impact Nokta User Manual
WARNINGS
READ CAREFULLY BEFORE OPERATION OF THE DEVICE
LEGAL DISCLAIMERS
►
Comply with applicable laws and regulations governing use of metal detectors
while using this detector. Do not use the detector without authorization in protected or
archeological sites. Do not use this detector around unexploded ordnance or in restricted
military zones without authorization. Notify appropriate authorities with details of any
historical or culturally significant artifacts you find.
WARNINGS
►
IMPACT is a state-of-the-art electronic device. Do not assemble or operate the device
before reading the user manual.
►
Do not store the device and search coil under extremely low or high temperatures for
extended periods. (Storage Temperature: - 20°C to 60°C / - 4°F to 140°F)
►
Do not immerse the device or its accessories (except for the search coil) in water. Do not
expose equipment to excessively humid environments.
►
Protect the detector against impacts during normal use. For shipping, carefully place
detector in original carton and secure with shock resistant packaging.
►
IMPACT metal detector may only be disassembled and repaired by Nokta Authorized
Service Centers. Unauthorized disassembly/intrusion into the metal detector control
housing for any reason voids the warranty.
IMPORTANT
IMPORTANT
Do not use the device indoors. The device
may constantly give target signals indoors
where there are many metals present. Use
the device outdoors, in open fields.
Do not let another detector or an electromagnetic device come in close proximity
(10m (30ft.)) to the device.
Do not carry any metal objects while using
the device. Keep the device away from your
shoes while walking. The device may detect
the metals on you or inside your shoes as
targets.
For Consumers within the European Union: Do not dispose
of this equipment in general household waste. The crossed
wheeled bin symbol on this equipment indicates this unit
should not be disposed of in general household waste, but
recycled in compliance with local government regulations
and environmental requirements.
FCC STATEMENT
This device complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
TABLE OF CONTENTS
ASSEMBLY.......................................................................................................................................................
INTRODUCTION TO THE DEVICE.................................................................................
BATTERY INFORMATION..........................................................................................................
DISPLAY.............................................................................................................................................................
CORRECT USE...........................................................................................................................................
QUICK GUIDE............................................................................................................................................
GROUND BALANCE..............................................................................................................
TARGET ID.........................................................................................................................................
SEARCH MODES (MODE)..........................................................................................
SETTINGS...........................................................................................................................................
BASIC SETTINGS.........................................................................................................
EXPERT SETTINGS...................................................................................................
PINPOINT.....................................................................................................................................................
TARGET DEPTH...................................................................................................................................
LARGE OR SHALLOW TARGETS.................................................................................
FALSE SIGNALS AND REASONS................................................................................
MAGNETIC MINERALIZATION INDICATOR....................................
ROCKS AND SEARCHING IN ROCKY TERRAINS.....................
TRACKING AND EFFECTS OF ROCKS...............................................................
METALS UNDER ROCKS..............................................................................................
SEARCHING IN SHALLOW WATER AND BEACH...............................
MESSAGES.................................................................................................................................................
SOFTWARE UPDATE...................................................................................................................
TECHNICAL SPECIFICATIONS.......................................................................................
1
2
3
4
5
6
7-10
10-11
12-15
16-24
16-20
21-24
25
26
26
26
26-27
27-28
28
28-29
29
30
30
31
1
6
9
5
7
8
2
3
2
4
4
Page 1
ASSEMBLY
(1) Insert the search coil cable through the hole at
the back of the lower shaft.
(2) Insert the washers on the lower shaft yoke.
(3) Insert the lower shaft yoke between search coil
mount tabs.
(4) Attach the search coil to the lower shaft using
the lever and winged nut without over-tightening.
(5) Fully insert the middle shaft into the lower shaft
and push it until it contacts the stopper. Then,
secure with the lever latch. If the lower shaft is not
inserted fully, the connector at the end of the cable
will not come out from the top of the shaft in the
next step.
(6) Join the two connectors of the system box cable
and coil cable paying attention to the pins, then
tighten. The system box cable is a retractable spiral
and you can pull it in case you cannot join the two
connectors easily.
(7) Join the middle and the upper shafts. Pull the
excess cable out of the hole and push the lever
latch on the upper shaft to secure. To adjust the
shaft length, loosen the lever latch on the middle
shaft, adjust the length to your height and press
the latch to secure.
(8) To adjust the armrest, loosen the bolts. Slide the
armrest up and down to adjust it to your arm and
secure by tightening the bolts.
(9) Adjust the armrest strap to your comfort.
