Introduction
This manual provides comprehensive instructions for the proper use, assembly, operation, and maintenance of your Fisher F11 All-Purpose Metal Detector. Please read this manual thoroughly before operating the device to ensure optimal performance and longevity.
The Fisher F11 is a lightweight and robust metal detector designed for various treasure hunting activities, including coin hunting, relic searching, and jewelry detection. It features an 11-inch DD searchcoil, a 7.69 kHz operating frequency, and advanced target identification capabilities.
Safety Information
- Always obtain permission before metal detecting on private property.
- Avoid detecting in areas where unexploded ordnance or dangerous materials may be present.
- Exercise caution when digging to avoid damaging underground cables, pipes, or other utilities.
- Do not use the detector in lightning storms.
- Keep batteries out of reach of children. Dispose of batteries responsibly.
- The searchcoil is waterproof, but the control housing is not. Do not submerge the control housing.
Package Contents
Upon unpacking, verify that all components are present:
- Fisher F11 Control Housing
- 11-inch Concentric Elliptical Waterproof Searchcoil
- Adjustable Stem (Upper, Middle, Lower)
- Armrest
- Fasteners for Searchcoil (bolt, washers, nut)
- User Manual
- (Note: 9V battery typically sold separately)
Image: The Fisher F11 metal detector shown with its packaging, illustrating the main unit, searchcoil, and included documentation.
Setup and Assembly
- Attach the Searchcoil:
Align the searchcoil with the lower stem. Insert the plastic bolt through the holes in the searchcoil and the lower stem. Secure with the two rubber washers and the plastic nut. Do not overtighten.
Image: Close-up of the 11-inch DD searchcoil and its connecting cable, ready for attachment to the stem.
- Assemble the Stem:
Connect the lower stem to the middle stem, and then the middle stem to the upper stem. Ensure the spring clips engage securely.
- Mount the Control Housing:
Slide the control housing onto the upper stem. Adjust its position for comfortable viewing and operation. Secure it with the provided locking collar or screw.
Image: Fully assembled Fisher F11 metal detector, showing the control housing, stem, and searchcoil.
- Connect the Searchcoil Cable:
Wrap the searchcoil cable snugly around the stem, leaving enough slack for searchcoil adjustment. Plug the connector into the receptacle on the control housing. Ensure a firm connection.
- Install Battery:
Open the battery compartment on the control housing. Insert one 9-volt alkaline battery, observing the correct polarity. Close the compartment securely.
- Adjust Armrest and Length:
Adjust the armrest and the overall length of the detector to a comfortable position that allows for a natural swing motion. The armrest should support your forearm without strain.
Operating Instructions
1. Power On/Off
Press and hold the Power button (red circle icon) located on the right side of the control housing to turn the detector on or off. The LCD screen will illuminate upon activation.
Image: Close-up of the Fisher F11 control housing, highlighting the LCD display and control buttons.
2. Understanding the Display
The LCD screen provides critical information:
- Target-ID (Fe 23456789): A 9-segment visual indicator that classifies detected metals based on their conductivity. Lower numbers typically indicate ferrous (iron) objects, while higher numbers indicate non-ferrous metals like silver or copper.
- Depth Indicator: A 6-segment bar graph that estimates the depth of coin-sized objects. The more segments illuminated, the deeper the target.
- Battery Indicator: Displays the remaining battery life.
- Mode Indicator: Shows the currently selected operating mode (Jewelry, Coin, Artifact).
Image: Detailed view of the Fisher F11 LCD screen, illustrating the Target-ID segments, depth indicator, and mode selections.
3. Operating Modes
Press the MODE button to cycle through the three pre-programmed detection modes:
- Jewelry Mode: Optimized for detecting rings, necklaces, and other small metallic items.
- Coin Mode: Designed to identify coins and similar metallic objects, often discriminating against iron.
- Artifact Mode: A general-purpose mode suitable for a wider range of metallic objects, including relics.
4. Discrimination and Notch
The F11 allows you to discriminate against unwanted metals. Use the MENU button to access discrimination settings. The + and - buttons adjust the discrimination level or "notch" out specific target IDs. Refer to the display for current settings.
5. Pinpoint Function
Once a target is detected, press and hold the PP (Pinpoint) button. Move the searchcoil slowly over the target area. The detector will emit a continuous tone and the depth indicator will become more precise as you center the coil directly over the target. This helps in accurate recovery.
6. Searchcoil Operation
The 11-inch DD searchcoil provides excellent ground coverage and depth. Swing the searchcoil in a slow, overlapping motion, keeping it parallel to the ground and as close as possible without touching. The waterproof design allows for use in shallow water, but ensure the control housing remains dry.
Image: A person operating a Fisher metal detector in an outdoor environment, demonstrating typical usage.
Maintenance
- Cleaning: Wipe down the detector with a damp cloth after each use. Avoid abrasive cleaners or solvents.
- Searchcoil: The searchcoil is waterproof and can be rinsed with fresh water. Ensure the cable connection to the control housing remains dry.
- Control Housing: The control housing is not waterproof. Protect it from rain, splashes, and submersion.
- Battery: Remove the 9V battery if the detector will not be used for an extended period to prevent leakage.
- Storage: Store the detector in a cool, dry place, away from extreme temperatures and direct sunlight.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Detector does not power on. | Dead or incorrectly installed battery. | Replace the 9V battery or ensure it is installed with correct polarity. |
| Erratic signals or false positives. | High mineralization in soil, electromagnetic interference, or loose searchcoil cable. | Tighten searchcoil cable. Try adjusting sensitivity or using a different mode. Move away from power lines or other electronic devices. |
| No target audio. | Volume too low, headphones not connected properly, or speaker issue. | Check volume settings. Ensure headphones are fully plugged in. |
| Poor depth detection. | Incorrect ground balance (if applicable), low sensitivity, or small target size. | Increase sensitivity. Ensure proper swing technique. |
Specifications
| Feature | Detail |
|---|---|
| Model | F11 |
| Operating Frequency | 7.69 kHz |
| Searchcoil | 11-inch Concentric Elliptical, Waterproof |
| Target-ID Segments | 9 segments |
| Depth Indicator | 6 segments (for coin-sized objects) |
| Operating Modes | Jewelry, Coin, Artifact |
| Power Source | 1 x 9V Alkaline Battery |
| Battery Life | Approximately 20-25 hours |
| Weight | 2.5 pounds (1.13 kg) |
| Adjustable Length | Yes |
| International Protection Rating | IP54 (Control housing not waterproof) |
| Material | ABS Plastic |
| Product Dimensions | 22 x 11 x 5.5 inches (approximate, assembled) |
Warranty
The Fisher F11 Metal Detector is backed by a 5-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For full warranty terms and conditions, please refer to the official Fisher Research Labs website or contact customer support.
Image: The official logo for Fisher Research Labs, indicating the brand's identity.
Support and Contact Information
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Fisher Research Labs customer support:
- Website: Visit the official Fisher Research Labs website for FAQs, additional resources, and contact forms.
- Phone/Email: Refer to the product packaging or the official website for the most current contact details.
Always provide your product model (F11) and serial number (if applicable) when contacting support.
