OWON OW18E Bluetooth Digital Multimeter User Manual

1. Introduction

This manual provides detailed instructions for the safe and effective operation of your OWON OW18E Bluetooth Digital Multimeter. The OW18E is a versatile, auto-ranging digital multimeter designed for various electrical measurements, including voltage, current, resistance, capacitance, frequency, duty cycle, and temperature. It features True RMS measurement, non-contact voltage detection, a large backlit display, and Bluetooth connectivity for data logging and analysis on mobile devices.

2. Safety Information

To ensure safe operation and avoid damage to the meter, please read and follow all safety instructions carefully. Improper use can result in electric shock or damage to the instrument.

• Always ensure the multimeter is in the correct function and range before making measurements.
• Do not exceed the maximum input values for any range.
• Inspect test leads for damage before each use. Replace if insulation is compromised.
• Do not use the meter if it appears damaged or is not operating properly.
• Exercise extreme caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
• Remove the test leads from the circuit before changing functions or ranges.
• Remove the cap from the test leads before use.

3. Product Overview

The OWON OW18E is a high-precision digital multimeter equipped with various features for professional and hobbyist use.

Figure 3.1: OWON OW18E Digital Multimeter and included accessories.

Key Features:

• True RMS Measurement: Provides accurate readings for non-sinusoidal waveforms.
• 20000 Counts Display: High resolution for precise measurements.
• Bluetooth 4.0 Connectivity: Allows for real-time data transfer and offline recording to a mobile device.
• Non-Contact Voltage (NCV) Detection: Safely detects AC voltage without direct contact.
• Auto-Ranging: Automatically selects the appropriate measurement range.
• Data Hold: Freezes the displayed reading.
• Min/Max/Average Recording: Captures minimum, maximum, and average values over time.
• Large Backlit LCD Display: Ensures clear readability in various lighting conditions.
• Integrated Flashlight: Illuminates dimly lit work areas.
• Stable Kickstand and Pen Slot: For convenient hands-free operation and storage.
• Low Battery Indication: Alerts when battery replacement is needed.
• Auto Power-Off: Conserves battery life.

4. Parts Identification

Familiarize yourself with the components of your OWON OW18E multimeter.

Figure 4.1: Front and rear view of the OWON OW18E with key components labeled.

1. LED Indicator: Provides visual feedback for certain functions.
2. LCD Display: Shows measurement readings and function icons.
3. Keypad: Buttons for selecting functions and modes.
4. Rotary Switch: Selects the primary measurement function.
5. Input Terminals: Sockets for connecting test leads (COM, VΩHz, mA, 20A).
6. Flashlight: Provides illumination for dark environments.
7. Non-Contact Voltage (NCV) Detector: Sensor for detecting AC voltage without direct contact.
8. Support Stand: Allows the meter to stand upright for hands-free viewing.

5. Setup

5.1 Battery Installation

The OWON OW18E is powered by a 9V battery (included). To install or replace the battery:

1. Ensure the multimeter is turned OFF and test leads are disconnected.
2. Locate the battery compartment cover on the back of the meter.
3. Unscrew the retaining screw(s) and remove the cover.
4. Connect the 9V battery to the battery clip, observing correct polarity.
5. Place the battery into the compartment and replace the cover, securing it with the screw(s).

5.2 Test Lead Connection

Connect the test leads to the appropriate input terminals for your desired measurement:

• Always connect the black test lead to the COM (Common) terminal.
• For voltage, resistance, capacitance, frequency, duty cycle, and diode measurements, connect the red test lead to the VΩHz terminal.
• For current measurements up to 200mA, connect the red test lead to the mA terminal.
• For current measurements up to 20A, connect the red test lead to the 20A terminal.

Note: Remove the protective caps from the test leads before use.

5.3 Mobile App Installation (for Bluetooth Functionality)

To utilize the Bluetooth data logging and analysis features, download the OWON multimeter application for your mobile device (Android, iOS) or Windows PC. Refer to the OWON website or your device's app store for the latest version and installation instructions.

Figure 5.1: Bluetooth 4.0 communication for displaying and downloading data to a mobile device.

6. Operating Instructions

This section details how to perform various measurements and utilize the special functions of the OWON OW18E multimeter.

6.1 Basic Measurements

6.1.1 Voltage Measurement (DC/AC)

1. Set the rotary switch to the V (Voltage) position.
2. Connect the black test lead to the COM terminal and the red test lead to the VΩHz terminal.
3. Press the SELECT button to toggle between DC and AC voltage measurement if necessary.
4. Connect the test probes in parallel to the circuit or component under test.
5. Read the voltage value on the LCD display.

Figure 6.1: Examples of DC and AC voltage measurement.

6.1.2 Current Measurement (DC/AC)

1. Set the rotary switch to the mA or 20A position, depending on the expected current.
2. Connect the black test lead to the COM terminal. Connect the red test lead to the mA terminal for low current or the 20A terminal for high current.
3. Press the SELECT button to toggle between DC and AC current measurement if necessary.
4. CAUTION: Connect the meter in series with the circuit. Do not connect in parallel across a voltage source.
5. Read the current value on the LCD display.

6.1.3 Resistance Measurement

1. Set the rotary switch to the Ω (Resistance) position.
2. Connect the black test lead to the COM terminal and the red test lead to the VΩHz terminal.
3. Ensure the circuit or component under test is de-energized before measuring resistance.
4. Connect the test probes across the component.
5. Read the resistance value on the LCD display.

