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false signals. Gain setting is a personal preference. However, It is important to set the gain set-

ting to the highest level possible where no major popping sounds are heard to avoid missing 

smaller and deeper targets. For example; if the noise level is suitable for searching and is the 

same at gain levels 40 and 70, then 70 should be preferred. Using the factory default levels 

will be a good starting point until you get familiar and experienced with the device.

Gain in Discrimination Modes:

Since the threshold setting is not available in the discrimination modes, you can increase 

the depth of the device or ensure noise-free operation on different grounds only by using 

the gain setting.
In order to adjust the gain in the discrimination modes, first ground balance while the gain 

is at its default setting. After ground balance is completed, hold the search coil stationary 

or swing over the ground at search height. Reduce the gain if the device receives noise. If 

not (ensure that the Disc. is also at its default settings when checking this), increase the 

gain gradually until there is no popping sound. If the device starts to receive noise during 

searching, reduce the gain gradually.

NOTE:

 

IMPACT

 is a high gain device and some of the search modes will run relatively noisy 

(Deep, DI4, VLX2) compared to other modes so as to provide the best depth performance. 

However, due to the design characteristics of these modes, the noise will be heard more if 

the coil is in free air than sweeping the coil on the ground. Please keep this factor in mind 

while adjusting the gain.

Gain in Static Modes:

The factory default for the gain setting is optimized. In situations where you would like to 

adjust the gain setting (sudden changes in weather conditions, different ground structures 

and environmental noise), first re-ground balance. If there are significant positive or negative 

threshold drifts after ground balancing, increase the iSAT setting in the Expert Settings. If the 

drifts still continue frequently, drop the gain to 39, decrease the iSAT and re-ground balance.
In situations where the environmental and ground conditions allow, you can obtain more 

depth by increasing the gain and lowering the iSAT.

Threshold (Thresh.)

In the General Search Modes (GEN and GEN (D)), search is performed with a continuous 

humming sound in the background, also referred to as the threshold sound. The loudness 

of this hum directly impacts the detection depth of  smaller and deeper targets and it is 

adjusted by the threshold (Thresh.) setting. If the threshold is set too high, a weak target 

signal may not be heard. On the contrary, if the threshold is too low, you give up the depth 

advantage this setting offers. In other words, weak signals of smaller or deeper targets may 

be missed. It is recommended for average users to leave this setting at its default value 

and for experienced users to adjust to the highest level where they can still hear the weak 

target signals.

Threshold level is directly related to the Gain and iSAT settings. Please be sure to read the 

related sections of the manual carefully.

GAIN

Gain is the depth setting of the device. It is also used to eliminate the ambient electromag-

netic signals from the surrounding environment and noise signals transmitted from ground. 

NOTE:

 To obtain maximum depth performance, to eliminate the noise caused by  electro-

magnetic interference, try shifting the frequency first (F. Shift). If this is not sufficient, change 

the operating frequency of the device (5kHz/14kHz/20kHz) before lowering the gain.

Gain setting range is 01-99 and pre-defined for each mode. All modes start at default 

settings. They can be manually modified when necessary. Gain adjustment applies to the 

selected mode; the modified setting does not affect the gain setting of the other modes.

NOTE:

 If the ground is highly mineralized causing the device to overload, decrease the gain 

until the ''Overload'' message disappears from the screen.

Gain in General Search Modes (GEN and GEN (D))

In the GEN modes, gain setting causes an increase or decrease in the popping sounds and 

Discrimination (Disc.)

Disc. is the ability of the device to ignore all metals below a certain Target ID. In the Disc. 

process, the filtered ID range is shown with lines on the ID scale and every 2 consecutive 

IDs are represented with 1 line. For example, if you set the Disc. to 30, 15 lines will be shown 

between the 0-30 ID range on the scale and the device will not produce an audio response 

for any metals with IDs between 0-30.

Disc. setting is disabled for GEN (D) and STA (D) modes only. For all other modes, the factory 

default value will be displayed on screen at start up.

