Nokta Legend Metal Detector User Manual

Legal Disclaimers & Warnings

Users must comply with applicable laws and regulations governing metal detector use. Do not use the detector in protected or archeological sites, or in restricted military zones without authorization. Notify authorities of any significant artifacts found.

The LEGEND is an advanced electronic device. Read this manual before assembly or operation. Avoid storing the device and search coil under extreme temperatures (-20°C to 60°C / -4°F to 140°F).

The device is IP68 rated for waterproofing up to 3 meters (10ft), excluding Bluetooth® headphones. After use in salty water, rinse the system box, shaft, and coil with tap water, ensuring connectors are salt-free. Do not use chemicals for cleaning. Wipe the screen and shaft dry with a soft, non-scratch cloth.

Protect the detector from impacts. For shipping, use original packaging with shock-resistant materials.

The LEGEND metal detector may only be disassembled and repaired by Nokta Authorized Service Centers. Unauthorized repairs void the warranty.

Important: Do not use the device indoors as it may give false signals due to the presence of metals. Use outdoors in open fields. Keep other detectors or electromagnetic devices at least 10m (30ft) away. Avoid carrying metal objects and keep the device away from shoes, as these can be detected as targets.

Assembly

Follow these steps to assemble the Nokta Legend metal detector:

1. Attach the lower shaft to the search coil using the provided screw and nut. Do not overtighten.
2. Connect the middle rod to the upper and lower rods by opening and closing the lever latches. Adjust the shaft length for comfortable use and secure the latches.
3. Wind the search coil cable around the shaft without stretching. Plug the connector into the system box input socket and secure the nut. You may hear clicks indicating a secure connection.
4. To adjust the armrest, remove the screws, slide the armrest to the desired position, align the holes, and retighten the screws. A spare screw can be attached to an empty hole.
5. Insert the armrest strap and adjust it to fit your arm securely.

Introduction to the Device

The Nokta Legend features several components:

• 1. LCD Screen: Displays all information.
• 2. Power & Settings Button: Press for 1 second to turn on/off. Press once to enter/exit settings. Holding it while in settings will not turn off the device.
• 3. Pinpoint & Accept/Reject Button: Used for pinpointing and other functions in discrimination and settings.
• 4. Frequency Button: Selects operating frequency (Multi and single frequencies).
• 5. Discrimination Button: Navigates through discrimination patterns.
• 6. Right and Left Buttons: Navigate modes and settings.
• 7. Plus (+) and Minus (-) Buttons: Adjust sensitivity on the main screen; change values in settings.
• 8. Ground Balance Button: Initiates ground balancing (Automatic, Manual, Tracking).
• 9. Speaker: Audio output.
• 10. LED Flashlight: Provides illumination.
• 11. Search Coil Input Socket: Connects the search coil.
• 12. Wired Headphones and Charging Input Socket: For wired headphones and charging. Keep the cap closed when not in use.

Display Overview

The LCD screen provides the following information:

• 1. Info Bar: Displays icons for active features.
• 2. Clock and Time Tracking: Shows current time and usage duration.
• 3. Search Modes: Indicates the selected search mode (Park, Field, Beach, Goldfield).
• 4. Target ID Scale and Notched Out IDs: Shows the target's conductivity range and rejected IDs.
• 5. Operating Frequency: Displays the current frequency.
• 6. Sensitivity Indicator: Shows the current sensitivity level.
• 7. Target ID: Displays the target's identification number.
• 8. Depth Indicator: Estimates the target's depth.
• 9. User Profile Save & Delete: Manages user profiles.
• 10. FerroCheck™ Bar: Shows the ferrous/non-ferrous ratio of a target.
• 11. Pinpoint: Indicates pinpoint mode is active.
• 12. Settings: Accesses the settings menu.
• 13. Sub-settings: Indicates sub-menu navigation.

Battery Information

The LEGEND features an internal 5050mAh Lithium Polymer battery with a runtime of 8-20 hours, depending on usage factors like frequency, audio, backlight, and LED flashlight.

Charging: Charge the device before first use. A full charge takes approximately 3-4 hours. Use a 5V 2A USB power adapter. Charging via a PC USB port may take longer.