6.1.4 Continuity Test

1. Set the rotary switch to the Ω (Resistance) position. Press SELECT until the continuity symbol ()))) appears.
2. Connect the black test lead to the COM terminal and the red test lead to the VΩHz terminal.
3. Connect the test probes across the circuit or component.
4. If continuity exists (resistance below a certain threshold), the meter will emit an audible beep.

6.1.5 Diode Test

1. Set the rotary switch to the Ω (Resistance) position. Press SELECT until the diode symbol (→|) appears.
2. Connect the black test lead to the COM terminal and the red test lead to the VΩHz terminal.
3. Connect the red probe to the anode and the black probe to the cathode of the diode. The display will show the forward voltage drop.
4. Reverse the probes. The display should show "OL" (Open Loop) for a good diode.

6.1.6 Capacitance Measurement

1. Set the rotary switch to the F (Capacitance) position.
2. Connect the black test lead to the COM terminal and the red test lead to the VΩHz terminal.
3. Ensure the capacitor is fully discharged before measurement.
4. Connect the test probes across the capacitor.
5. Read the capacitance value on the LCD display.

6.1.7 Frequency (Hz) and Duty Cycle (%) Measurement

1. Set the rotary switch to the Hz% position.
2. Connect the black test lead to the COM terminal and the red test lead to the VΩHz terminal.
3. Press the SELECT button to toggle between Frequency and Duty Cycle.
4. Connect the test probes in parallel to the signal source.
5. Read the frequency or duty cycle value on the LCD display.

6.1.8 Temperature Measurement

1. Set the rotary switch to the °C/°F (Temperature) position.
2. Connect the temperature probe (if included) to the VΩHz and COM terminals, observing polarity.
3. Press the SELECT button to toggle between Celsius and Fahrenheit.
4. Place the tip of the temperature probe on or near the object whose temperature is to be measured.
5. Read the temperature value on the LCD display.

6.2 Special Functions

6.2.1 Non-Contact Voltage (NCV) Detection

The NCV function allows for detection of AC voltage without direct contact with conductors.

1. Set the rotary switch to the NCV position.
2. Move the NCV sensor (located at the top of the meter) close to the conductor or outlet.
3. The meter will emit an audible beep and the LED indicator will flash, with the frequency increasing as the voltage strength increases.

Figure 6.2: Non-contact voltage testing with audible and visual alarm.

6.2.2 Bluetooth Data Logging and Offline Recording

The OW18E can connect to a mobile device via Bluetooth to log measurement data and perform offline recording.

1. Ensure the multimeter is ON and Bluetooth is enabled on your mobile device.
2. Open the OWON multimeter application on your device.
3. Follow the app's instructions to pair with the OW18E multimeter.
4. Once connected, you can view real-time measurements, record data over time, and download logged data for analysis.

Figure 6.3: Multi-device Bluetooth connection for data logging.

6.2.3 Min/Max/Average Recording

This function allows the meter to record the minimum, maximum, and average values of a measurement over a period.

1. Select the desired measurement function (e.g., Voltage, Current).
2. Press the MIN/MAX button. The meter will start recording.
3. Press MIN/MAX repeatedly to cycle through MIN, MAX, and AVG values.
4. To exit, press and hold the MIN/MAX button.

6.2.4 Data Hold

Press the HOLD button to freeze the current reading on the display. Press it again to release the hold function.

6.2.5 Auto Power-Off (APO)

The meter automatically turns off after a period of inactivity to conserve battery life. This feature can typically be disabled or adjusted via the mobile application or specific button combinations (refer to the full product manual for advanced settings).

7. Maintenance

7.1 Cleaning

Wipe the meter casing with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the meter is dry before use.

7.2 Battery Replacement

When the low battery indicator appears on the display, replace the 9V battery as described in Section 5.1.

7.3 Fuse Replacement

If the current measurement function fails, the fuse(s) may need replacement. Refer to the full product manual for fuse specifications and replacement procedures. Always use fuses of the specified type and rating.

8. Troubleshooting

If you encounter issues with your OWON OW18E multimeter, refer to the following common troubleshooting steps:

• No Display/Power: Check battery installation and charge level. Replace battery if necessary.
• Incorrect Readings: Ensure test leads are correctly connected to the appropriate terminals and the rotary switch is set to the correct function and range. Verify the circuit is de-energized for resistance/continuity tests.
• No Continuity Beep: Check if the continuity function is selected. Ensure probes are making good contact.
• Bluetooth Connection Issues: Ensure Bluetooth is enabled on both the meter and your mobile device. Restart both devices and the application. Check app permissions.
• Current Measurement Failure: Check the fuse(s) for the current input terminals.

For further assistance, contact OWON technical support.

9. Specifications

Detailed technical specifications for the OWON OW18E Digital Multimeter.

9.1 General Specifications

• Product Dimensions: 8.66 x 6.3 x 3.15 inches
• Item Weight: 1.28 Pounds
• Model Number: O-18E
• Manufacturer: OWON
• Power Source: Battery Powered (9V)
• Color: Green (referring to the casing color)
• Display: 20000 Counts
• Sample Rate: 3 times/second
• Frequency Response (AC): 40 - 1000Hz

9.2 Measurement Ranges and Accuracy

Figure 9.1: Detailed measurement ranges and accuracy specifications.

10. Warranty and Support

The OWON OW18E Digital Multimeter comes with lifetime technical support. For warranty claims, technical assistance, or further inquiries, please contact OWON customer service through their official website or the retailer where the product was purchased.