GVDA GD107 Digital Pen Type Multimeter User Manual

1. Introduction

The GVDA GD107 Digital Pen Type Multimeter is a compact and intelligent True RMS multi-meter designed for a wide range of electrical measurements. Its pen-style design offers portability and ease of use for both professionals and hobbyists. This manual provides essential information for safe and effective operation, maintenance, and troubleshooting of your device.

2. Safety Information

Please read this section carefully before using the multimeter to ensure safe operation and prevent potential hazards.

2.1. General Safety Guidelines

• The meter conforms to IEC61010-1 CAT.III 600V overvoltage safety standard and pollution level 2.
• Always 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, as 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, check for cracks or damaged plastic parts in the instrument shell. If found, do not use it.
• Before using, check if the probe is cracked or damaged. If so, replace it with a probe of 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 from electric shock and electric arc when dangerous live conductors are exposed.
• When the "battery" symbol is displayed, replace the battery promptly to prevent measurement errors.
• 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 disassembled or with the battery cover open.
• The meter must only be used with the provided probe to meet safety standards. If the probe is damaged, replace it with one of the same model and electrical specification.

3. Product Overview

3.1. Components and Controls

The GVDA GD107 multimeter features a user-friendly design with clearly labeled components:

1. Input COM terminal
2. Range switching button
3. Data Hold / Flashlight button
4. ON/OFF button
5. Display LCD
6. Indicator light
7. Flashlight
8. Input terminal

3.2. Key Features

• True RMS measurement
• 4000 Counts Digital Display
• Smart (AUTO) Measurement Mode
• DC/AC Voltage Test
• Resistance Test
• Continuity Test
• Capacitance Measurement
• Frequency Measurement
• Diode Measurement
• Live Wire Detecting
• Phase Sequence Detection
• Data Hold Function
• Flashlight
• Auto Power Off
• Low Battery Indication

4. Setup

4.1. Battery Installation

The multimeter requires 2 x 1.5V AAA batteries (not included). Follow these steps to install or replace the batteries:

1. Turn off the meter power and remove the probes from the input terminals.
2. Locate the battery cover on the back of the device.
3. Remove the screw fixing the battery cover and carefully lift off the cover.
4. Remove the old batteries (if any) and replace them with new 1.5V AAA batteries, paying close attention to the correct polarity (+/-).
5. Install the battery cover back to its original position, and fix and lock the battery cover with the screw.

Δ Warning:

• To avoid electric shock or personal injury caused by wrong readings, replace the battery immediately when the low battery indicator appears.
• Do not discharge the battery by shorting it or reversing its polarity.
• To operate and maintain the meter safely, remove the batteries when the device is not used for a long time to prevent battery leakage from damaging the product.

5. Operating Instructions

Before performing any measurements, ensure the multimeter is properly set up and all safety precautions are observed.

Δ Warning:

• Do not measure voltage higher than 600V, otherwise the meter may be damaged.
• Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.
• Before use, test a known voltage with the meter to confirm that the meter is in good working condition.

5.1. Power On/Off

• Press and hold the ⓔ key for about 2 seconds to turn the multimeter ON or OFF.

5.2. Gear Selection (Function Mode)

• Press the FUNC key to cycle through different measurement gears (modes).
• Press and hold the FUNC key for about 2 seconds to return to the intelligent (AUTO) measurement mode.
• The multimeter defaults to intelligent (AUTO) measurement mode upon power-on.

5.3. Data Hold

• Press the H key to turn data holding ON or OFF. When active, the current reading will be frozen on the display.

5.4. Flashlight

• Press and hold the H key for about 2 seconds to turn the flashlight ON or OFF.

5.5. Auto Power Off

• After power on, auto power off is enabled by default, indicated by the "battery" symbol on the display.
• If there is no key operation for approximately 15 minutes, the meter will automatically shut down to conserve battery energy.

5.6. Measurement Operations

The following sections detail specific measurement functions:

5.6.1. Smart (AUTO) Measurement

This mode is the default upon power-on. It automatically identifies and measures DC voltage, AC voltage, resistance, and continuity.

1. Press the ⓔ key to power on. The display will show "Auto" and enter the intelligent measurement mode.
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 measured subject (e.g., a circuit, battery, or resistor). The meter will automatically recognize the signal.
4. When measuring resistance, if the value is less than approximately 50 Ω, the buzzer will sound, indicating continuity.
5. Read the results from the display.

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

5.6.2. Frequency Measurement

1. Press the ⓔ key to power on.
2. Press the FUNC key to select the "Hz" gear.
3. Insert the red probe into the "INPUT" jack and the black probe into the "COM" jack.
4. Contact the probes with both ends of the measured subject.
5. Read the results from the display.

5.6.3. Capacitance Measurement

1. Press the ⓔ key to power on.
2. Press the FUNC key to select the "Cap" gear.
3. Insert the red probe into the "INPUT" jack and the black probe into the "COM" jack.
4. Contact the probes with both ends of the capacitor to be measured.
5. Read the results from the display.

