1. Product Overview
1.1 Principle of Operation
The KANETEC TM-801EXP Tesla/Gauss Meter is an electronic magnetic flux density measuring instrument based on the Hall Effect principle. The Hall Effect describes the phenomenon where, when current flows through a semiconductor, a magnetic field applied perpendicular to the current creates a voltage difference proportional to the magnetic flux density (Hall voltage).
The TM-801EXP uses this principle to convert magnetic flux density into an electrical signal, which is then amplified and displayed digitally on the LCD screen. It can measure both DC magnetic fields and AC magnetic fields (40–500 Hz, sine wave), while automatically identifying the polarity (N/S) of the magnetic field.
1.2 Key Features
- Electronic design: compact and lightweight, weighing only about 250 g.
- Wide measurement range: 0–3000 mT, suitable for weak to strong fields.
- High resolution: minimum resolution of 0.01 mT (0.1 G).
- Multiple modes: measures both DC and AC flux density; automatically displays N/S polarity.
- Large LCD display: clear digital reading.
- Data output: supports USB digital output and analog output for PC connection and data logging.
- Energy saving: auto power-off in about 15 minutes to conserve battery.
- No recalibration required: probe replacement does not require additional calibration.
1.3 Typical Applications
- Measuring the flux density of electric motors, generators, and transformers.
- Testing permanent magnets to check performance or demagnetization.
- Measuring residual magnetism in processed parts, steel materials, or bearings.
- Research on magnetic materials in laboratories.
- Detecting the condition of stainless steel through magnetic response.
- Evaluating the effectiveness of magnetic shielding materials.
2. Operation Instructions
2.1 Parts and Controls
- ON/OFF: power switch; press and hold for about 2 seconds to turn on.
- AC/DC switch: toggles between AC and DC field measurement.
- REAL/HOLD: switches between real-time display and peak hold mode.
- ZERO/RESET: forces reset to eliminate residual magnetism in the probe.
- LCD display: shows magnetic field value, unit (mT/G), polarity (N/S), and mode.
- Output ports: USB digital output, analog output, and external DC power input.
2.2 Measurement Procedure
- Insert four AA 1.5V batteries or connect to an external DC 6V power supply.
- Press and hold ON/OFF for 2 seconds to start; unit defaults to mT.
- Gently place the probe onto the surface of the object under test—do not press forcefully to avoid probe damage.
- Select DC or AC mode depending on the application:
- DC mode: measures DC flux density and automatically shows N/S polarity.
- AC mode: measures AC flux density in the 40–500 Hz sine wave range.
- Press REAL/HOLD to switch between continuous real-time reading and peak hold mode.
- After measurement, press ON/OFF to turn off, or the instrument will power off automatically after about 15 minutes.
2.3 Precautions
- The probe is delicate—handle with care, and never apply excessive force.
- Always return the probe to its protective case after use.
- When the low battery icon appears on the LCD, replace all batteries.
- Not suitable for electromagnetic wave measurement; only for static or low-frequency fields.
3. Calibration and Maintenance
3.1 Calibration Methods
- Automatic zeroing: press ZERO/RESET to quickly eliminate zero drift.
- Standard calibration blocks: for high accuracy, use KANETEC TM-SMF standard magnetic field blocks to compare values.
- Probe replacement: probes are pre-calibrated by the manufacturer; replacement does not require additional calibration.
3.2 Routine Maintenance
- Clean the unit regularly to prevent dust buildup around the connectors.
- Remove batteries during long-term storage to prevent leakage.
- Operate within the recommended environment: 0–40°C, 35–85% RH.
- Always use the carrying case during transport to protect the probe.
4. Common Faults and Troubleshooting
4.1 Power Failure
Cause: Batteries depleted or poor battery contact.
Solution: Replace with fresh batteries and check polarity.
4.2 Unstable Reading
Cause: Probe not zeroed, or strong electromagnetic interference nearby.
Solution: Press ZERO/RESET to reset, or move away from interference sources.
4.3 Large Measurement Error
Cause: Probe damage or aging.
Solution: Replace probe or recalibrate with standard blocks.
4.4 Polarity Not Detected
Cause: Magnetic field too weak or incorrect probe placement.
Solution: Ensure close probe contact; if field is too weak, use high-sensitivity DC×10 mode.
4.5 No Output from USB Port
Cause: Driver not installed or cable defective.
Solution: Install the official software/driver or replace USB cable.
5. Technical Specifications
| Item | Specification |
|---|---|
| Model | TM-801EXP |
| Measurement Range | 0–3000.0 mT |
| Resolution | 0.01 mT (DC×10), 0.1 mT (AC/DC×1) |
| Modes | DC / AC (40–500 Hz) |
| Accuracy | ±(3–5% of reading + digit error) |
| Unit | mT / G selectable |
| Polarity | N / S automatic detection |
| Functions | Zero reset, peak hold, auto power-off |
| Output | USB digital, analog output |
| Power Supply | 1.5V AA ×4 or DC 6V external |
| Operating Environment | 0–40°C, 35–85% RH |
| Dimensions | 140(H) × 64(W) × 30(T) mm |
| Weight | Approx. 250 g (with battery and probe) |
| Standard Accessories | Probe, protective case, batteries, manual |
| Optional Accessories | TM-601DTC data cable, TM-SMF standard magnetic blocks |
6. Conclusion
The KANETEC TM-801EXP Tesla/Gauss Meter is a lightweight, precise, and multifunctional magnetic field measurement tool. Using Hall Effect technology, it provides accurate DC and AC flux density readings, identifies magnetic polarity, and supports data logging through PC connections.
Its wide range of applications includes industrial inspection, magnetic material research, residual magnetism detection, and shielding evaluation. By following the recommended operating procedures, performing routine calibration and maintenance, and applying proper troubleshooting measures, users can ensure reliable performance and extend the service life of the instrument.
The TM-801EXP is thus a professional-grade tool combining portability, accuracy, and versatility, making it indispensable in both laboratory and industrial environments.