Jump to content

Fisher Impulse AQ Discrimination Explanation


Recommended Posts


Thanks Alexander for that diagram.  I was hoping that with the discrimination mode you could discriminate the coins of 1, 2 and 5 cents.  Around here most of the beaches are full of these coins that are useless, not even for the legal course, as they deteriorate greatly.  I leave an example of how those coins come out

20200109_113738.jpg

Link to comment
Share on other sites

Hi , yes I agree with Luis , tiny bits of iron like the euro 5cent above and very small nails will not be rejected by the AQ if I understand well. Could you confirm this alexandre ,  because those very small nails/bits of iron are not shown in your diagram. Thanks … Alain

Link to comment
Share on other sites

42 minutes ago, palzynski said:

Hi , yes I agree with Luis , tiny bits of iron like the euro 5cent above and very small nails will not be rejected by the AQ if I understand well. Could you confirm this alexandre ,  because those very small nails/bits of iron are not shown in your diagram. Thanks … Alain

And in North America the Canadian coins with their composite cores!

Link to comment
Share on other sites

hmmmm.

How small of an item can I go down to with 7 ns pulse delay?

HH

Mike

Link to comment
Share on other sites

On 1/9/2020 at 9:38 AM, Mike Hillis said:

How small of an item can I go down to with 7 ns pulse delay?

There have been various posts already that explain that the Impulse AQ is locked in “salt mode” and by design is not set to pick up the smallest gold i.e. aluminum even while in all metal mode. The Impulse is designed to pick up gold rings specifically and particularly the “sweet zone” where the most gold by weight occurs while excluding everything else.

  • Like 1
Link to comment
Share on other sites

4 hours ago, palzynski said:

Hi , yes I agree with Luis , tiny bits of iron like the euro 5cent above and very small nails will not be rejected by the AQ if I understand well. Could you confirm this alexandre ,  because those very small nails/bits of iron are not shown in your diagram. Thanks … Alain

The small iron is rejected and makes a double beep, but the coins with a layer of copper like the 5c no.

  • Like 1
Link to comment
Share on other sites

58 minutes ago, ALEXANDRE TARTAR said:

The small iron is rejected and makes a double beep, but the coins with a layer of copper like the 5c no.

even if they are rotten alexander?

  • Like 1
Link to comment
Share on other sites

33 minutes ago, Luis said:

even if they are rotten alexander?

Between 7µs and 8µs cutting the 5c, 2c and 1c requires increasing the reject a little more, but from 8µs included the rejection is set at 50% and gives a multitone sound.

If you cut the 5c, 2c and 1c you will lose beyond 18K 25 grs depending on the diameters.
However the 14K is not rejected. And of course below this weight in 18k it is not rejected either.

Discrimination is an advantage in polluted areas even on a BBS, but it must be used with intelligence.

In addition you will detect gold and iron at the same time, and it continues to detect gold.

  • Like 2
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...