5.6.4. Diode Measurement

1. Press the ⓔ key to power on.
2. Press the FUNC key to select the "Diode" gear.
3. Insert the red probe into the "INPUT" jack and the black probe into the "COM" jack.
4. Connect the red probe to the anode of the diode and the black probe to the cathode of the diode.
5. Read the forward bias value on the display screen.
6. If the test leads are inversely connected to the diode electrodes, the display will show "OL", which helps distinguish the anode and cathode of the diode.

5.6.5. Live Wire Detecting

1. Press the ⓔ key to power on.
2. Press the FUNC key to select the "LIVE" gear.
3. Insert the red probe into the "INPUT" jack and remove the black probe.
4. Use the red probe to contact the conductor.
   • When a weak electric field signal is detected, it will display "---L"; the buzzer will sound slowly, and the green indicator light will turn on.
   • When a strong electric field signal is detected, it will display "---H"; the buzzer will sound quickly, and the red indicator light will turn on.

5.6.6. Phase Sequence Detection

1. Press the ⓔ key to power on.
2. Press the FUNC key to select the "Phase" gear to enter the phase sequence detection state.
3. Follow the on-screen prompts:
   • a) Display the "PA" symbol with the "A" letter flashing. Plug the sensing probe into the first phase line socket and wait for a beep.
   • b) Display the "PAB" symbol with the "B" letter flashing. Plug the sensing probe into the second phase line socket and wait for a beep.
   • c) Display the "PABC" symbol with the "C" letter flashing. Plug the sensing probe into the third phase line socket and wait for a long beep.
   • d) At the end of the test, the display will show the measurement results:
     • "P --- L" symbol indicates a left-handed phase sequence.
     • "P --- R" symbol indicates a right-handed phase sequence.

Note: Please complete the test on the three wires within 1 minute. Otherwise, a detection timeout error will occur, indicated by the "PABC" symbol appearing and the "P" letter flashing. In case of a timeout, return to the phase sequence detection function for retest.

6. Specifications

6.1. General Technical Specifications

• Environment Condition of Use: CAT. III 600V; Pollution level 2, Altitude < 2000m
• Working Temperature & Humidity: 0~40°C (<80% RH, <10°C non-condensing)
• Storage Temperature & Humidity: -10~60°C (<70% RH, remove the battery)
• Temperature Coefficient: 0.1 x accuracy/°C (<18°C or >28°C)
• Max. Voltage between terminals and earth ground: 600V
• Sampling Rate: Approx. 3 times/second
• Display: 4000 counts
• Over Range Indication: "OL"
• Low Battery Indication: Yes (battery symbol displayed)
• Input Polarity Indication: Display "-" for negative polarity
• Power Requirement: 2 x 1.5V AAA batteries (not included)
• Product Weight: Approx. 65g (without battery)
• Product Size: 195 x 29 x 29mm
• Package Weight: 130g
• Package Size: 210 x 50 x 35mm

6.2. Accuracy Specifications

The accuracy applies within one year after calibration. Reference condition: temperature 18°C to 28°C, relative humidity no more than 80%.

Additional specifications:

• DC Voltage Test: Yes (0.8V~600V)
• AC Voltage Test: Yes (0.8V~600V)
• Frequency Measurement: Yes
• Capacitance Measurement: Yes
• Continuity Measurement: Yes
• Diode Measurement: Yes
• Live Wire Detecting: Yes
• Phase Sequence Detection: Yes
• Low Battery Indication: Yes
• Operating Mode: Auto Range
• Operating Temperature: 0~40°C
• DIY Supplies: Electrical
• Certification: CE
• Origin: Mainland China

7. Maintenance

7.1. Cleaning the Multimeter

To maintain the device and ensure accurate readings, follow these cleaning steps:

1. Turn off the meter power and remove all probes from the input terminals.
2. Wipe the case with a damp cloth or a mild detergent. Do not use abrasive cleaners or solvents, as these can damage the plastic.
3. Wipe the contacts in each input socket with a clean swab lightly soaked in alcohol.

Δ Warning:

• Always keep the inside of the meter clean and dry to prevent electric shock or damage to the meter.

8. Troubleshooting

This section provides basic troubleshooting steps for common issues. If the problem persists, consult the official user manual PDF or contact customer support.

• Meter does not power on: Check battery installation and ensure batteries are not depleted. Replace if necessary.
• Inaccurate readings: Ensure probes are securely connected and making good contact with the circuit. Check for low battery indication and replace batteries if shown. Verify the correct measurement mode is selected.
• "OL" displayed: This indicates an over-range condition (measurement exceeds the meter's maximum range) or an open circuit (e.g., when measuring resistance on a broken wire).
• Phase sequence detection timeout: Ensure all three phase lines are tested within 1 minute. Repeat the test if a timeout occurs.

9. User Tips

• For general electrical checks, the "Smart (AUTO) Measurement" mode is highly convenient as it automatically detects the measurement type.
• Always use the flashlight function in dimly lit areas to ensure clear visibility of test points and readings.
• When working with live circuits, utilize the Live Wire Detecting function first to identify live conductors before proceeding with other measurements.
• Keep the probe tips clean to ensure reliable contact and accurate readings.

10. Additional Resources and Support

For a comprehensive guide and detailed diagrams, please refer to the official user manual in PDF format:

Official User Manual (PDF): View User Manual PDF

For further assistance or warranty information, please contact GVDA Tools Store customer support.