1. Introducció
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. Informació de seguretat
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.
- Aneu amb extrema precaució quan treballeu amb voltagper sobre de 30 V CA RMS, 42 V pic o 60 V CC. Aquests voltagsuposen un risc de xoc.
- Abans de mesurar el corrent, assegureu-vos que el circuit estigui desenergitzat i que el mesurador estigui connectat en sèrie amb la càrrega.
- Substituïu la bateria immediatament quan aparegui l'indicador de bateria baixa per garantir lectures precises.
- No feu funcionar el mesurador si sembla danyat o si la carcassa està oberta.
- Use only specified replacement parts when servicing the meter.
- Mantingueu els dits darrere de les barreres de la sonda durant les mesures.
3. Producte acabatview
The OWON OW18B features a robust design with a clear digital display and an intuitive rotary dial for function selection. Key components include:
- Pantalla LCD: Mostra lectures de mesura, unitats i indicadors de funció.
- Funció Interruptor rotatiu: Selects measurement modes (Voltage, corrent, resistència, etc.).
- Preses d'entrada: Terminals for connecting test leads (VΩHz, mA, 20A, COM).
- Botons: For range selection, data hold, backlight, flashlight, and NCV activation.
- Suport de peu: Allows for hands-free operation.

Figure 2: OWON OW18B with integrated kickstand for convenient viewing.
4. Configuració
4.1 Instal·lació de la bateria
The OW18B requires a 9V battery for operation.
- Assegureu-vos que el multímetre estigui apagat.
- Localitzeu la tapa del compartiment de la bateria a la part posterior del dispositiu.
- Descargoleu el(s) cargol(s) de subjecció i traieu la coberta.
- Connect a new 9V battery to the battery clips, observing correct polarity.
- Col·loqueu la bateria al compartiment i torneu a col·locar la tapa, fixant-la amb el(s) cargol(s).
4.2 Connexió del cable de prova
Connecteu els cables de prova a les preses d'entrada adequades segons la mesura desitjada:
- COM Jack: Always connect the black test lead to the COM (Common) jack.
- VΩHz Jack: Connect the red test lead for Voltage, Mesures de resistència, freqüència, capacitança, díode i continuïtat.
- Jack mA: Connect the red test lead for current measurements up to 600mA.
- Jack de 20A: Connect the red test lead for current measurements up to 20A.
4.3 Bluetooth App Connection
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.
- Un cop connectat, pots view real-time measurements, log data, and analyze trends within the application.
5. Instruccions de funcionament
5.1 Engegada/Apagada i Selecció de Funcions
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 voltagMesura (CA/CC)
- 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) o V- (Volum de corrent continutage) posició.
- Toqueu les sondes de prova als punts del circuit on el volumtage s'ha de mesurar.
- Llegeix el voltage value on the display. The meter supports True RMS for AC measurements.
5.3 Mesura de corrent (CA/CC)
Precaució: 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.
- Obriu el circuit on es vol mesurar el corrent i connecteu el mesurador en sèrie.
- Llegiu el valor actual a la pantalla.
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.
- Llegiu la mesura a la pantalla.
5.5 Mesura de freqüència i cicle de treball
- Connect the black lead to COM and the red lead to the VΩHz jack.
- Rotate the function switch to the Hz/% position.
- Connecteu les sondes a la font del senyal.
- Read the frequency (Hz) or duty cycle (%) on the display.
5.6 Mesura de la temperatura
The OW18B includes a K-type thermocouple for temperature measurements.
- Ensure the multimeter is off.
- Connect the K-type thermocouple to the VΩHz and COM jacks, observing polarity.
- Rotate the function switch to the °C/°F position.
- Col·loqueu la punta del termopar sobre o a prop de l'objecte la temperatura del qual es vol mesurar.
- Read the temperature on the display. Use the "Select" button to switch between Celsius and Fahrenheit.
5.7 Vol. sense contactetage (NCV) Detecció
La funció NCV permet la detecció del volum de CAtagi sense contacte directe.
- 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 Funció de llanterna
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.
- Registre de dades: 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.
- Transmissió de veu: Enable this feature in the app settings to hear readings audibly, which can be useful in situations where viewing the display is difficult.
6. Manteniment
6.1 Neteja
Netegeu la carcassa del comptador amb anuncisamp 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 Substitució de la bateria
Refer to Section 4.1 for battery installation instructions. Replace the 9V battery when the low battery indicator appears on the display.
6.3 Canvi de fusibles
If the current measurement function fails, the fuse may need replacement.
- Assegureu-vos que el multímetre estigui apagat i que tots els cables de prova estiguin desconnectats.
- 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.
- Substituïu la tapa del compartiment de la bateria i fixeu-la.
6.4 Emmagatzematge
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. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El mesurador no s'encén. | Bateria morta o instal·lada incorrectament. | Check battery polarity and replace with a new 9V battery if necessary. |
| No hi ha lectura ni es mostra "OL" (sobrecàrrega). | Incorrect function selected, open circuit, or measurement exceeds range. | Verify function switch position, check circuit continuity, or select a higher range if available. |
| La mesura de corrent no funciona. | Fusible cremat. | Replace the appropriate fuse as described in Section 6.3. |
| Problemes de connexió Bluetooth. | 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. |
| Registre de dades 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. Especificacions
| Característica | Detall |
|---|---|
| Model | OW18B |
| Mostra | 3-5/6 bit resolution, 6000 counts |
| RMS veritable | Admet |
| Vol. Sense contactetage (NCV) | Admet |
| Bluetooth | BT 4.0 wireless transmission |
| Registre de dades | Built-in offline record (up to 7 days), app-based logging |
| Transmissió de veu | Admet |
| Llanterna | Integrat |
| Prova de temperatura | K-type thermocouple included |
| Font d'alimentació | Pila de 9V (no inclosa) |
| Dimensions (L x A x A) | 19.60 x 8.85 x 5.60 cm / 7.72 x 3.48 x 2.2 polzades |
| Pes del producte | 0.30 kg / 0.66 lbs (approx.) |
| Fabricant | LILLIPUT (Brand: OWON) |
| Classificació de seguretat | 1000V CAT III, 600V CAT IV |
9. Garantia i Suport
Per obtenir informació sobre la garantia, assistència tècnica o consultes de servei, poseu-vos en contacte amb el fabricant o el vostre distribuïdor autoritzat. Conserveu el rebut de compra com a comprovant de compra.
For the latest software updates and additional resources, please visit the official OWON weblloc.





