Nokta Impact Gold Coin Responses And Target ID Notes

[Steve Herschbach]

Nokta Impact Gold Coin Target ID Responses* in GEN, GEN (D), STA, STA (D), DEEP, VLX1 and VLX2 modes (0-40 ferrous, 41-99 non-ferrous) Seen notes below on alternate target ID scales.

.................. NORMALIZED....... 5-Khz.....14-Khz...20-Khz

$1.00 Gold Coin....... 51............ 47...........52..........54 
$2.50 Gold Coin....... 62............ 51...........62..........70 
$5.00 Gold Coin....... 72............ 55...........72..........80 
$10.00 Gold Coin...... 82............ 65...........82..........83 
$20.00 Gold Coin...... 84............ 75...........84..........85 

The normalized setting equalizes responses in all frequencies to be the same as the 14 kHz response. At start up, the Nokta Impact will utilize the ''Normalized'' ID scale and not the Standard ID scale. In other words, the IDs will not change upon frequency change and the device will generate the 14kHz IDs in each frequency. However, based on ground conditions IDs may vary for certain metals.

If you prefer to see the different IDs produced by each frequency, you need use the ''Standard'' ID scale. To switch to the standard IDs, pull the trigger and push the (+) button at the same time. Letters ''Sd'' will appear on the screen. If you wish to revert back to the normalized IDs, repeat the same process and letters ''no'' will appear on the screen.

In General, low frequencies spread out coin responses but compress low conductive responses. High frequencies spread out low conductive responses but move coin responses closer together. See the target table below for reference. Therefore, running in in the 5 kHz "Standard" or un-normalized mode will provide better target ID separation while coin detecting. Running in 20 kHz Standard mode will provide more definition between U.S. nickels, gold jewelry, and various aluminum items. However, target ID number changes between modes may be confusing for some people and make the Impact harder to learn. In need this case using the Normalized setting is recommended.

The Nokta Impact is somewhat unique in that depending on the mode there are two possible target ID scales in use. In DI2, DI3, DI4, DI99 and COG "coin and jewelry" modes, the ferrous range is 00-15 at factory defaults. This provides the most target definition in the non-ferrous range for people only interested in non-ferrous targets. In GEN, GEN (D), STA, STA (D), DEEP, VLX1 and VLX2 "gold and relic" modes, the ferrous range is 00-40. This provides the most target definition in the ferrous to non-ferrous range for people who hunt for items where these ranges overlap.

It may then be seen that by picking a combination of both the mode used and a Standard operating frequency the Nokta Impact can customize target ID responses to a degree quite rare in metal detectors offered today. For instance, most coin hunters may want to use the DI2, DI3, DI4, DI99 modes in Standard 5 kHz frequency mode for the best target definition on silver coin range targets.

*The gold coin responses are from the Tom Dankowski post at this location.