1. Nhanganyaya
The OWON OW18B is a 3-5/6 bit resolution Bluetooth Digital Multimeter designed for precise electrical measurements. It functions as a multimeter, thermometer, and data logger, offering advanced features such as True RMS, Non-Contact Voltage (NCV) detection, and a built-in flashlight. With Bluetooth 4.0 connectivity, it allows for wireless data transmission to Android, iOS, and Windows devices, enabling multi-device connection, single-display monitoring, and data analysis through charts and diagrams. The device also includes a voice broadcast function and supports offline recording for up to 7 days.

Figure 1: OWON OW18B Digital Multimeter
2. Safety Information
To ensure safe operation and avoid damage to the meter, please read this manual carefully before use. Adhere to all safety warnings and precautions.
- Always ensure the test leads are correctly connected to the appropriate input terminals for the measurement being performed.
- Do not exceed the maximum input limits for any function. The OW18B is rated for 1000V CAT III and 600V CAT IV.
- Chenjerera zvakanyanya paunenge uchishanda nevoltages pamusoro pe30V AC RMS, 42V peak, kana 60V DC. Aya voltages inokonzeresa njodzi.
- Before measuring current, ensure the circuit is de-energized and the meter is connected in series with the load.
- Tsiva bhatiri ipapo ipapo kana chiratidzo chebhatiri chidiki chaonekwa kuti chive nechokwadi chekuti bhatiri rakanyorwa nemazvo.
- Usashandise mita kana ichiita seyakakuvadzwa kana kesi yakavhurwa.
- Use only specified replacement parts when servicing the meter.
- Chengeta minwe yako iri kumashure kwezvidziviriro zveprobe panguva yekuyera.
3. Chigadzirwa Pamusoroview
The OWON OW18B features a robust design with a clear digital display and an intuitive rotary dial for function selection. Key components include:
- Chiratidziro cheLCD: Inoratidza kuyerwa kuverenga, mayuniti, uye zviratidzo zvebasa.
- Shanduko yeRotary: Selects measurement modes (Voltage, Zvazvino, Kuramba, nezvimwewo).
- Input Jacks: Terminals for connecting test leads (VΩHz, mA, 20A, COM).
- Mabhatani: For range selection, data hold, backlight, flashlight, and NCV activation.
- Kickstand: Allows for hands-free operation.

Figure 2: OWON OW18B with integrated kickstand for convenient viewing.
4. Setup
4.1 Kuiswa kwebhatiri
The OW18B requires a 9V battery for operation.
- Ensure the multimeter is powered off.
- Tsvaga chivharo chebhatiri kuseri kwemudziyo.
- Vhura siruu (s) yekuchengeta uye bvisa kavha.
- Connect a new 9V battery to the battery clips, observing correct polarity.
- Isa bhatiri mukamuri uye wotsiva chivharo, uchichengetedza ne screw(s).
4.2 Test Lead Connection
Connect the test leads to the appropriate input jacks based on the desired measurement:
- COM Jack: Always connect the black test lead to the COM (Common) jack.
- VΩHz Jack: Connect the red test lead for Voltage, Kuyerwa kweKuramba, Kuwanda, Kukwanisa, Diode, uye Kuenderera mberi.
- mA Jack: Connect the red test lead for current measurements up to 600mA.
- 20A Jack: Connect the red test lead for current measurements up to 20A.
4.3 Kubatanidza Bluetooth App
The OW18B supports Bluetooth 4.0 for wireless data transmission to a mobile application (Android/iOS) or Windows software.
- Download the official OWON multimeter application from your device's app store (e.g., Google Play Store, Apple App Store) or the OWON website for Windows software.
- Ensure Bluetooth is enabled on your mobile device or computer.
- Power on the OW18B multimeter.
- Open the OWON application. The app should automatically detect and connect to the OW18B. Follow any on-screen prompts for pairing if necessary.
- Kana wangobatanidzwa, unogona view real-time measurements, log data, and analyze trends within the application.
5. Operating Instructions
5.1 Kudzima/Kubatidza uye Kusarudza Basa
To power on the multimeter, rotate the function switch from "OFF" to the desired measurement function. To power off, rotate the switch back to "OFF".
5.2 voltage Kuyera (AC/DC)
- Connect the black lead to the COM jack and the red lead to the VΩHz jack.
- Rotate the function switch to the V~ (AC Voltage) kana V- (DC Voltage) chinzvimbo.
- Bata ma probes ekuyedza kusvika panzvimbo dzedunhu panowanikwa voltage inofanira kuyerwa.
- Verenga bhukutage value on the display. The meter supports True RMS for AC measurements.
5.3 Chiyero Chazvino (AC/DC)
Yambiro: Never connect the meter in parallel to a voltage source when measuring current. This can damage the meter and pose a safety risk.
- For mA: Connect the black lead to COM and the red lead to the mA jack.
- For 20A: Connect the black lead to COM and the red lead to the 20A jack.
- Rotate the function switch to the A~ (AC Current) or A- (DC Current) position.
- Vhura dunhu rinofanira kuyerwa magetsi wobva wabatanidza mita yacho muzvikamu zvakatevedzana.
- Verenga kukosha kwazvino kuri pachiratidziro.
5.4 Resistance, Continuity, Diode, and Capacitance Measurement
- Connect the black lead to COM and the red lead to the VΩHz jack.
- Rotate the function switch to the Ω (Resistance), →| (Diode), or •))) (Continuity) position. Use the "Select" button to cycle through these functions if they share a single switch position.
- For resistance, connect probes across the component. For continuity, a beep indicates a continuous circuit. For diode, connect across the diode. For capacitance, connect across the capacitor.
- Verenga kuyerwa kuri pachiratidziro.
5.5 Frequency and Duty Cycle Measurement
- Connect the black lead to COM and the red lead to the VΩHz jack.
- Rotate the function switch to the Hz/% position.
- Batanidza probes kune iyo chiratidzo sosi.
- Read the frequency (Hz) or duty cycle (%) on the display.
5.6 Kuyera Kwekupisa
The OW18B includes a K-type thermocouple for temperature measurements.
- Ensure the multimeter is off.
- Batanidza thermocouple yerudzi rweK kuVΩHz neCOM jacks, uchicherechedza polarity.
- Rotate the function switch to the °C/°F position.
- Isa thermocouple tip pa kana pedyo nechinhu chine tembiricha inofanira kuyerwa.
- Read the temperature on the display. Use the "Select" button to switch between Celsius and Fahrenheit.
5.7 Vasina-Kubata Voltage (NCV) Kuonekwa
Basa reNCV rinobvumira kuona AC voltage pasina kuonana kwakananga.
- Rotate the function switch to the NCV position.
- Move the top front part of the multimeter close to the conductor or outlet.
- The meter will emit an audible beep and the NCV indicator light will flash, indicating the presence of AC voltage.
5.8 Basa reTochi
The built-in flashlight illuminates dark work areas.
- Press the flashlight button (often labeled with a lightbulb icon) to turn the flashlight on or off.

