I cannot get my coinstrike to correctly indicate iron. Many times it indicates a good target no matter how many angles I approach the target, and the reading says a +15 to + 28, but it turns out to be an iron nail or other elongated iron target. I'm running 8 sensitivity, 99 discrimination, 10 volume,and minus 20 threshold. My ground is not mineralized. What am I doing wrong?
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Coinstrike discrimiination
- Thread starter E.V.
- Start date
EV, Your problem baffles me too. I have 2 CoinStrikes. Try discrimination at about 50, iron nails will be quiet with some sweeps and negative numbers will show with some sweeps with disc at about 50. I run very little discrimination for iron but I look at the meter and listen how many times I hear iron tones when sweeping. Iron, big and small, is tricky because it will give high tones mixed with low tones. I still dig a lot of iron nails and stuff, but the detector rejects a lot of iron targets too. Bigger iron targets give high tones only, just like a coin does.
MarkCZ
Well-known member
What happens with certain iron targets is like "jabbo" says, we only look at the meter when we hear the high tone, which will be the positive side and we don't watch the meter for a few swings over the target before we dig it.
What all that means is the display is all metal, and a true high tone target will not display a negative number, but an iron target will many times give off an equal (or near equal) negative number and we don't know to check the display for the negative because its not heard.
One thing to watch for is if any of the swings over the target is silent, that's a possible give away to a negative iron reading which is the time to watch the display.
Mark
What all that means is the display is all metal, and a true high tone target will not display a negative number, but an iron target will many times give off an equal (or near equal) negative number and we don't know to check the display for the negative because its not heard.
One thing to watch for is if any of the swings over the target is silent, that's a possible give away to a negative iron reading which is the time to watch the display.
Mark
EV, I just read Mark CZ's reply and I agree. Mark knows the C$ like no one else. I always look at the meter when I get a signal in All Metal and in Disc mode too. If I have iron Disc set at 50 and I am in Disc mode, some of the sweeps will not give any audible signal at all, and some of the sweeps will give me a negative or postive signal. Those silent sweeps tell me iron is being rejected. Also, when in Disc mode, every coil sweep should be the same height and angle. If the coil is not centered over the target the detector reading will change with each sweep. Sweep accuracy is important especially for small and deeper targets. All Metal mode detects deeper and it detects much wider than Disc mode does. I always use All Metal mode when targets are far apart.
Make sure you're ground balanced and try turning sens down a bit. I'm with Jabbo I can usually tell an iron target when i'm sweeping while walking around the target in a 360 degree pattern you'll see the numbers go neg here and there. I also keep my disc at 99. It's a hard detector to learn but I really like it.