1. Introduction
The wintact WT3121 is a versatile handheld digital LCD EMF meter designed for simultaneous detection of electric and magnetic field radiation. It features a sound and light alarm system that activates when radiation levels exceed safe thresholds, a data lock function to capture readings, and an LCD graphic display to visualize radiation trends. The device also provides a radiation assessment to indicate the safety of current radiation values. Its stylish design and easy one-hand operation make it convenient for both mobile and on-site measurements.
2. Product Features
- Dual-Use Functionality: Simultaneously tests electric field radiation and magnetic field emission.
- Sound-Light Alarm: Automatic alarm (audible and visual) when test results exceed predefined safe values.
- Data Locking: One-key function to lock the current radiation value on the display.
- LCD Display: Clear digital display for easy reading of values and graphic representation of radiation trends.
- Radiation Assessment: Provides an indication of whether the current radiation value is safe.
- Portability: Fashionable design, easy one-hand operation, and convenient for field measurements.
- Data Retention: Ability to keep data for review.
- Low Battery Indicator: Prompt for low electricity.
- Auto Power-Off: Automatically shuts down to conserve battery.
- Rechargeable Battery: Equipped with a built-in rechargeable battery for convenience.
3. Getting Started
3.1 Package Contents
Ensure all items are present in the package:
- 1 x WT3121 Electromagnetic Radiation Detector
- 1 x User Manual (English)
- 1 x USB Charging Cable
3.2 Charging the Device
The WT3121 features a built-in rechargeable battery. Before first use, or when the low electricity prompt appears, charge the device using the provided USB cable.
- Connect the small end of the USB charging cable to the charging port on the WT3121.
- Connect the standard USB end of the cable to a compatible USB power source (e.g., computer USB port, USB wall adapter).
- The device will indicate charging status (e.g., an indicator light).
- Once fully charged, disconnect the cable.
4. Operating Instructions
4.1 Device Overview
- Front Sensing Area: The top part of the device where electromagnetic fields are detected.
- LCD Display: Shows measurement values, units, and status.
- Indicator Light: Provides visual feedback, especially during alarms.
- Startup/LED Button: Powers the device on/off and controls the LED backlight.
- AVG/VPP Button: Switches between Average and Peak value measurement modes.
- °C/°F Button: Toggles the temperature unit between Celsius and Fahrenheit.
4.2 Power On/Off
Press and hold the Startup/LED button to turn the device on or off. A short press of this button will toggle the LED backlight.
4.3 Taking Measurements
The WT3121 automatically detects both electric and magnetic fields simultaneously once powered on. Hold the device with the front sensing area pointed towards the source of potential radiation.
4.4 Understanding the Display
The LCD display shows real-time readings for both electric field (E-field in V/m) and magnetic field (H-field in µT). It also displays the ambient temperature.
- AVG: Average measurement mode.
- VPP: Peak value measurement mode.
- Safe/Unsafe Indicator: The display will visually indicate if the current radiation level is safe or unsafe.
4.5 Alarm Function
When the detected radiation value exceeds the preset alarm threshold (40 V/m for electric field, 0.4 µT for magnetic field), the device will trigger a sound and light alarm. The display backlight may also change color (e.g., to red) to indicate an over-limit condition.
4.6 Data Lock
Press the AVG/VPP button briefly to lock the current radiation values on the display. Press it again to unlock and resume real-time measurement.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Recharge the battery when the low electricity prompt appears. Avoid fully discharging the battery for extended periods.
- Auto Power-Off: The device features an auto power-off function to conserve battery life. Ensure the device is turned off when not in use.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low or depleted battery. | Charge the device using the USB cable. |
| Readings appear inaccurate or erratic. | Interference from other electronic devices; device not held correctly; environmental factors. | Move away from other strong EMF sources; ensure proper handling; re-test in a different location. |
| Alarm sounds frequently. | High radiation levels detected. | Move away from the source of radiation or reduce exposure time. Verify the source of the high reading. |
| Display is dim or unresponsive. | Low battery; extreme temperatures. | Recharge the device. Ensure operation within specified temperature range (0°C-50°C). |
7. Specifications
| Parameter | Electric Field | Magnetic Field |
|---|---|---|
| Unit | V/m | µT |
| Precision | 1 V/m | 0.01 µT |
| Range | 1-1999 V/m | 0.01-19.99 µT |
| Alarm Threshold Value | 40 V/m | 0.4 µT |
| Reading Display | 3-1/2 -digital LCD | |
| Test Bandwidth | 5Hz-3500MHz | |
| Sampling Time | Approx. 0.4 Seconds | |
| Measurement Mode | Dual mode at the same time | |
| Over Range Indication | LCD display the maximum measurement range | |
| Operating Temperature | 0°C-50°C / 30℉-122℉ | |
| Operating Humidity | Relative Humidity <80% | |
| Power Supply | 3.7V Lithium Battery | |
| Item Size | 130 x 60 x 25 mm | |
| Item Weight | 121g | |
| Package Size | 60 x 25 x 133 mm | |
| Package Weight | 0.160kg | |
8. User Tips
To get the most out of your WT3121 EMF Meter, consider the following tips:
- Identify Sources: Use the meter to pinpoint specific sources of electromagnetic radiation in your home or office, such as Wi-Fi routers, microwaves, computers, and power lines.
- Distance is Key: Remember that radiation levels generally decrease significantly with distance. Even a small increase in distance from a source can reduce exposure.
- Check Sleeping Areas: It's often recommended to check EMF levels in bedrooms, especially near beds, as prolonged exposure during sleep can be a concern for some users.
- Monitor Appliances: Test various home appliances both when they are on and off, as some devices can still emit EMFs even in standby mode.
- Consider Vulnerable Groups: If you are pregnant or have young children, you might want to be more diligent in monitoring and reducing EMF exposure in your environment.
9. Warranty and Support
For any questions, technical support, or warranty claims regarding your WT3121 EMF Meter, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