In order to change the Disc. value, select the Disc. option from the menu and decrease or 

increase the value using the plus (+) or minus (-) buttons. Please remember that certain 

targets, other than the ones you want to ignore, may also be missed or their signals may 

become weaker when using the Disc. setting.

In the case of receiving multiple IDs for the same target - let's say 35 and 55 - due to the  orien-

tation of the target or the composition of the metal itself, if you set the Disc. to 40, because 35 

will fall in the filtered range, the signal strength as well as the depth may diminish.

NOTE: Disc. setting works inversely proportional to depth up to level 15 in DI2, DI3, DI4, 

DI99 and COG modes and up to 49 in GEN, GEN (D), STA, STA (D), DEEP, VLX1 and VLX2 

modes. In other words, as the Disc. is increased up to the above mentioned levels, stabil-

ity will increase but depth will be reduced and vice versa. Above these levels though, 

both depth and noise will increase.

Iron Volume (Fe Vol.)

It adjusts or turns off the volume of the low iron tone. It can be adjusted between F0-F5 or 

n1-n5.

F0-F5:

 F5 is the maximum level. As you lower it, the audio response volume the device 

produces for ferrous metals will decrease. At F0 level, the iron audio will be silenced. In 

other words, the device will detect ferrous targets, the Target ID will be displayed on the 

screen but the device will not produce any audio response. 

n1-n5:

 This will enable you to get a low iron tone for your notched out target IDs instead 

of silencing them. n5 is the maximum level and the iron volume will be reduced as you go 

down but it cannot be silenced completely. 

Fe Vol. adjustment applies to the selected search mode only. The change does not affect the 

other modes.

Tracking

When tracking is active (01 position), the device continuously tracks the  changing ground 

structures and automatically reconfigures the ground balance setting. The invisible changes 

in ground affect the detection depth as well as the discrimination ability of the device so 

it is possible to operate the device at higher performance using this feature under suitable 

ground conditions. 

Please refer to page 9 for more information on Tracking.

When tracking is activated, ''Track'' will be displayed in the message section at the bottom 

of the screen.

NOTE:

 Tracking is recommended to be used in the GEN and GEN (D) modes only.

Brightness (Bright.)

It enables you to adjust display backlight level according to your personal preference. It 

ranges between 0-5 and C1-C5. At 0 level, the backlight is off. When set between 1-5, it lights 

up only for a short period of time when a target is detected or while navigating the menu 

and then it goes off. At C1-C5 levels, it will be continuously lit. The continuous operation of 

the backlight will affect power consumption, which is not recommended.

The backlight setting is restored to the final saved setting when the device is turned off and 

on again. This setting is common in all modes; change made in any mode also applies to the 

other modes.

Vibration (Vibrate)

This feature provides feedback to the user by producing a vibration effect when a target is 

detected. It can be used independently or together with the audio response. When audio 

response is disabled, all feedbacks are provided to the user as vibration only during target 

detection.

Vibration setting is adjusted within the range of 00-05. When it is switched to 0, vibration fea-

ture is completely disabled. If the vibration is at 01 level, the device provides long vibration 

signals and at 05 it provides short vibration signals. The magnitude of the vibration effect can 

vary according to the depth of the target and the swinging speed. This setting is common in 

all search modes (except for STA and STA (D)); change made in any mode also applies to the 

other modes. Vibration will not work in STA and STA (D) modes except when the device goes 

into overload.
Vibration may not be felt in the General Search modes (GEN and GEN (D)) with weak signals; 

it will be felt as the signal gets stronger. In other words, vibration does not start at the depth 

where the audio tones are heard but at a lesser depth. Therefore, if you are detecting with 

vibration only and audio tones are off, you can miss weaker and deeper signals.
Vibration speed is constant in the pinpoint mode and cannot be adjusted. Vibration is off 

at 0 position. 01-05 values provide the same level of vibration in the pinpoint mode. When 

vibration is used in the pinpoint mode, vibration speed increases as the target is approached 

and it reaches the maximum level over the center of the target.

