ANENG 612 Smart 3-in-1 Digital Multimeter User Manual

1. Introduction

This manual provides essential safety information, operation instructions, specifications, and maintenance guidelines for the ANENG 612 Digital Multimeter. This compact, hand-held, and battery-operated instrument is a 3 3/4 digits, 4000 counts auto-ranging DMM. It performs AC/DC voltage, AC/DC current, resistance, audible continuity, diode, frequency, and temperature measurements. It also features polarity indication, data hold, over-range indication, and automatic power-off. Designed according to EN61010-1 (CAT IV 600V, Pollution degree 2), it is an ideal tool for various electrical tasks.

Safety Warnings

• Before Use: Inspect the meter case and test leads for any damage, exposed metal, or cracks. Do not use if damaged.
• Voltage Limits: Do not apply voltage exceeding the meter's rated limits between terminals or to ground.
• Proper Settings: Ensure the rotary switch is in the correct position for the measurement. Avoid changing ranges during measurement to prevent damage.
• Electric Shock Hazard: Exercise special care when working with effective voltages over 60V DC or 30V AC RMS due to the risk of electric shock.
• Environment: Do not use or store the meter in high temperature, humidity, explosive, inflammable, or strong magnetic field environments.
• Test Leads: Always keep fingers behind the finger guards when using test leads.
• Capacitors: Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, or diodes.
• Battery: Replace the battery immediately when the battery indicator appears. Low battery can lead to inaccurate readings and potential hazards.
• Servicing: Turn off the meter and disconnect test leads before opening the case. Use only identical replacement parts for servicing.
• Modifications: Do not alter the internal circuit of the meter.
• Cleaning: Use a soft cloth and mild detergent for cleaning. Avoid abrasive cleaners or solvents.
• Storage: Turn off the meter when not in use. Remove batteries if storing for a long period to prevent leakage and damage.

2. Package Contents

The ANENG 612 Digital Multimeter package typically includes the following items:

• 1 x ANENG 612 Digital Multimeter
• 1 x Storage Bag
• 1 x Packaging Color Box
• 1 x Instruction Manual (this document)
• 1 x Pair of Test Leads (Test Pen Line)
• Optional: 1 x 16-in-1 Combination Line (depending on chosen variant)

3. Setup

3.1 Battery Installation

The ANENG 612 Multimeter requires two AAA 1.5V batteries (not included with shipment) for operation. Follow these steps to install them:

1. Locate the battery compartment cover on the back of the multimeter.
2. Remove the back battery compartment cover.
3. Insert two AAA 1.5V batteries, ensuring correct polarity (+ and -).
4. Replace the battery compartment cover and secure it.

4. Controls and Display

The ANENG 612 Multimeter features a clear LCD display and intuitive controls for various functions.

4.1 Button Functions

• RANGE button: Short-press to enter manual range mode or shift range. Long-press to return to auto-range mode.
• SELECT button: Function selection button, used for multi-function options on the rotary switch.
• H/☀ button: Data-hold or backlight button. Short-press to hold or release data. Long-press to turn on/off the backlight.
• MODE button: Time/Alarm shift button. On Time or Alarm mode, press and hold for more than 3 seconds to enter its setting mode.
• ADJ button: Time/Year shift button. Activates or disables the Alarm function in Alarm mode. Adjusts values in setting mode.
• °F/°C button: Toggles between Fahrenheit and Celsius temperature measurement modes.

4.2 Display Features

• Measurement Display Area: Shows the primary measurement reading.
• Perpetual Calendar: Displays current date (Month, Day, Week, Year).
• Alarm Clock: Displays alarm time.
• Temperature & Humidity Display: Shows real-time temperature (°C/°F) and humidity (%).
• Function Indicators: Icons for AC/DC voltage, current, capacitance, resistance, diode, buzzer, Hz, low battery, auto power off, data retention, and screen backlight.

