1. Introduction
The TENMARS TM-192 is a professional 3-axis triaxial gaussmeter designed to measure electromagnetic fields (EMF) and extremely low frequency (ELF) magnetic fields. It operates within a frequency response range of 30Hz to 2000Hz. This device is ideal for assessing electromagnetic radiation intensity produced by various electrical equipment and power sources in residential, commercial, and industrial environments.
The TM-192 features a triple-axis sensor (X, Y, Z) for comprehensive measurements, data hold, maximum hold, and minimum hold functions for convenient analysis. A variant, the TM-192D, includes a USB datalogger for advanced data recording and analysis.
2. Setup
2.1. What's in the Box
- TENMARS TM-192 EMF/ELF Meter
- User's Manual
- Carrying Case
- For TM-192D (if applicable): MINI USB 4P(MALE) to USB A Type cable, CD disk
2.2. Battery Installation
- Locate the battery compartment cover on the back of the device.
- Slide or unclip the cover to open the compartment.
- Insert a 9V NEDA 1604, IEC 6F22, or JIS 006P battery, ensuring correct polarity.
- Close the battery compartment cover securely.
Note: Batteries are not included in the standard package due to international shipping regulations. Please purchase them separately from a local store.
2.3. External Power (Optional)
The device can also be powered via a DC 9V input. Connect a compatible DC 9V power adapter to the DC 9V port on the side of the meter.
3. Operating Instructions
3.1. Device Overview
The TM-192 features a 4-digit triple LCD display and several control buttons:
- Power Button (Green Circle): Turns the device ON/OFF.
- MAX/MIN Button: Toggles between maximum and minimum reading display.
- HOLD Button: Freezes the current reading on the display.
- REC Button: Initiates data recording (for TM-192D model).
- RANGE Button: Cycles through measurement ranges (20/200/2000 mG or 2/20/200μT).
- READ Button: Used for reading recorded data (for TM-192D model).
- SET Button: Accesses settings menu.
- G/T Button: Toggles between Gauss (mG) and Tesla (μT) units.
- Arrow Buttons: Navigation within menus or data.
3.2. Basic Measurement
- Press the green power button to turn on the meter.
- The device will perform a self-test and display the current readings.
- Use the RANGE button to select the appropriate measurement range. Start with a higher range if the field strength is unknown to avoid overload.
- Use the G/T button to switch between milliGauss (mG) and microTesla (μT) units as desired.
- Position the meter in the area where you want to measure the electromagnetic field. The triple-axis sensor measures fields in X, Y, and Z directions for a comprehensive reading.
- Read the values displayed on the LCD.
3.3. Special Functions
- Data Hold (HOLD): Press the HOLD button to freeze the current reading on the display. Press it again to release.
- Maximum/Minimum Hold (MAX/MIN): Press the MAX/MIN button to display the maximum recorded value since the function was activated. Press again to display the minimum value. Press a third time to return to live readings.
- Data Logging (TM-192D only): For the TM-192D model, use the REC button to start/stop data recording and the READ button to review logged data. Refer to the specific TM-192D manual and CD disk software for detailed data logging and analysis instructions.
3.4. Measuring Electromagnetic Field Sources
The TM-192 is capable of measuring electromagnetic field radiation intensity from various sources, including but not limited to:
- Electric transmission equipment
- Power lines
- Microwave ovens
- Air conditioners
- Refrigerators
- Computer monitors
- Video/audio devices
- Other household and office appliances
3.5. Product Demonstration Video
This video provides a visual guide to the features and basic operation of the TENMARS TM-192 meter.
4. Maintenance
4.1. Cleaning
To clean the device, wipe it with a soft, dry cloth. Do not use abrasive cleaners, solvents, or strong chemicals, as these may damage the casing or internal components. Ensure the device is powered off before cleaning.
4.2. Battery Replacement
When the battery indicator on the LCD shows low power, replace the 9V battery as described in the "Battery Installation" section (2.2). Always dispose of used batteries responsibly according to local regulations.
4.3. Storage
Store the TM-192 in a cool, dry place away from direct sunlight and extreme temperatures. If storing for an extended period, remove the battery to prevent leakage and potential damage to the device. Recommended storage conditions are -10°C to 60°C (14°F to 140°F) and below 70% relative humidity.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Dead or incorrectly installed battery; no external power. | Check battery installation and replace if necessary. Ensure external power supply is connected and functional. |
| "OL" displayed on screen | Overload condition; magnetic field strength exceeds current range. | Switch to a higher measurement range using the RANGE button. |
| Inaccurate or fluctuating readings | Interference from other electronic devices; low battery; device malfunction. | Move away from other electronic devices. Replace battery. If problem persists, contact support. |
| Display is blank or dim | Low battery; display damage. | Replace battery. If still dim, contact support. |
6. Specifications
| Feature | Detail |
|---|---|
| Display | 4 digits Triple LCD display |
| Measurement Range | 20/200/2000 mG, 2/20/200 μT |
| Resolution | 0.01/0.1/1 mG or 0.001/0.01/0.1 μT |
| Frequency Response | 30Hz to 2000Hz |
| Sensor | Triple Axis (X, Y, Z) |
| Accuracy (50Hz/60Hz) | 20 mG / 2μT: ±(3.0%+30dgt) Other ranges: ±(2.5%+5dgt) |
| Accuracy (30Hz/2000Hz) | ±(5%+5dgt) |
| Overload Indication | LCD display “OL” |
| Sample Rate | 2.5 times per second |
| Battery | 9V NEDA 1604, IEC 6F22 or JIS 006P |
| Battery Life | Approximate 100 hours |
| Operating Temperature & Humidity | 5°C to 40°C (41°F to 104°F), below 80% RH |
| Storage Temperature & Humidity | -10°C to 60°C (14°F to 140°F), below 70% RH |
| Weight | About 230g (0.51 lbs) |
| Dimensions | 173(L) x 80(W) x 32(H) mm (6.8 x 3.1 x 1.3 inches) |
| Certification | CE |
| Origin | Taiwan (China) |
7. User Tips
- Start with High Range: When measuring an unknown field, always start with the highest measurement range to prevent an overload reading and then decrease the range for more precise results.
- Maintain Distance: Keep the meter at a consistent distance from the source for comparative measurements.
- Avoid Interference: Perform measurements away from other strong electromagnetic sources that are not the target of your measurement to avoid skewed readings.
- Battery Check: Regularly check the battery level, especially before critical measurements, to ensure consistent performance.
- Environmental Factors: Be aware that environmental factors like temperature and humidity can slightly affect readings. Operate within the specified environmental conditions.
8. Warranty & Support
For technical support, service, or warranty inquiries, please contact the retailer or manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims. Do not attempt to repair the device yourself, as this may void the warranty and could lead to further damage or injury.