1. Úvod
The OWON CMS101 is a versatile 3-in-1 multifunction clamp meter designed for comprehensive electrical testing. It integrates the capabilities of an AC/DC clamp meter, a data recorder, and an oscilloscope into a single, portable device. Featuring True RMS measurement, Bluetooth Low Energy (BLE) connectivity, and Non-Contact Voltage (NCV) detection, the CMS101 provides accurate and safe measurements for a wide range of applications. Its robust design and intuitive interface make it suitable for both professional and DIY electrical work.
2. Klíčové vlastnosti
- Funkce 3 v 1: Kombinuje AC/DC clamp meter, data recorder, and oscilloscope functions.
- Skutečné měření RMS: Provides accurate readings for both AC and DC currents with 20,000 counts auto-ranging.
- Možnosti osciloskopu: Capable of measuring current and voltage waveforms for detailed analysis.
- Funkce záznamníku: Umožňuje viewing, comparing, analyzing, and storing measurement data via the i-meter mobile application.
- Měření zapínacího proudu: Ensures stable and accurate test results amidst complex current fluctuations.
- Bluetooth LE Connectivity: Supports data transfer and remote monitoring for Android and iOS dual systems.
- Uživatelsky přívětivé rozhraní: Full touch-key operation for quick, one-handed switching between functions.
- 2.8-inch IPS LCD Display: Nabízí široký viewing angle for clear display of values and waveforms, with dual theme options for different lighting conditions.
- Ergonomický design: Features a 38mm narrow-edge elongated opening for suitability in confined spaces and large wire diameters, along with an ABS rubber coating for comfortable grip, anti-slip properties, and drop resistance.
- Funkce NCV: Vestavěný bezkontaktní AC Voltage sensing for safe identification of live wires.
- Dlouhotrvající výkon: Powered by an 18650 lithium battery for extended operation.
3. Nastavení
3.1. Napájení zařízení
The CMS101 is powered by an 18650 lithium battery. Ensure the battery is charged before use. The device features a USB-C charging port.

Image: OWON CMS101 Clamp Meter with USB-C charging cable connected, illustrating the charging port.

Obrázek: Podrobný view of the OWON CMS101 highlighting the 18650 lithium battery power for long-term use and the ABS rubber coating design for comfort, anti-slip, and drop resistance.
3.2. Initial Power On and Mode Selection
To turn on the device, short press the MOC button. To turn off, long press the MOC button. After turning on, you can switch between Multimeter (DMM) and Oscilloscope (OSC) modes by short pressing the DMM/OSC tlačítko.

Image: Diagram illustrating the product structure and key buttons, including NCV sensor, reading hold button, run/stop button, auto setup button, function page switch button, and power button.
4. Návod k obsluze
4.1. Obecný provoz
The CMS101 features a full touch-key operation for ease of use. The main control buttons include:
- Tlačítko napájení: Krátkým stisknutím zapnete, dlouhým stisknutím vypnete.
- DMM/OSC button: Short press to switch between Multimeter and Oscilloscope modes.
- F1-F4 buttons: Function page switch buttons, their specific functions depend on the current mode.
- Tab button: Accesses the trigger menu in oscilloscope mode.
- Arrow keys (Up/Down): Used to switch current/voltage rozsah.
- Arrow keys (Left/Right): Used to switch time base ranges.
- 'A' key: Sets parameters automatically in oscilloscope mode.
- tlačítko HOLD: Holds the current reading in multimeter mode.

Obrázek: Overview of the CMS101's button layout, showing various measurement functions like Hz, NCV, HOLD, AUTO, APO, Voltage, Current, Resistance, Diode, Continuity, MAX MIN, True RMS, Percentage, and Backlight.
4.2. Režim osciloskopu
The oscilloscope function allows for detailed waveform analysis of current and voltage.
Video: OWON CMS101 Oscilloscope Function Overview, demonstrating switching between multimeter and oscilloscope modes, adjusting trigger levels, and changing ranges.
- Switching Measurement Mode: In oscilloscope mode, press 'F1' to switch between current and voltagměřicích režimů.
- Accessing Trigger Menu: Press the 'Tab' button to access the trigger menu. From here, you can select rising edge or falling edge triggers.
- Nastavení úrovně spouštění: Use the 'F2' and 'F3' buttons to adjust the trigger level position on the waveform.
- Switching Current/Voltage Rozsah: Use the up and down arrow keys to change the current or voltage rozsah měření.
- Switching Time Base Ranges: Use the left and right arrow keys to adjust the time base ranges for the waveform display.
- Automatické nastavení: Press the 'A' key to automatically set the oscilloscope parameters for optimal display.

Obrázek: Podrobný view of the oscilloscope display, showing Voltage Range, Trigger status, Time Base Range, Waveform Frequency and RMS Value, along with maximum, minimum, peak-to-peak, and average values.
4.3. Recorder Function
The recorder function allows for data logging and analysis. Connect the CMS101 to your smartphone via Bluetooth using the i-meter app. The app enables you to view, compare, analyze, and store measurement data in CSV format for further analysis on a computer.

Image: Screenshots of the i-meter app interface, demonstrating the data chart view for visualizing trends and the file management screen for accessing and sharing recorded data.
4.4. Měření přepěťového proudu
The inrush current measurement function helps in obtaining stable and accurate test results even amidst complex current fluctuations, which is crucial for analyzing motor startup currents or other transient loads.

Image: The OWON CMS101 performing a surge current measurement on a coiled wire, demonstrating its capability to handle complex current fluctuations.
4.5. NCV (Nekontaktní svtage) Funkce
The built-in NCV detection feature allows you to identify live wires without direct contact, enhancing safety during electrical tests. Simply bring the top part of the clamp meter near the conductor to detect AC voltage.
4.6. Bluetooth Communication
The CMS101 supports Bluetooth LE for seamless communication with Android and iOS devices. This enables remote control, data transfer, and comparative analysis of multiple instruments through the dedicated mobile application.

Image: The OWON CMS101 being remotely controlled via a smartphone app, showcasing its ability for comparative analysis of multiple instruments.
4.7. Automatické vypnutí
The meter is equipped with an automatic shutdown feature to conserve battery life. If all functions are not used, the meter will automatically shut down after 10 minutes. This default setting can be adjusted or disabled via the device settings or the mobile app.
5. Údržba
- Čištění: K čištění zařízení používejte měkký, suchý hadřík. Nepoužívejte abrazivní čisticí prostředky ani rozpouštědla.
- Péče o baterie: For optimal battery life, charge the 18650 lithium battery regularly and avoid fully discharging it for extended periods. If storing the device for a long time, ensure the battery is partially charged.
- Skladování: Přístroj skladujte na chladném a suchém místě mimo dosah přímého slunečního záření a extrémních teplot.
- Inspekce: Pravidelně kontrolujte clamp jaw and input terminals for any signs of damage or wear.
6. Řešení problémů
- Zařízení se nezapne: Ensure the 18650 lithium battery is sufficiently charged. Connect the device to a power source using the USB-C cable.
- Nepřesné údaje: Check that the test leads are properly connected and that the correct measurement range is selected. Ensure the clamp Čelist je pro měření proudu zcela uzavřena kolem vodiče.
- Problémy s připojením Bluetooth: Make sure Bluetooth is enabled on both the CMS101 and your mobile device. Ensure the i-meter app is installed and updated. Try restarting both devices and re-pairing them.
- Displej není jasný: The 2.8-inch IPS LCD has dual theme display options. Adjust the theme to adapt to different light environments for better visibility.
7. Specifikace

