ANENG M109 Digital Multimeter User Manual

1. Introduction

The ANENG M109 is a smart voice broadcast, battery-powered, auto-ranging mini digital multimeter featuring a 4000-count LCD display. It offers easy operation and real-time voice broadcast of measurements, making it a versatile tool for various electrical tasks.

2. Safety Information

To prevent potential electrical shock, fire, or personal injury, always adhere to the following safety guidelines. Use the product only as specified; otherwise, the protection provided by the product may be compromised.

• Before each use, inspect the multimeter's casing for any cracks or missing plastic. Verify the integrity of the insulation around the terminals.
• Ensure all measurements are conducted within the allowable measuring range of the device.
• Do not operate the multimeter in environments with explosive gases, vapors, or in damp or wet conditions.
• Exercise extreme caution when measuring voltages exceeding 36V DC or 25V AC to prevent electric shock.
• Incorrect mode or range selection can lead to hazardous situations. The display will show "OL" if the input exceeds the measurement range.
• Inaccurate readings can result from low battery levels. Replace batteries promptly when indicated. Never perform measurements if the battery compartment door is not securely closed.

3. Product Overview

The ANENG M109 features a robust design with a silicone material case for drop protection and a clear LCD display. It includes a rear retractable bracket for easy standing operation.

Panel Introduction:

1. Flashlight lighting
2. Silicone material (for drop protection)
3. SET button: Single press to manually select measurement, long press for 2 seconds to exit "AUTO" mode.
4. Power button: Press and hold for 2 seconds to power on, short press to power off.
5. Current input jack (2A MAX)
6. Black test pen input jack (COM)
7. NCV measurement sensing area
8. LCD high-definition display
9. H/* button: Long press for 2 seconds to turn on the flashlight and backlit screen, short press to keep the current data.
10. NCV button: Long press to enter NCV mode.
11. Red test pen input jack (VΩHz-Live, MAX 500V)

4. Setup

Battery Installation

The ANENG M109 requires two AAA batteries (not included) for operation. To install the batteries:

1. Carefully remove the back support/battery cover of the multimeter.
2. Insert two AAA batteries, ensuring correct polarity.
3. Securely replace the back support/battery cover.

Note: The video demonstrates battery installation from 0:12 to 0:19.

5. Operating Instructions

Button Functions:

• Power Button: Short press to turn on and enter the automatic voltage/resistance recognition mode. Long press (approx. 2 seconds) to turn off.
• H/* Button (Hold/Flashlight/Backlight): Press once to hold the current reading on the display. Press and hold for more than 2 seconds to activate the flashlight and screen backlight. Long press again to turn them off.
• SET Button (Function Switch): Press once to cycle through functions: DCV, ACV, Resistance, Diode, Hz, DCA, ACA, AUTO. Long press for approximately 2 seconds to exit the current function mode and return to the automatic voltage/resistance recognition mode.
• NCV Button: Press once to enter the Non-Contact Voltage (NCV) test mode. Press again to exit NCV mode and return to AUTO mode.
• A Button (Current Selection): Press once to enter current measurement mode. Press again to exit and return to AUTO mode.

Measurement Procedures:

Always ensure the test leads are correctly inserted into the appropriate terminals: the red lead into the (INPUT) terminal and the black lead into the (COM) terminal, unless otherwise specified.

1. DC/AC Voltage Measurement:
   • Upon startup, the multimeter automatically enters AUTO mode, identifying AC or DC voltage.
   • Touch the probes to the correct test points of the circuit.
   • The measured voltage will be displayed on the screen with voice broadcast.

   

2. Resistance/Continuity Measurement:
   • The multimeter will automatically match the resistance measurement.
   • Touch the probes to the desired test points of the circuit.
   • Read the measured resistance on the display.
   • For continuity, the built-in beeper will sound and the LED light will illuminate if the resistance is below 50 Ω, indicating a short circuit.
3. Diode Test:
   • Press the SET button to enter DIODE Mode.
   • Connect the red and black test leads to the anode and cathode of the diode, respectively.
   • The screen will display the forward voltage drop of the diode.
4. Non-Contact Voltage (NCV) Test:
   • Press the NCV button once to enter NCV Mode.
   • Move the multimeter near the area to be tested. The built-in beeper will sound and the central LED light will twinkle when AC voltage is detected. The stronger the voltage, the faster the beeping and twinkling.

