1. Einleitung
The AUTOOL DM103 is an intelligent LCR meter designed for precise measurement of surface-mount device (SMD) components. This compact tweezer-style tester automatically recognizes L/C/R, providing accurate readings for resistance, inductance, capacitance, diodes, and continuity. Featuring an HD OLED color screen, rechargeable lithium battery, and gold-plated contacts, the DM103 is an essential tool for electronics enthusiasts and professionals working with small components.

Abbildung 1: AUTOOL DM103 LCR Meter. This image displays the overall design of the digital LCR tweezer with its integrated OLED screen.
2. Sicherheitshinweise
Please read and understand all safety instructions before using the AUTOOL DM103 LCR Meter. Failure to follow these instructions may result in electric shock, fire, or personal injury.
- Always ensure the component under test is powered off and fully discharged before measurement to prevent damage to the device or the component.
- Do not use the device in wet environments or near flammable gases.
- Versuchen Sie nicht, das Volumen zu messentages with this device, as it is designed for component testing only.
- Bewahren Sie das Gerät außerhalb der Reichweite von Kindern auf.
- Verwenden Sie zum Aufladen ausschließlich das mitgelieferte USB-C-Kabel.
- If the device shows signs of damage, do not use it.
3. Produktüberschreitungview und Funktionen
The AUTOOL DM103 incorporates several features to enhance its functionality and user experience:
- Smart Component Recognition: Automatically identifies inductors, capacitors, and resistors, precisely measuring values and D/Q values.
- HD OLED Color Screen: Self-illuminating display ensures clear measurement data in various lighting conditions.
- Wiederaufladbarer Lithium-Akku: Built-in 400mAh battery with Type-C charging, providing up to 12 hours of continuous operation.
- Precision Gold-Plated Contacts: Fine-tipped contacts for easy gripping and testing of tiny SMD components.
- Software Online Upgrade: Easily update firmware by connecting to a computer via a Type-C cable.

Abbildung 2: Smart Component Recognition. This image highlights the device's ability to automatically identify and measure various component types.

Abbildung 3: HD OLED Color Screen. A detailed view of the vibrant and clear display showing measurement results.

Abbildung 4: Rechargeable Lithium Battery. The device is shown connected to a USB-C cable for charging its internal 400mAh battery.

Abbildung 5: Precision Gold-Plated Contacts. A close-up view of the fine-tipped, gold-plated contacts engaging with an SMD component.

Abbildung 6: Software Online Upgrade. The device is connected to a computer, illustrating the process for software updates.
4. Einrichtung
4.1 Erstaufladung
Before first use, fully charge the AUTOOL DM103. Connect the provided USB-C cable to the device's charging port and plug the other end into a standard USB power adapter (not included) or a computer's USB port. The charging indicator on the screen will show the charging status. A full charge typically takes a few hours.
4.2 Ein-/Ausschalten
To power on the device, press and hold the power button (usually labeled 'MODE' or a dedicated power symbol) for a few seconds until the screen illuminates. To power off, press and hold the same button until the screen turns off. The device also features an adjustable auto-power-off function (5 minutes to 120 minutes) to conserve battery life.
5. Bedienungsanleitung
The AUTOOL DM103 offers six primary test modes for various component measurements.

Abbildung 7: Six Test Modes. This diagram outlines the different measurement capabilities of the device.
5.1 Allgemeines Messverfahren
- DM103 einschalten.
- Select the desired test mode using the 'MODE' button.
- Carefully grip the component with the gold-plated tweezers. Ensure good contact with both leads of the component.
- Read the measurement results displayed on the OLED screen.
- To freeze the display, press the 'HOLD' button. Press again to release.
5.2 Testmodi
- Automatik-Modus: Automatically recognizes L/C/R and determines the condition of components. This is the default and most convenient mode for general testing.
- Inductance Mode: Measures inductance from 1µH to 60H, suitable for high-frequency, low-power to low-frequency, high-power scenarios.
- Capacitance Mode: Measures capacitance from 1pF to 20mF, suitable for all scenarios from high-frequency signals to power filtering.
- Widerstandsmodus: Measures resistance from 10mΩ to 10MΩ, providing precise measurements for various resistors.
- Diode Mode: Automatically detects diode polarity and measures forward voltage fallen.
- Continuity Mode: Automatically beeps to indicate the circuit's continuity status, enabling quick fault diagnosis.
6. Wartung
6.1 Reinigung
Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure the gold-plated contacts are clean for accurate measurements.
6.2 Speicherung
Store the DM103 in its protective carrying case when not in use. Keep it in a cool, dry place, away from direct sunlight and extreme temperatures. The recommended storage environment is Temperature -20°C to 60°C, Humidity <80%.
6.3 Batteriepflege
To prolong battery life, avoid fully discharging the battery frequently. If storing for extended periods, charge the device to approximately 50% every few months.
7. Fehlerbehebung
- Gerät lässt sich nicht einschalten: Ensure the battery is charged. Connect to a USB-C charger and try again.
- Ungenaue Messwerte:
- Ensure the component is fully discharged and powered off.
- Check for good contact between the tweezers and the component leads.
- Clean the gold-plated contacts if dirty.
- Ensure the correct test mode is selected, or use Automatic Mode.
- Der Bildschirm ist dunkel oder reagiert nicht: Adjust backlight brightness in settings. If unresponsive, try restarting the device.
8. Spezifikationen

Abbildung 8: Technical Specifications. A comprehensive table listing the operational parameters of the DM103.
| Besonderheit | Spezifikation |
|---|---|
| Widerstandsmessbereich | 10 mΩ - 10 MΩ |
| Kapazitätsmessbereich | Auto Mode: 50pF - 5mF |
| Induktivitätsmessbereich | Auto Mode: 5µH - 60H, Inductance Mode: 1µH - 60H |
| Parameter | L, C, R, D, Q, Rs |
| Frequenz | 100 Hz, 1 kHz, 10 kHz |
| Bandtage | 0.3V, 0.6V |
| Anzeige | OLED |
| Testgeschwindigkeit | 1 Mal/Sekunde |
| Sprachauswahl | Chinesisch / Englisch |
| Lautstärkeeinstellung | 0 % - 100 % |
| Helligkeit der Hintergrundbeleuchtung | 10 % - 100 % |
| Automatische Abschaltung | Off / 5min - 120min |
| Batteriekapazität | 3.7 V, 400 mAh |
| Material | ABS |
| Betriebsumgebung | Temperature <40°C, Humidity <75% |
| Speicherumgebung | Temperature -20°C - 60°C, Humidity <80% |
9. Lieferumfang
The AUTOOL DM103 LCR Meter package includes the following items:
- AUTOOL DM103 Digitale LCR-Pinzette
- Schützende Tragetasche
- USB-C-Ladekabel
- Bedienungsanleitung

Abbildung 9: Package Contents. This image displays all items included with the AUTOOL DM103 LCR Meter.
10. Garantie und Support
For warranty information and technical support, please refer to the official AUTOOL webBesuchen Sie unsere Website oder wenden Sie sich an Ihren Händler vor Ort. Bewahren Sie Ihren Kaufbeleg als Kaufnachweis für eventuelle Garantieansprüche auf.