higher frequencies when targets start jumping around in ID due to depth you really don't know what you are digging.

very good info there. Have you found changes in the amount of ID shift based on the type of metal? I've long been curious if the freq/TID shifting is the key to spotting gold among aluminum. Of course that info doesnt help if it requires changing coils to see it, but to shift on the fly and see it could be important. Just an idea, no way to know if it has any validity.

Re: normalization of readings
Posted by: BigTony
Date: November 11, 2017 10:41AM
I always thought it was caused by ground minerals, rust or depth. If the new machine eliminates ground minerals then just maybe the TID will remain the same.
But it's a guess nothing more



BigTony

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Re: normalization of readings
Posted by: Jason in Enid
Date: November 11, 2017 10:58AM
The EQ won't eliminate ground minerals. The claim is that it has improved the ability to better differentiate between iron minerals and conductive targets. No detector, not even PIs are immune to minerals.

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