The vibration setting is restored to the final saved setting when the device is turned off and 

on again. This setting is common in all modes; change made in any mode also applies to the 

other modes.

Led Flashlight (Light)

It is the headlight used for lighting the area you are scanning while detecting at night or in 

dark locations. LED flashlight does not operate when the device is off. It is recommended to 

turn it on only when necessary since its operation consumes extra battery power.

Frequency Shift (F. Shift)

It is used to eliminate the electromagnetic interference that the device receives from another 

detector which operates in the same frequency range nearby or from the surroundings. If 

too much noise is received when the search coil is lifted in the air, this may be caused by the 

local electromagnetic signals or excessive gain settings.

To eliminate the noise caused by  electromagnetic interference, try shifting the frequency 

first (F. Shift) before lowering the gain to obtain maximum depth performance . Frequency 

shift consists of 5 steps. Default setting is 03 which is the central frequency.

IMPORTANT!

 Frequency shift may impair performance. Therefore, it is suggested that you do 

not shift the frequency unless it is necessary. In cases where the interference cannot be elimi-

nated with the frequency shift, the operating frequency of the device ((5kHz/14kHz/20kHz) 

in the Expert Setting may also be changed.

Factory Default /Save (FD/Save)

With the FD/Save feature of the 

IMPACT

, you can save your settings or restore factory 

defaults. Save function saves all settings except for the ground balance, tracking and light. 

The device starts in the last mode where the save function was performed. 

To save your settings, select FD/Save on screen. Two dashes (--) will be displayed on screen. 

Push the right button. When ''SA'' is displayed, press the SELECT button once. You will see 

lines rotating in the GB window on the right side. When the saving is completed, the lines 

will stop rotating and the SA text will disappear.

To go back to factory defaults, select FD/Save on screen. Two dashes (--) will be displayed 

on screen. Push the left button. When ''Fd'' is displayed, press the SELECT button once. You 

will see lines rotating in the GB window on the right side. When the process is completed, 

the lines will stop rotating and the Fd text will disappear.

BASIC SETTINGS

Summary of Contents for Nokta

Page 1: ......

Page 2: ......

Page 3: ...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 IMPORTA...

Page 4: ...ETTINGS 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 ROCK...

Page 5: ...ble 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 re...

Page 6: ...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 Headp...

Page 7: ...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 a...

Page 8: ...ion 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 pinpo...

Page 9: ...t of the shaft so that you are standing in an upright position your arm is relaxed and the search coil is approximately 5cm 2 above the ground It is important to keep the search coil parallel to the g...

Page 10: ...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...

Page 11: ...mps 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 lo...

Page 12: ...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...

Page 13: ...d balance While tracking is active the device can initially produce a loud signal when it detects a different ground structure for instance a mineral rock or a target In this case swing the search coi...

Page 14: ...ly composite soil structure a ground balance should be performed again to adapt to the varying soil structure In addition re ground balancing is recommended if you change the operating frequency of th...

Page 15: ...ill 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 Tables outlining the search modes and ID ranges as well as th...

Page 16: ...to the signal strength The threshold in this mode is internal and cannot be adjusted by the user Changes in the ground and temperature may lead to drifts in the threshold Threshold drifts will be ref...

Page 17: ...ls with 0 20 ID and a higher tone for all targets with 21 99 ID Upon target detection the threshold will momentarily go silent and only the target audio response will be heard The duration of the thre...

Page 18: ...e Discrimination DI4 4 tone discrimination mode designed for coin hunting in low medium mineralization Due to its high gain and depth this mode is a bit noisier than the other modes Noise will be more...

Page 19: ...ly noisier Noise will be more in the air versus in the ground Take this fact into consideration when adjusting the gain level While searching in this mode a slower swing speed is required The discrimi...