Waterproof Replaceable Spare Battery: Available in the Pro Pack or separately. It can be used when the internal battery is depleted and charging is not possible. Note: The spare battery does not allow connection of wired headphones.

Operating with a Powerbank: The device can be powered and charged via a powerbank using the supplied cable. Do not use the detector underwater while connected to a power bank.

Warnings: Avoid extreme temperatures. Do not charge the battery above 35°C (95°F) or below 0°C (32°F). Battery replacement must be done by authorized service centers.

Correct Use

Shaft Height: Adjust the shaft so you stand upright with a relaxed arm, and the search coil is approximately 5cm (2 inches) above the ground.

Correct Way of Sweeping: Keep the search coil parallel to the ground at all times for accurate results. Avoid incorrect coil angles and sweeping motions.

Quick Guide

1. Assemble the device as per the instructions.
2. Press and hold the [Power/Settings Button] to turn on the device. The software version will appear on screen.
3. The device starts in Park mode and Multi frequency. Modes can be changed based on ground conditions.
4. Increase sensitivity for greater depth, but lower it if excessive noise occurs.
5. Begin detecting.

Common and Mode-Based Settings

Some settings are common to all modes (affecting all modes), while others are mode-based (affecting only the selected mode). Common settings are marked with a universal icon, while mode-based settings are marked with mode-specific icons (Park, Field, Beach, Goldfield).

Common Settings:

• Sensitivity
• Volume
• Backlight
• Vibration

Mode-Based Settings:

• Custom Discrimination Pattern
• Ground Balance
• Frequency
• Frequency Shift
• Recovery Speed
• Iron Filter / Stability / Bottle Cap Rejection / Ground Suppressor
• Audio Gain
• Number of Tones
• Tone Volume
• Tone Frequency
• Tone Break
• Threshold Level
• Threshold Frequency

Search Modes

The LEGEND offers four search modes:

• Park: Optimized for coin and jewelry hunting in urban areas with modern trash. Default discrimination rejects IDs 1-11. Supports all frequencies.
• Field: Recommended for coin and relic hunting in fields with ferrous trash and coke. Default discrimination rejects IDs 1-11. Supports all frequencies.
• Beach: Optimized for dry, wet, and underwater use (up to 3m/10ft). Requires Multi frequency (MW or MD options). Handles salt-induced noise.
• Goldfield: Optimized for mineralized goldfields, detecting small and large gold nuggets. Supports higher single frequencies (20kHz, 40kHz) and Multi frequency. Features a continuous threshold tone.

Navigating Modes: Use the [Right/Left Buttons] to switch between modes. The selected mode is highlighted.

Frequency: Multi frequency (M) is recommended for most conditions. Single frequencies (e.g., 4kHz, 10kHz, 20kHz, 40kHz) can be advantageous for specific targets or to reduce noise in certain environments. Beach mode requires Multi frequency. Goldfield mode restricts lower single frequencies.

Target ID Resolution: ID resolution differs between Park and Field modes for IDs 11-15.

Multi Frequency Options: Park and Field modes offer M1, M2, M3. M1 is sensitive to higher conductors, M2 to lower conductors, and M3 is ideal for humid/conductive soils.

Black Sand: The Beach mode automatically detects black sand and displays a warning icon.

Sensitivity

Sensitivity adjusts detection depth and helps eliminate ambient electromagnetic signals and ground noise. It ranges from 1 to 30. Set sensitivity to the highest level without excessive noise for optimal performance.

Adjusting Sensitivity: Use the [Plus/Minus Buttons] on the main screen. The sensitivity indicator shows levels 1-5, with each level representing 6 units of sensitivity.

Important: Shifting frequency first can help reduce noise before adjusting sensitivity.

Target Depth

The device estimates target depth based on signal strength, displayed in 5 levels. Depth is calibrated for a 2.5cm (1-inch) coin; actual depth varies with target size.

Note: Operating frequency affects estimated depth.

Mute Function

Press and hold the [Frequency Button] to mute the device. 'AO' (Audio Off) will appear. Press and hold again to unmute. The device will automatically unmute in certain menus.

Frequency

The LEGEND supports Multi frequency (M) and five single frequencies (4kHz, 10kHz, 15kHz, 20kHz, 40kHz). Multi frequency offers broad target coverage and better depth/separation, especially in wet beach sand. Single frequencies can be useful for specific targets or in noisy environments.

