Introduktion og overview
The OWON HDS1021M is a versatile handheld electrical test device designed for both professional and educational applications. It integrates the functionalities of a 20 MHz, single-channel digital oscilloscope with a comprehensive digital multimeter. This combination allows for detailed waveform analysis and precise electrical measurements, making it an essential tool for electronics design, assembly, repair, and electrical engineering.
The oscilloscope function provides a maximum real-time sample rate of 100MS/s and a record length of 6,000 points, enabling the capture and analysis of intricate electrical signals. It supports 18 automatic measurements for in-depth waveform analysis. The integrated multimeter offers manual and auto-ranging capabilities for measuring AC/DC voltage up to 400V, AC/DC current up to 20A, resistance up to 40 MΩ, and capacitance up to 100 µF. It also features a delta relative function, data-hold, continuity buzzer, and diode check.
Equipped with a 3.5-inch color TFT LCD (320 x 240 pixels), the HDS1021M ensures clear display of waveforms and measurement data. Its compact and portable design, powered by a rechargeable lithium-ion battery or AC adapter, makes it ideal for field use. The device includes a USB port for PC connectivity and comes with Microsoft Windows compatible software for data transmission and remote operation. It adheres to EN 61010-1:2001 safety standards and is rated for CAT II installations up to 400V.
Hvad er der i æsken?
Upon unpacking your OWON HDS1021M, please verify that all the following components are present:
- OWON HDS1021M digital oscilloscope and multimeter unit
- Oscilloscope voltage sonde
- Sæt med testledninger (røde og sorte)
- Extension module for large current measurement
- Extension module for small capacitance measurement
- Output terminal for testing of 1 kHz/5V square-wave signal
- Probe adjustment tools
- USB interface kabel
- CD-ROM PC software
- Genopladeligt lithium-ion batteri
- Battery charger/AC adapter (100 to 240V, 50/60Hz)
- Instruktioner (denne manual)

Image: The OWON HDS1021M unit displayed alongside its complete set of accessories, including probes, test leads, modules, cables, and power adapter.
Opsætning
- Batteriinstallation og opladning:
Locate the battery compartment on the back of the unit. Insert the provided rechargeable lithium-ion battery, ensuring correct polarity. Connect the battery charger/AC adapter to the unit's power input and then to a standard electrical outlet (100-240V, 50/60Hz). Allow the unit to charge fully before first use. The charging indicator will provide status.
- Første gang tændt:
Press and hold the power button until the display illuminates. The unit will perform a self-test and then display the main interface, typically defaulting to oscilloscope or multimeter mode.
- Probe and Test Lead Connection:
For oscilloscope measurements, connect the oscilloscope voltage probe to the BNC input connector. Ensure a secure connection. For multimeter functions, connect the red and black test leads to the appropriate input jacks (V/Ω/C, mA/A, COM) based on the measurement type. Refer to the markings on the unit for correct lead placement.
- PC Software Installation (Optional):
Insert the provided CD-ROM into your computer's drive. Follow the on-screen instructions to install the Microsoft Windows compatible PC software. This software enables data transmission and remote operation of the HDS1021M. Connect the unit to your PC using the supplied USB interface cable.

Image: The OWON HDS1021M unit securely placed within its protective carrying case, highlighting its portability.
Betjeningsvejledning
Oscilloskoptilstand
The oscilloscope function allows you to visualize electrical signals as waveforms. Use the dedicated buttons and rotary encoder to navigate menus and adjust settings.
- Valg af tilstand: Press the "OSC" button to enter oscilloscope mode.
- Vertikal skala (volt/divider): Adjust the vertical scale to fit the signal amplitude on the screen.
- Horisontal skala (tid/division): Adjust the horizontal scale to view the signal's time characteristics.
- Udløser: Set the trigger level and type (edge, video, pulse, slope, alternate) to stabilize the waveform display. The "AUTOSET" button can automatically adjust settings for a stable display.
- Mål: Access automatic measurement functions (e.g., Period, Frequency, Peak-to-Peak, RMS) to quantify waveform parameters.
- Bølgeformlagring: Save up to four waveforms in the internal memory for later recall and analysis.
Multimeter tilstand
The multimeter function enables precise measurement of various electrical properties. Ensure test leads are connected to the correct input jacks for the desired measurement.
- Valg af tilstand: Press the "MULTIMETER" button to switch to multimeter mode.
