Jump to content
Sign in to follow this  

Nokta Impact Beach Settings

Recommended Posts

Over on PA a new Impact user is asking for help because they can't get it to go deeper than a few inches and the only thing that I could come up with was to use a concentric coil, because I have not used one out in the field/beach,

And a dealer was really trying to sell me one today but not without making ***hole comments about my machine and the CTX when I asked him how it compared to mine,

anyways here is that link to PA if anyone has word of wisdom to help out,



Share this post

Link to post
Share on other sites

Comparing to a GPX on unknown targets? Just sounds like he wished he got a PI. No matter that you can change frequencies, the Impact is still a single frequency detector and when you mix salt water and mineralized Oz soil it will suffer compared to a multifrequency and especially a PI. It should however do as well as a single frequency machine can do but without comparing to another VLF no way to know what's going on.

COG (COnductive Ground) is the go to salt water wet beach or in water mode. A related thread at Findmall http://www.findmall.com/read.php?100,2392675,2393745#msg-2393745

From the Impact User Manual page 14:

Conductive Ground (COG)
This is a special mode of the IMPACT developed for conductive grounds (salty wet sand beach, grounds with alkali soil etc.). The feature of this mode presents the ability to ignore iron and similar targets in this group and to be able to perform ground balance on any type of ground. While the device performs ground balance in the range of 20-90 automatically in the other discrimination modes, the device ground balances in the range of 0-90 in this mode. This enables easier ground balancing on conductive grounds where normally ground balance cannot be performed at all or performed with difficulty.

In this mode, the device produces a low tone for ferrous targets with IDs between 0-15. For targets with IDs 16-99, it produces a higher tone which increases in pitch as the coil approaches the target. By using the Tone Break feature, you can adjust the break points of the target response tones on the Target ID range.

Different than the other modes, the Disc. is set to 15 as a default value in this mode in order to ignore ferrous metals or ground noise.

Salt water and alkali grounds are significantly conductive due to high ionization and cause effects similar to that of iron in detectors. These effects may make it impossible to search for metals with a standard detector. Existence of an iron elimination feature in a detector can improve the situation but may not be sufficient.

IMPACT's COG mode eliminates such effects and ground noise. Aspects to be taken into consideration while searching on conductive grounds are explained in more detail in the section titled Searching in Shallow Water and Beach (page 29).

And from page 29:

All search coils of the IMPACT metal detector are waterproof. This provides convenient searching in shallow water and on the beach. When searching around water, be careful not to get the system box wet. This includes the arm cup and control head electronics.

As explained before, salt water and alkali grounds are significantly conductive and cause effects similar to iron in detectors. IMPACT’s COG mode is specially designed for such conditions. You can perform your search easily using the COG mode without requiring any special settings.

COG mode is ideal for salty wet beach sand. You can use the other modes while performing search over dry beach sand.

You should consider the following while performing search over wet beach sand or water:
When you swing the search coil over the holes you dig in wet beach sand, you can receive metal signals, this is a normal condition.

2) The search coil may give false signals when going into and coming out of the water so please try to keep the coil either in or out of the water. 

  • Like 1

Share this post

Link to post
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
Sign in to follow this  

  • Similar Content

    • By Dave J
      Hello, All. Dave in Ohio.
      I've been fairly pleased with my Impact since purchasing the pro-pack from KellyCo last year. My negative issues this far have been minor: another short person's detector--Could someone please build a detector that extends far enough? Couple of inches of cable and some extra shaft? Not that big a deal, though a taller detector would be nice. 
      My issue now, though, is significant: When I've been detecting for an hour or more, my detector suddenly goes nuts. It starts jumping through numbers and making all kinds of noise. Point it at the ground--crazy. Point it at the air--crazy. Power off and on--the same. New batteries--the same. Changing frequencies or adjusting isat--no change. Lower gain, different coil, switching programs--no help. When it starts to happen, I know it's time to go to my backup detector. 
      So? Any ideas or similar issues? Any help much appreciated. 
      And yes, I also got online and updated.
    • By Tnsharpshooter
    • By Mike Haer
      I went back to Ohio for a week to show off our new little boy and see family. I begged and pleaded until Steph finally gave in and allowed a day of metal detecting. I took back the Nokta Impact and Fisher F22.. I'm not going to go into the F22 yet as I haven't written up an article but I will say the Nokta Impact did absolutely perfect.
       When I lived in Ohio I was mostly a relic hunter. Overlaying old maps and hunting in fields where old houses and other things once stood. I was really excited to see how the Impact would do. Well, it did better than I could even imagine! These sites are tough to hunt. Although little to no modern trash you have to fight the heavy iron debris to get to the good finds. Where the house or structure stood is where you will just find a ton of nails and iron, I call this ground zero. When I am hunting ground zero I have always used smaller coils with any other detector I've ever hunted with these sites. With the Impact I was able to run my 11 inch coil in even the heaviest of iron with no issues!
       I've talked about it a lot but worth mentioning again. The Iron volume setting is amazing! I was able to hunt with the iron volume turned way down or off. I preferred it on to know when I was in the thickest of iron but it was nice not to have to listen to it at full volume.
       As far as finds - I only managed a few buttons, musket balls and my friend managed a nice button and large cent. I found lots of small copper,brass and lead scrap. I have pounded the two sites I was at in the past. This past fall when I went back they were the only two fields around that the crops had been taken out of and this time they were the only two I could find that weren't flooded! I feel like I'm destined to be stuck in these two sites every time I go back!

    • By BLOODHOUND1970
      Does anyone here know first hand if there is any difference in the depth capabilities of the Multi Kruzer and the Impact. I am buying a new machine and depth and unmasking are the main things that I am looking for. Waterproof, salt water operation, and weight difference between the two really don't matter to me.
    • By Mike Haer
      I recently had the opportunity to review the Nokta Impact. I'm not going to go into details but to say I fell in love with it is probably an understatement! One feature that really stands out to me is the Iron volume setting. When learning the detector I was really surprised I hadn't heard about the Iron volume setting before as its amazing! Iron volume has two functions.
      1 - Instead of discriminating out iron you can adjust the volume from 0-5. 5 being the loudest and 0 turning it completely off. When I am relic hunting I run most detectors wide open of very close and listen to all that iron so I don't miss anything but it gets so annoying. With the Impact I can turn iron off, detector is still picking it up but I don't have to listen to it or I can hear it in a very low volume.
      2 - it can also be adjusted from n1-n5 on notched targets. The volume can't be completely turned off but the volume can be very low. The advantage to all this is when you start discriminating and notching out targets most detectors will start clipping on targets, slow down a bit and lose depth. With the Nokta you can just ignore or hear those targets at a very low level.
    • By Noah (FL)
      When switching between frequencies is it necessary to GB again or does the previous GB work for all 3 frequencies?