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

1. அறிமுகம்

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. பாதுகாப்பு தகவல்

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

• பொது பாதுகாப்பு: Ensure the device is in good working condition before use. Do not operate if damaged.
• தொகுதிtagஇ அளவீடு: For DC-DC or high voltage measurements above 36V, it is recommended to use the ஆட்டோ+ 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.
• தற்போதைய அளவீடு: Ensure the circuit is de-energized before connecting the device for current measurements.
• உருகிகள்: The unit is fused. If a fuse blows, replace it with one of the specified type and rating.
• சோதனை வழிகள்: 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. தயாரிப்பு முடிந்துவிட்டதுview

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.

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

படம் 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.

முக்கிய அம்சங்கள்:

• மல்டிமீட்டர்: 4.5-digit (59999 count) with high precision and 5ppm reference source.
• அலைக்காட்டி: 10-bit ADC, 50MHz sampling rate, 10MHz bandwidth, 64kpts memory.
• சிக்னல் ஜெனரேட்டர்: Generates various waveforms (Sine, Sawtooth, Triangular, Square).
• காட்சி: 3.5-inch IPS touchscreen (480x320 resolution).
• சக்தி: Rechargeable battery providing over 10 hours of operation.

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

4 அமைவு

4.1. பேட்டரியை சார்ஜ் செய்தல்

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. சோதனை லீட்களை இணைத்தல்

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. ஆரம்ப பவர்-ஆன்

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. இயக்க வழிமுறைகள்

5.1. பொது செயல்பாடு

• பவர் ஆன்/ஆஃப்: ஆற்றல் பொத்தானை அழுத்திப் பிடிக்கவும்.
• மெனு வழிசெலுத்தல்: Use the touchscreen to navigate through menus and select functions.
• டேட்டா ஹோல்ட்: Freeze the current reading on the display.
• Relative Measurement (RLE): Measure the difference between a stored reference value and the current reading.
• தரவு பதிவு: Record measurement data over time.
• Trend Graph: Visualize measurement data trends graphically.

5.2. மல்டிமீட்டர் பயன்முறை

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

படம் 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.

• தானியங்கி அளவீடு: 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).
• தொகுதிtage அளவீடு (AC/DC): Connect leads to COM and VΩHz°C. Select AC or DC voltage mode. Remember to use ஆட்டோ+ உயர் தொகுதிக்குtage measurements (refer to Safety Information).
• மின்னோட்ட அளவீடு (ஏசி/டிசி): 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.
• எதிர்ப்பு அளவீடு: Connect leads to COM and VΩHz°C.
• கொள்ளளவு அளவீடு: Connect leads to COM and VΩHz°C.
• டையோடு சோதனை: Connect leads to COM and VΩHz°C. The device provides a 4-stagஇ தொகுதிtage drop measurement with distinct audible indicators.


படம் 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.

• தொடர் சோதனை: Connect leads to COM and VΩHz°C. An ultra-fast test with an audible indicator.
• அதிர்வெண் அளவீடு: Connect leads to COM and VΩHz°C.
• வெப்பநிலை அளவீடு: 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.


படம் 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. அலைக்காட்டி முறை

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

• அடிப்படை அமைப்பு: Select oscilloscope mode from the main menu. Adjust vertical scale (V/div) and horizontal time base (s/div) as needed.
• தூண்டுதல்: Set trigger level and type (edge, pulse, etc.) to stabilize waveforms.
• அளவீடுகள்: 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).

• அலைவடிவத் தேர்வு: Choose from Sine wave, Sawtooth wave, Triangular wave, or Square wave.
• அதிர்வெண் சரிசெய்தல்: Set the desired output frequency (1Hz to 50KHz for most waveforms, up to 10MHz for square wave).
• Ampஅட்சரேகை சரிசெய்தல்: Adjust the peak-to-peak voltage (0.5Vpp to 3.0Vpp).
• கடமை சுழற்சி: Adjustable for Square wave (0-100%).

6. பராமரிப்பு

6.1. சுத்தம் செய்தல்

மென்மையான, டி-துணியால் சாதனத்தை தொடர்ந்து சுத்தம் செய்யவும்.amp துணி. சிராய்ப்பு கிளீனர்கள் அல்லது கரைப்பான்களைப் பயன்படுத்த வேண்டாம். சுத்தம் செய்வதற்கு முன் சாதனம் அணைக்கப்பட்டு, எந்த மின் மூலத்திலிருந்தும் துண்டிக்கப்பட்டுள்ளதா என்பதை உறுதிப்படுத்திக் கொள்ளுங்கள்.

6.2. பேட்டரி பராமரிப்பு

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.

படம் 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. நிலைபொருள் புதுப்பிப்புகள்

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. சரிசெய்தல்

• சாதனம் இயக்கப்படவில்லை: Ensure the battery is charged. Connect the USB-C cable and attempt to power on while charging.
• தவறான அளவீடுகள்: 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 voltagமின் அளவீடு: Immediately switch to ஆட்டோ+ mode for high voltage measurements (above 36V) to prevent this. Refer to Safety Information.
• Damage to oscilloscope input: Ensure alligator clips are இல்லை connected to CHA/CHB. Alligator clips are for the OUT channel only. Refer to Safety Information.
• புளூடூத் இணைப்பு சிக்கல்கள்: 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. விவரக்குறிப்புகள்

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

படம் 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, மின்னோட்டம், எதிர்ப்பு, மின்தேக்கம், அதிர்வெண் மற்றும் வெப்பநிலை.

9. உத்தரவாதம் மற்றும் ஆதரவு

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.