1. Introduction
The Mastfuyi FY106B Mini Digital Multimeter is a versatile and reliable electronic measurement tool designed for both professional electricians and DIY enthusiasts. It offers a wide range of measurement functions, high precision, and a portable design, making it suitable for various applications from simple circuit checks to complex electronic experiments.
Key features include multi-function measurement (voltage, current, resistance, frequency, capacitance), high-precision results, a compact and portable design, built-in safety protection mechanisms, and a large, clear LCD screen for easy data reading.
2. Safety Information
Always read and understand all safety instructions before using this device. Failure to do so may result in electric shock, fire, or damage to the meter or the equipment under test.
- This device is rated CAT III 600V, indicating its suitability for measurements in distribution boards, circuit breakers, wiring, including cables, bus-bars, junction boxes, switches, socket outlets in the fixed installation, and equipment for industrial use.
- The multimeter features a ceramic fuse for fast blowing and effective protection, rated at 4A MAX.
- Always ensure the test leads are properly connected to the correct input jacks for the measurement type.
- Do not attempt to measure voltage or current exceeding the specified maximum limits.
- Before measuring resistance, continuity, or capacitance, ensure that the circuit is de-energized and all capacitors are discharged.
- Use caution when working with live circuits. Wear appropriate personal protective equipment.
3. Package Contents
Verify that all items are present and undamaged upon opening the package:
- 1 x Mastfuyi FY106B Mini Digital Multimeter
- 1 x Pair of Test Leads (Red and Black)
- 1 x User Manual
Note: 2x AAA batteries are required for operation and are not included in the package.
4. Product Overview
The FY106B multimeter features a compact design with a large digital display and intuitive controls.
4.1. Features
- Automatic Recognition for all measuring ranges
- Large Digital Display
- Auto Power Off function
- Data Retention (HOLD function)
- Built-in Flashlight
- NCV (Non-Contact Voltage) Detection
- LIVE Wire Mode (Neutral Line/Hot Wire Detection)
- Continuity Test
- Resistance Measurement
- Capacitance Measurement
- Frequency Measurement
- AC/DC Voltage Measurement
- AC/DC Current Measurement
4.2. Controls and Input Jacks
The front panel includes:
- Power Button: To turn the device ON/OFF.
- SEL Button: To switch between manual measurement functions.
- HOLD Button: To retain the current measurement reading on the display.
- NCV/LIVE Button: To activate Non-Contact Voltage detection or LIVE wire mode.
- Input Jacks:
- VΩHz: For voltage, resistance, frequency, and capacitance measurements.
- A: For current measurements.
- COM: Common terminal for all measurements.
5. Setup
5.1. Battery Installation
- Locate the battery compartment on the back of the multimeter.
- Open the battery cover.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.
5.2. Connecting Test Leads
- Before use, remove the protective caps from the tips of the test leads.
- For most measurements (voltage, resistance, frequency, capacitance), insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
- For current measurements, insert the red test lead into the 'A' jack and the black test lead into the 'COM' jack.
- Ensure the leads are firmly seated in the jacks.
6. Operating Instructions
6.1. Power On/Off
Press the power button to turn the multimeter on. The device will automatically enter the intelligent recognition mode. Press and hold the power button to turn it off.
6.2. Measurement Modes
The FY106B offers both automatic and manual measurement modes.
- Automatic Recognition Mode: Upon power-on, the multimeter intelligently recognizes the measurement type (e.g., AC/DC voltage, resistance) and range, simplifying operation.
- Manual Mode: Press the 'SEL' button to cycle through different measurement functions (e.g., AC Voltage, DC Voltage, Resistance, Continuity, Capacitance, Frequency) when in a specific measurement category.
6.3. Specific Measurements
6.3.1. Voltage Measurement (AC/DC)
- Connect the red lead to 'VΩHz' and the black lead to 'COM'.
- Select AC or DC voltage mode if not automatically recognized.
- Connect the test leads in parallel across the component or circuit to measure voltage.
