1. Introdución
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. Información de seguridade
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.
- Teña extrema precaución ao traballar co voltagpor riba de 30 V CA RMS, 42 V pico ou 60 V CC. Estes voltagsupoñen un perigo de descarga.
- Before measuring current, ensure the circuit is de-energized and the meter is connected in series with the load.
- Substitúa a batería inmediatamente cando apareza o indicador de batería baixa para garantir lecturas precisas.
- Non poña en funcionamento o medidor se parece estar danado ou se a caixa está aberta.
- Use only specified replacement parts when servicing the meter.
- Manteña os dedos detrás das barreiras da sonda durante as medicións.
3. Produto rematadoview
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 lecturas de medición, unidades e indicadores de función.
- Función Interruptor rotatorio: Selects measurement modes (Voltage, corrente, resistencia, etc.).
- Tomas de entrada: Terminals for connecting test leads (VΩHz, mA, 20A, COM).
- Botóns: For range selection, data hold, backlight, flashlight, and NCV activation.
- Soporte: Permite o funcionamento mans libres.

Figure 2: OWON OW18B with integrated kickstand for convenient viewing.
4. Configuración
4.1 Instalación da batería
The OW18B requires a 9V battery for operation.
- Asegúrate de que o multímetro estea apagado.
- Localiza a tapa do compartimento da batería na parte traseira do dispositivo.
- Desaparafuse o(s) parafuso(s) de suxeición e retire a tapa.
- Conecte unha pila nova de 9 V aos conectores da pila, respectando a polaridade correcta.
- Coloque a batería no compartimento e volva colocar a tapa, asegurándoa co(s) parafuso(s).
4.2 Conexión do cable de proba
Conecte os cables de proba ás tomas de entrada axeitadas segundo a medición desexada:
- Conector COM: Always connect the black test lead to the COM (Common) jack.
- Conector VΩHz: Connect the red test lead for Voltage, Medicións de resistencia, frecuencia, capacitancia, díodo e continuidade.
- Conector mA: Connect the red test lead for current measurements up to 600mA.
- Conector de 20 A: Connect the red test lead for current measurements up to 20A.
4.3 Conexión da aplicación Bluetooth
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.
- Unha vez conectado, podes view real-time measurements, log data, and analyze trends within the application.
5. Instrucións de funcionamento
5.1 Acendido/apagado e selección de funcións
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 voltagMedición (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) ou V- (Vol. CCtage) posición.
- Toque as sondas de proba nos puntos do circuíto onde o volumetage hai que medir.
- Le o voltage value on the display. The meter supports True RMS for AC measurements.
5.3 Medición de corrente (CA/CC)
Atención: Nunca conecte o medidor en paralelo a un 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.
- Open the circuit where current is to be measured and connect the meter in series.
- Lea o valor actual na 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.
- Le a medición na pantalla.
5.5 Medición de frecuencia e ciclo de traballo
- Connect the black lead to COM and the red lead to the VΩHz jack.
- Rotate the function switch to the Hz/% position.
- Conecte as sondas á fonte de sinal.
- Read the frequency (Hz) or duty cycle (%) on the display.
5.6 Medición da 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.
- Coloque a punta do termopar sobre ou preto do obxecto cuxa temperatura se vai medir.
- Read the temperature on the display. Use the "Select" button to switch between Celsius and Fahrenheit.
5.7 Vol. sen contactotagDetección e (NCV).
A función NCV permite a detección do volume de CAtage sen contacto directo.
- 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 Función da lanterna
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.
- Rexistro de datos: 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.
- Transmisión de voz: Enable this feature in the app settings to hear readings audibly, which can be useful in situations where viewing the display is difficult.
6. Mantemento
6.1 Limpeza
Limpar a carcasa do medidor con publicidadeamp 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 Substitución da batería
Refer to Section 4.1 for battery installation instructions. Replace the 9V battery when the low battery indicator appears on the display.
6.3 Substitución de fusibles
If the current measurement function fails, the fuse may need replacement.
- Asegúrese de que o multímetro estea apagado e de que todos os cables de proba estean desconectados.
- Abra a tapa do compartimento da batería como se describe na Sección 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.
- Coloque a tapa do compartimento da batería e fíxaa.
6.4 Almacenamento
Cando non o use durante períodos prolongados, retire a batería para evitar fugas. Garde o multímetro nun lugar fresco e seco, lonxe da luz solar directa e de temperaturas extremas.
7 Solución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| O medidor non se acende. | Batería descargada ou instalada incorrectamente. | Check battery polarity and replace with a new 9V battery if necessary. |
| Non se leu nada nin se amosa "OL" (sobrecarga). | Incorrect function selected, open circuit, or measurement exceeds range. | Verify function switch position, check circuit continuity, or select a higher range if available. |
| A medición de corrente non funciona. | Fusible fundido. | Replace the appropriate fuse as described in Section 6.3. |
| Problemas de conexión 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. |
| Rexistro de datos 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. Especificacións
| Característica | Detalle |
|---|---|
| Modelo | OW18B |
| Mostrar | 3-5/6 bit resolution, 6000 counts |
| RMS verdadeiro | Soportado |
| Vol. Sen contactotage (NCV) | Soportado |
| Bluetooth | BT 4.0 wireless transmission |
| Rexistro de datos | Built-in offline record (up to 7 days), app-based logging |
| Transmisión de voz | Soportado |
| Lanterna | Integrado |
| Proba de temperatura | K-type thermocouple included |
| Fonte de enerxía | Pila de 9 V (non incluída) |
| Dimensións (L x W x H) | 19.60 x 8.85 x 5.60 cm / 7.72 x 3.48 x 2.2 polgadas |
| Peso do produto | 0.30 kg / 0.66 lbs (approx.) |
| Fabricante | LILLIPUT (Brand: OWON) |
| Valoración de seguridade | 1000 V CAT III, 600 V CAT IV |
9. Garantía e soporte
Para obter información sobre a garantía, asistencia técnica ou consultas sobre o servizo, póñase en contacto co fabricante ou co seu distribuidor autorizado. Garde o recibo de compra como proba de compra.
For the latest software updates and additional resources, please visit the official OWON websitio.





