Manual de utilizare pentru multimetrul digital ALIENTEK DM40C, osciloscopul și generatorul de semnal

1. Introducere

Thank you for choosing the ALIENTEK DM40C. This device is a professional 4.5-digit digital multimeter, oscilloscope, and signal generator integrated into a single handheld unit. It offers high precision measurements, a 50M sample rate oscilloscope, and various waveform generation capabilities, making it suitable for a wide range of electrical testing and diagnostic applications.

This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your DM40C device. Please read it thoroughly before use.

2. Informații de siguranță

Always observe safety precautions when using electrical testing equipment to prevent personal injury or damage to the device.

• Siguranta generala: Ensure the device is in good working condition before use. Do not operate if damaged.
• Voltage Măsurare: For DC-DC or high voltage measurements above 36V, it is recommended to use the AUTO+ mode. This mode skips the millivolt (mV) range to prevent mismeasurement, sparking, and potential damage. The default AUTO mode includes the mV range, which may not be suitable for higher voltages.
• MCX Connector Usage: The MCX pin sizes for the alligator clip and oscilloscope probe differ. The alligator clip's inner pin is larger. Do not attach the alligator clip to the CHA/CHB (oscilloscope analog channels). The alligator clip is intended only for the OUT channel (waveform output) to avoid poor contact or damage to the oscilloscope's analog channels.
• Măsurare curentă: Ensure the circuit is de-energized before connecting the device for current measurements.
• Siguranțe: The unit is fused. If a fuse blows, replace it with one of the specified type and rating.
• Cablii de testare: Use only the provided or equivalent high-quality test leads. The included leads are fine-tipped, suitable for small electronics. For higher-current or heavier work, consider investing in more robust leads.

3. Produs terminatview

The ALIENTEK DM40C combines three essential tools into one compact device: a digital multimeter, an oscilloscope, and a signal generator. It features a high-resolution IPS touchscreen for clear data display and intuitive control.

Figura 3.1: The ALIENTEK DM40C unit shown with its standard accessories, including test leads, probe leads, and a USB-C cable.

Figura 3.2: This image illustrates the core capabilities of the DM40C: a high-precision multimeter, a 10-bit ADC oscilloscope with 50M sampling rate, and a signal generator.

Caracteristici cheie:

• Multimetru: 4.5-digit (59999 count) with high precision and 5ppm reference source.
• Osciloscop: 10-bit ADC, 50MHz sampling rate, 10MHz bandwidth, 64kpts memory.
• Generator de semnal: Generates various waveforms (Sine, Sawtooth, Triangular, Square).
• Afişa: Ecran tactil IPS de 3.5 inci (rezoluție 480x320).
• Putere: Rechargeable battery providing over 10 hours of operation.

Figura 3.3: The device features a 3.5-inch IPS touchscreen (480x320 resolution) for clear display and intuitive interaction.

4. Configurare

4.1. Încărcarea bateriei

The DM40C is powered by an internal rechargeable battery. Before first use, fully charge the device using the provided USB-C cable and a compatible USB power adapter (not included). The charging indicator on the device will show the charging status.

4.2. Conectarea cablurilor de testare

Connect the test leads to the appropriate input jacks on the right side of the device. The common (COM) jack is typically used for the black lead. The VΩHz°C jack is for voltage, resistance, frequency, and temperature measurements. The A mA uA jack is for current measurements. Ensure connections are secure.

4.3. Pornirea inițială

Press and hold the power button to turn on the device. The IPS touchscreen will illuminate, displaying the main interface. Follow any on-screen prompts for initial setup or calibration if presented.

5. Instrucțiuni de utilizare

5.1. Funcționare generală

• Pornire/Oprire: Apăsați și mențineți apăsat butonul de pornire.
• Navigare prin meniu: Use the touchscreen to navigate through menus and select functions.
• Păstrarea datelor: Freeze the current reading on the display.
• Relative Measurement (RLE): Measure the difference between a stored reference value and the current reading.
• Înregistrarea datelor: Record measurement data over time.
• Trend Graph: Visualize measurement data trends graphically.

5.2. Modul multimetru

The DM40C offers a comprehensive range of multimeter functions. Select the desired measurement mode from the main interface.

Figura 5.1: The automatic measurement feature simplifies operation by automatically selecting the correct range for voltage (0.01mV-1000V DC, 0.01mV-750V AC) and current (0.01uA-10A) without manual mode switching.

