OUGETHER 620A Digital Multimeter Tester User Manual

1. Important Safety Information

Please read and understand all safety warnings and operating instructions before using this digital multimeter. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Always ensure the multimeter is in the correct measurement mode and range before connecting to a circuit.
• Do not attempt to measure current by directly contacting the probes to a voltage source, as this can damage the instrument. Current measurements require series connection to the circuit.
• Verify the meter's functionality on a known voltage source before use.
• Do not use the multimeter if it appears damaged or if the test leads are damaged.
• Observe all local and national safety codes.
• This device features built-in dual fuses with anti-burn and overload protection for enhanced safety.

2. Package Contents

Upon opening the package, please verify that all the following items are included:

• 1 x OUGETHER 620A Digital Multimeter
• 1 x Multimeter Test Pen Cable (approximately 102cm)
• 1 x Temperature Cable
• 1 x Instruction Manual

Note: 2 x 1.5V AAA batteries are required for operation and are not included in the package.

Image: The OUGETHER 620A Digital Multimeter, along with its test leads, temperature probe, and user manual, as packaged.

3. Product Overview

3.1. Components and Features

Image: A detailed view of the multimeter with its key components labeled, including the flashlight, voltage detection area, silicone protective cover, screen backlight, mA/10A current input jack, switch button, data hold/backlight screen button, flashlight/NCV button, SEL function key, red stylus input jack, and black pen input jack.

• Large LCD Display: 4.77-inch LCD screen for clear readings.
• Backlight and Flashlight: Upgraded dual bulb flashlight for use in dimly lit areas.
• Smart Auto-Ranging: Automatically selects the correct measurement range.
• Input Jacks: Dedicated jacks for mA/10A current, and common (COM) and voltage/resistance/capacitance inputs.
• Function Buttons: Buttons for data hold, backlight, NCV, and function selection (SEL).

3.2. Display Indicators

The 4.77-inch LCD displays measurement values, units, and various indicators:

• AUTO: Indicates auto-ranging mode.
• DC/AC: Indicates direct current/voltage or alternating current/voltage.
• Units: V (Volts), A (Amps), Ω (Ohms), F (Farads), Hz (Hertz), °C/°F (Celsius/Fahrenheit).
• NCV: Non-Contact Voltage detection indicator.
• LIVE: Live wire detection indicator.
• Battery Icon: Indicates low battery status.

Image: The multimeter's full-screen display highlighting its capabilities including AC/DC voltage/current, capacitance, buzzer, NCV, temperature, diode, resistance, and Zero FireWire/Hz detection.

4. Setup

4.1. Battery Installation

The multimeter requires two 1.5V AAA batteries for operation. To install:

1. Locate the battery compartment on the back of the multimeter.
2. Open the battery cover.
3. Insert two AAA batteries, ensuring correct polarity (+ and -).
4. Close the battery cover securely.

4.2. Initial Power On

After battery installation, press the power button to turn on the multimeter. The device will automatically enter auto-ranging mode. The LCD screen will automatically turn off after 15 minutes of inactivity to conserve battery life.

5. Operating Instructions

The OUGETHER 620A multimeter features smart auto-ranging, simplifying operation. Simply select the desired function using the SEL button if needed, and the meter will automatically adjust the range.

5.1. DC Voltage Measurement (V=)

To measure DC voltage:

1. Insert the red test lead into the VΩmA input jack and the black test lead into the COM input jack.
2. Connect the test leads across the component or circuit to be measured.
3. The display will show the DC voltage reading.

Image: This image illustrates various measurement functions of the multimeter, including DC voltage measurement where the meter automatically identifies and displays the voltage when probes contact the positive and negative terminals of a battery.

5.2. AC Voltage Measurement (V~)

To measure AC voltage:

1. Insert the red test lead into the VΩmA input jack and the black test lead into the COM input jack.
2. Connect the test leads across the AC voltage source.
3. The display will show the AC voltage reading and frequency (Hz).

Refer to the video in Section 4.2 for a demonstration of AC voltage measurement.

