Introduction
The Extech MF100 is a versatile AC/DC Magnetic Field Meter designed for accurate measurement of magnetic fields. It incorporates a Hall effect sensor with automatic temperature compensation, ensuring reliable readings across various environmental conditions. This device is suitable for a range of applications requiring precise magnetic field analysis.
Figure 1: The Extech MF100 AC/DC Magnetic Field Meter, showing the main unit connected to its uniaxial magnetic probe sensor.
Features
- Utilizes Hall effect sensor with Automatic Temperature Compensation (ATC)
- N pole/S pole indicator for magnetic field direction
- Zero button for accurate DC measurement
- Data Hold function to freeze readings
- Min/Max recording for capturing extreme values
- Auto power off with disable feature to conserve battery life
Package Contents
Upon opening the package, please verify that all items are present and undamaged:
- Extech MF100 AC/DC Magnetic Field Meter
- Uniaxial Magnetic Probe Sensor
- Protective Cover for the probe
- 9V Battery (included)
- Hard Carrying Case
Safety Information
Please read and understand all safety precautions before operating the Extech MF100. Failure to follow these instructions may result in injury or damage to the device.
- Do not attempt to open the meter casing. Servicing should only be performed by qualified personnel.
- Keep the device away from strong electromagnetic fields that are not being measured, as this may affect accuracy.
- Ensure the battery compartment is securely closed before use.
- Dispose of batteries according to local regulations.
- Avoid dropping the meter or subjecting it to severe impact.
Setup
- Battery Installation: Open the battery compartment cover on the back of the meter. Insert the included 9V battery, observing the correct polarity. Close the cover securely.
- Probe Connection: Connect the uniaxial magnetic probe sensor cable to the input jack located at the top of the MF100 meter. Ensure the connection is firm.
- Protective Cover: Place the protective cover over the probe tip when not in use to prevent damage.
Operating Instructions
This section details the basic operation of the Extech MF100.
- Power On/Off: Press the POWER button to turn the meter on or off. The display will illuminate.
- Selecting AC/DC Mode: Press the MODE DC/AC button to toggle between AC (alternating current) and DC (direct current) magnetic field measurement modes. The selected mode will be indicated on the display.
- Zeroing for DC Measurement: Before taking DC measurements, press the ZERO button to calibrate the meter and eliminate any residual magnetic fields. This ensures accurate DC readings.
- Taking Measurements: Position the tip of the uniaxial magnetic probe sensor in the magnetic field you wish to measure. The reading will be displayed on the LCD. The N pole/S pole indicator will show the direction of the magnetic field.
- Data Hold: Press the HOLD button to freeze the current reading on the display. Press again to release.
- Min/Max Recording: Press the REC button once to enter Min/Max recording mode. The meter will continuously record the minimum and maximum values. Press REC again to cycle through Min, Max, and current readings. Press and hold REC to exit Min/Max mode.
- Auto Power Off: The meter will automatically power off after a period of inactivity to conserve battery. To disable this feature, refer to the full manual for specific button sequences during power-on.
Figure 2: The Extech MF100 being used by a technician to measure a magnetic field in a laboratory environment.
Figure 3: The Extech MF100 in use outdoors, demonstrating its portability and application in various field conditions.
Maintenance
- Cleaning: Wipe the meter and probe with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: When the low battery indicator appears on the display, replace the 9V battery promptly to ensure accurate operation.
- Storage: Store the meter in its hard carrying case in a cool, dry place when not in use. Remove the battery if storing for extended periods to prevent leakage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on | Dead or incorrectly installed battery | Replace battery, check polarity |
| Inaccurate DC readings | Not zeroed before measurement | Press the ZERO button before taking DC measurements |
| Erratic readings | Interference from other magnetic sources; damaged probe | Move away from other sources; inspect probe for damage |
Specifications
| Specification | Value |
|---|---|
| Model Number | MF100 |
| Product Dimensions (L x W x H) | 7.8 x 2.7 x 1.2 inches |
| Item Weight | 0.27 Kilograms (9.52 ounces) |
| Power Source | Battery Powered (2 Lithium Ion batteries required, included) |
| Sensor Type | Hall Effect with ATC |
| First Available Date | June 30, 2015 |
Warranty and Support
Warranty information for the Extech MF100 is typically provided with the product packaging or can be found on the official Extech website. For technical support, service, or to inquire about replacement parts, please visit the Extech Store on Amazon or the manufacturer's official website.