6.3.2. Current Measurement (AC/DC)
- Connect the red lead to 'A' and the black lead to 'COM'.
- Select AC or DC current mode.
- Connect the multimeter in series with the circuit to measure current. Ensure the circuit is de-energized before connecting.
6.3.3. Resistance Measurement
- Connect the red lead to 'VΩHz' and the black lead to 'COM'.
- Select resistance mode.
- Connect the test leads across the component to measure its resistance. Ensure the component is isolated from the circuit and de-energized.
- The multimeter can also perform short-circuit detection, useful for appliance repair and checking motor coils or electrical appliances for leakage.
6.3.4. NCV (Non-Contact Voltage) Detection
- Press the 'NCV/LIVE' button to activate NCV mode.
- Place the top of the multimeter (where the NCV marking is) close to an AC power source.
- The multimeter will detect AC voltage, sound an alarm, and display an analog bar indicating signal strength (weak, median, strong).
6.3.5. LIVE Wire Mode (Neutral Line/Hot Wire Detection)
- Press the 'NCV/LIVE' button to cycle to LIVE wire mode.
- Plug a single test lead (typically the red one) into the 'VΩHz' jack.
- Insert the tip of the test lead into a socket or touch it to a wire.
- If it's a hot wire, an alarm will sound, and the screen will display 'LIVE'. A neutral line will show no reaction.
6.3.6. Other Functions
- HOLD Function: Press the 'HOLD' button to freeze the current reading on the display. Press it again to release.
- Flashlight: The built-in flashlight can be activated for better visibility in dimly lit areas.
- Auto Power Off: The multimeter will automatically power off after a period of inactivity to conserve battery life.
7. Maintenance
7.1. Cleaning
Wipe the meter with a damp cloth and mild detergent. Do not use abrasives or solvents. Keep the device dry.
7.2. Battery Replacement
When the battery indicator appears on the display, replace the batteries promptly to ensure accurate readings. Follow the battery installation steps in Section 5.1.
7.3. Fuse Replacement
If the current measurement function stops working, the fuse may need replacement. Refer to a qualified technician for fuse replacement to ensure proper safety and functionality, using only the specified ceramic fuse type (4A MAX).
8. Troubleshooting
- No Display: Check if the batteries are installed correctly and have sufficient charge. Replace if necessary.
- Inaccurate Readings: Ensure test leads are properly connected. Verify the correct measurement mode is selected. Check battery level.
- No Continuity Beep: Ensure the circuit is de-energized. Check if the leads are making good contact.
- Current Measurement Not Working: Check the fuse. If blown, it needs replacement by a qualified person.
9. Specifications
| Parameter | Value |
|---|---|
| Brand Name | Mastfuyi (Jarhead) |
| Model | FY106B |
| Display Type | Digital Display |
| Certification | CE |
| DIY Supplies | Electrical |
| Origin | Mainland China |
| DC Voltage Range | 1V~600V |
| AC Voltage Range | 1V~600V |
| DC Current Range | 100mA~4A |
| AC Current Range | 100mA~4A |
| Measuring Resistance Range | 50Ω~40MΩ |
| Measuring Capacitance | Yes (Range not specified) |
| Measuring Frequency | Yes |
| Power Type | 2*AAA batteries (not included) |
| Safety Rating | CAT III 600V |
| Fuse Protection | 4A MAX Ceramic Fuse |
10. User Tips
- Start High: When measuring an unknown voltage or current, always start with the highest range setting to prevent overloading the meter. The FY106B's auto-ranging feature helps mitigate this, but manual mode users should be aware.
- Correct Lead Placement: Double-check that your test leads are in the correct input jacks for the measurement you intend to make (e.g., 'A' for current, 'VΩHz' for voltage/resistance).
- Battery Check: Regularly check the battery indicator. Low batteries can lead to inaccurate readings or unexpected shutdowns.
- Cleanliness: Keep the test leads and meter clean. Dirt or moisture can affect conductivity and safety.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.
