1. Introduction
The ANENG 621A is a smart, rechargeable digital multimeter designed for precise electrical measurements. Featuring a backlit color touchscreen and auto-ranging capabilities, it simplifies testing for both professionals and DIY enthusiasts. This manual provides detailed instructions for the safe and effective use of your multimeter.
Key Features:
- Precise Measurements: Capable of measuring AC/DC Current, Resistance, Frequency, Diode, AC/DC Voltage, Capacitance, VA Reverse Display, and NCV Induction.
- Smart Mode & Touch Screen: Automatically identifies measurement content and selects the best resolution. Features a large LCD color display and a built-in flashlight for easy reading in various lighting conditions.
- Rechargeable & Portable: Compact design with Type-C charging, ensuring convenience and long-lasting operation. Includes an automatic sleep mode to conserve battery.
- Enhanced Safety: Equipped with a double fuse for overload protection and a shockproof ABS casing with a soft rubber grip for durability and user safety.
2. Package Contents
Please verify that all items listed below are included in your package:
- 1 x ANENG 621A Digital Multimeter
- 1 x Combined Test Lead Set (includes 4 connection plugs, 2 PVC cables, 2 copper needles, 2 U-shaped inserts, 2 measuring pens, 2 crocodile clips, 2 puncture needles)
- 1 x Standard Multimeter Test Lead
- 1 x Temperature Probe Line
- 1 x Type-C Charging Cable
- 1 x Instruction Manual
- 1 x Storage Bag
Image: The ANENG 621A Digital Multimeter displayed with its comprehensive set of accessories, including various test leads, probes, charging cable, and storage bag.
3. Safety Information
To ensure safe operation and avoid damage to the multimeter or injury to yourself, please read and follow all safety instructions carefully.
- Always ensure the multimeter is set to the correct function and range before making measurements.
- Do not exceed the maximum input values for any range as specified in the technical specifications.
- Inspect test leads for any damage (e.g., cracked insulation, exposed metal) before each use. Replace damaged leads immediately.
- Use extreme caution when working with live circuits. Avoid touching exposed wires or terminals.
- Do not use the multimeter if it appears damaged or is not operating properly.
- The device is protected by a double fuse. Do not attempt to bypass or replace fuses with incorrect ratings.
- The shockproof ABS casing provides protection against drops, but avoid excessive physical impact.
4. Setup
4.1 Charging the Multimeter
The ANENG 621A comes with a built-in rechargeable lithium battery. Before first use, or when the low battery indicator appears, charge the device using the provided Type-C charging cable.
- Connect the Type-C end of the charging cable to the charging port on the side of the multimeter.
- Connect the USB-A end of the charging cable to a standard USB power adapter (e.g., phone charger, computer USB port).
- The battery indicator on the display will show the charging status. Disconnect once fully charged.
Image: The ANENG 621A Multimeter connected to a power source via its Type-C charging cable, illustrating the rechargeable feature.
4.2 Initial Power On
To turn on the multimeter, press and hold the power button located on the device. The display will illuminate, and the device will typically start in Smart Mode.
4.3 Connecting Test Leads
Proper connection of test leads is crucial for accurate and safe measurements.
- For most measurements (Voltage, Resistance, Diode, Capacitance, Frequency), insert the red test lead into the 'VΩmA' jack and the black test lead into the 'COM' (common) jack.
- For high current measurements (up to 10A), insert the red test lead into the '10A MAX' jack and the black test lead into the 'COM' jack.
5. Operating Modes and Measurements
The ANENG 621A features a smart mode for automatic detection and various manual functions accessible via the touchscreen.
5.1 Smart Mode (AUTO)
This is the default mode upon power-on. In Smart Mode, the multimeter automatically identifies the measurement type (AC/DC Voltage, Resistance, Continuity) and selects the appropriate range. This simplifies operation for common tasks.
5.2 Voltage Measurement (AC/DC)
To measure voltage, connect the test leads in parallel across the component or circuit you wish to measure. The multimeter will automatically detect whether it's AC or DC voltage.
Image: The ANENG 621A Multimeter displaying an AC voltage reading while its probes are inserted into a wall outlet, demonstrating its voltage measurement capability.
5.3 Resistance Measurement (Ω)
Before measuring resistance, ensure the circuit is de-energized and any capacitors are discharged. Connect the test leads across the component to measure its resistance.
5.4 Frequency Measurement (Hz)
To measure frequency, connect the test leads to the circuit where you want to determine the frequency of the AC signal.
