Hello. I am a new metal detector user or shall I say a novice. I have owned a couple of White's in the past namely a Eagle Spectrum in the 90's and more recently an XLT. However I have sold the XLT and I just purchased a Fisher CZ 70. All the reviews I have read before purchasing it (used from a man in my detecting club), has shown it to be an exceptional machine. I liked the idea of the CZ because it seemed to be simple and offered a manual ground balance. However I am having trouble ground balancing. I have tried the pushbutton method which seems to be the easiest but I get no tone. I read in the manual that if I get no tone when I am balancing then the soil has very little mineralization and to leave it on 10. I live in an area about 35 miles northeast of Houston Texas. My question is could the manual be right about low mineralization or am I really that big of a rookie and just haven't got it on ground balancing yet?
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CZ 70 ground balancing
- Thread starter derby80
- Start date
Turn it on then turn the ground balance button on 5 then put the cz in auto (all metals) make sure that your not over metal then pump the detector (coil) up and down about 6" while turning the ground balance button until it is quite then your done, be sure that you put it back into I.D. mode. HH
PhantomHunter
New member
Just make sure you are not over or close to a target when balancing. I start in Auto Tune and find a fairly clean spot to ground balance.
derby80 said:
I previously posted this for another user in this forum but I'll post it one more time for you.
G.B.
You'll probably want to pump the coil up and down toward the ground as in the manual ( All metal mode )
while adjusting your ground balance, after the GB seems to be set and there is no threshold
continue to turn it and you will then notice that the threshold comes back but instead of sounding off when pushing the coil to
ground it will now give a threshold in reverse when pulling the coil away from the ground.
Now, set the GB knob in the center of this threshold difference and you will then have near perfect ground balance.
If your sensitivity is too high when you G.B. you will have to lower it and try again until the unit is stable.
If the Sens is too high and you are in materialized ground with lots of EMI present, your GB will not stay put.
Derby, you are probably correct about the low mineralization in your area. I live in South Florida, soil here is very sandy, with virtually no mineralization. I've used the CZ series machines here for about 12 years, and i never get a tone on the GB whether i used the pushbutton or bobbing method. So, I just leave it at 10 for land hunting. On the wet sand at the ocean is the only place i need to GB again - there the machine will GB to around 7 using the bobbing method. I've always wanted to ask this same question to "Nasa Tom Dankowski" (since he designed the Cz-3d machine), and hear his take on it. He lives near Titusville, Fl and probably has similar soil conditions to mine - he might say the same thing I did about the GB settings for low mineralized soils.
Also keep in mind that changing the mode switch from "norm" to "salt" may affect the number that your machine will like to GB to. "norm" mode will give you the best depth, but at a cost. You will get more chatter (i.e. false signals) with it, "salt" mode is quieter but will get slighly less depth (< 5%). This has been my experience with it.
Hope this helps.
Mark
Also keep in mind that changing the mode switch from "norm" to "salt" may affect the number that your machine will like to GB to. "norm" mode will give you the best depth, but at a cost. You will get more chatter (i.e. false signals) with it, "salt" mode is quieter but will get slighly less depth (< 5%). This has been my experience with it.
Hope this helps.
Mark