1. Introduction
The Mestek EMF01 is a digital electromagnetic radiometer designed for precise detection of electromagnetic radiation from various electrical equipment. It features a high-sensitivity three-axis induction probe (X, Y, Z axes) for comprehensive electric and magnetic field measurements, along with ambient temperature detection. This instrument is equipped with an over-radiation alarm, digital and analog dual display, and a color-coded safety classification system for easy interpretation.
Its robust design includes a shockproof rubber shell, making it comfortable to handle, resistant to falls and abrasion, and highly durable. The EMF01 is suitable for use in a wide range of environments, including homes, offices, industrial settings, power distribution rooms, high-speed railways, and near signal base stations.
Figure 1: Mestek EMF01 Electromagnetic Radiation Detector
2. Package Contents
Please check the package contents upon receipt to ensure all items are present:
- 1 x Mestek EMF01 Electromagnetic Radiation Tester
- 1 x Screwdriver
- 1 x Packing box
- 1 x Velvet bag
- 1 x Instruction manual
Figure 2: Standard Package Items
3. Device Layout and Controls
Familiarize yourself with the device's components and controls:
Figure 3: Device Layout and Controls
- Electromagnetic Induction Probe: Detects electric and magnetic fields along X, Y, Z axes.
- Screen: High-definition color display for readings and indicators.
- HOLD Button: Retains the current measurement on the display.
- SEL Button (Function Conversion): Switches between electric field, magnetic field, and temperature measurement modes.
- Power Button: Turns the device on or off.
- AVG MAX Button (Average/Maximum Value): Toggles between average and maximum value display.
- Buzzer On/Off Button: Activates or deactivates the audible alarm.
4. Setup
4.1 Battery Installation
- Locate the battery compartment on the back of the device.
- Use the provided screwdriver to open the battery cover.
- Insert three (3) AAA batteries, ensuring correct polarity (+/-).
- Close the battery cover and secure it with the screw.
The device is powered by 3*AAA batteries, which are easy to replace and energy-efficient.
Figure 4: Battery Installation
5. Operating Instructions
5.1 Power On/Off
- Press the Power Button (red circle with power symbol) to turn the device on.
- To turn off, press and hold the Power Button until the screen shuts down. The device also features automatic power off after approximately 10 minutes of inactivity to conserve battery life.
5.2 Measurement Modes
The EMF01 can measure electric field radiation, magnetic field radiation, and ambient temperature. Use the SEL Button to cycle through these modes.
- Electric Field (E-field): Measures electric field strength in V/m.
- Magnetic Field (H-field): Measures magnetic field strength in uT or mG.
- Ambient Temperature: Displays temperature in °C or °F.
5.3 Unit Switching
The device supports switching between different units for magnetic field and temperature measurements:
- Magnetic Field Units: Press the SEL Button to switch between micro Teslas (uT) and Milligauss (mG).
- Temperature Units: The device automatically displays temperature. Use the appropriate button (often combined with SEL or another function) to switch between Celsius (°C) and Fahrenheit (°F).
Figure 5: Complete Functions Overview
5.4 Data Hold (HOLD)
Press the HOLD Button to freeze the current reading on the screen. Press it again to release and resume live measurements.
5.5 Average/Maximum Value (AVG MAX)
Press the AVG MAX Button to toggle between displaying the average measurement value and the maximum measurement value recorded since the device was powered on or the mode was reset.
5.6 Alarm Function (Buzzer)
The device features an audible alarm that activates when radiation levels exceed predefined safety thresholds. Press the Buzzer On/Off Button to enable or disable the sound alarm.
5.7 Interpreting Readings (Color Display)
The EMF01 features a color display that provides both digital and analog readings, along with visual safety indicators:
Figure 6: Color Display Interface
- Green Zone (Safe): Indicates low radiation levels, generally considered safe.
- Yellow Zone (Caution): Indicates moderate radiation levels, suggesting caution.
- Red Zone (Harmful/Alarm): Indicates high radiation levels, triggering an audible alarm and displaying a "Harmful" warning. It is recommended to move away from the source of radiation.
The screen will simultaneously display "ALARM" and "Harmful" prompts when radiation exceeds the standard.
