1. Introduction
The ANENG GN702 is a compact and intelligent digital LCR tweezer bridge designed for precise testing of electronic components. It features an OLED display for clear readings and is powered by a long-lasting lithium polymer battery. This smart tweezer automatically identifies resistors, capacitors, and inductors, offering a wide measurement range and high accuracy. Its portable design and flexible, detachable gold-plated measuring tips make it ideal for various SMD and other LCR parameter measurements in electronic maintenance, circuit board repair, and DIY projects.
2. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1 x Packing Box
- 1 x User Manual (this document)
- 1 x Storage Bag
- 1 x Tweezers Bridge (Main Unit)
- 1 x Charging Cable (Type-C)
3. Product Overview
Familiarize yourself with the components and controls of your ANENG GN702 Smart Tweezer:
- Type-C interface: For charging the device.
- Charging indicator: Shows charging status (red for charging, blue for full).
- OLED display: High-contrast screen for displaying measurement results and settings.
- Button 1 (Top): Short press to turn on, long press to turn off. In measurement interface, short press to switch function/settings interface. Short press function to exit.
- Button 2 (Middle): In measurement interface, short press to switch frequency. In settings interface, long press to enter/exit, short press to move down menu.
- Button 3 (Bottom): In measurement interface, short press HOLD to retain data. Long press to switch to measure voltage. In settings interface, short press to move up menu.
- Forceps head: The tip of the tweezers for contacting components.
- Measuring arm: The main body of the tweezers that holds the forceps head.
4. Specifications
The following table details the technical specifications and measurement ranges of the ANENG GN702:
| Function | Range | 100Hz Accuracy | 1KHz Accuracy | 10KHz Accuracy | Measuring Range |
|---|---|---|---|---|---|
| R Resistance | 1MΩ - 10MΩ | 5%±5 | 5%±5 | --- | Automatic transmission: 10mΩ~10MΩ Resistance gear: 10mΩ~10MΩ |
| 1KΩ - 1MΩ | 1%±5 | 0.5%±5 | 1%±5 | ||
| 1Ω - 1KΩ | 1%±5 | 0.5%±5 | 0.5%±5 | ||
| 10mΩ - 1Ω | 3%±5 | 3%±5 | 3%±5 | ||
| C Capacitor | 1mF - 20mF | 5%±5 | 5%±5 | --- | Automatic transmission: 50PF~5mF Capacitor file: 1PF~20mF |
| 1uF - 1mF | 2%±5 | 2%±5 | 2%±5 | ||
| 1nF - 1uF | 2%±5 | 0.5%±5 | 0.5%±5 | ||
| 1pF - 1nF | --- | 5%±5 | 5%±5 | ||
| L Inductance | 1H - 60H | 5%±5 | 5%±5 | --- | Automatic transmission: 5uH~60H Inductance file: 1uH~60H |
| 1mH - 1H | 2%±5 | 2%±5 | 2%±5 | ||
| 10uH - 1mH | 2%±5 | 0.5%±5 | 0.5%±5 | ||
| 1uH - 10uH | --- | 5%±5 | 5%±5 | ||
| Frequency | 100Hz, 1KHz, 10KHz | Diode | Yes | ||
| Voltage | 0.3V, 0.6V | On/off gear | Yes | ||
| Weight | 36g | Data retention | Yes | ||
| Calibration settings | 0Ω~10MΩ, OPEN | Automatic range | Yes | ||
| Language selection | Chinese, English | Low power prompt | Yes | ||
| Screen orientation | Left, right. | Battery type | Lithium battery 3.7V | ||
| Volume settings | 0%~100% | Automatic shutdown | Closed, 5 minutes to 120 minutes | ||
| Backlight brightness | 10%~100% | Screen display | OLED display | ||
Note: The parameters are for reference only, and the actual measurement of the specific equipment shall prevail.
5. Setup
5.1 Charging the Device
The ANENG GN702 is powered by a built-in lithium polymer battery. Before first use or when the low power prompt appears, charge the device using the provided Type-C charging cable.
- Connect the Type-C end of the charging cable to the Type-C interface (1) on the device.
- Connect the USB-A end of the charging cable to a standard USB power adapter (not included).
