UNI-T Handheld Digital Gauss Meter UT335 Series Instruction Manual

1. Introduction

The UNI-T UT335 Series Handheld Digital Gauss Meter is a versatile instrument designed for precise magnetic field detection. Utilizing a Hall sensor, it offers a measurement range of 0-3000mT (30kGs) and features a full-color TFT LCD display. This series includes models UT335A, UT335B, and UT335C, each offering different levels of accuracy to suit various application needs. The device supports automatic and manual zeroing, unit switching between mT and Gs, magnetic pole display, data holding, peak value display, quality control tests, and counting speed measurement. It is widely used in production, mechanical manufacturing, measurement and testing, college research, and other fields.

2. Safety Information

Please read all safety warnings and instructions carefully before using the device to ensure safe and proper operation. Keep this manual for future reference.

• Do not attempt to open or modify the device, as this may void the warranty and pose safety risks.
• Keep the device away from water and other liquids.
• Avoid exposing the device to extreme temperatures or direct sunlight.
• Handle the Hall probe with care to prevent damage.
• Ensure the device is charged using the provided Type-C cable and a compatible power adapter.
• Do not use the device if it appears damaged or is not functioning correctly.

3. Package Contents

Verify that all items are present in the package:

• Packing box
• UT335A/UT335B/UT335C Main Unit (1 unit)
• Hall Probe (1 unit)
• USB Type-C Cable (1 unit)
• Instruction Manual (1 copy)
• Certificate of Conformity (1 copy)

4. Product Overview

The UT335 Series Gauss Meter features a user-friendly design with a clear color display and intuitive controls.

• Probe Interface: Connects the Hall probe to the main unit.
• Pilot Lamp: Indicates device status, such as charging or alarm.
• Screen: Full-color TFT LCD for displaying measurements, settings, and alerts.
• Key Area: Buttons for ZERO, HOLD, power, and navigation.
• Hall Probe: The sensor used for detecting magnetic fields.
• Charging Interface: Type-C port for charging the internal lithium battery.

5. Setup

5.1. Charging the Battery

The device is equipped with a built-in 3.7V 750mAh lithium battery. Before first use, or when the battery indicator shows low power, charge the device using the provided Type-C USB cable.

1. Connect the Type-C end of the USB cable to the charging interface on the Gauss meter.
2. Connect the other end of the USB cable to a standard USB power adapter (not included) or a computer's USB port.
3. The pilot lamp will indicate charging status. The screen will show a charging icon.
4. Charging is complete when the battery icon on the screen indicates full charge.

5.2. Connecting the Hall Probe

Carefully connect the Hall probe to the probe interface on the top of the main unit. Ensure a secure connection for accurate measurements.

6. Operation

6.1. Power On/Off

• To power on, press and hold the power button (usually located in the key area) until the screen illuminates.
• To power off, press and hold the power button again until the device shuts down.

6.2. Zeroing

The device supports both automatic and manual zeroing to ensure measurement accuracy.

• Automatic Zeroing: The device performs automatic zeroing upon power-on.
• Manual Zeroing: Press the 'ZERO' button in a magnetic-free environment to manually zero the reading.

6.3. Magnetic Field Measurement

Once powered on and zeroed, position the Hall probe near the magnetic field you wish to measure. The real-time measurement value will be displayed on the screen.

6.4. Unit Switching (mT/Gs)

The device allows switching between milliTesla (mT) and Gauss (Gs) units. Refer to the on-screen menu or dedicated button (if available) for unit selection.

6.5. Holding Value (HOLD)

Press the 'HOLD' button to freeze the current measurement on the screen. Press it again to resume real-time measurement.

6.6. Peak Value Display

The device can display the peak magnetic field value detected during a measurement session. Consult the manual for specific instructions on activating and viewing peak values.

6.7. Quality Control Test Function

This function allows for one-key testing to quickly determine if a magnetic field falls within predefined upper and lower limits, greatly improving work efficiency.

1. Navigate to the Quality Control Test function in the menu.
2. Set the upper and lower limits as required.
3. Place the probe near the object to be tested.
4. Press the 'Test' button. The screen will display 'Result: Pass' (green checkmark) or 'Result: Fail' (red X) along with the magnetic field value and polarity.

6.8. Counting Speed Measurement Function

This feature is useful for measuring the rotational speed, mileage, and number of turns of a rotating object with a fixed magnet.

1. Fix a magnet on the rotating wheel.
2. Position the probe close to the fixed magnet.
3. As the wheel rotates, the device will measure and display the corresponding rotational speed, mileage, speed, and number of turns.

6.9. Data Storage

The UT335 Series can store up to 50 sets of test data for easy access and review.

1. After a measurement, use the 'Save' option on the screen to store the data.
2. To view stored data, navigate to the data storage menu.

6.10. Alarm Methods

When the detected magnetic field value exceeds or falls below a set limit, the device will provide multiple simultaneous alarm indications:

• Screen display (visual alert)
• Buzzer (audible alert)
• LED lights (visual alert)

7. 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. If storing for extended periods, ensure the battery is partially charged (around 50%) to prolong its lifespan.
• Probe Care: Handle the Hall probe carefully. Avoid bending or subjecting it to physical shock. Keep the probe tip clean.
• Battery Life: The built-in lithium battery offers approximately 16 hours of continuous use on a full charge.

8. Troubleshooting

• Device does not power on: Ensure the battery is charged. Connect the device to a power source using the Type-C cable and try again.
• Inaccurate readings: Perform manual zeroing in a magnetic-free environment. Ensure the Hall probe is clean and properly connected. Avoid strong external magnetic fields during measurement.
• Screen is blank or frozen: Try restarting the device by holding the power button. If the issue persists, ensure the battery is charged.
• Alarm not working: Check the alarm settings in the device menu to ensure they are enabled and configured correctly.

9. Specifications

The UT335 series offers different accuracy levels:

• UT335A: ±5% accuracy
• UT335B: ±2% accuracy
• UT335C: ±1% accuracy

10. User Tips

• For the most accurate readings, always perform a zero calibration in an area free from magnetic interference before taking measurements.
• When measuring, ensure the Hall probe is positioned correctly and stably relative to the magnetic field source.
• Utilize the data storage function to keep track of multiple measurements, which can be helpful for comparative analysis or record-keeping.
• Pay attention to the alarm indicators (visual and audible) when working with magnetic fields that require specific limits.

11. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official UNI-T website. Keep your proof of purchase for warranty claims.

12. Product Video Demonstration

Watch this video for a visual guide on the features and operation of the UNI-T UT335 Series Handheld Digital Gauss Meter.