1. Overview
The ANENG 621A is a smart digital multimeter designed for a wide range of electrical measurements. It features automatic selection of measurement functions and ranges, full-scale overload protection, and a clear 9999-digit LCD display. This manual provides essential information for safe and effective use of the device.
Key Features:
- Automatic measurement functions and range selection.
- Full-scale overload protection.
- Maximum voltage: 1000V DC or 750V AC.
- 9999-digit LCD display.
- Automatic polarity indication.
- Overrange display: 'OL' or '-OL'.
- Sampling rate: Approximately 3 times per second.
- Auto shutdown: 15 minutes of inactivity.
- Power supply: 3.7V/600mAh lithium battery.
- Operating temperature: 0°C - 40°C.
2. Package Contents
The ANENG 621A Smart Digital Multimeter package typically includes the following items:
- ANENG 621A Smart Digital Multimeter
- Test Leads (Red and Black)
- Temperature Line (Thermocouple)
- Data Line (USB Type-C charging cable)
- User Manual
- Color Box Packaging
Image: ANENG 621A Multimeter with its complete set of accessories.
3. Setup
3.1. Charging the Battery
The ANENG 621A is equipped with a rechargeable lithium battery. Use the provided USB Type-C data line and a compatible charger to charge the device. The display will indicate charging status.
Image: Connecting the USB Type-C cable to the multimeter for charging.
3.2. Connecting Test Leads
To perform measurements, connect the red and black test leads to the appropriate input jacks on the multimeter. Ensure a secure connection.
Image: Proper connection of test leads to the multimeter.
4. Operating Instructions
4.1. Power On/Off
- Power On: Single press the power button (usually labeled 'Boot' or indicated by a power icon) to turn on the multimeter.
- Power Off: Long press the power button for 2 seconds to turn off the multimeter.
Image: Functional panel analysis with power button location.
4.2. Automatic Measurement (Auto Range)
The ANENG 621A features an auto-ranging function that automatically identifies the type of measurement (resistance, voltage, etc.) and selects the appropriate range. Simply connect the test leads to the circuit or component, and the multimeter will display the reading.
4.3. Specific Measurement Functions
The multimeter can measure a variety of electronic components. Use the 'SEL' button to toggle between functions if needed, or rely on the auto-ranging feature.
4.3.1. Resistance Measurement
The multimeter automatically identifies resistance. Connect the test leads across the component to measure its resistance. If the resistance is below 100Ω, a buzzer alarm will sound.
Image: Measuring resistance with the multimeter.
4.3.2. Diode Test
Use the touch screen button to switch to diode test mode. Accurately distinguish positive and negative poles to measure the diode value. Good diodes will beep, bad ones will not.
Image: Performing a diode test.
4.3.3. Continuity (On-off) Detection
The multimeter can detect continuity in a circuit. If there is continuity, the device will beep.
Image: Example of fuse inspection, which is a continuity test.
4.3.4. Capacitance Measurement
Before measuring capacitance, ensure the capacitor is fully discharged to prevent damage to the multimeter. Connect the test leads across the capacitor terminals.
Image: Measuring capacitance with the multimeter.
4.3.5. DC Voltage Measurement
The multimeter automatically identifies DC voltage. Connect the test leads in parallel across the DC voltage source (e.g., a battery).
Image: Measuring DC voltage.
4.3.6. AC Voltage Measurement
The multimeter automatically identifies AC voltage. Connect the test leads in parallel across the AC voltage source (e.g., a wall socket).
Image: Measuring AC voltage.
4.3.7. Temperature Measurement
Connect the temperature probe to the multimeter and place the probe in contact with the object whose temperature you wish to measure. The screen will display the measured Celsius/Fahrenheit simultaneously.
Image: Measuring temperature using the provided probe.
4.3.8. NCV (Non-Contact Voltage) Induction
The NCV function allows for non-contact detection of AC voltage. Hold the multimeter near a live wire or outlet. A strong signal (live wire) will result in a fast beeping sound and a high red index bar on the screen. A weak signal (zero line) will result in a slow beeping sound and a low green index bar.
Image: Using NCV to detect live and zero lines.
4.3.9. AC Current Measurement
To measure AC current, connect the red test lead to the current socket (10A/10SEC MAX) and the black lead to the COM port. Connect the multimeter in series with the circuit you wish to measure. For example, to measure the current of an incandescent lamp, connect the multimeter in series with the lamp.
Image: Measuring AC current in a circuit with a light bulb.
4.3.10. DC Current Measurement
To measure DC current, connect the red test lead to the current socket (10A/10SEC MAX) and the black lead to the COM port. Connect the multimeter in series with the circuit you wish to measure. For example, to measure the current of an LED lamp strip, connect the multimeter in series with the strip.
Image: Measuring DC current in a circuit with an LED strip.
4.4. Additional Functions
- Flashlight: The multimeter includes a back flashlight for illuminating work areas in low-light conditions.
- Data Retention: The 'HOLD' function allows you to freeze the current reading on the display.
- Reverse Display: The display can be reversed for better viewing angles.
Image: Using the multimeter's flashlight in a dark environment.