Image: The 2.8-inch IPS LCD display of the OWON CMS101, showing its wide viewing angle and dual theme display capability for clearer readings in various lighting conditions.
| Specifikace | Rozsah | Přesnost |
|---|---|---|
| DC svtage | 200.00mV / 2.0000V / 20.000V / 200.00V / 1000.0V | ± (0.1% + 5dig) / ± (0.1% + 5dig) / ± (0.1% + 5dig) / ± (0.1% + 5dig) / ± (0.1% + 5dig) |
| AC svtage (V) | 200.00mV / 2.0000V / 20.000V / 200.00V / 1000.0V | ± (0.6% + 10dig) / ± (0.6% + 10dig) / ± (0.6% + 10dig) / ± (0.6% + 10dig) / ± (0.8% + 10dig) |
| DC proud (A) | 20.00A / 200.0A / 1000A | ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) |
| Střídavý proud (A) | 20.00A / 200.0A / 1000A | ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (2.5% + 5dig) |
| Náběhový proud (A) | 20.00A / 200.0A / 1000A | ± (10.0% + 10dig) / ± (10.0% + 10dig) / ± (8.0% + 10dig) |
| Odpor | 200.00 Ω / 2.0000 kΩ / 20.000 kΩ / 200.00 kΩ / 2.0000 MΩ / 20.000 MΩ / 100.0 MΩ | ± (0.3% + 5dig) / ± (0.3% + 5dig) / ± (0.3% + 5dig) / ± (0.3% + 5dig) / ± (0.5% + 5dig) / ± (0.5% + 5dig) / ± (3.0% + 10dig) |
| Kapacita (F) | 2.000nF / 20.00nF / 200.0nF / 2.000μF / 20.00μF / 200.0μF / 2.000mF / 20.00mF | ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) / ± (3.0% + 10dig) |
| Frekvence (Hz) | 200.00Hz / 2.0000kHz / 20.000kHz / 200.00kHz / 2.0000MHz / 20.000MHz | ± (0.1% + 3dig) / ± (0.1% + 3dig) / ± (0.1% + 3dig) / ± (0.1% + 3dig) / ± (0.1% + 3dig) / ± (0.1% + 3dig) |
| Pracovní cyklus | 0.1%-99.9% (≥ 1 Typical: Vrms=1 V, f=100Hz) / 0.1%-99.9% (≥ 1 Typical: Vrms=1 V, f=100Hz) | ± (1.2% + 3dig) / ± (2.5% + 10dig) |
| Specifikace | Hodnota |
|---|---|
| Analogová šířka pásma | 1 kHz |
| Sample režim | s. v reálném časeample |
| s. v reálném časeampsazba lingu | 5.0MSa / s |
| Kanál | 1 |
| Vstupní impedance | 10 MΩ |
| Maximální vstupní objemtage | 1000V |
| Maximálně sample aktuální | 1000A |
| Rychlost skenování | 2.5us/div~10s/div |
| Přesnost časové základny | ± (0.01% + 0.1 div) |
| Citlivost | 30 mV/div~500V/div |
| Rozsah výtlaku | ±3 mřížka |
| Hodnota měření | Max, Min, Pk-Pk, Avg, Freq, Period, RMS |
| Spouštěcí režim | Auto |
| Typ spouště | Pád říše |
| Funkce | Popis |
|---|---|
| Bluetooth komunikace | A smartphone can be used to view data měření multimetru na straně mobilního telefonu, provádět dálkové ovládání, zobrazovat grafy dat a ukládat naměřená data ve formátu CSV. |
| Automatické vypnutí | When all functions are not used, the meter will automatically shut down in about 10 minutes (the default is 10 minutes of automatic shutdown when starting, which can be canceled). |
| Režim zobrazení | DMM nebo OSC |
| Skutečné RMS | ✓ |
| Ochrana vstupu | ✓ |
| Funkce podsvícení | ✓ |
| Indikace slabé baterie | ✓ |
| Specifikace | Hodnota |
|---|---|
| Baterie | Jednosekční 18650 3.7V |
| Velikost LCD | 2.8palcový LCD |
| Rozměry (D x Š x V) | 248 mm x 94.5 mm x 37.8 mm |
| Hmotnost | 870 g |
| Provozní teplota | as the description |
| Rozsah měření indukčnosti | 200 Hz až 20 MHz |
| Rozsah měření kapacity | 20mF |
| Rozsah měření odporu | 100 ohmů |
| Měření svtage Dosah | 20mV až 1000V |
| Měření rozsahu proudu | 20A-1000A |
| Typ zobrazení | Pouze digitální |
| Potřeby pro kutily | Elektrický |
| Původ | pevninská Čína |
| Osvědčení | CE, RoHS |
Specifikace se mohou změnit bez předchozího upozornění.
8. Uživatelské tipy
- Maximize Data Logging: Utilize the Bluetooth app for continuous data logging and remote monitoring, especially for long-term measurements or when working in hazardous environments. The CSV export feature is great for detailed post-analysis.
- Quick Oscilloscope Setup: Familiarize yourself with the 'A' (Auto) key in oscilloscope mode. It can quickly set up the waveform display, saving time during initial measurements.
- Leverage Jaw Design: The 38mm narrow-edge elongated opening is designed for convenience. Ensure the conductor is centered within the jaw for the most accurate current readings, especially with larger wires.
- Bezpečnost na prvním místě s NCV: Always use the NCV function to quickly check for live voltage before making direct contact with conductors, even if you believe the circuit is de-energized.
9. Záruka a podpora
For warranty information, technical support, or service inquiries, please refer to the official OWON webnebo se obraťte na autorizovaného prodejce. Uschovejte si účtenku jako doklad o koupi pro případné reklamace.





