TX850L Metal Detector User Manual

1. Introduction

The Tianxun TX-850L is an advanced long-range metal detector designed for efficient treasure hunting and metal detection. It incorporates exclusive Target ID technology and patented discrimination features, making it suitable for both experienced users and beginners. Its robust design includes an 11-inch Double-D waterproof search coil, ensuring optimal performance across various terrains, including highly mineralized soils and shallow water environments. With its one-touch operation, the TX-850L is user-friendly and ready for immediate use after a simple setup.

2. Key Features

• Target ID Technology: Features two indicator scales for discrimination settings and target analysis.
• Enhanced Iron Resolution: Improves separation of desirable targets from iron junk in cluttered areas.
• Waterproof Search Coil: Equipped with an 11" DD elliptical search coil, allowing for detection in wet conditions and shallow water.
• One-Touch Operation: Simple power-on and ground mineral adjustment for immediate use.
• Adjustable Stem: Allows for comfortable use by users of varying heights.
• Human Mechanics Handle: Ergonomically designed for easy, anti-slip grip.
• Detector Stand: Prevents damage when placing the detector on the ground.
• Deep Detection Capability: Designed for detecting metals at significant depths.

3. Specifications

4. Setup and Assembly

Your TX-850L metal detector is designed for easy assembly. Follow these steps to get started:

1. Attach the Search Coil: Connect the 11" DD waterproof search coil to the lower stem using the provided bolt and nut. Ensure it is securely fastened but allows for slight angle adjustment.
2. Connect the Stems: Slide the lower stem into the middle stem, and then the middle stem into the upper stem (which has the control box and armrest). Adjust the length to a comfortable position using the locking collars.
3. Mount the Control Box: Secure the control box assembly to the upper stem. Ensure all cables are routed neatly along the stem and secured with clips or Velcro straps to prevent tangling during use.
4. Install Batteries: Open the battery compartment, typically located on the control box or under the armrest. Insert two 9V batteries, ensuring correct polarity. Close the compartment securely.
5. Adjust Armrest: Position the armrest for comfort, ensuring your forearm fits snugly to support the detector's weight.
6. Connect Search Coil Cable: Plug the search coil cable into the designated port on the control box. Tighten any locking rings to ensure a secure, waterproof connection.

5. Operating Instructions

The TX-850L features intuitive controls for effective metal detection. Familiarize yourself with the control panel:

5.1. Power On/Off

• Turn the POWER/GAIN knob clockwise to power on the detector. The LCD screen will illuminate.
• Turn the POWER/GAIN knob counter-clockwise until it clicks to power off.

5.2. Adjusting Gain (Sensitivity)

• The GAIN control adjusts the detector's sensitivity to targets. Higher gain increases detection depth but can also increase sensitivity to ground mineralization and electrical interference.
• Start with a moderate gain setting and increase it gradually if needed, ensuring stable operation.

5.3. Discrimination Mode (DISC MODE)

• Rotate the DISC MODE knob to adjust the discrimination level. Lower settings will detect more types of metal, while higher settings will filter out common junk metals like iron.
• The LCD's Lower Scale indicates the current discrimination setting.

5.4. Threshold

• The THRESHOLD control sets the constant background hum. Adjust it to a faint, barely audible hum.
• A stable threshold allows for easier detection of faint target signals.

5.5. Ground Balance (GND BAL)

• Ground balance is crucial for eliminating false signals caused by ground mineralization.
• Press and hold the GG PIN POINT button and pump the search coil up and down over a clear patch of ground.
• Adjust the GROUND BALANCE controls (left/right arrows) until the sound is stable or minimal.
• The LCD's GND BAL reading indicates the current ground balance setting.

5.6. Pinpoint Mode (GG PIN POINT)

• Once a target is detected, press and hold the GG PIN POINT button to activate pinpoint mode.
• Sweep the coil slowly over the target area to narrow down its exact location. The detector will provide a continuous tone and visual indication on the LCD as you center over the target.

5.7. Search Techniques

• Sweep the search coil slowly and steadily, keeping it parallel to the ground and as close as possible without touching.
• Overlap each sweep by about half the coil's diameter to ensure thorough coverage.
• Listen for clear, repeatable signals. Dig only when you are confident of a good target.

Video 1: Overview of various metal detector models and their operational display.

6. Maintenance

• Cleaning: After each use, wipe down the detector with a damp cloth. Avoid harsh chemicals. The search coil can be rinsed with fresh water.
• Battery Care: Always remove batteries when storing the detector for extended periods to prevent leakage and damage. Use high-quality batteries.
• Storage: Store the detector in a dry, cool place. Avoid extreme temperatures.
• Cable Management: Ensure all cables are free from kinks or damage. Secure them properly to the stem.
• Coil Protection: Consider using a coil cover to protect the search coil from scratches and abrasions.

7. Troubleshooting

No Power:

Check if batteries are correctly installed and fully charged. Ensure the power knob is turned on.

Erratic Signals/False Alarms:

• Perform ground balance correctly for the current soil conditions.
• Reduce the GAIN (sensitivity) setting.
• Check for nearby sources of electromagnetic interference (power lines, cell phones, other detectors).
• Ensure the search coil cable is securely connected and not damaged.
• Increase the DISC MODE setting to filter out more junk metals.

Poor Detection Depth:

• Increase the GAIN (sensitivity) setting, ensuring stable operation.
• Ensure proper ground balance.
• Sweep the coil slowly and close to the ground.
• Check battery levels; low batteries can reduce performance.

No Sound:

• Check volume settings.
• Ensure headphones (if used) are properly connected and functional.
• Check battery levels.

8. User Tips

• Practice Makes Perfect: Spend time in a known area with various buried items to understand how your detector responds to different metals and depths.
• Environmental Awareness: Be mindful of your surroundings. Avoid areas with excessive trash or strong electromagnetic fields for optimal performance.
• Patience is Key: Metal detecting requires patience. Don't get discouraged by initial lack of finds.
• Digging Tools: Always carry appropriate digging tools and a pouch for your finds and any trash you unearth.

9. Warranty and Support

The Tianxun TX-850L Metal Detector comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.

For technical support, troubleshooting assistance, or warranty inquiries, please contact your retailer or the manufacturer directly. Refer to the contact information provided at the point of purchase or on the product packaging.

10. Frequently Asked Questions (FAQ)

Q: Is Tianxun a trading company or a factory?

A: Tianxun is a leading and professional OEM&ODM factory specializing in metal detectors for over 15 years.

Q: How many models of metal detectors does Tianxun offer?

A: We offer more than 70 models, including types for kids, beginners, hobbyists, and professionals.

Q: How deep can this machine detect?

A: Detecting depth is primarily determined by the size of the metal target and the soil conditions. Claims of specific depths without mentioning metal size are often misleading.

Q: Can this machine detect gold?

A: Yes, the TX-850L can detect all types of metals, including gold, silver, copper, coins, etc.

Q: Is the TX-850L easy to operate?

A: Yes, the machine is designed for simple operation. The manual provides clear instructions for assembly and use. Video support can also be provided for better understanding if needed.

Q: Is the product safe?

A: Yes, our products undergo safety testing by ITS and material testing by BV. We hold all necessary certificates for markets in the EU, USA, and Australia, where we have been selling for over 10 years.