Page 2
INTRODUCTION TO THE DEVICE
LCD Display
SELECT button to access the
basic settings
Keypad for navigation among
menu options and changing the
device settings
EXPERT button to access the
expert settings
LED flashlight
On / Off and volume / overload
volume adjustment button
Headphone jack
Battery compartment cover
Speaker
Ground balance and pinpoint trigger
1
Push down on the tabs on both sides and pull the
cover up in the direction of the arrow shown in
the picture.
Install the batteries, making sure to match the
positive and negative ends of the batteries to
the correct contacts.
Place the battery cover in the direction of the
arrow shown in the picture. Push down on the
tabs to get the cover click into its place.
2
3
Page 3
BATTERY INFORMATION
BATTERY INSTALLATION
The device is supplied with 4 AA Alkaline batteries.
The device can be used for approximately 9-17 hours based on the operating frequency
chosen. Battery life will be less in 5kHz compared to other frequencies. Other factors such
as LED flashlight usage and usage of speaker or wired/wireless headphones will also affect
battery life.
AA Alkaline batteries are recommended for the best performance. Good quality Ni-MH
rechargeable batteries can be used, instead. Rechargeable batteries with high mAh (capacity)
ratings offer extended operating times versus batteries with lower rating. Do not mix alkaline
and rechargeable batteries.
Low Battery Level
Battery icon on the display shows the battery life status. When the charge decreases, the
bars inside the battery icon decrease, too. "Lo" message appears on the display when the
batteries are depleted.
Page 4
DISPLAY
2
3
4
8
9
10
6 7
1
5
(1) Target ID scale.
(2) Cursor showing the ID of the detected target on the ID scale. It also indicates the IDs
filtered by Disc. and Notch Filter settings as well as the tone breakpoints. In the Static
modes, it indicates the signal strength.
(3) Search Modes.
(4) Basic Settings.
(5) Section which shows the warning messages.
(6) Section which shows the Target ID upon target detection, the ground balance whole
number value during ground balancing and the estimated target depth in the pinpoint
mode. In addition, the numeric value of any setting selected from the menu is displayed
in this field.
(7) Magnetic mineralization indicator.
(8) Expert Settings.
(9) Section which shows the fine tuning value during ground balance adjustment and
current ground balance value during search.
(10) Battery level indicator.
Page 5
CORRECT USE
CORRECT WAY OF SWEEPING
Shaft height is wrong Shaft height is correct
It s very mportant to adjust the shaft to your
heght correctly to be able to search wthout
dscomfort and fatgue.
Adjust the heght of the shaft so that you are
standng n an uprght poston, your arm s
relaxed and the search col s approxmately
5cm (~2'') above the ground.
It s mportant to keep the search col
parallel to the ground n order to get
accurate results.
The search col must be parallel to the
ground at all tmes.
Wrong search coil angle Wrong search coil angle Correct search coil angle
Incorrect way of sweeping Correct way of sweeping
Page 6
QUICK GUIDE
1) Assemble the device as per the instructions on page 1.
2) Insert the batteries by paying attention to +/- polarity.
3) Rotate the on/off switch located behind the device clockwise to turn on the device. This
switch also adjusts the volume of the device as well as the overload volume.
4) When the device is turned on, it will start in the DI2 mode and 14kHz operating frequency.
You can change the mode and/or the frequency based on ground conditions. For instance, if
you are detecting on wet beach sand, you may want to select the COG mode and a different
frequency. You can find more details on search modes and frequencies further in this manual.
5) To ground balance, push and hold the trigger forward and pump the search coil up and
down to 3cm (1.2'') above the ground until a “beep” sound is heard.
6) You can increase the Gain if needed. Increasing the gain will offer you greater depth.
However, if the surroundings or the ground cause excessive noise in the device, you need
to lower the gain setting.
7) Testing the device with various metals would be helpful for getting familiar with the
sounds produced by the device.
8) Based on the IDs of the metals you don't want to detect, you can adjust the Disc. setting
and ignore those metals. For instance, if you don’t want to detect ferrous metals with 00-05
ID in the DI2 mode, you can set the Disc. to 5.
9) If you are detecting in a very trashy area and the device is getting too many iron signals,
instead of Disc. you can use the Fe Vol. to lower or completely turn off the iron audio. This
will provide more depth.
10) You can filter out certain Target IDs using the Notch Filter and enable the device to ignore
these metals during searching or to provide an iron audio for them.
11) If you wish, you can adjust the tone break points of the device with the Tone Break
feature and change the frequency of the tones using the Audio Tone setting.
12) You can now start searching.
13) Since your device operates with the motion principle, swing the search coil right and
left maintaining 5cm (2") distance above the ground. If the search coil does not move, the
device will not provide any audio responses even if the coil is over a metal target (except
for the STATIC modes).