   

5. Capacitance Measurement:
   • Important: Before measuring a capacitor, it is essential to short-circuit it to discharge any stored energy for safety reasons.
   • Press the SET button to enter Capacitance Mode.
   • Connect the red probe to the anode side and the black probe to the cathode side of the capacitor.
   • Read the measured capacitance value on the display once the reading stabilizes.
6. Current Measurement (DC/AC):
   • Press the SET or A button to select the current mode. The multimeter can automatically identify AC/DC current in AUTO mode if the current exceeds 10mA.
   • Connect the black test lead to the (COM) terminal and the red test lead to the (2A) terminal.
   • WARNING: Do NOT directly contact the test leads across a voltage source when measuring current. This will burn out the instrument. Connect the multimeter in series with the circuit to measure current.
   • Touch the probes to the correct test points in series with the circuit.
   • Read the measured current on the display.
   • If the input current exceeds 1A, limit the testing time to less than 3 seconds.

   

7. Frequency Measurement:
   • Press the SET button to select Frequency Mode.
   • Connect the black test lead to the (COM) terminal and the red test lead to the (INPUT) terminal.
   • Contact the probes with the test point to be measured.
   • The measured frequency values will be displayed on the screen.

6. Maintenance

• Cleaning: Keep the multimeter clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
• Battery Replacement: When the low battery indicator appears on the display, replace the two AAA batteries promptly to ensure accurate readings. Refer to the 'Battery Installation' section for instructions.
• Storage: If the multimeter will not be used for an extended period, remove the batteries to prevent leakage and damage. Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Test Leads: Regularly inspect the test leads for any signs of damage, such as frayed wires or cracked insulation. Replace damaged leads immediately to ensure safety and accurate measurements.

7. Troubleshooting

• "OL" Displayed: This indicates that the input value is outside the selected measurement range. Adjust the range or ensure the measurement is within the device's capabilities.
• Inaccurate Readings: Check the battery level. Low batteries can lead to incorrect measurements. Replace batteries if necessary. Ensure test leads are properly connected and making good contact.
• No Reading/Device Not Powering On: Check battery installation and ensure batteries are fresh. Verify the power button is pressed correctly (long press for 2 seconds to power on).
• No Voice Broadcast: Ensure the device is powered on and functioning correctly. The voice broadcast may not be triggered if the measured value is unstable.
• AC Current Measurement Warning: Remember, for current measurement, the multimeter must be connected in series with the circuit. Direct contact across a voltage source will damage the instrument.

8. Specifications

General Specifications:

• Display: 4000 counts LCD
• Ranging: Auto
• Material: ABS/Silica gel
• True RMS: Yes (for 15A/15C models, based on manual OCR)
• Data Hold: Yes
• Backlight: Yes
• Flashlight: Yes
• Voice Broadcast: Yes
• Low Battery Indication: Yes
• Auto Power Off: Yes
• Update Rate: 3/s
• Power Supply: 2 x 1.5V AAA batteries (not included)
• Weight: 107.5g
• Test Pen Length: 74cm / 29.1in
• Operating Temperature: 0 ~ 40°C
• Operating Humidity: < 75%
• Storage Temperature: -20 ~ 60°C
• Storage Humidity: < 80%

Electrical Specifications:

Note: The above parameters are for reference only; the actual measurement of the specific equipment shall prevail.

9. User Tips

• Voice Broadcast Language: The multimeter features a smart voice broadcast function, which provides real-time readings in English. There is no option to change the language to Polish, Spanish, or Portuguese.
• Capacitor Discharge: Always remember to discharge capacitors before measuring them to avoid damage to the multimeter and for personal safety.
• Current Measurement Safety: When measuring current, always connect the multimeter in series with the circuit. Never connect it in parallel across a voltage source, as this will cause severe damage to the device.
• Auto Mode Efficiency: Utilize the auto-ranging feature for quick and convenient measurements of voltage and resistance without needing to manually select the range.

10. Warranty and Support

Limited Warranty:

Customers are entitled to a one-year warranty from the date of purchase. This warranty explicitly excludes:

• Fuses and disposable batteries.
• Damage resulting from misuse, accidents, neglect, alteration, contamination, or abnormal operating/handling conditions.
• Failures caused by usage outside the product's specified parameters.
• Normal wear and tear of mechanical components.

Customer Support:

For any after-sales questions or issues encountered during the use of your ANENG M109 multimeter, please contact ANENG customer service. Our team is dedicated to providing timely and satisfactory solutions.

If your product is not operating properly, providing a detailed video of the issue to ANENG customer service can help our experts diagnose and resolve the problem more efficiently.