5. Operating Instructions

5.1 General Operations

• Data Hold: Press the H/☀ button to freeze the current reading on the LCD. The "H" icon will appear. Press again or change function to exit.
• Auto Power Off: The meter automatically turns off after approximately 15 minutes of inactivity to save battery. Rotate the function rotary switch or press any button to turn it back on. This function does not affect Time and Calendar modes.
• Time and Calendar Setting: In Time mode, long-press the MODE button for >3 seconds. Blinking digits indicate setting mode. Use MODE to select the item (12/24 type, hour, minute, year, month, day) and ADJ to adjust the value. Press MODE again to exit.
• Alarm Setting: In Alarm mode, long-press the MODE button for >3 seconds. Blinking digits indicate setting mode. Use MODE to select hour/minute and ADJ to adjust. Press MODE again to exit.

5.2 Measuring Voltage (AC/DC)

1. Connect the BLACK test lead to the "COM" jack and the RED test lead to the "VΩmA" jack.
2. Set the function rotary to V (AC Voltage) or V... (DC Voltage) range.
3. Select auto range or manual range using the "RANGE" button. If the voltage is unknown, start with the highest range in manual mode.
4. Connect the test leads across the source or load to be measured.
5. Read the value on the LCD display. For DC measurements, the polarity of the RED lead connection will be indicated.

5.3 Measuring Current (AC/DC)

1. Connect the BLACK test lead to the "COM" jack.
2. For currents less than 500mA, connect the RED test lead to the "mA" jack. For currents between 400mA and 10A, connect the RED test lead to the "10A" jack.
3. Set the function rotary to the desired mA~/A~ (AC Current) or mA-/A- (DC Current) range.
4. If the current magnitude is unknown, start with the highest range and reduce it until a satisfactory resolution is obtained.
5. Select AC or DC current measurement using the "SELECT" button.
6. Connect test leads in series with the circuit to be measured.
7. Read the value on the display. For DC current, polarity will be indicated.

Important: AC and DC current measurements require series connection to the circuit. Do not directly contact measuring current like measuring voltage, as this will burn out the instrument!

5.4 Measuring Resistance

1. Connect the BLACK test lead to the "COM" jack and the RED test lead to the "VΩmA" jack.
2. Set the function rotary to the Ω range.
3. Select auto range or manual range with the "RANGE" button.
4. Connect the test leads across the load to be measured.
5. Read the value on the display.

5.5 Continuity Test (Buzzer)

1. Connect the BLACK test lead to the "COM" jack and the RED test lead to the "VΩmA" jack.
2. Set the function rotary to the Ω»)) range.
3. Press the "SELECT" button to select continuity test mode. The "»))" symbol will appear.
4. Connect the test leads across the load to be measured.
5. If the circuit resistance is lower than about 50Ω, the built-in buzzer will sound, indicating an unobstructed path. A silent sound indicates damage or an open circuit.

5.6 Diode Test

1. Connect the BLACK test lead to the "COM" jack and the RED test lead to the "VΩmA" jack.
2. Set the function rotary to the Ω»)) range.
3. Press the "SELECT" button to select diode test mode. The "→|" symbol will appear.
4. Connect the RED test lead to the anode of the diode and the BLACK test lead to the cathode.
5. The meter will show the approximate forward voltage drop. If connections are reversed, "OL" will be displayed.

5.7 Capacitance Measurement

1. Connect the BLACK test lead to the "COM" jack and the RED test lead to the "VΩmA" jack.
2. Set the function rotary to the ∔ range.
3. Connect test leads across the capacitor under measure, observing polarity.
4. Read the value on the display.

5.8 Frequency Measurement (Hz)

1. Connect the BLACK test lead to the "COM" jack and the RED test lead to the "VΩmA" jack.
2. Set the function rotary to the Hz range.
3. Connect the test leads across the source to be measured.
4. Read the value on the display.

