1. Introducere
This manual provides detailed instructions for the safe and effective use of your NJTY Non-Contact Voltage Tester, Model T-03A. This device is designed for non-contact detection of AC voltage, offering a safe method for identifying live wires, checking for circuit breaks, and performing general electrical troubleshooting.

Image 1: NJTY Non-Contact Voltage Tester, Model T-03A. This image shows the overall design of the voltage tester, highlighting its compact and pen-like form factor with a red and black casing, green and red buttons, and an integrated LED flashlight at the tip.
2. Informații de siguranță
Always adhere to local safety regulations and practices when working with electricity. This device is designed to enhance safety, but it does not replace proper electrical safety procedures. Failure to follow these instructions may result in electric shock, injury, or death.
- Nu utilizați testerul dacă pare deteriorat sau nu funcționează corect.
- Verify the tester's functionality on a known live circuit before and after each use.
- Always wear appropriate personal protective equipment (PPE), such as insulated gloves and safety glasses.
- Nu depășiți volumul specificattage range (12V-1000V AC or 48V-1000V AC).
- Keep fingers behind the finger guard during operation.
- Avoid direct contact with live conductors. This is a non-contact device.
- Do not use the device in wet conditions or in explosive atmospheres.
- The integrated laser pointer should not be aimed directly at eyes or reflective surfaces.
3. Produs terminatview
Familiarizează-te cu componentele volumului tăutage tester:

Image 2: Diagram illustrating the key components of the NJTY Voltage Tester. Labels include the NCV sensor head (probe), laser pointer, flashlight, signal/indicator lights, high/low signal indicator, power button, sensitivity switch (H/L), lighting/laser switch, and battery cover.
- Probe (NCV Sensor Head): Detectează AC voltage fără contact.
- Indicator laser: Emits a red laser for targeting test points.
- Lanternă: Oferă iluminare în condiții de lumină slabă.
- Signal / Indicator: Indicație vizuală a volumuluitage detectare.
- High/Low Signal Indicator: Displays the detected voltagnivelul.
- Buton de alimentare: Pornește și oprește dispozitivul.
- Sensitivity Switch (H/L): Comută între modurile de sensibilitate ridicată și scăzută.
- Lighting / Laser Switch: Activates the flashlight or laser pointer.
- Capacul bateriei: Punct de acces pentru înlocuirea bateriei.
4. Configurare
4.1 Instalarea bateriei
Volumul NJTYtage Tester requires two AAA batteries (included). To install or replace batteries:
- Unscrew the battery cover at the bottom of the tester (refer to Image 2, item 9).
- Introduceți două baterii AAA de 1.5 V, asigurându-vă că polaritatea este corectă (+/-).
- Puneți la loc capacul bateriei și înșurubați-l bine.

Imaginea 3: Prim-plan view of the battery cover at the base of the NJTY Voltage Tester, showing how it can be unscrewed for battery access.
5. Instrucțiuni de utilizare
5.1 Pornire/Oprire
- Pentru a porni, apăsați și mențineți apăsat butonul Buton de alimentare (refer to Image 2, item 6) until the indicator lights illuminate.
- Pentru a opri, țineți apăsat butonul Buton de alimentare again. The device will also automatically shut down after five minutes of inactivity to conserve battery life.
5.2 Sensitivity Modes
The tester features two sensitivity modes for different applications:
- High Sensitivity Mode (12V-1000V AC): Suitable for detecting lower voltages or for general detection. Press the Sensitivity Switch (H/L) (refer to Image 2, item 7) to select this mode.
- Low Sensitivity Mode (48V-1000V AC): Ideal for detecting higher voltages or when precise localization is needed to avoid false positives from adjacent wires. Press the Sensitivity Switch (H/L) pentru a selecta acest mod.