5. Maintenance
- Cleaning: Keep the multimeter clean and dry. Use a soft, damp cloth for cleaning. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Silicone Sheath: The multimeter is protected by an effective shockproof silicone sheath. This helps prevent damage from accidental drops and scratches.
Image: The multimeter's protective silicone sheath.
6. Troubleshooting
6.1. Millivolt Value Jump (Non-Zero Reading)
If the multimeter displays a non-zero millivolt value when not connected to a circuit, this can be a normal phenomenon due to:
- Excessive changes in ambient temperature and humidity.
- Strong electric or magnetic field interference.
To verify if the multimeter is functioning correctly, dial the multimeter to the mV setting, insert the red and black test leads into the input holes, and then short the red and black test leads. The multimeter should display "0000". If it does, the non-return to zero in the initial state is due to environmental factors and does not affect the accuracy of measurements. However, it is recommended to eliminate environmental interference factors for optimal accuracy.
Image: Millivolt value jump explanation and troubleshooting steps.
6.2. General Troubleshooting
- No Display: Check battery charge. Ensure the device is powered on.
- Incorrect Readings: Verify test lead connections. Ensure the correct measurement function is selected (if not using auto-range). Check for environmental interference.
- Buzzer Not Working: Ensure the function requiring a buzzer is active and the conditions for the buzzer to sound are met (e.g., continuity).
7. Specifications
| Feature | Range | Resolution | Accuracy |
|---|---|---|---|
| DC Voltage | 0.5V~999.9V | 0.1mV~0.1V | ±(0.5% reading+3 digits) |
| mA DC Voltage | 0~600.0mV | 0.1mV~0.1V | ±(0.5% reading+3 digits) |
| AC Voltage | 0.5V~999.9V | 0.1mV~0.1V | ±(0.8% reading+5 digits) |
| mA AC Voltage | 0~600.0mV | 0.1mV~0.1V | ±(0.8% reading+5 digits) |
| DC Current | 20mA~10A | 1mA~0.01A | ±(1.0% reading+5 digits) |
| AC Current | 20mA~10A | 1mA~0.01A | ±(1.0% reading+8 digits) |
| Hz (AC gear) | 40Hz~1000Hz | 0.1Hz~1Hz | ±(1.0% reading+5 digits) |
| Capacitance | 9.999nF~99.99mF | 0.001nF~0.01mF | ±(2.5% reading+20 digits) |
| Resistance | 999.9Ω~99.99MΩ | 0.1Ω~0.01MΩ | ±(0.8% reading+3 digits) |
| Temperature °F | -40~1832°F | 1°F | ±(1% reading+3°F) |
| Temperature °C | -40~1000°C | 1°C | ±(1% reading+3°C) |
| Diode | On-OFF Detection | ✔ | |
| Data Retention | ✔ | ✔ | |
| Flashlight | ✔ | ✔ | |
| Reverse Display | ✔ | ||
| Smart Anti-burn | ✔ | ||
| Auto Shut-down | 10 minutes of no use | ||
| Max Display | 9999 counts | ||
| Product Material | ABS | ||
| Wire Material | PVC/Brass | ||
| Silicone Sheath | ✔ | ||
| Total Wire Length | 90cm/35.4in | ||
| Battery Type | lithium battery | ||
| Weight | 162g | ||
| Product Size | 133*66.5*22.5cm / 5.23in*2.62*0.88in |
Note: The parameters are for reference only; actual measurements may vary slightly.
Image: Functional parameters table.
Image: Product dimensions.
8. User Tips
- Always ensure the test leads are securely connected before taking any measurements.
- When measuring current, always connect the multimeter in series with the circuit. Incorrect connection can damage the device or the circuit.
- For capacitance measurements, always discharge the capacitor completely before connecting the multimeter to avoid potential damage.
- If you encounter a 'millivolt value jump' (non-zero reading in mV mode when leads are open), it's often due to environmental factors. Shorting the leads to confirm a '0000' reading can help verify the multimeter's functionality.
9. Warranty and Support
ANENG provides professional after-sales support. If you have any questions or encounter issues with your product, please contact ANENG customer service for assistance. They can provide satisfactory solutions in a timely manner.
- Quality Issues: For quality problems not caused by human error, contact customer service for replacement services or refunds.
- Product Not Operating Properly: Provide a detailed video of the product not operating normally to ANENG customer service for expert diagnosis and solutions.
- Questions About Product Use: This product requires a certain degree of electrical knowledge. If you encounter operational problems or do not understand how to use the product, contact ANENG customer service for assistance.
- Artificially Damaged Product: This brand is primarily used to detect electrical and other measurement products. It requires a certain degree of electrical knowledge. Pay attention to the use of certain operating procedures, select the correct measurement method, and avoid dangerous events. If the customer uses the product improperly and the use method is not equal, resulting in damage to the product, it will be judged as man-made damage, which is not within the scope of after-sales service of the product. However, you can contact ANENG customer service to receive a certain amount of coupons to deduct the newly purchased ANENG products.
Image: ANENG's after-sales service guidelines.
10. Product Demonstration Video
Video: A short demonstration of the ANENG 621A Multimeter's features and measurement capabilities.