1. Introducción
The OWON CMS101 is a versatile 3-in-1 AC/DC clamp meter designed for comprehensive electrical measurements. It integrates the functionalities of a clamp meter, an oscilloscope, and a data recorder into a single, portable device. With 20,000 counts True RMS, it provides accurate and reliable measurements for a wide range of applications. Its Bluetooth connectivity allows for remote control, data recording, and analysis via a smartphone application.
Características principales:
- Herramienta multifuncional 3 en 1: Combines AC/DC clamp meter, oscilloscope, and recorder functions.
- Alta precisión: 20,000 counts True RMS for precise measurements.
- Simultaneous Waveform Analysis: Oscilloscope function measures current and voltage waveforms concurrently.
- Bluetooth Data Recording: Connects to smartphones (Android/iOS) via the i-meter app for recording, viewing, comparing, analyzing, and saving measurement data.
- Remote Control & Safety Alerts: Remote operation and customizable alarm thresholds for safety.
- Diseño fácil de usar: 2.8-inch IPS LCD with wide viewing angle, dual-theme display, and 38mm narrow-edge jaw for tight spaces.
- Durable y conveniente: Powered by a 18650 lithium battery for long-term use, tactile button operation, and Non-Contact VoltagDetección de velocidad de conducción nerviosa (NCV).

Figure 1: The OWON CMS101 highlighting its three core functions: AC/DC Clamp Meter, Recorder, and Oscilloscope.
2. Información de seguridad
Please read all safety information carefully before using the OWON CMS101. Failure to follow these instructions may result in electric shock, fire, or personal injury.
- Always inspect the device and test leads for damage before use. Do not use if damaged.
- Asegúrese de que el compartimento de la batería esté bien cerrado antes de utilizarlo.
- No aplicar voltage or current that exceeds the maximum rated values specified in the technical specifications.
- Tenga cuidado al trabajar con vol.tages superior a 30 V CA RMS, 42 V pico o 60 V CC. Estos volúmenestagPueden suponer un riesgo de descarga eléctrica.
- Always disconnect power to the circuit under test before making connections or breaking connections.
- No opere el dispositivo en atmósferas explosivas o en presencia de gases o polvos inflamables.
- Ensure your hands are dry and wear appropriate personal protective equipment (PPE) when performing electrical measurements.
- No intente reparar ni modificar el dispositivo. Encargue cualquier servicio técnico a personal cualificado.
- Cumplir con todos los códigos de seguridad locales y nacionales.
- Always verify readings with a known good source or secondary method, especially for safety-critical applications.
3. Producto terminadoview
The OWON CMS101 is designed for ease of use and durability. Familiarize yourself with its components and controls.

Figure 2: Product structure diagram with key components and button functions labeled.
Componentes clave:
- Clamp Mandíbula: For non-contact AC/DC current measurement. Features a 38mm narrow-edge design for accessibility.
- LCD IPS Display: 2.8-inch screen with wide viewing angle and dual-theme display for clear readability in various lighting conditions.
- Botones de función (F1-F4): Context-sensitive buttons for menu navigation and mode-specific operations.
- Botones de navegacion: Up/Down/Left/Right for menu and setting adjustments.
- Botón de encendido: Short press to power on, long press to power off. Short press after power-on to switch between Oscilloscope and Multimeter modes.
- DMM/OSC Switch: Dedicated button to toggle between Digital Multimeter and Oscilloscope modes.
- Terminales de entrada: Para conectar cables de prueba para vol.tage, resistance, continuity, diode, and other measurements.
- Sensor de velocidad de conducción nerviosa: Vol sin contactotagÁrea de detección e.
- Compartimento de la batería: Houses the 18650 lithium battery.

Figure 3: The 2.8-inch IPS LCD display, demonstrating clear value and waveform visualization with dual theme options.

Figure 4: Details of the OWON CMS101, including the 18650 lithium battery power, full silicone button membrane, and durable ABS rubber-coated design.
4. Configuración
4.1 Instalación de la batería
- Localice la tapa del compartimiento de la batería en la parte posterior del dispositivo.
- Open the cover and insert the provided 18650 lithium battery, ensuring correct polarity.
- Cierre bien la tapa del compartimento de la batería.
4.2 Encendido / Apagado
- Para encender: Presione el FUERZA Botón brevemente.
- Para apagar: Mantenga pulsado el FUERZA hasta que la pantalla se apague.
4.3 Bluetooth Connection and App Installation
- Download the "i-meter" application from your smartphone's app store (available for Android and iOS).
- Ensure Bluetooth is enabled on your smartphone and on the CMS101 device.
- Open the i-meter app and follow the on-screen instructions to pair with your CMS101 device.
- Once connected, you can remotely control the device and access data recording features.
5. Operación
5.1 Modos de conmutación (multímetro/osciloscopio)
After powering on, briefly press the FUERZA Botón para alternar entre el modo multímetro digital (DMM) y el modo osciloscopio (OSC).
5.2 Clamp Meter (AC/DC Current Measurement)
El CLamp meter function allows for non-contact measurement of AC and DC current up to 1000A.
- Ensure the device is in DMM mode.
- Presione el gatillo de liberación de la mandíbula para abrir la cerradura.amp mandíbula.
- Posiciona el clamp jaw around a single conductor (not a bundle of wires) through which the current flows. Ensure the jaw is fully closed.
- Lea el valor actual mostrado en la pantalla LCD.
- Use the function buttons (F1-F4) to select AC or DC current measurement if not auto-ranging.

