MXT Vdi readings

[acemagurgle]

Im just curious if anybody else gets Vdi readings that don't match what the MXT Pro is showing me on the screen? Example: In coin /jewelry with settings at 2-3 discrimination, 7-8 gain , I kept getting readings of 45 Vdi , Ring/pull tab , and everytime i dug up they were pennies? Just wonder if anybody can help ? This search took place in a park, any suggestions? Thanks

 

[Tom Slick]

I'm sure they are newer zinc pennies, so it could be the soil they are in is pulling the VDi numbers down. Are you ground balancing the detector prior to starting your search at each location?

 

[acemagurgle]

yes I am ground balancing, soil isn't highly mineralized , makes me say to myself, dig it up even if you get readings that don't correspond to what the detector s teliing me, thanks for your input

 

[Larry (IL)]

Does the odd VDI's happen just in this park? Something is not right, a VDI might vary by a couple numbers but it is not normal to be off that far.

 

[Nancy-IL]

Zinc cents should read in the high 50s to high 60s depending on how decomposed they are. I agree with Larry, something isn't right. Have you done any air tests with different items and coins? I would start testing items if not.

 

[acemagurgle]

No I haven't done any air tests , ill try that to see , thanks for your input

 

[poorman]

Are you using a White's Coil ? I know some after mkt coils read different, usually lower VDI

 

[JC99328]

My machine was running some odd number yesterday too. The ground was vary wet to the point of water in the holes when I dug. Every reading that said "quarter" was a dime !! Never did find a quarter. But I was ready to put out a hit on whoever was drinking Corona !! Dud left about 1000 caps in the place.:veryangry: