Salt Compensate Frequency

[ISLANDJOE]

While I was reading the Owners Manual I jumped over to the Expert Manual and was trying to find out how does and when does the Salt Compensate Frequency come in to play. Is it actually a frequency? How does it work?


BOB

 

[GraveDiggerMax-VaBch-Va]

n/t

 

[DELTA196]

At a guess I would say it is similar to the DFX in that it locks the ground balance circuits at the salt reading (+2) then there is a scalance calculation for the iron based ground minerals. This is how the DFX can be balanced to salt and ferrous ground at the same time. The DFX would have been one awesome machine if you could have turned this feature on or off, as it is when the DFX is in dual frequency mode it is not very sensitive to any targets (gold?) in the 0 - +10 VDI range becuase it is balanced to ignore salt at around a VDI of +2. This is why the DFX is more powerful in single frequency mode.

The Vision appears to have the option to switch in or out the salt elimination. Should prove a very powerful option.

 

[ak_1234]

Salt is not one frequency. There are 5 frequency options: 3 frequency, salt, single 2.5kHz, single 7.5kHz and single 22.5kHz. The single frequencies are as they say - only one frequency is running. 3 frequency and salt are both running all 3 frequencies, so the target ID is still operating on all 3 frequencies for both options. The difference is that 3 frequency is using all 3 frequencies for the audio and determining when a target is seen (sort of a summing function). Salt compensation uses the 2.5kHz and 22.5kHz signals to subtract salt water out of the signal for the audio and determining when a target is seen. Because of this subtraction, sensitivity to targets is decreased but necessary to remove salt. So, when you are hunting on the beach around salt water, you want to be in salt mode so the salt water doesn't give you false targets. If you are not in a salt water environment (doesn't necessarily have to be at the beach to be a salt water environment if the ground has salt and is damp), you are much better off using non salt mode (either 3 frequency, or single frequency of your choice).

 

[ISLANDJOE]

ak_ 1234,

Thank you for your answer. It appears by the way that you answered the question that you have an in depth knowledge of the Vision. That's interesting.

Salt is a big part of my daily environment so this will work for me.

What could be the effect of giving up some sensitivity? Could it be giving up a ear ring or another small target just to eliminate falsing or is the effect this noticeable.?

On my current detector I am constantly adjusting my sensitivity. Yes it has a auto feature for this,but at times I have to switch the sensitivity to manual because the auto feature can,t handle the change.

Aloha,

BOB

 

[ak_1234]

Yes, this can happen. Salt is less sensitive so you will lose being able to find deep targets. Small targets, because of their size, mimic deep targets so depending on the size of the target, they can get lost as well.

 

[steve herschbach]

Hi Joe,

Wet salt sand is conductive, so it signals. Small gold items like tiny earrings or thin chains, etc. give exactly the same signal.

Any detector that tunes out the salt signal, be it a VLF or a PI, will also tune out those items that read the same as the salt reading. The bottom line is some items are not detectable under some conditions with current technology.

Steve Herschbach

 

[ISLANDJOE]

DELTA196, ak_1234, and Steve:I first want to thank you for every one for there comments. The only way to gain additional knowledge is to put it out on the table for feedback.I am trying to figure out by reading the manuals how to use the detector and get the max out of it. I haven't purchased as of now. I am trying to figure out by using the Salt Beach Program and get the max out finding the small jewelry and rings. I live in a prime location for this.I just mention some of the conditions I have ran into so far using my other detector.Most of the rings that I have found so far have been within 2 to 5 inches of the surface. As far as finding any more coins and as TerryinHawaii said " I couldn't care any less". Reason for this there just isn't much older cons left on the beach due to so many people every night out there hunting. So my primary use will be to find the rings and small jewelry. The Vision seems to be the latest in Technology that has a frequency that specializes in gold.

Thank you everybody.
BOB

 

[Larry (IL)]

I was hoping one of the White's guys would answer your question Bob..........Thanks ak and others.

 

[TheMarshall]

Hi Joe,

Wet salt sand is conductive, so it signals. Small gold items like tiny earrings or thin chains, etc. give exactly the same signal.

Any detector that tunes out the salt signal, be it a VLF or [size=large]a PI, will also tune out those items that read the same as the salt reading[/size]. The bottom line is some items are not detectable under some conditions with current technology.

Steve Herschbach

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Hi Steve!


What is the PI 'reading' to which you refer?

I don't own a PI that categorises targets, so I'm curious regarding which PI machine you are relating to.

I agree with the generality of your proposition as far as any 'Frequency domain' detector is concerned, but disagree that it 'tunes out' in the absolute sense, the targets you are implying.

By that I mean 'normal gold rings'.

Thin, wispy gold wire 'things' are ONLY poorly detected if they are of 'open circuit loop' design.

Technically, Yes you do 'desensitise' a detector when its GB phase approaches that of targets with a similar phase characteristic, but then you have to examine the band-pass characteristics of the ground-filters to get the complete assessment of such a detector's final responsiveness, under such conditions and target involvement.

I have detected thin gold 'open-loop' earrings, with an 'ordinary' PI, whilst still being unperturbed by the wet sand.


TheMarshall

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Any readers interested in 'ground balancing', must learn, that the detector even when optimally adjusted, ONLY MINIMISES ground effect.

It doesn't eliminate it absolutely. (For there is in reality, no such thing as perfectly consistent ground). Even if there were such a paradise, then your inconsistent search-sweeping still generates its own modulating effects if the ground is undulating and has any ferrous contents.

So you then have to 'FILTER out the residual variations by matching your sweep speed to the characteristics offered by the 'ground' filters.

Dry sand....free from Fe....is not considered to be 'ground'.

 

[Diggler]

I have been reading elsewhere that salt compensate (not salt mode) switched on does take away from depth and sensitivity as stated here earlier in this thread but... In some soils it also settles down the machine allowing you to crank up other settings to reach greater depths and have greater sensitivity. Guess nobody here has experimented with that? I hope to in a couple weeks when I get my V3i!