GVDA GD119B Digital Multimeter User Manual

1. Introduction

The GVDA GD119B is an intelligent True RMS digital multimeter designed for both professional and home use. It integrates intelligent and manual functions to accurately measure various electrical parameters. This manual provides essential information for safe and effective operation of your device.

2. Safety Information

Before using the instrument, please read this manual carefully and save it for future reference. Always observe the following safety precautions to prevent electric shock, personal injury, or damage to the meter.

2.1. Safety Statement

• Caution: Indicates an operation that may cause damage to the meter or equipment.
• Warning: Indicates an operation that may cause danger to users.

2.2. Safety Instructions

• The meter conforms to IEC61010-1 CAT.III 600V overvoltage safety standard and pollution level 2.
• Read this manual carefully and pay special attention to safety warning information before using the meter.
• Operate the meter according to the manual; otherwise, the protection function provided by the instrument may be damaged or weakened.
• Take special care when measuring values that exceed 60V DC, 30V AC RMS, or 42V. These voltages pose a risk of electric shock.
• Do not measure voltage higher than the rated value between terminals or between terminals and ground.
• Measure a known voltage to check whether the meter works normally. If it is not normal or damaged, do not use it again.
• Before using the meter, check for cracks or damaged plastic parts in the instrument shell. If found, do not use it again.
• Before using the meter, check whether the probe is cracked or damaged. If so, replace the probe with the same model and electrical specification.
• Use the meter according to the measurement category, voltage, or current rating specified in the meter or manual.
• Observe local and national safety regulations. Wear personal protective equipment (such as approved rubber gloves, masks, and flame-retardant clothing) to prevent injury caused by electric shock and electric arc when dangerous live conductors are exposed.
• When the battery symbol is displayed on the meter, replace the battery in time to prevent measurement error.
• Do not use the meter in environments with explosive gas, steam, or high humidity.
• When using the probe, hold your fingers behind the probe finger guard.
• When measuring, connect the null or ground wire first, then the live wire. When disconnecting, disconnect the live wire first, then the null or ground wire.
• Remove the probe from the meter before opening the case or battery cover. Do not use the meter when it is disassembled or the battery cover is open.
• The meter can only be used with the provided probe to meet safety standards. If the probe is damaged and needs replacement, use a probe of the same model and electrical specification.

3. Product Overview

The GVDA GD119B is an intelligent True RMS digital multimeter featuring a full-function design with gear display and an analog bar for multiple displays. It offers intelligent and professional measurement capabilities, making it suitable for electricians, engineers, electronic enthusiasts, and general household use.

Key features include:

• Color Larger HD LCD Display
• Maximum display: 6000 Counts
• Auto range and Manual Range selection
• Sampling Rate: Approximately 3 times per second
• Over range display: "OL" indication
• Low voltage display: Low battery indication
• Working environment: 0-40°C, relative humidity < 80%
• Input Jack LED Indication
• Stable performance, high precision, high reliability, clear readings, and overload protection.

3.1. Packing Contents

The package typically includes the following items:

• 1pc Multimeter (GD119B)
• 1pc Test Lead Cable
• 1pc Cloth Bag
• 1pc K-type Thermocouple Probe
• 1pc User Manual (this document and PDF reference)

4. Setup

4.1. Battery Installation

The GVDA GD119B requires 4 x 1.5V AAA batteries (not included) for operation. Ensure the meter is powered off and test leads are disconnected before proceeding.

1. Locate the battery compartment cover on the back of the multimeter.
2. Use a suitable screwdriver to open the battery compartment.
3. Insert four 1.5V AAA batteries, observing the correct polarity (+/-) as indicated inside the compartment.
4. Replace the battery cover and secure it with the screw.

When the battery symbol is displayed on the meter, replace the batteries promptly to avoid measurement errors.

4.2. Test Lead Connection

Always connect the black test lead to the "COM" (Common) jack. Connect the red test lead to the "INPUT" jack for most measurements (voltage, resistance, capacitance, frequency, diode, continuity, temperature). For current measurements, connect the red test lead to the "A" jack (for 600mA/6A/10A).

5. Operating Instructions

5.1. Power On/Off

• Press and hold the power button () for about 2 seconds to turn the meter on or off.

