OWON B41T+ Digital Multimeter User Manual

1. Introduction

This manual provides comprehensive instructions for the safe and effective operation, setup, and maintenance of the OWON B41T+ Digital Multimeter. The B41T+ is a versatile 3-in-1 device, functioning as a datalogger, a multimeter, and a temperature meter. It incorporates True RMS measurement capabilities and a clear backlight for enhanced readability in various environments.

2. Safety Information

To ensure safe operation and prevent personal injury or damage to the device, please observe the following safety precautions:

• Always disconnect test leads from the circuit before changing functions or ranges.
• Do not exceed the maximum input limits specified for each function. Refer to the specifications section for details.
• Exercise extreme caution when working with live circuits. High voltages can be dangerous.
• Ensure the correct fuse rating is used when replacing fuses. Incorrect fuses can lead to damage or fire.
• Inspect test leads for damage before each use. Do not use damaged leads.
• Do not operate the multimeter if it appears damaged or is not functioning properly.
• Keep the device dry. Avoid exposure to moisture or extreme temperatures.

3. Package Contents

Upon opening the package, verify that all the following items are included:

• 1x OWON B41T+ Multimeter
• 1x Multimeter Lead Set (Red and Black)
• 1x K-Type Thermocouple
• 1x Alligator Clip Set
• 1x Multi-function Test Bench
• 1x User Manual (English)
• 1x Carry Bag

4. Product Overview

The OWON B41T+ Digital Multimeter features a robust design with a clear digital display, a central rotary function dial, and various input terminals for different measurement types.

4.1. Key Components

• Display: 4(1/2)-digit LCD with backlight, capable of showing 21999 counts.
• Function Dial: Rotary switch to select measurement modes (e.g., Voltage, Current, Resistance, Temperature).
• Buttons: Include Select, Range, Hz/Duty, Max/Min, Backlight, and Data Hold functions.
• Input Jacks: Dedicated terminals for test leads, including COM (common), VΩHz, mAµA, and 20A inputs.

5. Setup

5.1. Battery Installation

The OWON B41T+ requires two 1.5V AA batteries for operation. Batteries are typically included with the device.

1. Ensure the multimeter is powered OFF.
2. Locate the battery compartment on the rear of the device.
3. Use a screwdriver to open the battery compartment cover.
4. Insert two AA batteries, observing the correct polarity (+ and -) as indicated inside the compartment.
5. Replace the battery compartment cover and secure it with the screw.

5.2. Connecting Test Leads

Proper connection of test leads is crucial for accurate and safe measurements.

• Connect the black test lead to the COM (common) input jack.
• For most voltage, resistance, frequency, diode, and continuity measurements, connect the red test lead to the VΩHz input jack.
• For current measurements (mA/µA), connect the red test lead to the mAµA TEMP input jack.
• For high current measurements (up to 20A), connect the red test lead to the 20A input jack.

6. Operating Instructions

6.1. Basic Measurement Procedure

1. Connect the test leads as described in Section 5.2.
2. Turn the function dial to the desired measurement mode.
3. Connect the test probes to the circuit or component under test.
4. Read the measurement value on the display.

6.2. Function Selection

Use the rotary dial to select the primary measurement function:

• OFF: Powers off the device.
• =mV / =V: DC Voltage measurement (millivolts/volts).
• ~mV / ~V: AC Voltage measurement (millivolts/volts).
• Ω: Resistance measurement.
• Continuity / Diode: For continuity checks and diode testing.
• Hz%: Frequency and Duty Cycle measurement.
• TEMP: Temperature measurement using the K-type thermocouple.
• µA / mA / A: Current measurement (microamperes/milliamperes/amperes).

6.3. Button Functions

• Select: Toggles between sub-functions within a dial position (e.g., AC/DC, Continuity/Diode).
• Range: Manually selects the measurement range. The device also supports auto-ranging.
• Hz/Duty: Activates frequency or duty cycle measurement.
• Max/Min: Records and displays the maximum and minimum values measured.
• Backlight: Toggles the display backlight for improved visibility.
• Data Hold (H): Freezes the current reading on the display.

6.4. Data Logging and Bluetooth Connectivity

The OWON B41T+ features Bluetooth connectivity, allowing it to interface with a mobile application for advanced data logging and analysis.

• Multi-connection: The mobile app supports monitoring of more than one device simultaneously, enhancing measurement safety and flexibility.
• Offline Recording: The device can record up to 10,000 data points over a period of 168 hours (7 days) without being continuously connected to the app. This data can be downloaded later.
• Trend Analysis: The mobile app provides a special chart mode for analyzing measurement trends over time.
• Voice Warning & Reading: The app offers voice warnings for measurement safety and smart voice-reading of measurements.

Refer to the specific mobile application's instructions for detailed guidance on pairing and using these advanced features.

7. Maintenance

7.1. Cleaning

To maintain the device's performance and appearance:

• Wipe the casing with a soft, damp cloth.
• Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the plastic components.
• Ensure the device is powered off and disconnected from any circuits before cleaning.

7.2. Battery Replacement

When the low-battery indicator appears on the display, replace the batteries promptly to ensure accurate readings.

1. Power off the multimeter and disconnect all test leads.
2. Open the battery compartment cover on the rear of the device (refer to Section 5.1).
3. Remove the old AA batteries.
4. Insert new 1.5V AA batteries, ensuring correct polarity.
5. Securely close the battery compartment cover.

7.3. Fuse Replacement

If the current measurement functions cease to work, the internal fuse may need replacement. Refer to the device's internal markings or the full technical manual for specific fuse ratings and replacement procedures. Always use a fuse with the correct voltage and current rating.

7.4. Storage

For long-term storage, remove the batteries to prevent leakage and store the multimeter in its carry bag in a cool, dry place, away from direct sunlight and extreme temperatures.

8. Troubleshooting

This section addresses common issues you might encounter with your OWON B41T+ Multimeter.

• No Display or Faint Display:
  Check battery installation and ensure batteries are not depleted. Replace batteries if necessary.
• Incorrect Readings:
  Verify that the function dial is set to the correct measurement mode. Ensure test leads are properly connected to the correct input jacks. Check for damaged test leads.
• Current Measurement Not Working:
  The internal fuse for current measurement may be blown. Refer to Section 7.3 for fuse replacement guidance.
• Bluetooth Connectivity Issues:
  Ensure Bluetooth is enabled on your mobile device. Confirm the OWON B41T+ is powered on and within range. Restart both the multimeter and the mobile application.
• Device Powers Off Unexpectedly:
  The multimeter has a smart power-off feature to conserve battery life. If it powers off too frequently, check battery level. This feature can often be configured or disabled via the mobile app or specific button combinations (refer to the full manual).

9. Specifications

10. Warranty and Support

For detailed warranty information, technical support, or service inquiries regarding your OWON B41T+ Digital Multimeter, please refer to the official OWON website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.