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therover said:Buddy...you have a great salt water unit in the CZ21. Unlike the land based CZ's the CZ20 and CZ21 do not have a switch to change from normal to salt mode. The waterproof CZ's are always in what is called 'salt mode'.
The main thing you want to make sure of is your CZ needs to be ground balanced correctly. Practice ground balancing using the bobbing method. It's a bit more tedious but more accurate than the pin point method.
If you hunt in auto tune, make sure the sensitivity is set high enough so you can hear that faint warble sound. It's not really a threshold type sound but a sound that is constant and will change when the coil goes over any metal. If you then switch to discriminate mode from there, MAKE SURE YOU SWEEP VERY SLOW. Since the sensitivity at that point is set very high, a faster sweep speed will bring out false signals. To remedy that, lower the sensitivity. One thing about CZ's...if the ground balance is off or the sensitivity too high for the conditions, it will tell you by frequent falsing.
When using discriminate mode, I always hunt in setting 0. That way I can hear any iron and can also distinguish when 'iron wrap' occurs. That's when the low tone bleeds over to high tone. If you don't run in 0, then you will not hear the low tone when a low/high tone occurs and will only hear the high tone....and think it's a good target. Very deep iron will wrap into the high tone area. Always run in 0. It may be a pain at first but will save you from digging a lot of deep iron.
Repeatable mid and high tones are the tones to dig the most at the beach. There are times when very deep low/high tones should be dug. Depends on the conditions and the beaches. At old beaches where a lot of silver coins can be found, dig those deep low/high tones ! Many will be deep iron but I have found a lot of deep silver dimes and quarters when digging low/high signals.....especially when you circle the target at different angels and get only repeatable high tones with an occasional low tone mixed in.
The CZ does not need to be run with the sensitivity very high.
Also, when running in auto tone, the entire coil is hyped up and very sensitive. In discrim mode, the center of the coil is mostly the hot point. As you increase sensitivity, after a certain point depth does not increase but the area of the coil becomes 'hotter'.
To start out, like others have mentioned, you can start with the presets, but that means the GB will be at 5....that may not be the optimal setting on your beach. ALWAYS manually ground balance to get that point set to as neutral as possible. Also, ground balance often. It takes 30 seconds and beach conditions can change and you want your CZ to be at optimal at all times.
Above all...HAVE FUN. It's a great unit !!! Been using CZ's since the CZ6a came out. Bought one brand new and it's still going and is still my go to detector, land or beach. They are my favorite units.
tvr said:Same set up. If you can't seem to get a ground balance over fresh water area, set the ground balance to 10. Other things should track to what was covered above.