5.2. Gear Selection (Smart/Auto Mode & Manual Mode)

• The meter defaults to intelligent (AUTO) measurement mode upon power-on. In this mode, it automatically identifies DC voltage, AC voltage, resistance, and continuity.
• To switch to manual mode, press the "SEL" or "FUNC" key.
• Press the "SEL" or "FUNC" key again to cycle through different measurement functions within manual mode.
• To return to intelligent (AUTO) measurement mode, press and hold the "SEL" or "FUNC" key for about 2 seconds.

5.3. Data Hold

• Press the "HOLD" key () to freeze the current reading on the display. Press again to release.

5.4. Flashlight and Backlight

• Flashlight: Press and hold the flashlight button () for about 2 seconds to turn the LED flashlight on or off.
• Backlight: Press the backlight button () to turn the display backlight on or off. (Note: VA screen models may not have this function).

5.5. Input Jack Indicator

When the measurement gear is changed, the corresponding input jack LED will flash 5 times to prompt you to insert the test probe into the correct jack.

5.6. Automatic Current Identification Function

When the red test lead is inserted into the "A" jack, the meter will automatically switch to the "A" (current) gear and activate the current measurement function.

5.7. Auto Power Off

The auto power-off function is enabled by default after power-on, indicated by the "" symbol. If there is no key operation for approximately 15 minutes, the meter will automatically shut down to conserve battery energy. To disable auto power-off, press and hold the power button while turning on the meter; the symbol will not be displayed.

5.8. Measurement Operations

Warning: Do not measure voltage higher than 600V, as this may damage the meter. Exercise extreme caution when measuring high voltage to avoid electric shock or personal injury. Always test with a known voltage first to confirm the meter is functioning correctly.

5.8.1. Smart (AUTO) Measurement

This is the default mode. The meter automatically identifies and measures DC voltage, AC voltage, resistance, and continuity.

1. Power on the meter; "Auto" will be displayed.
2. Insert the red probe into the "INPUT" jack and the black probe into the "COM" jack.
3. Contact the probes with both ends of the circuit or component to be measured. The meter will automatically recognize the signal.
4. For resistance measurements, if the value is less than approximately 50Ω, the buzzer will sound, and the indicator light will turn on.
5. Read the measurement result from the display.

Note: The minimum measurable voltage in this mode is 0.8V.

5.8.2. Professional Measurement (Manual Mode)

For specific measurements, switch to manual mode using the "SEL" or "FUNC" keys.

AC/DC Voltage Measurement

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "V≈" gear.
3. Press "SEL" or "FUNC" again to toggle between AC voltage (displaying "AC") and DC voltage (displaying "DC").
4. Insert the red probe into "INPUT" and the black probe into "COM".
5. Contact the probes with both ends of the measured power supply (in parallel).
6. Read the results from the display.

Resistance Measurement

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "Ω" gear.
3. Insert the red probe into "INPUT" and the black probe into "COM".
4. Contact the probes with both ends of the measured resistance (in parallel).
5. Read the results from the display.

Continuity Test

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "))" gear.
3. Insert the red probe into "INPUT" and the black probe into "COM".
4. Contact the probes with both ends of the measured resistance or circuit (in parallel).
5. If the resistance value is less than approximately 50Ω, the buzzer will sound, and the indicator light will turn on.
6. Read the results from the display.

Frequency/Duty Measurement

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "Hz%" gear.
3. Insert the red probe into "INPUT" and the black probe into "COM".
4. Contact the probes with both ends of the signal source.
5. Read the results from the display.

Capacitance Measurement

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "C/F" gear.
3. Insert the red probe into "INPUT" and the black probe into "COM".
4. Contact the probes with the terminals of the capacitor.
5. Read the results from the display.

Diode Test

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the diode symbol gear.
3. Insert the red probe into "INPUT" and the black probe into "COM".
4. Contact the probes with the diode terminals.
5. Read the forward voltage drop from the display. An audible alarm will sound.

Temperature Measurement

The GD119B includes a K-type thermocouple probe for temperature measurements.

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the temperature gear (often indicated by °C/°F).
3. Connect the K-type thermocouple probe to the appropriate input jacks (usually marked for temperature).
4. Place the tip of the thermocouple probe on or near the object whose temperature is to be measured.
5. Read the temperature from the display.

Non-Contact AC Voltage (NCV) Detection

This function allows detection of AC voltage without direct contact.

