CZ-70 Pro Maiden Voyage & Questions

I met up with a friend at Golden Gate Park today to see if the CZ-70 would do as I anticipated it would in a heavily hunted park next to an EMI nightmare.

I'm happy to report that as far as EMI was concerned it was rock solid and stable with a sensitivity setting of 6 using the 10.5" coil. Depth was good, as I found it going deeper then my F70 at the same park. The F series machines don't do well under certain EMI situations, such as with Sutro tower a main communications tower in San Francisco that outputs VHF, UHF, FM and DTV with a collective power output of 24,242.7kW that's about a mile away from Golden Gate Park.

I found the coil bobbing ground balance procedure to be a piece of cake (it would GB right at 3). I ran it with nothing notched, sensitivity of 6, and volume set to 10 to take advantage of the "audio boost" capabilities.

I noticed that the depth readings were typically inaccurate for shallow targets when the CZ-70 indicated them to be at 0" - 2" (they would typically be far deeper).

I ended up with a silver Washington Quarter, five wheaties, a pile of clad and a multitude of relics (and trash too of course).

One thing that drove me nuts was it's propensity to ID screw caps in the high coin TID zone. Anyone have any ideas how to accurately ID screw caps to prevent digging them ?

I did run into an issue. Once and a while the LCD display would go bonkers with random characters. Fiddling with the settings or using the pinpoint function would sometimes bring it back to normal, yet other times I'd have to power cycle it to reset it. It's not horrible, and I could live with this, but if there's a remedy I'd like to apply it. Any idea what's happening here?

Thanks,
Brian

The stock 8" coil would be the most accurate w/depth. Your encounterings with the larger coil reading targets as 'shallow' is typical. You will notice that the small 5" coil will perform just the opposite. A 6" deep coin will register as 8" or 10" deep.
I presume this park was heavily hunted before...... and it sounds like the CZ performed well.

The display problem sounds 'moisture' related.