1. Introduction
The MASTFUYI FY886B is a versatile digital moisture testing meter designed for accurate measurement of moisture content in various materials, as well as ambient temperature and humidity. Its user-friendly interface, intuitive LED display, and robust design make it an essential tool for professionals and DIY enthusiasts in woodworking, construction, and home inspection. This manual provides detailed instructions for safe and effective use of your FY886B meter.
2. Safety Information
- Always handle the meter with care. The measurement pins are sharp and can cause injury.
- Do not attempt to measure live electrical circuits. This device is not designed for electrical testing.
- Keep the device dry. Exposure to moisture can damage the internal components.
- Do not expose the device to extreme temperatures or direct sunlight for prolonged periods.
- Replace batteries promptly when the low voltage indicator appears to ensure accurate readings.
- Keep out of reach of children.
3. Package Contents
Upon opening the package, please verify that all items listed below are present and in good condition:
- MASTFUYI FY886B Digital Moisture Meter
- Carrying Case
- User Manual (this document)
- Spare Measurement Pins (1 pair)
- Mini Wrench/Tweezer for pin replacement
4. Product Overview
Familiarize yourself with the components and display elements of your FY886B moisture meter:
- LED display
- °C/°F selection button
- Data hold button
- Mode selection button
- Power on/off button
- Temperature display area
- Under-voltage prompt
- Data locking
- Data display area
- General timber (wood mode icon)
- Building material (BLD mode icon)
- Low moisture indicator
- Medium moisture indicator
- High moisture indicator
5. Setup
5.1 Battery Installation
The FY886B requires one 9V (6F22) battery (not included in some packages). To install the battery:
- Locate the battery compartment on the back of the meter.
- Open the battery compartment cover.
- Insert a new 9V battery, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
5.2 Pin Installation/Replacement
The measurement pins are replaceable. A pair of spare pins and a mini wrench/tweezer are included for this purpose.
- To remove existing pins, use the provided mini wrench or tweezer to unscrew them.
- Insert new pins and screw them in firmly.
- Ensure the protective cap is on the pins when not in use to prevent injury and protect the pins.
6. Operating Instructions
6.1 Power On/Off
- Press the red Power On/Off button (5) to turn the meter on.
- Press and hold the red Power On/Off button (5) to turn the meter off.
- The meter will automatically shut down after 10 minutes of inactivity to conserve battery life.
6.2 Selecting Measurement Mode
The FY886B supports two main measurement modes: Wood and Building Material (BLD).
- Press the green MODE button (4) to switch between the Wood (General Timber icon 10) and Building Material (BLD icon 11) modes.
- Ensure the correct mode is selected for the material you are testing to get accurate readings.
6.3 Temperature Unit Selection
- Press the green °C/°F button (2) to switch the ambient temperature display between Celsius (°C) and Fahrenheit (°F).
6.4 Data Hold Function
- Press the green HOLD button (3) to freeze the current reading on the display. The "H" icon (8) will appear.
- Press the HOLD button (3) again to release the data hold and resume live readings.
6.5 Taking a Measurement
- Remove the protective cap from the measurement pins.
- Select the appropriate material mode (Wood or BLD) using the MODE button (4).
- Firmly press the measurement pins into the material you wish to test. Ensure good contact.
- Read the moisture percentage from the data display area (9). The ambient temperature will be shown in the temperature display area (6).
- Observe the visual alerts (12, 13, 14) for low, medium, or high moisture levels.
- After measurement, remove the pins and replace the protective cap.
6.6 Visual Moisture Level Alerts
The meter provides visual alerts to indicate the level of moisture detected:
| Materials Type | Moisture Level | Wood (%) | BLD (%) |
|---|---|---|---|
| Wood / BLD | Low | < 17% | < 12% |
| Wood / BLD | Mid | 17% ~ 20% | 12% ~ 16% |
| Wood / BLD | High | > 20% | > 16% |
7. Maintenance
- **Cleaning:** Wipe the meter with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- **Pin Replacement:** As described in Section 5.2, replace the measurement pins if they become dull or damaged to ensure accurate readings.
- **Battery Replacement:** When the low voltage indicator (7) appears on the display, replace the 9V battery immediately to maintain optimal performance.
- **Storage:** Store the meter in its protective carrying case in a cool, dry place when not in use. Ensure the protective cap is on the pins.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not turn on. | Dead or incorrectly installed battery. | Check battery polarity and replace the 9V battery if necessary. |
| Inaccurate readings. | Dull/damaged pins, incorrect mode selected, poor contact with material. | Replace pins, ensure correct mode (Wood/BLD) is selected, press pins firmly into the material. |
| Meter turns off unexpectedly. | Automatic shutdown activated (10 minutes of inactivity). | This is a normal power-saving feature. Turn the meter back on with the power button. |
| Low voltage indicator (7) is on. | Battery voltage is below 6.2V. | Replace the 9V battery. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | FY886B |
| Display Type | Digital LED with Backlight |
| Wood Moisture Range | 0% ~ 60% |
| Building Material Moisture Range | 0% ~ 60% |
| Accuracy | ±2.0% |
| Material Moisture Sampling Rate | 240 ms |
| Temperature Sampling Rate | 240 ms |
| LCD Refresh Time | 1.5 s |
| Temperature Units | °C / °F selectable |
| Low Voltage Indication | Battery below approx. 6.2V |
| Automatic Shutdown | After 10 minutes of no button operation |
| Power Supply | 1 x 9V (6F22) battery |
| Dimensions (H x W x D) | 165mm x 55mm x 30mm |
| Certifications | CE, FCC |
10. User Tips
- For consistent readings, always insert the pins to the same depth in the material.
- When measuring wood, test multiple spots on the same piece for a more accurate overall moisture assessment.
- Be aware that surface moisture can affect readings. Ensure the material surface is dry before testing.
- The ambient temperature and humidity readings are useful for understanding the environmental conditions that might affect material moisture.
- Always replace the protective cap over the pins when the meter is not in use to prevent damage and ensure safety.
11. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For detailed warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or visit the official Mastfuyi website. Please retain your proof of purchase for warranty claims.
A PDF version of the user manual is available for download: User Manual (PDF)
