ANENG 621A Digital Multimeter User Manual

1. Introduction

Thank you for choosing the ANENG 621A Digital Multimeter. This device is a smart, portable, and rechargeable tool designed for precise electrical measurements. It features a color touch screen and automatic range selection, making it suitable for both professional and DIY applications. This manual provides essential information for safe operation, proper use, and maintenance of your multimeter.

2. Safety Information

Always adhere to safety precautions when using any electrical testing equipment. Failure to do so may result in electric shock, injury, or damage to the multimeter or equipment under test.

• Do not exceed the maximum input values for any measurement range. Refer to the specifications section for limits.
• Ensure test leads are properly connected and in good condition before each use. Inspect for any damage to insulation.
• Avoid contact with live circuits when connecting or disconnecting test leads.
• Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC, as these pose a shock hazard.
• The multimeter is equipped with a double fuse for overload protection. Do not attempt to bypass or replace with incorrect fuses.
• The device features a shockproof ABS casing with a soft rubber grip for enhanced durability and protection against drops. However, avoid unnecessary physical impact.
• Do not operate the multimeter if it appears damaged or if the casing is open.
• Keep hands and fingers behind the probe barriers when making measurements.

3. Product Overview

The ANENG 621A is a compact and versatile digital multimeter. It features a large, backlit color touch screen for clear readings and intuitive operation.

3.1. Components and Display

Image: ANENG 621A Digital Multimeter and its comprehensive accessory kit.

The multimeter's display shows measurement values, units, battery status, and selected modes. The touch screen allows for easy selection of functions.

Image: Detailed view of the ANENG 621A's sensitive touch screen for function selection.

3.2. Included Accessories

The package includes the following items:

• ANENG 621A Digital Multimeter
• Combined Test Lead Set (includes 4 connection plugs, 2 PVC cables, 2 copper needles, 2 U-shaped inserts, 2 measuring pens, 2 alligator clips, 2 piercing needles)
• Standard Multimeter Test Leads
• Temperature Probe
• USB Type-C Charging Cable
• Instruction Manual (this document)
• Storage Bag

4. Setup

4.1. Initial Charging

The ANENG 621A Multimeter is powered by a rechargeable lithium battery. Before first use, or if the battery indicator shows low power, charge the device using the provided USB Type-C cable.

1. Connect the Type-C end of the charging cable to the multimeter's charging port.
2. Connect the USB-A end to a standard USB power adapter (not included) or a computer USB port.
3. The battery indicator on the screen will show charging status. Charge until the indicator shows a full battery.

Image: The ANENG 621A Multimeter connected for charging via its Type-C port.

4.2. Connecting Test Leads

Always ensure the multimeter is off before connecting or disconnecting test leads.

1. Insert the black test lead into the COM (common) input jack.
2. Insert the red test lead into the appropriate input jack for your measurement:
   • For Voltage, Resistance, Capacitance, Diode, Continuity, Frequency, and Temperature measurements, use the VΩHzCAP jack.
   • For Current measurements (mA/A), use the 10A/mA jack.
3. Ensure a secure connection for both leads.

5. Operating Instructions

The ANENG 621A features a smart mode that automatically identifies measurement types. You can also manually select specific functions via the touch screen.

Image: Overview of various measurement functions and their display on the ANENG 621A multimeter.

5.1. Power On/Off

Press and hold the power button (usually indicated by a power symbol) on the touch screen to turn the multimeter on or off.

5.2. Smart Mode (AUTO)

Upon powering on, the multimeter defaults to Smart Mode. In this mode, the device automatically detects and measures AC/DC voltage, resistance, and continuity without manual selection. Simply connect the test leads to the circuit, and the multimeter will display the relevant measurement.

Image: The ANENG 621A Multimeter in AUTO mode, measuring AC voltage and frequency from a power outlet.

5.3. Manual Function Selection

To select a specific measurement function, tap the corresponding icon on the touch screen. Available functions include:

• AC/DC Voltage (V~ / V-): Measures alternating or direct current voltage. Connect leads in parallel to the circuit.
• AC/DC Current (A~ / A-): Measures alternating or direct current. Connect leads in series with the circuit. Ensure the correct input jack (10A/mA) is used.
• Resistance (Ω): Measures electrical resistance. Ensure the circuit is de-energized before measuring.
• Continuity Test (): Checks for an unbroken path in a circuit. An audible beep indicates continuity.
• Diode Test (): Measures the forward voltage drop of a diode.
• Capacitance (F): Measures the capacitance of capacitors. Ensure capacitors are discharged before testing.
• Frequency (Hz): Measures the frequency of an AC signal.
• Temperature (°C/°F): Use the included temperature probe to measure temperature.

5.4. Non-Contact Voltage (NCV) Detection

The NCV function allows for detection of AC voltage without direct contact with conductors. This is useful for identifying live wires or checking for voltage in cables.

Image: The ANENG 621A Multimeter detecting non-contact voltage, indicated by signal bars and an audible alarm.

5.5. Live Wire Detection

This function helps identify the live wire in an AC circuit. Select the 'Live' function and touch the red test probe to the conductor. The display will indicate if it's a live wire.

5.6. Data Hold (HOLD)

Press the 'HOLD' button on the touch screen to freeze the current reading on the display. Press again to release.

5.7. Flashlight and Backlight

The multimeter includes a built-in flashlight for illuminating dark work areas and a backlit display for clear visibility in low-light conditions. Activate these features via the respective icons on the touch screen.

Image: The ANENG 621A Multimeter demonstrating its flashlight and backlit display for use in dim environments.

6. Maintenance

6.1. Cleaning

Wipe the multimeter casing with a damp cloth and mild detergent. Do not use abrasive cleaners or solvents. Ensure the device is off and disconnected from any circuits before cleaning.

6.2. Battery Charging

Recharge the battery as needed. The multimeter will enter sleep mode automatically if no action is performed for a period, conserving battery life.

6.3. Storage

Store the multimeter and its accessories in the provided storage bag in a cool, dry place, away from direct sunlight and extreme temperatures. Remove test leads before storing.

Image: The ANENG 621A Multimeter's shockproof silicone sleeve provides protection against impacts.

7. Troubleshooting

If you encounter issues with your ANENG 621A Multimeter, refer to the following common problems and solutions:

• Multimeter does not power on: Ensure the battery is charged. Connect the Type-C charging cable and allow it to charge for at least 30 minutes before attempting to power on again.
• No reading or 'OL' (Overload) displayed: Check if the test leads are properly connected to the correct input jacks for the selected function. Ensure the circuit is within the multimeter's measurement range. For resistance, ensure the circuit is de-energized.
• Inaccurate readings: Verify that the test leads are making good contact with the circuit. Ensure the correct measurement function is selected. Check for any external interference.
• Continuity test not beeping: Confirm that the circuit path is complete and that the resistance is below the continuity threshold (typically less than 50Ω).
• Screen unresponsive: Try restarting the multimeter. If the issue persists, ensure the battery is adequately charged.

For persistent issues not covered here, please contact ANENG customer support.

8. Specifications

Below are the technical specifications for the ANENG 621A Digital Multimeter:

Image: Physical dimensions of the ANENG 621A Multimeter.

9. Warranty and Support

ANENG offers lifetime service and technical support for the 621A Digital Multimeter. For any inquiries, technical assistance, or warranty claims, please contact ANENG customer service through your purchase platform or the official ANENG website.