AT Pro VDI question

gliden07 · Dec 9, 2013

I don't own one of these detectors but am considering one for next year (just doing more research) and trying to understand the VDI numbers. This may pertain to all of the Detectors with a numerical display? On the AT Pro do the VDI numbers read the same on Pro mode and Regular mode?? In other words if I air test a silver quarter at 6" in Pro Mode and the Display says 86 (Making it up) if I test quarter in regular mode will it still show an 86 on the numerical scale??

DirtyRob · Dec 9, 2013

Yep....numbers should stay the same.

I only use/used the Pro mode for over a year.

Rather-B-Huntin · Dec 9, 2013

Yup, VDI is consistent regardless of mode.

And 86 is in the range of a Quarter on the ATP.

BentRod · Dec 9, 2013

Yeah, what they said. Additionally, if I understand it right, although the VDI will remain the same for the individual detector and I believe for other AT PROs as well, it may differ on other makes of detectors that also show VDI such as the Fisher F2.

Grumpysrb · Dec 9, 2013

The audio is different in the two modes. If you watch the Garrett video you can hear and see for yourself.

007tallguy · Dec 10, 2013

i'm glad you got some answers to that question. i've been swinging an At for a year and a half and never use the standard mode. :lol:

Dflan83 · Dec 10, 2013

I believe all the numbers are is just a scale of the conductivity of the target.

In an idea world all detectors that use VDI would have the same number if the scales were the same because they are all attempting to read the conductivity of the target.

Picture a metal detector as an electromagnet that transmits a magnetic field. when a magnetic field is passed over a metal (conductive) target an electric field (eddy current) is produced. This second field gives the detector plausible identification of the target.

silver being highly conductive reads on the upper end of most scales where foil/gold read lower

Skwerly · Dec 10, 2013

BentRod said:
Yeah, what they said. Additionally, if I understand it right, although the VDI will remain the same for the individual detector and I believe for other AT PROs as well, it may differ on other makes of detectors that also show VDI such as the Fisher F2.

Yeppers.

gliden07 · Dec 10, 2013

Thanks, it made sense they would but no one had asked so I figured why the heck not!!

iebrandon · Dec 10, 2013

all the vdi's stay the same until u change the coil to a 5x8 then they change
:yes:

gliden07 · Dec 10, 2013

iebrandon said:
all the vdi's stay the same until u change the coil to a 5x8 then they change

Good to know!!

Big Boys Hobbies · Dec 11, 2013

gliden07 said:
I don't own one of these detectors but am considering one for next year (just doing more research) and trying to understand the VDI numbers. This may pertain to all of the Detectors with a numerical display? On the AT Pro do the VDI numbers read the same on Pro mode and Regular mode?? In other words if I air test a silver quarter at 6" in Pro Mode and the Display says 86 (Making it up) if I test quarter in regular mode will it still show an 86 on the numerical scale??

Use the Pro Mode zero and never look back!

AT Pro VDI question

gliden07

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DirtyRob

Rather-B-Huntin

Elite Member

BentRod

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Grumpysrb

007tallguy

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Dflan83

Elite Member

Skwerly

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gliden07

Senior Member

iebrandon

Elite Member

gliden07

Senior Member

Big Boys Hobbies

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