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "NCV" gear.
3. Bring the top of the multimeter near an AC voltage source (e.g., an electrical outlet or insulated wire).
4. The meter will indicate the presence of AC voltage with an audible alarm and visual indicators (LEDs).

Live Wire Detection

This function helps identify live wires in an AC circuit.

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "LIVE" gear.
3. Insert the red probe into the "INPUT" jack.
4. Carefully touch the red test lead to the conductor you suspect is live.
5. The meter will provide an audio alarm and visual indication if a live wire is detected.

AC/DC Current Measurement

1. Power on the meter.
2. Press "SEL" or "FUNC" to select the "A" gear.
3. Press "SEL" or "FUNC" again to toggle between AC current and DC current.
4. Insert the red probe into the "A" jack and the black probe into "COM".
5. Connect the meter in series with the circuit to measure current.
6. Read the results from the display.

6. Specifications

6.1. General Technical Specifications

• Counts: 6000 counts
• Display: HD Color Display
• Analog Bar/Gear Display: Yes
• Smart Function (AC/DC Voltage, Resistance, Continuity): Yes
• Auto Identification of Current Input: Yes
• NCV/Live/Continuity Test: Yes (sound and light alarm)
• Continuity: Yes (< 50Ω)
• Diode Test: Yes (sound alarm) (0-3V)
• Bargraph/Data Hold/True RMS: Yes
• Fuse Burning Prompt: Yes
• Input Jack LED Indication: Yes
• Low Battery Indication: Yes
• Auto Power Off: Yes
• Flashlights: Yes
• Power Supply: 4pcs AAA Batteries (not included)
• Product Size: 113x68x19mm
• Package Size: 170x95x50mm
• Package Weight: Approximately 400g
• Operating Mode: Auto Range
• Operating Temperature: 0 - 40 ℃
• DIY Supplies: Electrical
• Certification: CE, FCC
• Origin: Mainland China

6.2. Accuracy Specifications

7. Maintenance

7.1. Cleaning

To clean the meter, wipe the case with a damp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the meter is completely dry before use.

7.2. Replacing Batteries

When the low battery indicator () appears on the display, replace the batteries immediately to ensure accurate measurements.

1. Ensure the meter is powered off and all test leads are disconnected.
2. Open the battery compartment cover on the back of the meter.
3. Remove the old batteries and insert four new 1.5V AAA batteries, observing correct polarity.
4. Close the battery compartment cover securely.

7.3. Replacing Fuse

If the fuse is burnt out, the symbol "FUSE" will be displayed, and current measurement will be disabled. Replace the fuse with one of the same type and rating.

1. Ensure the meter is powered off and all test leads are disconnected.
2. Open the meter casing (refer to the full PDF manual for detailed instructions if needed).
3. Locate the burnt fuse and carefully remove it.
4. Install a new fuse of the correct specification (e.g., 10A/250V for current input).
5. Close the meter casing securely.

8. Troubleshooting

• No Display / Meter Not Turning On: Check battery installation and ensure batteries are not depleted. Replace if necessary.
• "OL" Display: Indicates an over-range condition. The measured value exceeds the meter's maximum range for the selected function. Select a higher range if available, or ensure the measurement is within the meter's capabilities.
• Inaccurate Readings: Check battery level. Ensure test leads are properly connected and not damaged. Verify the correct measurement function and range are selected.
• "FUSE" Display: The fuse for current measurement is blown. Refer to section 7.3 for fuse replacement.
• No Continuity Beep: Check if the circuit resistance is above 50Ω. Ensure test leads are making good contact.

9. User Tips

• Smart Mode Convenience: Utilize the "Smart" (AUTO) mode for quick and general measurements of voltage, resistance, and continuity, as it automatically detects the measurement type.
• Protective Cover: Always use the provided soft protective cover to shield the multimeter from drops and impacts, extending its lifespan.
• Clear Display: The HD color screen and backlight ensure readability in various lighting conditions. Don't forget to use the flashlight in dark environments.
• Safety First: Always double-check your connections and selected mode before making any measurements, especially when dealing with live circuits. The NCV and Live wire detection features are excellent for preliminary safety checks.

10. Warranty and Support

For detailed warranty information, technical support, or service inquiries, please contact GVDA Official Store directly. Refer to the official product page or your purchase documentation for contact details.

A comprehensive user manual in PDF format is available for download: GVDA GD119B User Manual (PDF)