• Măsurare automată: The device can automatically detect and select the appropriate range for voltage (DC: 0.01mV-1000V, AC: 0.01mV-750V) and current (0.01uA-10A).
• VoltagMăsurare (AC/DC): Connect leads to COM and VΩHz°C. Select AC or DC voltage mode. Remember to use AUTO+ pentru volum maretage measurements (refer to Safety Information).
• Măsurarea curentului (AC/DC): Connect leads to COM and A mA uA. Ensure the circuit is open and the device is connected in series. The innovative 3-hole design allows fully automatic current measurement across μA/mA/A ranges.
• Măsurarea rezistenței: Connect leads to COM and VΩHz°C.
• Măsurarea capacității: Connect leads to COM and VΩHz°C.
• Test de diodă: Connect leads to COM and VΩHz°C. The device provides a 4-stage voltage drop measurement with distinct audible indicators.


Figura 5.2: This screen capture details the diode measurement function with multiple voltage drop indications and the fast continuity test feature, including resistor measurement capabilities.

• Test de continuitate: Connect leads to COM and VΩHz°C. An ultra-fast test with an audible indicator.
• Măsurarea frecvenței: Connect leads to COM and VΩHz°C.
• Măsurarea temperaturii: Requires a compatible temperature probe (not included). Connect the probe to the VΩHz°C and COM jacks.
• AC+DC Mixed Measurement: The DM40C supports simultaneous display of both AC and DC components for complex signals.


Figura 5.3: The display demonstrates the device's ability to perform True RMS measurements, simultaneously display AC and DC components, and visualize data trends over time with adjustable time bases.

5.3. Modul Osciloscop

The integrated oscilloscope provides waveform visualization and analysis. Connect the oscilloscope probe to the CHA/CHB input.

• Configurare de bază: Select oscilloscope mode from the main menu. Adjust vertical scale (V/div) and horizontal time base (s/div) as needed.
• Declanșarea: Set trigger level and type (edge, pulse, etc.) to stabilize waveforms.
• Masuri: The oscilloscope can display various waveform parameters such as peak-to-peak voltage, frequency, and duty cycle.

5.4. Signal Generator Mode

The DM40C can generate various test signals. Connect the output to the OUT channel using the alligator clip (refer to Safety Information regarding MCX connector usage).

• Selecția formei de undă: Choose from Sine wave, Sawtooth wave, Triangular wave, or Square wave.
• Ajustarea frecvenței: Set the desired output frequency (1Hz to 50KHz for most waveforms, up to 10MHz for square wave).
• AmpReglarea litudinii: Adjust the peak-to-peak voltage (0.5Vpp to 3.0Vpp).
• Ciclu de funcționare: Adjustable for Square wave (0-100%).

6. Întreținere

6.1. Curatenie

Curățați dispozitivul în mod regulat cu o lavetă moale,amp lavetă. Nu utilizați substanțe de curățare abrazive sau solvenți. Asigurați-vă că dispozitivul este oprit și deconectat de la orice sursă de alimentare înainte de curățare.

6.2. Îngrijirea bateriei

To prolong battery life, avoid fully discharging the battery frequently. If storing the device for an extended period, charge it to approximately 50% and store in a cool, dry place.

Figura 6.1: The DM40C incorporates safety isolation for multimeter communication and is powered by a rechargeable battery providing over 10 hours of operation.

6.3. Actualizări de firmware

ALIENTEK may release firmware updates to add features or fix bugs. Check the official ALIENTEK website for the latest firmware and instructions on how to update your device. Exercise caution when installing third-party applications or firmware not directly from the manufacturer.

7. Depanare

• Dispozitivul nu pornește: Ensure the battery is charged. Connect the USB-C cable and attempt to power on while charging.
• Citiri inexacte: Check test lead connections. Ensure the correct measurement mode is selected. Verify the battery level.
• No oscilloscope waveform: Check probe connection to CHA/CHB. Adjust vertical scale and time base. Verify trigger settings.
• Sparking during voltagMăsurarea: Immediately switch to AUTO+ mode for high voltage measurements (above 36V) to prevent this. Refer to Safety Information.
• Damage to oscilloscope input: Ensure alligator clips are nu connected to CHA/CHB. Alligator clips are for the OUT channel only. Refer to Safety Information.
• Probleme de conectivitate Bluetooth: Ensure your device has the latest firmware (version 2.2 or higher for Bluetooth functionality, if available for your model). Note that Bluetooth may only support multimeter functions.

8. Specificații

The following table outlines the key specifications for the ALIENTEK DM40C.

Figura 8.1: A comprehensive table outlining the technical specifications, measurement ranges, and accuracy for the DM40A, DM40B, and DM40C models across various functions including voltage, curent, rezistență, capacitate, frecvență și temperatură.

9. Garanție și asistență

ALIENTEK products are designed for reliability and performance. For warranty information, please refer to the documentation included with your purchase or visit the official ALIENTEK website. For technical support, troubleshooting assistance, or inquiries about replacement parts, please contact ALIENTEK customer service through their official channels.