Figure 3: OWON OW18B demonstrating the flashlight function.
5.9 Data Logging and Voice Broadcast
When connected via Bluetooth to the OWON app, the multimeter can log data and provide voice broadcast of readings.
- Data Logging: Activate logging within the mobile application. The meter also supports built-in offline recording for up to 7 days, which can be retrieved via the app.
- Voice Broadcast: Enable this feature in the app settings to hear readings audibly, which can be useful in situations where viewing the display is difficult.
6. Kuchengeta
6.1 Kuchenesa
Pukuta bhokisi remita nekushambadziraamp cloth and mild detergent. Do not use abrasives or solvents. Ensure the meter is powered off and disconnected from any circuits before cleaning.
6.2 Kutsiviwa kwebhatiri
Refer to Section 4.1 for battery installation instructions. Replace the 9V battery when the low battery indicator appears on the display.
6.3 Fuse Kutsiva
If the current measurement function fails, the fuse may need replacement.
- Ensure the multimeter is powered off and all test leads are disconnected.
- Open the battery compartment cover as described in Section 4.1.
- Locate the fuse(s) inside the compartment. The OW18B typically uses two fuses: a fast-acting 600mA/250V fuse for the mA range and a fast-acting 20A/250V fuse for the 20A range.
- Carefully remove the blown fuse and replace it with a fuse of the exact same type and rating.
- Tsiva chivharo chebhatiri uye chengetedza.
6.4 Kuchengeta
When not in use for extended periods, remove the battery to prevent leakage. Store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Kugadzirisa matambudziko
| Dambudziko | Zvinogona Kukonzera | Solution |
|---|---|---|
| Chiyero chemita hachibatidzi. | Bhatiri rafa kana kuti rakaiswa zvisirizvo. | Check battery polarity and replace with a new 9V battery if necessary. |
| Hapana kuverenga kana "OL" (Overload) kunoratidzwa. | Basa rakasarudzwa zvisirizvo, dunhu rakavhurika, kana chiyero chinodarika daro. | Verify function switch position, check circuit continuity, or select a higher range if available. |
| Kuyera kwazvino hakusi kushanda. | Fuse inoputika. | Replace the appropriate fuse as described in Section 6.3. |
| Bluetooth nyaya dzekubatanidza. | Bluetooth off on device, app not running, or interference. | Ensure Bluetooth is enabled on your mobile device, restart the app, and ensure the multimeter is within range. |
| Dhigi rekushandisa files not found on phone. | App storage permissions, incorrect save path, or app specific issue. | Check app permissions for storage access. Consult the app's help section or OWON support for specific file locations. Ensure the app is updated to the latest version. |
8. Zvinotsanangurwa
| Feature | Detail |
|---|---|
| Model | OW18B |
| Display | 3-5/6 bit resolution, 6000 counts |
| Chokwadi RMS | Inotsigirwa |
| Isiri-Yekubatanidza Voltage (NCV) | Inotsigirwa |
| Bluetooth | BT 4.0 wireless transmission |
| Data Logging | Built-in offline record (up to 7 days), app-based logging |
| Voice Broadcast | Inotsigirwa |
| Tochi | Integrated |
| Temperature Test | K-type thermocouple included |
| Simba Source | Bhatiri re9V (harina kubatanidzwa) |
| Dimensions (L x W x H) | 19.60 x 8.85 x 5.60 masendimita / 7.72 x 3.48 x 2.2 inches |
| Product Weight | 0.30 kg / 0.66 lbs (approx.) |
| Mugadziri | LILLIPUT (Brand: OWON) |
| Safety Rating | 1000V CAT III, 600V CAT IV |
9. Warranty uye Tsigiro
For warranty information, technical support, or service inquiries, please contact the manufacturer or your authorized dealer. Keep your purchase receipt as proof of purchase.
For the latest software updates and additional resources, please visit the official OWON website.