Radiation Area Comparison Table:
| Unit | Green (Safe) | Yellow (Caution) | Red (Harmful) |
|---|---|---|---|
| uT | 0.00 ~ 0.39 | 0.40 ~ 0.79 | 0.80 ~ 74.00 |
| mG | 0 ~ 3.9 | 4.0 ~ 7.9 | 8.0 ~ 740.0 |
| V/m | 0 ~ 39 | 40 ~ 79 | 80 ~ 9999 |
Table 1: Radiation Level Guidelines
5.8 Screen Display Symbols
| Symbol | Description |
|---|---|
| HOLD | Data retention |
| MAX | Maximum value |
| AVG | Average value |
| uT | micro Teslas (Magnetic Field Unit) |
| mG | Milligauss (Magnetic Field Unit) |
| V/m | Volts/meter (Electric Field Unit) |
| E-field | Electric field measurement mode |
| H-field | Magnetic field measurement mode |
| Safe | Indicates safe radiation levels |
| Harmful | Indicates harmful radiation levels |
| ALARM | Alarm activated due to high radiation |
| °C | Celsius (Temperature Unit) |
| °F | Fahrenheit (Temperature Unit) |
| % | Percentage (Not explicitly defined, likely battery or other indicator) |
| Battery Indicator | Displays current battery level |
| Automatic power off | Indicates automatic power off feature is active |
| Temperature | Temperature measurement mode |
| Buzzer | Indicates buzzer status (on/off) |
| Analog display | Analog bar graph display |
Table 2: Screen Symbols and Descriptions
6. Maintenance
6.1 Cleaning
To maintain the accuracy and longevity of your EMF01 detector:
- Wipe the device with a soft, dry cloth.
- Do not use abrasive cleaners or solvents, as these can damage the casing or screen.
- Ensure no liquids enter the device.
6.2 Battery Replacement
When the low battery indicator appears on the screen, replace the AAA batteries as described in Section 4.1.
6.3 Storage
When not in use for extended periods, store the device in the provided velvet bag in a cool, dry place, away from direct sunlight and extreme temperatures. Remove batteries if storing for very long durations to prevent leakage.
7. Troubleshooting
- Device does not power on: Check if batteries are installed correctly and have sufficient charge. Replace with new batteries if necessary.
- Inaccurate readings: Ensure the device is held steadily and away from strong magnetic or electric fields that are not being measured. Calibrate if a calibration option is available (not explicitly mentioned for this model, but general advice).
- Screen is blank or flickering: Check battery level. If the issue persists, contact customer support.
- Alarm sounds frequently: Review the radiation area comparison table (Table 1) to understand the thresholds. If the alarm sounds in an area you believe should be safe, re-evaluate the environment or consider potential hidden sources of radiation.
8. Specifications
Figure 7: Technical Parameters
| Parameter | Value |
|---|---|
| Working height | 2000m |
| Measurement mode | Electromagnetic induction |
| Display | VA reverse display color screen |
| Maximum display | 9999 |
| Sampling rate | About 0.4 second |
| Measuring range (V/m) | 0 ~ 9999 |
| Measuring range (uT) | 0 ~ 74 |
| Measuring range (mG) | 0 ~ 740 |
| Resolution (V/m) | 1 |
| Resolution (uT) | 0.01 |
| Resolution (mG) | 0.1 |
| Bandwidth | 5-3500MHz |
| Automatic shutdown | About 10 minutes |
| Operating current | About 20mA |
| Power supply | 1.5V × 3 AAA batteries (not included) |
| Measuring temperature range | -10 ~ 60°C |
| Working temperature and humidity | 0 ~ 60°C / 0 ~ 85%RH |
| Storage temperature and humidity | -10 ~ 60°C / 0 ~ 80%RH |
| Size | 170 × 73 × 33mm |
| Weight | About 160g (without battery) |
8.1 Product Dimensions
Figure 8: Product Dimensions
9. User Tips
- Optimal Placement: For best results, hold the detector at arm's length and slowly move it around the area you wish to measure. The three-axis probe ensures comprehensive detection regardless of orientation.
- Identify Sources: Use the device to pinpoint specific sources of radiation. For example, check common household appliances like televisions and electric ovens, which can emit varying levels of EMF.
Figure 9: Radiation Examples
- Environmental Awareness: Be aware that radiation is present in many daily environments, including from computers, mobile phones, and Wi-Fi routers. The EMF01 helps you identify areas where radiation levels might be higher than desired.
Figure 10: Computer Radiation Example
- Durability: The shockproof rubber shell provides excellent protection against accidental drops, making the device reliable for various applications.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.
