A non-contact voltage tester is an electrical measuring instrument that helps to protect the lives of workers involved in electrical work.

However, using it incorrectly can pose a risk of electric shock and is very dangerous.

To prevent electric shock accidents, it is necessary to perform a functionality check before use.

Please use a known power source (such as an electrical outlet) or a voltage checker to verify proper operation.

When conducting actual voltage testing, bring the sensing part close to the object or electrical outlet being measured for AC voltage.

When the non-contact voltage tester detects an AC voltage signal, it will light up or play a sound to indicate the detection.

Align the sensing part so it is parallel to the object being measured, as shown in the diagram.

When conducting a non-contact voltage test on insulated wires, make sure to firmly place the sensing part

directly on the wire to ensure optimal sensitivity and avoid the risk of non-detection.

Furthermore, if your hands or the voltage tester are wet, there is a risk of electric shock,

so please refrain from using them.

You can easily adjust the sensitivity of the AD-5571, by using the buttons to switch between "High Voltage Induction Mode: 90-1000V" and "Low Voltage Response Mode: 24-1000V".

It is recommended that you use "High Voltage Induction Mode" if you know that the voltage of the measured object exceeds 90V, as setting too high a sensitivity may cause the tester to react to other nearby live wires.

It is important to use a voltage tester that is suitable for the voltage and of AC/DC type, and to take precautions before use such as performing visual checks and checking the battery level.

Please read the instruction manual carefully before using the voltage tester.