Beach Mode: Exclusively uses Multi frequency (MW for wet/underwater, MD for dry sand). Single frequencies are not supported.

Goldfield Mode: Supports higher single frequencies (20kHz, 40kHz) and Multi frequency, optimized for mineralized ground.

Multi Frequency Types: M1 (higher conductors), M2 (lower conductors), M3 (humid/conductive soils).

Target ID and Frequency: Lower frequencies generally provide better results for larger, high-conductive targets, while higher frequencies are better for smaller, low-conductive targets.

Target ID

Target ID numbers (01-60) indicate target conductivity. Ferrous targets typically range from 1-10, non-ferrous from 11-60. Target IDs can vary due to orientation, depth, purity, corrosion, and ground mineralization. The device may sometimes fail to provide an ID for targets at fringe depths or smaller targets.

Target IDs are estimates; actual identification requires digging. Gold targets may have IDs similar to trash items like iron or foil.

Important: Larger targets may register higher IDs than expected.

Discrimination Patterns

The LEGEND offers four discrimination patterns:

• All Metal (A): Accepts all IDs (1-60).
• Ground Off (G): Rejects IDs 1-2.
• Ferrous Off (F): Rejects ferrous targets (IDs 1-10). This is the default for Park, Field, and Beach modes.
• Custom (C): Allows users to create personalized rejection/acceptance patterns. This is the default for Goldfield mode (Ground Off).

Note: Discrimination settings are mode-specific.

Automatic Notching: Swing the coil over a target to reject or accept its ID. Use the [Pinpoint/Accept Button]. Sensitivity temporarily drops to 5; press [Ground Balance Button] to restore current sensitivity.

Forming a Customized Pattern (Notch): Press and hold the [Discrimination Button] to enter the menu. Use [Right/Left Buttons] to select IDs and [Pinpoint/Accept Button] to toggle them. Sensitivity drops to 5.

Ground Balance

Ground balancing optimizes depth and stability, especially in mineralized ground. It can be performed automatically, manually, or via tracking.

Automatic Ground Balance: Find a metal-free spot. Press and hold the [Ground Balance Button]. Pump the coil smoothly 15-20cm (6-8 inches) above the ground down to 3cm (1 inch) off the ground until the ground response audio is minimized. Repeat 2-3 times to ensure consistency.

Manual Ground Balance: Enter the ground balance screen by pressing the [Ground Balance Button] once. Listen to the ground response while pumping the coil. Use [Plus/Minus Buttons] to adjust the ground balance value until the response is eliminated.

Ground Tracking: Activates automatic ground balance adjustment during detection. Press [Ground Balance Button] once, then [Pinpoint/Accept Button] once to activate. The device continuously updates the ground balance.

Note: Ground balance values may differ between single and Multi frequencies, and between Beach MW/MD options.

Pinpoint

Pinpoint mode allows precise location of a target. Unlike motion detection, the signal remains when the coil is stationary. Press the [Pinpoint/Accept Button] to enter pinpoint mode. The device does not discriminate or provide Target IDs in this mode.

To Perform Pinpoint: After detecting a target, move the coil aside and press the [Pinpoint/Accept Button]. Slowly bring the coil closer to the target. The sound will get stronger and change pitch as you approach the center. Mark the loudest point. Repeat from different directions for accuracy.

FerroCheck™

FerroCheck™ graphically displays the ferrous/non-ferrous ratio of a target, aiding in identification beyond Target ID. It works best with shallower targets receiving a strong signal.

Usage: Sweep the coil widely over the target from different angles. More than 2 bars on the ferrous side indicate an alloy with iron content.

Ferrous Target: Shows 100% ferrous on both Target ID and FerroCheck™.

True Non-Ferrous Target: Shows 100% non-ferrous on both Target ID and FerroCheck™.

False Non-Ferrous Target: May show a non-ferrous ID but is identified as alloy with iron content by FerroCheck™.

Mineralization Indicator

Ground mineralization (iron particles or salt) can cause false signals. Access the mineralization indicator by pressing the [Discrimination Button] while in the ground balance menu. 'GI' indicates Ground Indicator, 'FC' indicates FerroCheck™.