5.5 Diode Test (▶|)
Ensure the circuit is de-energized. Connect the red test lead to the anode and the black test lead to the cathode of the diode. The display will show the forward voltage drop. Reverse the leads to check for open circuit (OL) in reverse bias.
5.6 Capacitance Measurement (⫫)
Always discharge capacitors before testing to prevent damage to the multimeter. Connect the test leads across the capacitor terminals.
5.7 NCV (Non-Contact Voltage) Induction
The NCV function allows for detection of AC voltage without direct contact. Hold the top of the multimeter near a live wire or electrical outlet. The device will emit an audible alarm and display a signal bar indicating the presence and strength of the AC voltage field.
Image: The ANENG 621A Multimeter detecting voltage without contact, showing the NCV function active with a signal bar indicating voltage presence near a wall outlet.
5.8 Live Zero Fire Detection (Live)
This function helps distinguish between live (hot) and neutral wires. Use the appropriate test lead (usually red) to probe the wire. The display will indicate if it's a live wire.
5.9 Current Measurement (AC/DC)
To measure current, the multimeter must be connected in series with the circuit. Ensure the circuit is de-energized before connecting the multimeter. Use the appropriate current input jack (mA or 10A) and select the correct current function.
Image: The ANENG 621A Multimeter connected in series to a simple circuit with a light bulb, displaying a current reading in milliamperes (mA).
5.10 Flashlight and Screen Brightness
The multimeter includes a built-in flashlight for illuminating dark work areas. The backlit VA reverse display ensures clear visibility of readings even in dim or bright environments.
Image: The ANENG 621A Multimeter demonstrating its integrated flashlight for low-light conditions and the clear visibility of its display in both dark and bright environments.
6. Maintenance
6.1 Cleaning
To clean the multimeter, wipe the device with a dry, soft cloth. Do not use abrasive cleaners, solvents, or corrosive chemicals, as these may damage the casing or display.
6.2 Battery Care
The multimeter uses a rechargeable lithium battery. To maximize battery life:
- Recharge the battery promptly when the low battery indicator appears.
- Avoid fully discharging the battery for extended periods.
- If storing the multimeter for a long time, charge it to approximately 50% capacity every few months.
6.3 Storage
Store the ANENG 621A Multimeter in a cool, dry place, away from direct sunlight, extreme temperatures, and high humidity. Use the provided storage bag to protect it from dust and physical damage.
Image: The ANENG 621A Multimeter encased in its durable, shockproof silicone sleeve, highlighting its robust construction designed to withstand impacts.
7. Troubleshooting
If you encounter issues with your ANENG 621A Multimeter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Multimeter does not power on. | Low battery or no charge. | Charge the multimeter using the Type-C cable. |
| Inaccurate readings. | Incorrect test lead connection, damaged leads, or environmental interference. | Verify test lead connections. Inspect leads for damage. Ensure proper measurement technique. |
| No NCV detection. | NCV function not active or weak signal. | Ensure NCV function is selected. Move closer to the voltage source. |
| Display shows 'OL' (Overload) during measurement. | Measurement exceeds the selected range or a fuse is blown (for current). | If in manual mode, select a higher range. For current, check if the fuse needs replacement by a qualified technician. |
8. Technical Specifications
| Feature | Specification |
|---|---|
| Model Number | 621A |
| Display | Backlit Color Touchscreen, VA Reverse Display |
| Display Counts | 9999 |
| Power Source | Rechargeable Lithium-metal Battery (1 required, included) |
| Charging Port | Type-C |
| Product Dimensions | 10 x 10 x 2 cm (approx. 3.94 x 3.94 x 0.79 inches) |
| Weight | 0.6 g (approx. 0.02 oz) - Note: This weight seems incorrect and likely refers to a component. Actual product weight will be higher. |
| Measurement Type | Multimeter (AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Diode, NCV, Live Zero Fire) |
| Safety Rating | CAT III (600V) |
| Special Features | Auto-ranging, True RMS (TRMS), NCV Induction, Live Zero Fire Detection, Flashlight, Automatic Sleep Mode, Shockproof Silicone Sleeve |
Image: A diagram illustrating the compact dimensions of the ANENG 621A Digital Multimeter, showing its height and width measurements.
9. Warranty and Support
ANENG provides comprehensive support for its products. The ANENG 621A Digital Multimeter comes with lifetime service and technical support.
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact ANENG customer service through the retailer or official ANENG support channels. Please have your product model number (621A) and purchase information ready when contacting support.
