1. Introduction
Thank you for choosing the TECLUNG GT860 Underground Metal Detector. This manual provides detailed instructions for the assembly, operation, maintenance, and troubleshooting of your new device. Please read this manual thoroughly before using the detector to ensure safe and optimal performance.
The GT860 is designed for outdoor use, featuring an upgraded DSP chip, adjustable discrimination, and a large LED display for efficient metal detection, including gold, silver, copper, and iron.
2. Package Contents
Before assembly, please verify that all components are present:
- GT860 Control Unit with Armrest
- Adjustable Telescopic Rod
- 10-inch IP68 Waterproof Search Coil
- Search Coil Connecting Cable
- Fasteners for assembly
- Instruction Manual (this document)
Note: 2 x 9V batteries are NOT included and must be purchased separately.
3. Assembly Instructions
Follow these steps to assemble your GT860 metal detector:
- Attach the Armrest: Secure the armrest to the upper part of the telescopic rod.
- Connect the Control Unit: Slide the control unit onto the telescopic rod and secure it in place. Ensure it is firmly attached.
- Install Batteries: Open the battery compartment on the control unit and insert two 9V batteries, observing the correct polarity. Close the compartment securely.
- Attach the Search Coil: Connect the 10-inch search coil to the lower end of the telescopic rod using the provided fasteners.
- Connect Search Coil Cable: Wrap the search coil cable around the telescopic rod and plug the connector into the corresponding port on the control unit. Ensure a snug fit to prevent interference.
- Adjust Length: Adjust the telescopic rod to a comfortable length for your height. The detector's length is adjustable from 102cm to 133cm (40.16 inches to 52.36 inches).
Figure 3.1: Fully assembled GT860 Metal Detector.
Figure 3.2: Diagram illustrating the adjustable length of the detector from 102cm to 133cm.
4. Operating Instructions
Familiarize yourself with the control panel and operating modes for effective metal detection.
4.1 Control Panel Overview
Figure 4.1: Close-up of the GT860 control panel and LED display.
The control unit features a 3-inch x 2.2-inch HD LED display and several buttons:
- Power Button: Turns the detector ON/OFF.
- SENS (Sensitivity) Button: Adjusts the detection sensitivity. Use Up/Down arrows to change levels.
- PP (Pinpoint) Button: Activates pinpoint mode for precise target location.
- MODE Button: Cycles through the five recognition modes.
- Up/Down Arrows: Navigate menus, adjust sensitivity, or change discrimination settings.
- Volume Control: Adjusts the audio alarm volume.
4.2 Operating Modes
The GT860 offers five distinct operating modes:
- Full Metal Mode: Detects all types of metal without discrimination. Ideal for general searching or when you don't want to miss any targets.
- DISC (Discrimination) Mode: Allows you to eliminate unwanted metals (e.g., iron trash) from detection. Use the Up/Down arrows to adjust the discrimination range.
- Memory Mode: Stores and recalls specific discrimination patterns.
- Jewelry Mode: Optimized for detecting small precious metals like rings, earrings, and other jewelry.
- PINPOINT Mode: Once a target is detected, press the PP button to narrow down its exact location for easier recovery.
4.3 Detection Process
- Power On: Press the Power button to turn on the detector.
- Select Mode: Use the MODE button to choose your desired detection mode (e.g., DISC mode to filter out iron).
- Adjust Sensitivity: Press SENS and use the Up/Down arrows to set the sensitivity. Start with a moderate level and increase if needed, being mindful of false signals from ground mineralization.
- Sweep the Search Coil: Hold the detector comfortably and sweep the search coil slowly and steadily from side to side, keeping it parallel to the ground and about 1-2 inches above the surface.
- Identify Target: When a metal object is detected, the LCD display will show an alarm indication, and an audible tone will sound. The display will also provide numerical identification for different metals (Ferrous, Gold, Non-Ferrous, Silver) and an estimated depth.
- Pinpoint Target: Once a target is indicated, press the PP button to pinpoint its exact location. Move the coil slowly over the area until the strongest signal is heard/seen, indicating the center of the target.
Figure 4.2: Illustration of the detector identifying different metal types (Gold, Silver, Copper, Iron) and indicating depth.
5. Maintenance
- Cleaning: After each use, wipe down the detector with a damp cloth to remove dirt and debris. Do not use abrasive cleaners or solvents.
- Search Coil: The 10-inch search coil is IP68 waterproof and can be submerged in water. However, the control unit is NOT waterproof. Avoid submerging the control unit.
- Battery Care: Remove batteries if the detector will not be used for an extended period to prevent leakage and damage.
- Storage: Store the detector in a cool, dry place, away from extreme temperatures and direct sunlight.
- Cable Inspection: Regularly check all cables and connections for signs of wear or damage.
6. Troubleshooting
- No Power:
- Check if batteries are correctly installed with proper polarity.
- Replace old batteries with fresh 9V batteries.
- False Signals/Chatter:
- Reduce sensitivity.
- Ensure the search coil cable is tightly wound around the shaft and securely connected.
- Move away from power lines, fences, or other sources of electromagnetic interference.
- Perform ground balance if available (not explicitly mentioned for this model, but a general tip).
- Poor Detection Depth:
- Increase sensitivity.
- Ensure the search coil is swept parallel to the ground and close to the surface.
- Check battery levels; low batteries can affect performance.
- Display Not Working:
- Check battery connection and power.
- Ensure the unit is not exposed to extreme temperatures.
7. Specifications
| Feature | Specification |
|---|---|
| Model | GT860 |
| Display | 3" x 2.2" HD LED Display, Backlit |
| Search Coil | 10-inch, IP68 Waterproof |
| Detection Modes | Full Metal, DISC, Memory, Jewelry, PINPOINT |
| Sensitivity | ≥ 18cm / 7.1 inches (for US 25 cent coin, in air) |
| Alarm Indication | LCD indication and Sound indication |
| Working Current | Quiescent: ≤ 23mA; Dynamic: ≤ 50mA |
| Power Supply | 2 x 9V batteries (not included) |
| Adjustable Length | 102cm - 133cm (40.16" - 52.36") |
| Color | Blue & Black |
| Material | Plastic |
| Package Dimensions (L x W x H) | 20cm x 15cm x 8cm |
| Package Weight | 1.422 kg |
8. User Tips
While no specific user reviews or Q&A were provided for this model, here are some general tips for metal detector users:
- Practice: Spend time in a known area (like your backyard) with various metal objects to get familiar with the detector's responses to different targets and depths.
- Slow Sweeping: Always sweep the coil slowly. Rushing can cause you to miss targets.
- Overlap Sweeps: Ensure each sweep slightly overlaps the previous one to cover the ground thoroughly.
- Headphones: Using headphones can help you hear subtle target signals that might be missed otherwise, especially in noisy environments.
- Battery Life: Always carry spare batteries, especially for longer detecting sessions.
- Environmental Factors: Be aware that highly mineralized ground can cause false signals. Adjust sensitivity or use discrimination to mitigate this.
9. Warranty and Support
For any questions, technical support, or warranty inquiries regarding your TECLUNG GT860 metal detector, please contact the seller directly through the platform where you made your purchase. Provide your order number and a detailed description of the issue for prompt assistance.
The seller's store name is "CharlotteT's Store".