Image 4: Comparison of high and low sensitivity modes. The top row shows high sensitivity (12-1000V) detecting live wire and null wire. The bottom row shows low sensitivity (48-1000V) detecting live wire and null wire, demonstrating how the tester indicates voltage presence with visual and audible alerts.
5.3 fără contact voltage (NCV) Detectie
Pentru a detecta volumul de curent alternativtage:
- Turn on the tester and select the desired sensitivity mode.
- Așezați Probe (NCV Sensor Head) near the conductor, outlet, or device you wish to test.
- Dacă AC voltage is detected, the tester will emit an audible alarm and the Signal / Indicator lights will illuminate, with the High/Low Signal Indicator showing the relative strength of the detected field.

Image 5: The voltage tester in use, demonstrating NCV detection on an electrical outlet and a wire. It also shows the buzzer alarm, flashlight illuminating a circuit box, and the laser pointer targeting a ceiling light.
5.4 Breakpoint Testing
This feature helps locate breaks in live wires:
- Ensure the wire is live and the tester is in an appropriate sensitivity mode.
- Mutați Probe (NCV Sensor Head) along the length of the wire.
- Testerul va indica volumultage up to the point of the break. The absence of a signal beyond a certain point indicates a break in the circuit.

Image 6: Illustration of breakpoint testing. The tester indicates voltage on one side of a broken wire, and no voltage on the other side, pinpointing the location of the break.
5.5 Lanterna
To activate the integrated LED flashlight for illuminating dark work areas:
- Apăsați tasta Lighting / Laser Switch (refer to Image 2, item 8) once.
- Press it again to turn off the flashlight.

Image 7: The integrated LED flashlight of the voltage tester illuminating a dark electrical panel, demonstrating its utility in low-light environments.
5.6 Pointer laser
To activate the laser pointer for precise targeting:
- Țineți apăsat butonul Lighting / Laser Switch (refer to Image 2, item 8) for a few seconds.
- Release the button to turn off the laser pointer.
- Atenţie: Do not stare into the laser beam or point it at people or animals.

Image 8: A hand holding the voltage tester, using its red laser pointer to indicate a specific button on an electrical control panel, highlighting its precision targeting capability.
6. Întreținere
- curatenie: Ștergeți dispozitivul cu o lavetă uscată și moale. Nu utilizați substanțe de curățare abrazive sau solvenți.
- Depozitare: Store the tester in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries to prevent leakage.
- Înlocuire baterie: Înlocuiți bateriile imediat ce apare indicatorul de baterie descărcată pentru a asigura citiri precise.
7. Depanare
| Problemă | Cauza posibila | Soluţie |
|---|---|---|
| Testerul nu pornește. | Baterii descărcate sau instalate incorect. | Verificați polaritatea bateriilor; înlocuiți bateriile. |
| No detection on a known live circuit. | Low battery, incorrect sensitivity mode, or device malfunction. | Replace batteries, switch to high sensitivity mode (12V-1000V), or contact customer support. |
| Fals pozitive (detectează vol.tage where none exists). | High sensitivity mode in a noisy electrical environment. | Switch to low sensitivity mode (48V-1000V). |
8. Specificații
| Caracteristică | Detaliu |
|---|---|
| Model | T-03A |
| Marca | NJTY |
| AC Voltage Gama | 12V-1000V (High Sensitivity), 48V-1000V (Low Sensitivity) |
| Frecvenţă | 50/60Hz |
| Sursa de alimentare | 2 baterii AAA de 1.5 V |
| Oprire automată | După 5 de minute de inactivitate |
| Indicatori | Audible alarm, LED indicator lights |
| Caracteristici suplimentare | Integrated LED flashlight, Laser pointer, Breakpoint testing |
| Dimensiunile produsului | 0.1 x 0.1 x 0.1 inci |
| Greutatea articolului | 1.8 uncii |
9. Ce se află în cutie
- 1 x NJTY Voltage Tester Pen
- 2 baterii AAA de 1.5 V
- 1 x English Manual (This document)
10. Garanție și asistență
NJTY provides comprehensive after-sales support for sixty months from the date of purchase. If you encounter any issues with your NJTY Non-Contact Voltage Tester, Model T-03A, please contact our customer service team for assistance. Please refer to your purchase documentation for specific contact details.