5.3. Current Measurement (DC/AC)

Important Safety Note: Current measurements must always be performed with the multimeter connected in series with the circuit. Never connect the multimeter in parallel across a voltage source when in current measurement mode, as this will damage the instrument.

Image: This diagram clearly shows the correct method for measuring AC current by connecting the multimeter in series with the circuit, and warns against the incorrect method of direct contact measurement which can damage the device.

To measure current:

1. Determine the expected current range. For mA range, insert the red test lead into the mA/10A input jack. For 10A range, insert the red test lead into the mA/10A input jack. The black test lead always goes into the COM input jack.
2. Break the circuit and connect the multimeter in series with the load.
3. The display will show the current reading.

Refer to the video in Section 4.2 for a demonstration of AC current measurement.

5.4. Resistance Measurement (Ω)

To measure resistance:

1. Ensure the circuit is de-energized before measuring resistance.
2. Insert the red test lead into the VΩmA input jack and the black test lead into the COM input jack.
3. Connect the test leads across the resistor or component.
4. The display will show the resistance reading.

5.5. Capacitance Measurement (F)

To measure capacitance:

1. Ensure the capacitor is fully discharged before measurement to prevent damage to the meter or injury.
2. Insert the red test lead into the VΩmA input jack and the black test lead into the COM input jack.
3. Connect the test leads across the capacitor terminals.
4. The display will show the capacitance reading.

5.6. Temperature Measurement (°C/°F)

To measure temperature:

1. Insert the temperature probe into the appropriate input jacks (usually VΩmA and COM, or dedicated temperature jacks if available).
2. Place the tip of the temperature probe on the object or area whose temperature is to be measured.
3. The display will show the temperature reading in Celsius or Fahrenheit.

Refer to the video in Section 4.2 for a demonstration of temperature measurement.

5.7. Non-Contact Voltage (NCV) Detection

The NCV function allows for detection of AC voltage without direct contact, useful for identifying live wires.

1. Press the NCV button to activate the NCV mode.
2. Move the top of the multimeter close to the wire or outlet.
3. If AC voltage is detected, the meter will beep and the NCV indicator on the display will show a signal strength bar.

Refer to the video in Section 4.2 for a demonstration of NCV detection.

5.8. Diode Test

To test diodes:

1. Insert the red test lead into the VΩmA input jack and the black test lead into the COM input jack.
2. Connect the red lead to the anode and the black lead to the cathode of the diode. A forward voltage drop will be displayed.
3. Reverse the leads. An open circuit (OL) reading indicates a good diode.

5.9. Continuity Test (Buzzer)

To test for continuity:

1. Insert the red test lead into the VΩmA input jack and the black test lead into the COM input jack.
2. Connect the test leads across the circuit or component.
3. If continuity exists (low resistance), the buzzer will sound.

6. Maintenance

Proper maintenance ensures the longevity and accuracy of your multimeter.

• Cleaning: Use a soft, damp cloth to clean the casing. Do not use abrasive cleaners or solvents.
• Battery Replacement: Replace batteries when the low battery indicator appears on the display.
• Storage: Store the multimeter in a cool, dry place away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods.
• Calibration: The instrument specifies one year as a cycle for re-calibration. This should be performed under controlled conditions (18℃~28℃, with relative humidity less than 75%).

7. Troubleshooting

If you encounter issues with your multimeter, refer to the following common problems and solutions:

If the problem persists after attempting these solutions, please contact customer support.

8. Specifications

Detailed technical specifications for the OUGETHER 620A Digital Multimeter:

Image: A table summarizing the functions, ranges, resolutions, and precision of the OUGETHER 620A Multimeter, including details on NCV induction, Live Zero Live, Buzzer, Diode, Material, Battery type, Gauge bus length, Weight, and Maximum count.

9. Warranty and Support

This product is manufactured by OUGETHER.

For information regarding warranty coverage, returns, or technical support, please refer to the purchase platform or contact OUGETHER customer service directly. Standard return policies typically allow for returns within 30 days of purchase.

For further assistance, please visit the official OUGETHER store or contact their support channels.

Manufacturer: OUGETHER