14) When a target is detected, the ID of the target will be displayed on the screen and the cursor
will indicate its position on the ID scale. (If you wish, you can adjust the ID Depth Level of the
device). The device will also produce an audio response according to the search mode selected.
15) Upon target detection, you can pinpoint the exact location of the target by pulling
and holding the trigger back. The audio volume will increase and the audio pitch will also
increase as you approach the target.
Page 7
GROUND BALANCE
Ground balance can be performed in three ways with the IMPACT: Automatic, Manual and
Tracking (Track).
If the trigger is pushed forward while performing automatic or manual ground balance,
the device will switch to the General Search (GEN) mode automatically on the background
without any indication to the user, regardless of the selected search mode.
Upon completion of ground balance, current ground balance value is shown in the Ground
Balance (GB) box on the right side of the display.
Automatic Ground Balance
Automatic ground balance is performed as follows in all search modes:
1) Find a spot where there is no metal.
2) Push the ground balance trigger forward (GROUND BALANCE value and “Pump the Coil”
warning message will be shown on display) and start pumping the search coil up and down
from about 15-20 cm (~6''- 8'') above the ground down to 3 cm (~1'') off the ground with
smooth movements and keeping it parallel to the ground.
3) Continue until a beep, indicating the completion of ground balance, is heard. Based on
ground conditions, it usually takes about 2-4 pumps for the ground balance to be completed.
4) Upon completion of the ground balance, ground balance value is shown on the display
(GB). The device continues to ground balance and produce a beep sound as long as you keep
the trigger pushed forward and pump the coil. In order to ensure that the ground balance is
proper, ground balance at least 2-3 times and check the ground balance values on the display.
In general, the difference between the values shall not be higher than 1-2 numbers.
5) If you cannot ground balance, in other words, if no beep sound is produced, it means that
either the ground is too conductive or not mineralized or there is a target right below the
search coil. In such a case, retry ground balance at a different spot. If you still cannot ground
balance, read the section titled “Important Details Concerning Ground Balance”.
When the ground balance trigger is released, the device continues to operate in the GEN
mode for a short period of time and the ground balance value stays on display. This makes
it possible to manually fine tune the automatic ground balance value. Refer to the following
“Manual Ground Balance” section for further information regarding this feature. If this is not
desired, pull and release the trigger once to return to the main screen.
Page 8
NOTE: If the iSAT value is set high, the device may not auto ground balance. In such a case,
lower the iSAT value first. After ground balancing, set the iSAT back to its original position.
Manual Ground Balance
Allows you to manually modify the ground balance value. It is not preferred mostly because
it takes time. However, it is the preferred option in cases where a successful ground balance
cannot be performed using other methods or minor corrections are required to the
automatic balance.
IMPACT is designed to allow for automatic ground balancing conveniently on any type of
ground. Therefore, it is recommended to perform automatic ground balance upon start up.
However, the ground may not be suitable for automatic ground balancing in some cases
and the device cannot ground balance on such grounds (Except for the COG mode). For
instance, wet beach sand, soils containing alkali or salty water, trashy sites, ploughed fields,
highly mineralized grounds and grounds with very low mineralization are not suitable for
automatic ground balance. In such terrains, you can auto ground balance in the COG mode
and then switch to other modes or try manual ground balancing. However, manual ground
balance requires a skill which develops over time through practice.
To perform manual ground balance:
1) Find a clear spot without metals and switch the device to the GEN mode.
2) You need to listen to the sounds coming from the ground in order to perform manual
ground balance. Pump the search coil up and down from about 15-20 cm (~6''- 8'') above
the ground down to 3 cm (~1'') off the ground with smooth movements and keeping it
parallel to the ground.
If the sound gets higher when lifting off the search coil above the ground, the ground
balance value is too low, in other words, the effect from the ground is negative and the
ground balance value needs to be increased by using the ( + ) button. On the other hand,
if the sound gets higher when lowering the search coil to the ground, the ground balance
value is too high, in other words, the effect from the ground is positive and the ground
balance value needs to decreased by using the ( - ) button.
3) Push the ground balance trigger forward once and release it. The ground balance value
will be shown on the display and remain there for a moment. You can return to the ground
balance screen by pushing the ground balance trigger forward if the screen switches.
Manual ground balance functions within the range
of 0-99. However, each value covers 5 steps used
for fine tuning within itself and these steps are
indicated as multiples of 20 in the Ground Balance
window (GB). For example, ground balance value
shown on the side is 70.80.
Press ( + ) or ( - ) to increase or decrease the ground
balance value, respectively. If the key is pressed
once at a time, the values count one by one and if it is held down, the values will change
quickly.
GROUND BALANCE
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