5.9 Temperature and Humidity Display

The ANENG 612 Multimeter can display real-time temperature and humidity, allowing you to monitor environmental changes.

1. Set the function rotary to the °C/°F range.
2. Press the "°F/°C" button to select either Celsius (°C) or Fahrenheit (°F) mode. The corresponding symbol will appear.
3. The display will show the current temperature and humidity.

6. Specifications

The following table details the technical specifications of the ANENG 612 Digital Multimeter:

Note: The parameters are for reference only, and the specific actual measurement shall prevail.

General Characteristics

• Display: 4000 counts, updates 3 times/sec
• Polarity Indication: "-" displayed automatically
• Over-range Indication: "OL" displayed
• Low Battery Indication: "Battery Icon" displayed
• Range Select: Auto or Manual
• Operation Temperature: 0°C to 40°C, ≤ 80%RH
• Storage Temperature: -10°C to 50°C, <85%RH
• Battery Type: Size AAA 1.5V x 2 battery
• Overload Protection:
  • "mA" jack: F0.5A/250V fuse
  • "10A" jack: Unfused
• Max. Input Current:
  • "mA" jack: 400mA
  • "10A" jack: 10A (For measurements >1A: duration <7 seconds, interval >1 minute)
• Input Impedance: 10MΩ
• Max. Input Voltage: 600V DC/600V AC RMS
• Frequency Range: 40Hz~400Hz, True-RMS

7. Maintenance

7.1 Battery Replacement

When the battery indicator icon appears on the display, it's time to replace the batteries:

1. Turn off the multimeter and disconnect all test leads.
2. Remove the screws securing the back battery compartment cover.
3. Open the cover and replace the exhausted AAA 1.5V batteries with new ones, ensuring correct polarity.
4. Close the battery compartment cover and secure it with screws.

7.2 Fuse Replacement

Fuses rarely need replacement, usually only due to operator error. If a fuse blows:

1. Turn off the multimeter and disconnect all test leads.
2. Open the battery cover (as for battery replacement).
3. Carefully replace the damaged fuse with a new fuse of the specified ratings (e.g., F0.5A/250V for the mA jack).
4. Re-install the battery cover and secure it.

7.3 Cleaning

To clean the surface of the multimeter:

• Use a soft cloth and a mild detergent.
• Do not use abrasive cleaners or solvents, as these can corrode or damage the meter's surface.

8. Troubleshooting

If you encounter issues with your ANENG 612 Multimeter, consider the following general troubleshooting steps:

• No Display/Faint Display: Check battery level and replace if necessary. Ensure batteries are inserted with correct polarity.
• "OL" Indication: This indicates an over-range condition. Select a higher range or ensure the measurement is within the meter's capabilities. For diode tests, it may indicate reversed polarity or an open circuit.
• Inaccurate Readings: Check battery level. Ensure test leads are properly connected and not damaged. Verify the correct function and range are selected for the measurement.
• No Buzzer Sound in Continuity Test: This indicates an open circuit or resistance above approximately 50Ω.
• Meter Not Turning On: Check batteries. Ensure the rotary switch is moved from the OFF position.

For persistent issues, refer to the detailed specifications or contact customer support.

9. User Tips

• Always double-check your connections and selected function/range before taking a measurement to prevent damage to the meter or the circuit.
• When measuring current, remember to connect the multimeter in series with the circuit.
• Utilize the data hold function (H/☀ button) to easily record readings in hard-to-reach areas.
• The built-in perpetual calendar and alarm clock can be useful for time management during projects.
• Keep the meter clean and store it in its provided storage bag to protect it from dust and physical damage.

10. Warranty and Support

This ANENG 612 Digital Multimeter is designed for reliability and performance. For any warranty claims or technical support, please refer to the seller's policies or contact the ANENG Official Store directly. Keep your purchase records for verification.

A digital version of this user manual (PDF) may be available for download from the product's official page or by contacting customer support.