1. Introduction
The ANENG AC28 Socket Tester is a compact and lightweight electrical safety inspection tool designed to quickly and accurately detect wiring faults in electrical outlets. It features an LCD display for voltage measurement and clear indicator lights to identify common wiring issues such as open ground, open neutral, live/neutral reverse, and missing ground. This tool also includes a leakage trip detection function (RCD/GFCI test) for enhanced safety. This specific model is equipped with an EU plug, suitable for 10A/16A convertible universal sockets.
It is an essential tool for households, electricians, and house inspectors to ensure the electrical safety of installations and prevent electric shocks.

2. Package Contents
- 1 x ANENG AC28 Socket Tester
3. Setup
The ANENG AC28 Socket Tester is designed for immediate use without complex setup. Simply plug the device into the electrical socket you wish to test.
3.1 Plug Type
This model is equipped with an EU plug. Ensure the socket you are testing is compatible with an EU plug. The device is designed for 10A/16A convertible universal sockets. If your socket is a 10A or 16A type, you may need to rotate the plug pins to fit correctly.


4. Operating Instructions
The ANENG AC28 provides quick and clear indications of socket wiring status and allows for leakage trip testing.
4.1 Function Panel Analysis

- Indicator Lights (N, PE, L): These lights illuminate to show the status of Neutral, Protective Earth, and Live wires.
- LCD Voltage Display: Shows the measured voltage of the socket.
- Leakage Test Button: Used to initiate the RCD/GFCI leakage trip test.
4.2 Socket Line Detection
Once plugged into a socket, the indicator lights on the tester will illuminate in various patterns to indicate the wiring condition. Refer to the comparison table below for interpretation.

| Condition | N (Neutral) | PE (Earth) | L (Live) | Description |
|---|---|---|---|---|
| Correct | β | β | β | All wires correctly connected. |
| Open Ground | β | β | β | Protective Earth wire is disconnected. |
| Open Neutral | β | β | β | Neutral wire is disconnected. |
| Live/Neutral Reverse | β | β | β | Live and Neutral wires are swapped. |
| Live/Ground Reverse | β | β | β | Live and Ground wires are swapped. |
| Missing Ground | β | β | β | Ground wire is missing or disconnected. |
Legend: β = Light ON, β = Light OFF
4.3 Leakage Trip Detection (RCD/GFCI Test)
To test the leakage protection system (RCD/GFCI) of the circuit:
- Plug the ANENG AC28 Socket Tester into the socket.
- Ensure the wiring is indicated as 'Correct' by the indicator lights.
- Press the 'LEAKAGE TEST' button.
If the RCD/GFCI protection is functioning correctly, the circuit breaker should trip, cutting off power to the socket. If there is no trip, it indicates a potential fault in the leakage protection system, and a professional should be contacted to inspect the wiring.

4.4 Voltage Measurement
The integrated LCD screen continuously displays the voltage of the socket when the tester is plugged in, providing real-time voltage readings.

5. Maintenance
- Keep the device clean and dry. Wipe with a soft, dry cloth.
- Avoid dropping the device or subjecting it to strong impacts.
- Store in a cool, dry place away from direct sunlight and extreme temperatures.
- No user-serviceable parts inside. Do not attempt to open or repair the device.
6. Troubleshooting
- No lights or display when plugged in: Ensure the socket has power. Try another known working socket. If still no response, the device may be faulty.
- Leakage test does not trip the circuit breaker: If the wiring is indicated as 'Correct' but the leakage test button does not trip the RCD/GFCI, this indicates a fault in the leakage protection system. Contact a qualified electrician immediately to inspect and repair the wiring.
- Incorrect wiring indication: If the tester indicates a wiring error (e.g., Open Ground, Live/Neutral Reverse), do not use the socket. Contact a qualified electrician to repair the wiring.
- Inconsistent readings: Ensure the tester is fully inserted into the socket. Avoid testing in environments with extreme humidity or temperature fluctuations.
Safety Warning: When testing leakage detection in public places, the test must be confirmed by a professional. When the socket wiring error is detected, please find a professional electrician to repair the wiring.
7. Specifications
| Feature | Detail |
|---|---|
| Product Name | Socket Polarity Tester |
| Model | AC28 |
| RCD Current | 30mA |
| Operating Voltage | AC110V/AC220V (Model specific, this version is EU plug) |
| Frequency | 50Hz/60Hz |
| Applicable Socket | 10A/16A Convertible Universal (EU Plug) |
| Display | LCD Voltage Measurement |
| Material | ABS |
| Dimensions | 56mm x 56mm (approx. 2.20 inches x 2.20 inches) |
| Weight | 35g |
| Target Audience | Household, Electricians, House Inspectors, etc. |


8. User Tips
- Portability: The ANENG AC28 is small and lightweight (35g), making it easy to carry for travel, maintenance, or inspections in various locations.
- Quick Checks: Use it for quick verification of socket wiring before plugging in sensitive electronics or in new installations.
- Regular Testing: Periodically test RCD/GFCI protected outlets to ensure they are functioning correctly and providing adequate safety.

9. Warranty and Support
The ANENG AC28 Socket Tester comes with a 12-month manufacturer's limited warranty for defective items, excluding items damaged or misused after receipt. Accessories included with the product are covered by a 3-month warranty.
For technical support or warranty claims, please contact your retailer or the manufacturer directly with your purchase details.