- Funktionsvalg: Use the function buttons (e.g., V~, V-, A~, A-, Ω, F) to select the desired measurement type (AC Voltage, DC Voltage, AC Current, DC Current, Resistance, Capacitance).
- Rækkevidde: Choose between manual ranging (select range yourself) or auto-ranging (unit automatically selects optimal range).
- Delta Relative Function: Set a reference value and display subsequent measurements as deviations from that reference.
- Data Hold: Freeze the current reading on the display for easier documentation.
- Kontinuitets- og diodekontrol: Use these functions to test circuit continuity and diode functionality.
Opretholdelse
Proper maintenance ensures the longevity and accuracy of your OWON HDS1021M.
- Rensning: Use a soft, dry cloth to clean the unit's exterior. For stubborn dirt, a slightly damp cloth with mild detergent can be used, but ensure no liquid enters the device. Do not use abrasive cleaners or solvents.
- Opbevaring: When not in use, store the unit in its protective carrying case in a cool, dry environment, away from direct sunlight and extreme temperatures.
- Batteripleje: If storing for extended periods, fully charge the lithium-ion battery before storage and recharge it every few months to maintain battery health.
- Probe and Lead Inspection: Regularly inspect probes and test leads for any signs of damage, such as frayed wires, cracked insulation, or bent connectors. Replace damaged accessories immediately to ensure safety and accurate measurements.
- Softwareopdateringer: Periodically check the OWON official website for any available firmware or PC software updates to ensure optimal performance and access to new features.
Fejlfinding
This section provides solutions to common issues you might encounter with your HDS1021M.
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Enheden tænder ikke. | Batteriet er fladt eller ikke installeret korrekt. Netadapteren er ikke tilsluttet eller defekt. | Ensure battery is fully charged and correctly inserted. Connect the AC adapter and verify power supply. |
| Ingen bølgeform vises i oscilloskoptilstand. | Probe not connected, signal too small/large, incorrect trigger settings, or incorrect vertical/horizontal scale. | Check probe connection. Adjust Volts/Div and Time/Div settings. Use "AUTOSET" function. Verify trigger level and type. |
| Multimeter readings are inaccurate or unstable. | Test leads are faulty, incorrect function selected, or measurement range is unsuitable. | Inspect test leads for damage. Ensure correct function (V, A, Ω, F) is selected. Try auto-ranging or manually select an appropriate range. |
| PC software does not recognize the device. | USB cable issue, driver not installed correctly, or software compatibility problem. | Ensure USB cable is securely connected. Reinstall PC software and drivers. Check OWON website for updated drivers or software. |
Specifikationer
Detailed technical specifications for the OWON HDS1021M:
| Feature | Specifikation |
|---|---|
| Vise | 3.5" color TFT-LCD (320 x 240 pixels) |
| Båndbredde | 20 MHz |
| Kanaler | Enkelt |
| Maksimal realtids-Sample Sats | 100 MS/s |
| Rekordlængde | 6,000 point |
| Maximum AC and DC Voltage Målt | 400V |
| Maximum AC and DC Current Measured | 20 amp |
| Maksimal modstand målt | 40 MΩ |
| Maksimal målt kapacitans | 100 µF |
| Strømkilde | Rechargeable lithium ion battery or AC adapter (100 to 240V, 50/60Hz) |
| Dimensioner (H x B x D) | 180 x 115 x 40 mm (7.09 x 4.53 x 1.57 tommer) |
| Vægt | 455 g (1.00 lbs) |
| Sikkerhedsstandard | EN 61010-1:2001, CAT II 400V |
Support and Manufacturer Information
For further assistance, technical support, or warranty inquiries, please contact the manufacturer:
- Fabrikant: Fujian Lilliput Optoelectronics Technology (operates under the OWON brand)
- Virksomhedsoplysninger: Founded in 1993 in China, with a U.S. office in City of Industry, CA. The company meets International Organization for Standardization (ISO) standard 9001.
- Officiel brugermanual (PDF): For the most comprehensive and detailed instructions, please refer to the official PDF user manual available her.
- Online ressourcer: Visit the official OWON website for product updates, drivers, and additional support resources.
Note: Specific warranty terms and contact details may vary by region. Please refer to the documentation included with your product or the manufacturer's official webwebsted for de nyeste oplysninger.