The indicator bar shows iron mineralization on the left and salt mineralization on the right (works in Multi frequency only).

Settings

Access the settings menu by pressing the [Power & Settings Button] once. Navigate settings using [Right/Left Buttons]. Adjust values using [Plus/Minus Buttons]. Press [Power & Settings Button] again to exit.

Frequency Shift

Eliminates electromagnetic interference. Offers 13 channels. Can be set manually (operator selects channel) or automatically (device scans for the quietest channel).

Recovery Speed

Adjusts target response speed for separating targets in close proximity. Ranges from 1 (slow, deeper targets) to 10 (fast, better separation). Affects depth inversely.

Iron Filter (IF)

Helps detect non-ferrous targets masked by iron. Ranges from 0-9 (Park, Field, Goldfield) or 1-9 (Beach). Level 9 can discriminate mid-conductors like shotgun cartridges.

Stability for Iron Filter (St)

Fine-tunes the Iron Filter. Ranges from 1-5. Inactive when IF is 8 or 9 in Park, Field, Goldfield modes.

Stability in Beach Mode

Minimizes ground noise and false signals on beaches. Ranges from 1-5. Higher stability may reduce detection of low-conductive targets like gold.

Bottle Cap Rejection (bC)

Discourages bottle cap detection by treating them as iron. Ranges from 0-8. Works in Multi frequency only.

Ground Suppressor (GS)

Eliminates false ground signals in tough terrains. Ranges from 0-8. Recommended to use only when needed.

Volume

Adjusts the device's volume level (0-6). Affects power consumption. Wired headphone volume is also adjusted here.

Audio Gain (AG)

Increases the volume of weak target responses. Does not increase depth.

Tone Settings

Allows customization of audio feedback for targets. Includes Number of Tones, Tone Volume, Tone Frequency, Tone Break, Threshold Level, and Threshold Frequency.

• Number of Tones: Divides the Target ID scale into zones (1, 2, 4, 6, 60, or P-Tone Pitch) for different audio responses. Goldfield mode is fixed at 1 tone.
• Tone Volume: Adjusts the volume for each tone zone.
• Tone Frequency: Adjusts the frequency for each tone zone to help distinguish targets. Lower frequencies for ferrous, higher for non-ferrous.
• Tone Break: Moves the points separating target zones.
• Threshold Level: Sets a continuous background hum to make weak signals more audible. Ranges from 0-30. Adjust to a level where slight audio variations are still audible.
• Threshold Frequency: Adjusts the frequency of the background hum. Ranges from 1-30.

User Profile

Save custom settings for different locations or targets in 4 user profiles. Access saved settings quickly. User profile 1 is the default. Changes made while an active profile is selected are saved automatically.

Resetting User Profile: Select the profile, then the reset icon, and press/hold the [Pinpoint/Accept Button].

Reverting to Factory Defaults: In the settings menu, select User Profile, then press and hold the [Pinpoint/Accept Button] until 'Fd' appears.

Backlight

Adjusts display backlight level (0-6 or A1-A6). A1-A6 levels provide temporary illumination.

Vibration

Provides tactile feedback when a target is detected (0-5). Can be used independently or with audio.

LED Flashlight

Provides illumination for dark conditions. Can be turned on/off (0 or 1). Consumes battery power.

Bluetooth®

Enables wireless connection to Bluetooth® headphones. Can be turned on/off (0 or 1). The device searches for previously paired headphones.

Clock

Displays the current time. Can be set to 12-hour or 24-hour format.

Time Tracking

Records and displays the device's total usage time (year/month/day/hour).

Warning Messages

CC (Check Coil): Indicates a search coil connection issue or defect.

Lo (Low Battery): Battery is depleted.

SE (System Error): Device malfunction. Try resetting or contact service.

Software Update

The device supports software updates. Check the product's web page for instructions. The software version is displayed at startup.

Headphones

Comes with Bluetooth® wireless headphones (not waterproof). For underwater use with the system box submerged, Nokta Waterproof Headphones or Nokta Koss Headphones with waterproof connector are recommended. An adapter is available for using other wired headphones.

Technical Specifications

Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. Qualcomm® aptX™ is a product of Qualcomm Technologies, Inc.

Nokta Detectors reserves the right to change specifications without notice.