UNI-T UT335 Digital Gauss Meter User Manual

1. Introduction

The UNI-T UT335 series is a range of handheld digital Gauss meters designed for precise magnetic field detection. These devices are suitable for measuring surface magnetic strength, residual magnetism in mechanical parts, and are widely used in production, mechanical manufacturing, metrology, and research. The series includes models UT335A, UT335B, and UT335C, offering varying levels of accuracy to meet diverse application requirements.

Figure 1: UNI-T UT335 Series Digital Gauss Meters

Product Overview Video

2. Safety Information

• Always operate the device within its specified operating conditions.
• Avoid exposing the device to extreme temperatures, humidity, or corrosive environments.
• Do not attempt to disassemble or modify the device, as this may void the warranty and pose safety risks.
• Keep the device away from strong electromagnetic fields that could interfere with its readings.
• Ensure the probe is handled carefully to prevent damage.
• Use only the provided or recommended charging accessories.

3. Product Overview

The UT335 series Gauss meter features a compact, handheld design with a full-color TFT LCD display for clear readings. It utilizes a Hall sensor for accurate magnetic field measurements.

Figure 2: UT335 Gauss Meter with labeled components.

Key Components:

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

4. Specifications

The following table details the technical specifications for the UNI-T UT335 series Gauss meters:

Figure 3: Technical Specifications for UT335 Series.

5. Setup

5.1 Unpacking

Carefully unpack the Gauss meter and check for all components. The standard package includes:

Figure 4: Product List for UT335 Series.

• Main Unit (UT335A/B/C)
• Hall Probe
• USB Type-C Charging Cable
• User Manual (Specification)
• Certificate of Conformity

5.2 Charging the Device

The UT335 series Gauss meter is equipped with a built-in 3.7V 750mAh lithium battery. To charge the device:

1. Connect the provided USB Type-C charging cable to the charging interface on the device.
2. Plug the other end of the USB cable into a standard USB power adapter (not included) or a computer's USB port.
3. The charging indicator on the screen will show the charging status.

Figure 5: Charging the UT335 Gauss Meter.

A full charge provides approximately 16 hours of continuous operation due to its low power consumption design.

5.3 Connecting the Hall Probe

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

6. Operating Instructions

6.1 Power On/Off and Zeroing

• Press and hold the power button to turn the device on or off.
• The device performs an automatic zeroing upon power-on.
• For manual zeroing, press the "ZERO" button. This is crucial for accurate measurements, especially when changing measurement environments.

6.2 Magnetic Field Measurement

The UT335 uses a Hall sensor to measure magnetic field strength. To take a measurement:

1. Ensure the device is powered on and zeroed.
2. Position the tip of the Hall probe close to the surface or area where you want to measure the magnetic field.
3. The real-time measurement value will be displayed on the full-color TFT LCD screen.
4. The screen also displays the magnetic pole (North/South), maximum value, hold value, and alarm limit.

Figure 6: Using the Hall sensor for magnetic field measurement.

Figure 7: Detailed view of the color display with measurement data.

6.3 Unit Switching (mT/Gs)

The device supports switching between milliTesla (mT) and Gauss (Gs) units. Refer to the on-screen menu or the user manual for specific button presses to toggle between these units.

6.4 Counting Speed Measurement Function

This function allows for measuring rotational speed, mileage, and number of turns. To use this feature:

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

Figure 8: Setup for counting speed measurement.

6.5 Quality Test Function

The one-key quality test function provides quick results, significantly improving work efficiency. This function can be used to determine if a magnetic field falls within a predefined acceptable range (upper and lower limits).

1. Navigate to the Quality Test menu on the device.
2. Place the probe on the item to be tested.
3. Press the "Test" button. The device will display a "Pass" (green checkmark) or "Fail" (red X) result based on the configured limits.

Figure 9: Quality test function in action, showing results.

6.6 Alarm Indication

The device features rich alarm methods. When the detected magnetic field value exceeds or falls below the set limit value, multiple alarm modes will activate simultaneously:

• Screen Display: Visual alerts on the LCD screen.
• Buzzing: Audible alarm.
• LED Lights: Visual indication via LED lamps.

Figure 10: Alarm methods for over-limit values.

6.7 Data Storage

The UT335 series can store up to 50 sets of test data for easy access and review. Refer to the device's menu for instructions on how to save and recall data.

Figure 11: Data storage feature displaying saved measurements.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
• Storage: Store the Gauss meter in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
• Probe Care: Handle the Hall probe with care. Avoid bending or subjecting it to physical shock, as this can affect its accuracy.
• Calibration: Regular calibration is recommended to maintain measurement accuracy, especially for models UT335B and UT335C with higher precision.

8. Troubleshooting

If you encounter issues with your UT335 Gauss Meter, try the following basic troubleshooting steps:

• Device not turning on: Ensure the battery is charged. Connect the device to a power source using the Type-C cable and try again.
• Inaccurate readings:
  • Perform a manual zeroing by pressing the "ZERO" button.
  • Check if the Hall probe is securely connected and undamaged.
  • Ensure there are no strong external magnetic fields interfering with the measurement.
• Display issues: If the screen is unresponsive or shows abnormal characters, try restarting the device.
• Alarm not working: Check the alarm settings in the device menu to ensure they are configured correctly.

If problems persist, contact customer support for further assistance.

9. User Tips

• For the most accurate readings, always perform a zero calibration before each critical measurement session.
• When measuring, ensure the Hall probe is perpendicular to the magnetic field lines for optimal results.
• Utilize the data storage function to keep a record of your measurements for analysis or quality control purposes.
• The different accuracy levels (UT335A: ±5%, UT335B: ±2%, UT335C: ±1%) make it suitable for various applications. Choose the model that best fits your precision needs.
• The color display provides comprehensive information at a glance, including real-time values, magnetic pole, and peak readings.

10. Warranty and Support

UNI-T products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the contact details provided in your product packaging or visit the official UNI-T website. Keep your purchase receipt as proof of purchase for warranty claims.