Page 20: ...t back to the modes window NOTE You can go from basic settings to expert settings directly simply by pressing the EXPERT button However you cannot go from expert settings back to basic settings direct...

Page 21: ...d more if the coil is in free air than sweeping the coil on the ground Please keep this factor in mind while adjusting the gain Gain in Static Modes The factory default for the gain setting is optimiz...

Page 22: ...GEN GEN D STA STA D DEEP VLX1 and VLX2 modes In other words as the Disc is increased up to the above mentioned levels stabil ity will increase but depth will be reduced and vice versa Above these lev...

Page 23: ...provides short vibration signals The magnitude of the vibration effect can vary according to the depth of the target and the swinging speed This setting is common in all search modes except for STA a...

Page 24: ...shift the operating frequency of the device 5kHz 14kHz 20kHz in the Expert Setting may also be changed Factory Default Save FD Save With the FD Save feature of the IMPACT you can save your settings o...

Page 25: ...plus and minus buttons are used The cursor blinks while it is moving on the scale When you are on the first ID that you want to reject press the SELECT button once This ID is now rejected and it is sh...

Page 26: ...use the Tone Break feature first select this setting from the Expert Settings The names of the metal groups mentioned above will appear at the bottom of the screen The Tone Break point of the metal gr...

Page 27: ...lowly for a deeper detection iSAT consists of 10 levels The device will start at level 6 It is recommended that iSAT should be increased in high mineralization and decreased in low mineralization iSAT...

Page 28: ...IMPACT offers 3 operating frequencies 5kHz 14kHz and 20kHz to suit different target and soil types Based on the frequency selected the detector s detection performance for different types of targets...

Page 29: ...in pitch and volume as the search coil approaches the target In this mode the device does not discriminate or give target IDs If the device is in the vibration mode the speed of vibration will increa...

Page 30: ...starts to generate a continuous sound which resembles a siren Overload message is shown on the display simultaneously In such a case lift the search coil up until the message disappears FALSE SIGNALS...

Page 31: ...sitive based on their ID being low or high in com parison to the ID of the soil they are in One or both of the types may be present in a field The negative and positive effects mentioned here will onl...

Page 32: ...is a slight delay in tracking you may hear a strong signal at the first one or two swings until the setting is adjusted Then the sound will get weaker and disappear This will not happen with metal tar...

Page 33: ...l lose metals along with rocks If the hot rocks in your search area tend to give high IDs then the chances of missing the signals of small metals underneath will be high as well SEARCHING IN SHALLOW W...

Page 34: ...ground balancing It does not indicate any error or problem It only indicates what should be done Check Coil It indicates an interruption in the search coil transmitter signal The search coil connecto...

Page 35: ...ne Break Notch Filter Ground Balance Pinpoint Frequency Shift Vibration Gain Setting Target ID Search Coil Display Backlight LED Flashlight Weight Length Battery Warranty VLF 5kHz 14kHz 20kHz 150 Hz 7...

Page 36: ...4 89 1928 Six Pence 55 72 79 30 53 62 1868 Six Pence 74 84 85 55 74 79 1842 Four Pence 68 83 84 49 69 75 1952 Three Pence 74 84 85 56 74 80 IMPORTANT If you are using the Normalized ID scale the devic...

Page 37: ...03 x 03 x 03 x 03 x 03 x 03 x 03 x 03 x 03 FD Save Fd SA x x x x x x x x x x x x EXPERT Notch Filter 00 99 x 03 x 03 x 03 x 03 x 10 x 15 x 00 x 00 Audio Tone 15 70 x 33 x 33 x 15 33 x 15 33 64 x 15 33...

Page 38: ...x x x x x x x x x x x x x x x x WET BEACH SAND x x PARKS TRASHY SITES x x x x x x x x x x x x x x x x x x TARGET 5kHz 14kHz 20kHz 5kHz 14kHz 20kHz 5kHz 14kHz 20kHz 5kHz 14kHz 20kHz 5kHz 14kHz 20kHz 5k...

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