ALIENTEK DM40C Digital Multimeter, Oscilloscope, and Signal Generator User Manual

1. Ifihan

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. Alaye Aabo

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

• Aabo gbogbogbo: Ensure the device is in good working condition before use. Do not operate if damaged.
• Voltage Iwọn: 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.
• Wiwọn lọwọlọwọ: Ensure the circuit is de-energized before connecting the device for current measurements.
• Fiusi: The unit is fused. If a fuse blows, replace it with one of the specified type and rating.
• Awọn itọsọna Idanwo: 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. Ọja Ipariview

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.

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

Nọmba 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.

Awọn ẹya pataki:

• Multimeter: 4.5-digit (59999 count) with high precision and 5ppm reference source.
• Oscilloscope: 10-bit ADC, 50MHz sampling rate, 10MHz bandwidth, 64kpts memory.
• Olupilẹṣẹ ifihan agbara: Generates various waveforms (Sine, Sawtooth, Triangular, Square).
• Ifihan: 3.5-inch IPS touchscreen (480x320 resolution).
• Agbara: Rechargeable battery providing over 10 hours of operation.

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

4. Eto

4.1. Ngba agbara si Batiri naa

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. Nsopọ Awọn itọsọna Igbeyewo

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. Ibẹrẹ Agbara-On

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. Awọn ilana Iṣiṣẹ

5.1. Gbogbogbo isẹ

• Titan/Apapa: Tẹ mọlẹ bọtini agbara.
• Lilọ kiri akojọ aṣayan: Use the touchscreen to navigate through menus and select functions.
• Idaduro data: Freeze the current reading on the display.
• Relative Measurement (RLE): Measure the difference between a stored reference value and the current reading.
• Gbigba data: Record measurement data over time.
• Trend Graph: Visualize measurement data trends graphically.

5.2. Multimeter Ipo

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

Nọmba 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.

• Iwọn Aifọwọyi: 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).
• VoltagÌwọ̀n e (AC/DC): Connect leads to COM and VΩHz°C. Select AC or DC voltage mode. Remember to use AUTO+ fun ga voltage measurements (refer to Safety Information).
• Ìwọ̀n Lọ́wọ́lọ́wọ́ (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.
• Iwọn Atako: Connect leads to COM and VΩHz°C.
• Iwọn Agbara: Connect leads to COM and VΩHz°C.
• Idanwo Diode: Connect leads to COM and VΩHz°C. The device provides a 4-stage voltage drop measurement with distinct audible indicators.


Nọmba 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.

• Idanwo Ilọsiwaju: Connect leads to COM and VΩHz°C. An ultra-fast test with an audible indicator.
• Wiwọn Igbohunsafẹfẹ: Connect leads to COM and VΩHz°C.
• Iwọn iwọn otutu: 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.


Nọmba 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. Ipo Oscilloscope

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

• Eto ipilẹ: Select oscilloscope mode from the main menu. Adjust vertical scale (V/div) and horizontal time base (s/div) as needed.
• Nfa: Set trigger level and type (edge, pulse, etc.) to stabilize waveforms.
• Awọn iwọn: The oscilloscope can display various waveform parameters such as peak-to-peak voltage, ìgbagbogbo, àti ìyípo iṣẹ́.

5.4. Ipo monomono ifihan agbara

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).

• Aṣayan Waveform: Choose from Sine wave, Sawtooth wave, Triangular wave, or Square wave.
• Atunse Igbohunsafẹfẹ: Set the desired output frequency (1Hz to 50KHz for most waveforms, up to 10MHz for square wave).
• AmpÀtúnṣe litude: Adjust the peak-to-peak voltage (0.5Vpp to 3.0Vpp).
• Àyíká Iṣẹ́: Adjustable for Square wave (0-100%).

6. Itọju

6.1. Ninu

Nu ẹrọ naa nigbagbogbo pẹlu asọ, damp Aṣọ. Má ṣe lo àwọn ohun ìfọṣọ tàbí àwọn ohun èlò ìfọṣọ. Rí i dájú pé ẹ̀rọ náà ti pa àti pé ó ti ge asopọ̀ kúrò láti orísun agbára èyíkéyìí kí o tó sọ ọ́ di mímọ́.

6.2. Itọju batiri

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.

Nọmba 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. Awọn imudojuiwọn famuwia

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. Laasigbotitusita

• Ẹrọ ko ni agbara lori: Ensure the battery is charged. Connect the USB-C cable and attempt to power on while charging.
• Awọn kika ti ko pe: Ṣàyẹ̀wò àwọn ìsopọ̀ ìtọ́wò ìdánwò. Rí i dájú pé a yan ipò ìwọ̀n tó tọ́. Rí i dájú pé ìwọ̀n bátìrì náà wà.
• No oscilloscope waveform: Check probe connection to CHA/CHB. Adjust vertical scale and time base. Verify trigger settings.
• Sparking during voltage wiwọn: 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 kii ṣe connected to CHA/CHB. Alligator clips are for the OUT channel only. Refer to Safety Information.
• Awọn iṣoro Asopọmọra 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. Awọn pato

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

Nọmba 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, lọwọlọwọ, resistance, capacitance, igbohunsafẹfẹ, ati otutu.

9. Atilẹyin ọja ati Support

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.