1. Introduction
The TECLUNG GT620G is an automated metal detector designed for hobbyists and enthusiasts to search for coins, relics, jewelry, gold, and silver. Its versatile design and ease of use make it suitable for various metal detection activities, including detecting aluminum, copper, and other hidden metals. This manual provides detailed instructions for assembling, operating, and maintaining your metal detector to ensure optimal performance.
2. Package Contents
Please check the package to ensure all items are present:
- 1x Metal Detector Main Unit (Control Box with LCD display)
- 2x Connecting Rods
- 1x Armrest
- 1x Waterproof Search Coil (20cm diameter)
- 1x User Manual (English)
3. Product Components
Familiarize yourself with the main parts of your metal detector:
- Search Coil: The part that detects metal objects. It is waterproof.
- Lock Nut: Secures the search coil to the stem and adjusts its angle.
- Control Box: Houses the electronics, LCD screen, and control buttons. Note: The control box is NOT waterproof.
- LCD Screen: Displays detection information, operating mode, sensitivity, and battery status.
- Hand Grip: Provides a comfortable hold during operation.
- Arm Support: Helps distribute the detector's weight for comfortable use.
- Adjustable Stem: Allows adjustment of the detector's length (78-110cm).
- Earphone Jack: For connecting headphones (not supplied) for private listening to detection signals.
4. Assembly Instructions
Follow these steps to assemble your metal detector:
- Attach Search Coil: Tighten the nut on the search coil bolt and pass it through the connection rod.
- Connect Stems: Join the middle stem and bottom stem together. Adjust the length of the stem to your preference and firmly lock the nut.
- Mount Control Box: Align the control box with the S-shape rod and screw it tightly.
- Connect Search Coil Cable: Wind the search coil cable around the stem, then insert the signal cable into the back of the control box.
5. Initial Setup
5.1 Battery Installation
The GT620G operates on two 9V alkaline batteries (not supplied). Insert them into the battery compartment located on the control box, ensuring correct polarity.
5.2 Adjusting Length
Adjust the telescopic stem to a comfortable length that allows the search coil to be parallel to the ground when you are standing upright.
6. Operating Modes
The GT620G features two primary operating modes:
- ALL METAL Mode: This mode allows you to search for all types of metal without discrimination. It features auto ground balance and high sensitivity, making it ideal for general metal detection.
- DISC (Discrimination) Mode: This mode allows you to discriminate between different types of metals. By adjusting the 'TARGET X REJECT' button, you can exclude unwanted metals (like iron) from detection.
7. Operation
7.1 Power On and Sensitivity Adjustment
To begin, open the green power button. Adjust the sensitivity using the 'DEPTH SELECT' button to a level of 2-3. This sets the detector to 'All Metal' mode initially.
7.2 Metal Discrimination
To discriminate and exclude specific metals:
- Press the 'TARGET X REJECT' button once to easily discriminate and exclude iron.
- Press the 'TARGET X REJECT' button a second time to eliminate copper coins from detection.
7.3 Search Environment
The GT620G is suitable for various environments, including field exploring, detecting metals, beach detection, and finding coins.
8. Maintenance
8.1 Cleaning
- After each use, wipe down the search coil and stem with a damp cloth to remove dirt and debris.
- Ensure the search coil is dry before storing.
- The control box should be kept dry and clean. Use a soft, dry cloth to wipe it.
8.2 Storage
- Always remove batteries if the detector will not be used for an extended period to prevent leakage and damage.
- Store the metal detector in a cool, dry place, away from direct sunlight and extreme temperatures.
8.3 Waterproof Search Coil
The search coil is waterproof and can be submerged in shallow water. However, the control housing is not waterproof and must be kept dry at all times.
9. Troubleshooting
- No Power: Check if the batteries are correctly installed and fully charged. Replace with new 9V alkaline batteries if necessary.
- No Detection: Ensure the search coil cable is securely connected to the control box. Adjust sensitivity settings.
- False Signals: Reduce sensitivity. Ensure you are not operating near strong electromagnetic interference.
- LCD Display Issues: If the display is dim or erratic, check battery levels.
10. Specifications
| Feature | Detail |
|---|---|
| Model | GT620G |
| Power Type | Battery-Powered (2 x 9V alkaline batteries, not supplied) |
| Frequency | 5.0 KHz |
| Sensitivity | US 25 cents: 150-180mm |
| Display Mode | LCD Automated display |
| Sound Mode | Sound Recognition Metal |
| Telescopic Length | 78-110cm (30.7-43.3 inches) |
| Detector Diameter (Search Coil) | Waterproof coil 20cm (7.87 inches) |
| Product Weight | 1.3kg |
| Certification | CE |
| Origin | Mainland China |
11. User Tips
- For best results, sweep the search coil slowly and steadily over the ground.
- Use headphones to better hear subtle detection signals, especially in noisy environments.
- Experiment with different sensitivity and discrimination settings to understand how the detector responds to various metals and ground conditions.
12. Warranty and Support
12.1 Warranty
This product comes with a 12-month warranty from the date of purchase. If the item is defective within 1 month due to a product reason, a replaced spare part will be sent without extra charge, or a refund will be offered after the defective item is received. If the item is defective after 1 month, you may still send it back for free repair, but you will be responsible for the shipping costs.
12.2 Returns
If you are not satisfied with the product upon receipt, you may return it within 10 days for a replacement or money back. Please contact customer support before initiating a return.
