sinsitivity

[jimzz977]

I wondering i have a bh elite 2200 i been using second bar on my sinsitivity setting on my detector , im i missing deeper targets?

 

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[ivan salis]

ok here is some help * sensitivity is power output they are one in the same --the more sensitivity / power you can put out the deeper the signal will go generally speaking , however there are limits on how much "signal (power) that the soil will accept ----mainly you are limited by the mineral levels in the soil --some ground is "sweet" (low mineral levels -so you can run high signal levels and get better depth ) while other ground is sour ( very high mineral levels -very hard to hunt due to conditions -- you may have to greatly lower your sensitivity levels to make the machine run stable) --- its generally thought by most folksl best to run as much sensitivity as you can in a area , without the machine falsing a lot -- if a machine is going nuts --beep, beep,beep first check the batteries to see if their charge level is good , then if its not that try very slowly lowering the sen / power output level just until she runs "smooth" --this is for preset ground balance machines-- of course --if you can manually GB do so to suit the local conditions.

the term GB = means --ground balanced --that is when your machine 's signal output level "matches" the maximum amount of siignal that the grounds mineral conditions will accept -- ie your running at your machines "peak level"--(maximum depth) it means everything is just right.

 

[Frankn]

Its like setting your threshold for pain. The higher you set it the more good targets you will find, and the more false targets you will find. It's a tradeoff that you have to settle on.

 

[ivan salis]

discrimanation * is what you use to sort metal A from metal B -- it helps you tell one metal from another * discrimanation is differant from sensitivity / power -- discrimanation works by electrical conductivity level of metals --based upon the reaction of the signal return sent back to the coil a metal detecors curcuits "thinks" using preset values built into its program -- so its "programming" goes well , I think I found * -------type of metal and based upon a coin sized type object size it is so deep in depth * --- however some metals have very similar "electrical conductivity levels" and similar sizes --lke oh a "old ring type pulltab and a gold ring" -- or a clad dime (with a copper core) and a pre 1983 "copper" cent -- or older indain head cents and modern zinc cents

discrimanation has a "scale" (iron at the low end to silver at the high end)--the higher you set it the less you will find since you will "knock out' more types of metals from being detected -- however if used properly it can cut way down on trash digging while only running the risk of the loss of only the very smallest of gold items = like a earring -- rings and larger type items should still be found.

 

[Frankn]

Lets get something straight. You can't adjust power output. It is a sealed FCC regulated area. Sensitivity is a receiver adjustment. Your receiver uses it's computer program to"guess" at what the metal is. The program is based on coin size objects. You always send out "100%" power. You set the ground balance to cancel out the amount of the signal that is bounced back by the mineralization of the ground. The remaining signal that is allowed to return is fed into the computer program. It uses this info to "guess" at what the metal is and how deep it is. It is only accurate on coin size objects as you have probably noticed.

 

[ivan salis]

ok -- by adjusting the "reciever" and how it "recieves" the returning signal --you might as well be adjusting the "output" if you get my drift --since you are adjusting how much of the signal output you are recieveing back , the results are the same as sending out less signal to start with -- the bottom line is this --- you are "lowering the amount of signal that your machne is getting back and processing "(thus making it a bit less sensitive to nearby EMF and minerals in the soil ) wiether its by putting out less signal or "filtering" the returning signal . thus mimicing a lower overall signal output the basic effect is the same.. -- but frankln is correct in the fact --the machine just " filters" the return signal --thus causing the machine to act as if it had recieved less signal. in general * -- I try to keep things simple, to keep from confusing new to detecting folks-- sorry that I mispoke

 

[northcal]

Wow. Thanks ivan and frankn.
Great information.