ANENG 681 Smart Digital Multimeter User Manual

1. Introduction

The ANENG 681 Smart Digital Multimeter is a versatile and intelligent measuring instrument designed for electrical testing. Featuring a large 5-inch LCD display with backlight, NCV non-contact voltage detection, and smart anti-burn protection, it offers reliable and safe measurements for various electrical parameters. This manual provides detailed instructions for the safe and effective use of your multimeter.

2. Safety Information

Always adhere to the following safety precautions to prevent personal injury or damage to the multimeter:

• Do not exceed the maximum input values specified for each measurement range.
• Exercise extreme caution when working with voltages above 36V DC or 25V AC RMS, as they pose a shock hazard.
• Before changing functions, disconnect the test leads from the circuit under test.
• Ensure the test leads are properly connected to the correct input jacks for the desired measurement.
• Do not use the multimeter if it appears damaged or if the insulation on the test leads is compromised.
• Always turn off the power to the circuit and discharge all high-voltage capacitors before measuring resistance, continuity, diodes, or capacitance.
• The built-in anti-burn protection helps prevent damage, but proper usage is still essential for safety.

3. Product Overview

The ANENG 681 Multimeter is designed for ease of use and durability. It features a robust ABS and silicone construction for shock protection.

Figure 3.1: Front view of the ANENG 681 Smart Digital Multimeter, showing the large LCD display and function buttons.

Figure 3.2: The ANENG 681 Multimeter encased in its protective silicone sheath, designed for shock absorption and durability.

3.1 Package Contents

Upon opening the package, verify that all items are present and undamaged:

• 1 x ANENG 681 Digital Multimeter
• 1 x Thermocouple (for temperature measurement)
• 1 x USB Type-C Charging Cable
• 1 x Pair of Test Leads (Red and Black)
• 1 x Carrying Case
• 1 x English User Manual

Figure 3.3: All components included in the ANENG 681 Multimeter package, including the device, test leads, thermocouple, charging cable, and carrying case.

Figure 3.4: The ANENG 681 Multimeter is available in both black and red color variants.

4. Setup

4.1 Initial Charging

The ANENG 681 Multimeter comes with a built-in 3.7V 1200mAh rechargeable lithium battery. Before first use, it is recommended to fully charge the device.

1. Connect the provided USB Type-C charging cable to the multimeter's charging port.
2. Connect the other end of the cable to a standard USB power adapter (not included) or a computer's USB port.
3. The display will indicate charging status. Once fully charged, disconnect the cable.

4.2 Connecting Test Leads

Proper connection of test leads is crucial for accurate and safe measurements.

• Insert the black test lead into the "COM" (Common) input jack.
• Insert the red test lead into the appropriate input jack based on the measurement type:
  • For Voltage (V), Resistance (Ω), Capacitance (F), Diode, Continuity, Frequency (Hz), and Temperature: Use the "VΩHzC" jack.
  • For Current (mA/A): Use the "mA A" jack.

5. Operating Instructions

The ANENG 681 features a smart auto-ranging function, simplifying most measurements.

5.1 Power On/Off

Press the power button to turn the multimeter on or off. The device has an automatic shutdown feature to conserve battery life.

5.2 Auto Measurement Mode

In "Auto" mode, the multimeter automatically identifies the measurement type (AC/DC Voltage, Resistance, Continuity) and selects the appropriate range. This is the default and most convenient mode for general use.

Figure 5.1: The ANENG 681 Multimeter displaying a voltage measurement, demonstrating its clear digital readout and analog bar graph.

5.3 Specific Measurement Functions

To select specific functions not covered by auto mode, or to manually select a range, refer to the function buttons and display indicators.

• Voltage (AC/DC): Connect leads as described in 4.2. The multimeter will automatically detect AC or DC voltage in Auto mode. For manual selection, refer to the specific function button if available.
• Current (AC/DC): Ensure the red lead is in the "mA A" jack. Connect the multimeter in series with the circuit. Select AC or DC current.
• Resistance (Ω): Disconnect power from the circuit. Connect leads across the component.
• Capacitance (F): Discharge capacitors before testing. Connect leads across the capacitor.
• Temperature (°C/°F): Insert the thermocouple into the appropriate jacks (usually VΩHzC and COM). Place the thermocouple tip on the object to be measured.
• Frequency (Hz): Connect leads to the signal source.
• Diode Test: Disconnect power. Connect leads across the diode. The display shows the forward voltage drop.
• Continuity Test: Disconnect power. Connect leads across the circuit. A beep indicates continuity (low resistance).

5.4 NCV (Non-Contact Voltage) Detection

The NCV function allows for safe detection of AC voltage without direct contact.

1. Activate the NCV function (refer to the multimeter's buttons for the NCV symbol).
2. Bring the top of the multimeter (NCV sensing area) close to the conductor or outlet.
3. If AC voltage is detected, the multimeter will flash a red light and sound an alarm, and the analog bar index on the screen will display "EF".

Figure 5.2: Demonstrating the NCV (Non-Contact Voltage) detection feature, where the multimeter detects AC voltage near an outlet and indicates it with an alarm and display change.

5.5 Zero Fire Wire Recognition

This feature helps distinguish between live (fire) and neutral (zero) wires.

1. Adjust the multimeter to the "Live" gear (function).
2. Insert the red test pen into the right socket of the outlet.
3. If it's the live wire, the flashlight will turn red, the arrow signal will be full, and a beep alarm will sound.
4. If it's the neutral wire, the flashlight will not turn red, there will be no beep, and the display will show "---L".

Figure 5.3: Visual guide for using the Zero Fire Wire Recognition feature, showing distinct indications for live (Firewire) and neutral (Zero line) connections.

5.6 Data Hold

Press the "HOLD" button to freeze the current reading on the display. Press it again to release.

5.7 Backlight and Flashlight

The multimeter features a bright backlight for the LCD display and a built-in flashlight for working in dimly lit areas. Refer to the device buttons for activation.

6. Maintenance

6.1 Cleaning

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

6.2 Battery Charging

When the low power warning appears on the display, recharge the multimeter using the provided USB Type-C cable. Regular charging helps maintain battery health.

6.3 Storage

Store the multimeter in its carrying case in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.

7. Troubleshooting

8. Specifications

The following table outlines the technical specifications of the ANENG 681 Smart Digital Multimeter.

Figure 8.1: Detailed parameter information for the ANENG 681 Multimeter, including function ranges, resolutions, and accuracies.

9. Warranty and Support

This product is covered by a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact the retailer.

For technical support, troubleshooting assistance, or inquiries regarding your ANENG 681 Smart Digital Multimeter, please contact your point of purchase or the manufacturer's customer service. You may also visit the official KKnoon website for additional resources.

Note: Product specifications and features are subject to change without prior notice.