- The charging indicator (2) will show a red light while charging.
- Once fully charged, the indicator light will turn blue.
5.2 Assembling the Forceps Head
The gold-plated tweezers head is detachable for flexible use in various application scenarios. Ensure it is securely attached before use.
6. Operating Instructions
6.1 Power On/Off
- To Power On: Short press Button 1.
- To Power Off: Long press Button 1.
6.2 Automatic Identification Mode
The ANENG GN702 features intelligent automatic identification. Simply turn on the device and touch the component with the forceps head. The device will automatically detect the component type (resistor, capacitor, inductor, or diode) and display its value.
6.3 Manual Mode and Settings
You can manually switch between different measurement gears and ranges, and access various settings:
- Switching Functions/Settings: Short press Button 1 in the measurement interface.
- Switching Frequency: Short press Button 2 in the measurement interface.
- Entering/Exiting Settings: Long press Button 2.
- Navigating Menu: Short press Button 3 to move up, short press Button 2 to move down.
- Data Hold: Short press Button 3 in measurement mode to hold the displayed value.
- Measure Voltage: Long press Button 3 to switch to voltage measurement mode.
6.4 Specific Measurement Types
The ANENG GN702 can measure various electronic components:
- Resistance (Ω): Automatically identified. Contact the two ends of the resistor with the tweezers.
- Capacitance (C): Automatically identified. Contact both ends of the capacitor. Remember to discharge capacitors before testing.
- Inductance (L): Automatically identified. Contact both sides of the inductor.
- Diode: Press Button 1 to manually switch to the diode gear. Align the diode with the positive and negative electrodes for testing. The device can only measure between 0.1V and 0.6V.
- Continuity (Buzzer): Press Button 1 to switch to the buzzer gear. Test on and off. A beep indicates continuity.
6.5 Video Demonstration
Watch this video for a visual guide on how to use the ANENG GN702 for various measurements:
7. User Tips
- Capacitor Discharge: Always remember to discharge capacitors before testing to prevent damage to the device or inaccurate readings.
- Capacitor Health Check: For capacitors, pay attention to the D-value (Dissipation Factor). A normal capacitance D-value is typically less than 1. If it is greater than 1, the capacitor may be faulty or broken.
- Transformer Quality: When measuring inductors, especially transformers, a Q-value (Quality Factor) less than 1 often indicates a defective transformer.
- SMD Component Handling: The fine tips of the tweezers are excellent for handling and testing small Surface Mount Devices (SMD) components directly on circuit boards.
- Electrical Knowledge: This is a technical product. A certain degree of electrical knowledge is recommended for optimal use and interpretation of results.
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the device in its provided storage bag in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge it regularly, even if not in use for extended periods.
- Tip Care: The gold-plated tips are delicate. Handle them with care and ensure they are clean for accurate measurements.
9. Troubleshooting
- Device Not Turning On: Ensure the battery is charged. Connect the charging cable and check if the charging indicator lights up.
- Inaccurate Readings:
- Check if the component is properly contacted by the tweezers.
- Ensure the tips are clean and free from debris.
- Verify that the correct measurement mode or frequency is selected if not using auto-identification.
- Perform calibration if necessary (refer to settings menu).
- No Display/Flickering Display: The OLED display might be affected by extreme temperatures. Ensure the device is used within its operating temperature range. If the issue persists, contact support.
- Device Not Responding: Try turning the device off and on again. If unresponsive, allow the battery to fully discharge and then recharge.
If you encounter persistent operational problems or do not understand how to use the product, please contact ANENG customer service for assistance.
10. Warranty and Support
ANENG is committed to providing high-quality products. For any quality issues or operational problems not covered in this manual, please contact ANENG customer service. They will provide you with satisfactory solutions in a timely manner.
You can also refer to the official user manual (PDF) for more detailed information: View User Manual (PDF)
11. Frequently Asked Questions (FAQ)
- Q: Can this equipment measure the ESR of electric capacitors?
- A: Yes, this LCR Smart Tweezer can measure capacitance and its associated parameters (like D-value), which can help in assessing the Equivalent Series Resistance (ESR) of capacitors. A D-value greater than 1 often indicates a faulty capacitor.
