1. Introduction
The MASTFUYI FY8862 is a portable digital sound level meter designed for accurate measurement of audio noise volume. It features A-weighting, a wide measurement range of 30dB to 130dB, visual alarm indicators, and multiple reading modes for various environmental monitoring needs. This manual provides detailed instructions for the proper use and maintenance of your device.
2. Key Features
- High-Precision Condenser Microphone: Equipped with a 1/2-inch electret sensor and A-weighting for accurate human-ear simulation.
- Wide Measurement Range: Measures sound levels from 30dB to 130dB with 0.1dB resolution and ±1.5dB accuracy.
- Visual Alarm Indicator: Features Red/Green LED lights that alert when sound exceeds 60dB, providing quick visual feedback.
- Multiple Reading Modes: Supports real-time, average, and MAX value recording.
- Fast/Slow Response Toggle: Allows switching between fast (125ms) and slow (1000ms) response times for different measurement scenarios.
- Windshield Sponge Sleeve: Reduces wind interference for more reliable measurements in outdoor or windy conditions.
- Comfortable Design: Ergonomic design with a clear LCD display and skin-friendly silicone buttons.
3. Package Contents
Please check the package contents upon receipt. If any items are missing or damaged, contact your vendor.
- MASTFUYI FY8862 Sound Level Meter
- Windshield Sponge Sleeve
- User Manual
4. Parts Identification
- Windshield Cylindrical Sponge: Reduces wind noise interference for accurate measurements.
- Sensor: 1/2 inch electret condenser microphone for sound detection.
- LCD Display: Shows measurement readings, mode indicators (FAST/SLOW, MAX), and battery status.
- Function Keys: Includes ON-OFF, MAX, and FAST/SLOW buttons.
- Meter Body Case: The main housing of the device.
- Alarm Lights: Red/Green LEDs indicating sound levels relative to 60dB.
5. Setup
5.1. Battery Installation
The MASTFUYI FY8862 requires two (2) 1.5V AAA batteries (not included).
- Locate the battery compartment cover on the back of the device.
- Slide the cover open.
- Insert two AAA batteries, ensuring correct polarity (+ and -).
- Close the battery compartment cover securely.
6. Operating Instructions
6.1. Power On/Off
- Press the red ON-OFF button to turn the device on.
- Press and hold the red ON-OFF button again to turn the device off.
6.2. Basic Measurement
Once powered on, the device will immediately begin measuring sound levels and display the real-time value on the LCD screen.
6.3. MAX Mode
- Press the MAX button to enter MAX mode. The display will show the maximum sound level recorded since entering this mode.
- Press the MAX button again to exit MAX mode and return to real-time measurement.
6.4. FAST/SLOW Response Mode
- Press the FAST/SLOW button to toggle between fast and slow response times.
- FAST (125ms): Reads the sound level in real-time, suitable for capturing sudden noise changes.
- SLOW (1000ms): Reads the current average sound level, suitable for measuring stable noise environments.
6.5. Alarm Lights
The device features visual alarm lights to indicate noise levels:
- Green Light: Illuminates when the sound level is less than 60dB.
- Red Light: Illuminates when the sound level is greater than 60dB.
6.6. Environmental Noise Reference
Understanding common noise levels can help interpret measurements:
- 0-20 dB: Very quiet
- 20-40 dB: Quiet, whisper, library
- 40-60 dB: Normal indoor conversation, office
- 60-70 dB: Noisy traffic, nerve-damaging with prolonged exposure
- 70-90 dB: Extremely noisy, nerve cells damaged, workshop
- 90-100 dB: Begins to damage hearing
- 100-120 dB: Unbearable, can cause temporary deafness
- 120 dB above: Extremely deaf or totally deaf
7. Specifications
| Parameter | Value |
|---|---|
| Frequency Weighting | A-Weighting |
| Frequency Response | 31.5Hz ~ 8KHz |
| Measurement Range | 30dB ~ 130dB |
| Sound Resolution | 0.1dB |
| Response Time (FAST) | 125ms |
| Response Time (SLOW) | 1000ms |
| Overload Indication (<30dB) | Displaying UN |
| Overload Indication (>130dB) | Displaying OL |
| Accuracy | ±1.5dB |
| Sensor | 1/2 inch electret condenser microphone |
| Power Source | 2 x 1.5V AAA Battery |
| Product Weight | 50g |
| Product Dimensions | 169mm x 24mm x 26mm |
| Is Smart Device | No |
| Certification | CE, FCC |
8. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries to prevent leakage.
- Sponge Sleeve: Ensure the windshield sponge sleeve is clean and free from debris for optimal performance. Replace if damaged.
- Avoid Impact: Protect the device from drops and impacts, especially the microphone sensor.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low or dead batteries; Incorrect battery installation | Replace batteries; Check battery polarity |
| Inaccurate readings | Damaged sensor; Wind interference; Device not calibrated | Ensure windshield sponge is in place; Avoid strong winds; Contact support if sensor is damaged or calibration is suspected |
| Display shows "UN" or "OL" | Sound level is outside the measurement range (Underload/Overload) | Move to an environment within the 30-130dB range |
| Alarm lights not working | Device malfunction | Contact customer support |
10. User Tips
- For consistent readings, hold the meter at arm's length, pointing the microphone towards the sound source.
- Use the 'FAST' response mode for quick, fluctuating noises and 'SLOW' for more stable, continuous sounds.
- Always use the windshield sponge sleeve when measuring outdoors or in windy conditions to minimize interference.
- Keep a fresh set of AAA batteries on hand, especially for critical measurements.
11. Safety Information
- Do not attempt to open or modify the device. This may cause damage and void the warranty.
- Keep the device away from water and other liquids.
- Do not expose the device to extreme temperatures or high humidity.
- Dispose of batteries according to local regulations.
- This device is not a toy. Keep out of reach of children.
12. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or visit the official Mastfuyi website.
