GVDA GD117 Non-contact AC Voltage Detector User Manual

1. Introduction

The GVDA GD117 is a versatile non-contact AC voltage detector designed for electricians and DIY enthusiasts. It functions as an electric measuring pen, offering features such as 12-300V AC voltage detection, live and zero wire distinction, line break point judgment, continuity testing, battery polarity detection, and even includes a flashlight and screwdriver bits for added utility. This manual provides essential information for safe and effective use of the device.

2. Safety Instructions

WARNING: Please read this instruction manual carefully before use and strictly observe all safety rules and warnings listed herein to prevent electric shock or personal injury.

• The protection provided by the stylus can be compromised if not used according to instructions.
• Before each use, test the voltage detector on a known live power supply to ensure it is in good working condition.
• Even if there is no indication or sound alarm, a voltage may still be present. Always exercise caution.
• Do not use the product if it is damaged or not working properly. If a problem is suspected, send it for repair.
• Do not apply more than the rated voltage marked on the probe.
• When testing voltages above 30 volts, be extra careful due to the risk of electric shock.
• Comply with all local and national safety regulations and use appropriate protective equipment as required.
• When the ground of the tested line is not good, the voltage of the measuring wire may be low and the zero line voltage high, affecting readings.
• Ensure the human body is insulated from the earth during use (e.g., wear well-insulated shoes). Contact with electrified objects or large metal areas can affect measurement accuracy.
• This product is primarily for AC city voltage measurement. Measurement deviation may be large for other processed power supply voltages.
• To avoid electric shock, do not use the voltage probe to detect voltage before the battery cover is securely fastened and locked.
• Ensure the human body is insulated from the ground to avoid affecting detection accuracy.

3. Product Overview

Familiarize yourself with the components of your GVDA GD117 voltage detector:

1. Probe (NCV sensor)
2. Flashlight
3. Display
4. Power/light Switch
5. AC test button
6. Conduction/Positive measurement Switch
7. Battery cover

4. Setup

4.1. Battery Installation

The device requires 2 x 1.5V AAA batteries (not included).

1. Rotate the battery cover (component 7) as shown in the diagram.
2. Remove any old batteries if present.
3. Insert new 2 x 1.5V AAA batteries, ensuring correct positive (+) and negative (-) polarity.
4. Replace the battery cover and rotate to secure it.

5. Operating Instructions

5.1. Power On/Off

• To Power On: Press and hold the power key (component 4) for more than 1 second. The buzzer will beep, and the screen will light up, indicating it's in the open state.
• To Power Off: When the meter is on, press and hold the power key (component 4) for more than 1 second. The meter will turn off.

5.2. Flashlight Function

• When the meter is powered on, press the "power/light" button (component 4) to turn on the flashlight.
• Press the "power/light" button again to turn off the flashlight.

5.3. Inductive Mode Measuring (NCV)

This is the default sensing mode upon power-on.

• Place the probe (component 1) close to an AC voltage source.
• The buzzer will sound, and its frequency will increase with the signal strength.
• The display screen will show "U" for weak signals and "HI" for strong signals.
• This function is useful for finding break points in wires without contact.

5.4. AC Voltage Detection (Live/Zero Wire Distinction)

• After powering on, press and hold the AC test button (component 5) to enter AC voltage measurement mode.
• When the probe contacts a conductor with AC voltage, the display screen will show the corresponding AC voltage.
• This function allows you to detect AC voltage and distinguish between live and zero wires based on the detected voltage.

Note on Induction Mode for Live/Zero Wires:

• If zero and live wires are very close, separate them as much as possible for detection.
• If separation is not possible, distinguish them by signal strength: the wire with a strong signal is the live wire, and the one with a weak signal is the zero wire.
• Due to high sensitivity, the induction mode may trigger even with weak electric field signals when the metal detector contacts an object directly.

5.5. Connected Wire Test (Continuity)

This function tests if a wire is connected (has continuity).

• After powering on, press the Conduction/Positive measurement Switch (component 6) with your right hand.
• Hold one end of the uncharged wire with your left hand.
• Contact the other end of the wire with the probe (component 1) of the test pen.
• If the wire is connected normally, the display will show "-C" and the buzzer will sound.
• If the wire is open (no continuity), the test pen will not respond.

5.6. Battery Polarity Detection

This function helps determine the positive and negative poles of a battery.

• After powering on, press and hold the Conduction/Positive measurement Switch (component 6) with your right hand.
• Hold the negative terminal of the battery with your left hand.
• Use the probe (component 1) of the test pen to touch the positive pole of the battery.
• If the polarity is correct, the display screen will show "-P" and the buzzer will sound.
• If it is connected reversely, the test pen will not respond.

5.7. Line Break Point Judgement

The inductive mode (NCV) can be used to locate break points in insulated wires.

• Move the probe along the insulated wire.
• The device will indicate the presence of AC voltage up to the break point.
• Where the signal stops or significantly weakens, a break point is likely present.

5.8. Screwdriver Function

The probe tip can be used as a screwdriver. The GD117 comes with interchangeable slotted and cross screwdriver bits.

6. Maintenance

6.1. Auto Power Off

The meter will automatically turn off after approximately 5 minutes of no operation and no induction signal detection to conserve battery life.

6.2. Low Battery Indication

When the battery voltage drops to less than 1.2 volts, the display will show a battery symbol. Please replace the batteries promptly when this symbol appears.

6.3. Cleaning

Clean the device with a wet cloth. Ensure the voltage detector is completely dry before using it again.

7. Specifications

8. User Tips

No specific user tips are available at this time. Always refer to the safety instructions and operating procedures for optimal use.

9. Troubleshooting

• No Indication/Sound Alarm but Voltage Suspected: Remember that even without an alarm, voltage may be present. Always verify with other methods if unsure and exercise extreme caution.
• Inaccurate Readings: Ensure proper insulation from the ground, especially when testing above 30V. Check battery level and replace if low. Ensure the product is used for AC city voltage as intended.
• Device Not Powering On: Check battery installation and ensure batteries are not depleted.
• Difficulty Distinguishing Live/Zero Wires in Induction Mode: If wires are too close, try to separate them. Otherwise, rely on the signal strength (stronger for live, weaker for zero).

10. Warranty and Support

For detailed warranty information and further support, please refer to the complete user manual available in PDF format. If the product is damaged or not working properly, please contact the seller or an authorized service center for repair.

You can download the full user manual here: GVDA GD117 User Manual (PDF)