Figure 5: The OWON CMS101 in use, measuring current by clamping around a conductor.
5.3 Función del osciloscopio
In Oscilloscope mode, the CMS101 can display and analyze current and voltage waveforms simultaneously.
- Switch the device to OSC mode.
- Connect the test leads to the appropriate input terminals for voltage medición, o utilice el clamp for current waveform.
- The display will show the waveform. Use the navigation buttons and function buttons (F1-F4) to adjust settings such as time base, voltage range, and trigger.
- The oscilloscope provides measurement values including maximum, minimum, peak-to-peak, and average values.

Figure 6: The device capable of measuring current and voltage waveforms for comprehensive analysis.
5.4 Recorder Function (Data Logging)
The recorder function allows you to log measurement data over time and analyze it using the i-meter smartphone app.
- Ensure the CMS101 is connected to your smartphone via Bluetooth.
- Open the i-meter app and navigate to the recording section.
- Start the recording function. The app will automatically log measured values and display trends graphically.
- Recorded data (in CSV format) can be shared and analyzed on a computer.

Figure 7: The i-meter app displaying recorded data in graphical and tabular formats, with options for file gestión.
5.5 Other Measurement Functions
The CMS101 supports various other measurement capabilities:
- Volumentagmi(V): Vol. CA y CCtagy medición.
- Resistencia (Ω): Mide la resistencia eléctrica.
- Continuidad: Audible alert for continuous circuits.
- Prueba de diodo: Comprueba la funcionalidad del diodo.
- Frecuencia (Hz): Mide la frecuencia de la señal.
- Vol sin contactotage (VNC): Detecta el volumen de CAtagy sin contacto físico.
- Retención de datos (HOLD): Congela la lectura actual en la pantalla.
- Auto Ranging (AUTO): Selecciona automáticamente el rango de medición apropiado.
- Apagado automático (APO): Conserva la vida útil de la batería al apagarse automáticamente después de un período de inactividad.
- MÁXIMO MINIMO: Registra valores máximos y mínimos durante una sesión de medición.
- Verdadero valor eficaz: Proporciona lecturas precisas para formas de onda no sinusoidales.

Figure 8: Icons representing the various measurement functions available on the OWON CMS101.
6. Mantenimiento
6.1 Limpieza
To clean the device, wipe the case with a damp Paño y detergente suave. No utilice abrasivos ni disolventes. Asegúrese de que el dispositivo esté apagado y desconectado de cualquier circuito antes de limpiarlo.
6.2 Cuidado de la batería
- Recharge the 18650 lithium battery when the low battery indicator appears.
- Si el dispositivo no se utilizará durante un período prolongado, retire la batería para evitar fugas.
- Deshazte de las baterías de acuerdo a las regulaciones locales.
6.3 Almacenamiento
Guarde el dispositivo en un lugar fresco y seco, alejado de la luz solar directa y de temperaturas extremas. Manténgalo fuera del alcance de los niños.
7. Solución de problemas
If you encounter issues with your OWON CMS101, refer to the following common problems and solutions:
| Problema | Posible causa | Solución |
|---|---|---|
| El dispositivo no se enciende. | Batería baja o agotada. Instalación incorrecta de la batería. | Charge or replace the 18650 lithium battery. Ensure battery is inserted with correct polarity. |
| Inaccurate readings (e.g., non-zero reading with no input, or 0V with mains voltagmi). | Sensor offset or calibration issue. Environmental interference. Device malfunction. | Perform a zero-adjustment if available in the menu. Ensure no strong magnetic fields are nearby. If problem persists, contact customer support for calibration or service. |
| La conexión Bluetooth falla. | Bluetooth not enabled on device/phone. App not installed or outdated. Device too far from phone. | Ensure Bluetooth is active on both devices. Reinstall or update the i-meter app. Keep devices within Bluetooth range. |
| La pantalla está oscura o ilegible. | Low battery. Backlight setting. | Charge the battery. Adjust backlight brightness via menu settings. |
| No reading when clampEn. | Clamp jaw not fully closed. Clamping around multiple conductors. Incorrect mode selected. | Ensure jaw is fully closed around a single conductor. Verify correct AC/DC current mode is selected. |
8. Especificaciones
Below are the technical specifications for the OWON CMS101:
| Característica | Detalle |
|---|---|
| Número de modelo | OWON-CMS101 |
| Dimensiones del producto | 24.8 x 9.4 x 3.8 cm |
| Peso | 820 gramos |
| Fuente de poder | 18650 Batería de litio |
| Mostrar | Pantalla LCD IPS de 2.8 pulgadas |
| Apertura de mandíbula | 38 milímetros |
| Cuenta | 20,000 counts True RMS |
| Conectividad | Bluetooth (Android/iOS app) |
| Certificaciones | CE Certified, RoHS Compliant |
| Funciones | AC / DC Clamp Meter, Oscilloscope, Data Recorder, NCV, True RMS, Max/Min, Hold, Auto Ranging, Auto Power Off, Frequency, Resistance, Continuity, Diode Test |
9. Garantía y soporte
9.1 Información de garantía
OWON products are covered by a limited warranty against defects in materials and workmanship. The specific warranty period may vary by region and product. Please retain your proof of purchase for warranty claims. For detailed warranty terms and conditions, refer to the official OWON websitio o póngase en contacto con el servicio de atención al cliente.
9.2 Atención al cliente
If you have any questions, require technical assistance, or need to report a problem with your OWON CMS101, please contact OWON customer support. You can typically find contact information on the official OWON websitio o a través de su minorista.
- Soporte en línea: Visit the official OWON webSitio para preguntas frecuentes, descargas de software y recursos de soporte.
- Soporte por correo electrónico: Refer to your product packaging or the OWON websitio para obtener la dirección de correo electrónico de soporte adecuada.
- Soporte telefónico: Contact numbers may be available on the OWON websitio para su región.
When contacting support, please have your product model (CMS101) and purchase details ready.