SOCKET TESTER ( HTC – SE-09 )

Description

The HTC SE‑09 Professional Socket Tester is a compact, user-friendly device designed for quick, accurate diagnostics of three‑pin AC wall outlets. Ideal for electricians, maintenance technicians, home inspectors, and facility auditors, it combines line sequence detection, phase and leakage voltage measurement, and RCD/GFCI trip‑time testing in one handheld unit—delivering clear insights in under five seconds.

At its core, the SE‑09 is engineered to analyze standard three-hole AC sockets operating within 30–260 V AC at 45–65 Hz, with a rated phase‑voltage accuracy of ±(3.0% + 2). Leakage voltage (neutral‑earth potential) is measured up to 99 V, with accuracy of ±(2.0% + 2)—helping identify wiring faults like reverse neutral, missing ground, or neutral-to-earth bridges.

The device’s LCD screen quickly displays voltage readings numerically and includes intelligent data‑hold functionality: after about three seconds of insertion into the outlet, the reading freezes automatically; pressing the unlock button returns the tester to detection mode. The screen also shows error codes and trip-time values for RCD interruption tests.

A key feature is the three‑hole socket line sequence detection: correct wiring is confirmed when all live-neutral-ground connections are properly oriented. If a mis-wire is detected—such as live/ground reverse, missing earth, or swapped live/neutral—the backlight flashes orange and the display shows the corresponding error code. Users are guided to seek professional correction for faulty connections.

For safety device testing, the SE‑09 performs RCD/GFCI trip checks (>30 mA). By pressing and holding the test button for over two seconds, the built-in trip circuit triggers, and the tester displays the trip-time in milliseconds, typically between 20–1000 ms with ±(2.0% + 4) accuracy. If the trip delay exceeds safety thresholds (e.g., over 25 ms for GFCIs or over 100 ms for RCDs), the display turns orange and shows “Err”—signaling the device has failed compliance.

The SE‑09 is lightweight and ergonomic, measuring approximately 67 × 65 × 61 mm and weighing 85 g, making it trivially portable in toolkits or shirt pockets. It operates on two AAA batteries (1.5 V) and features an automatic shutdown after ~5 minutes of inactivity to preserve battery life. A professional-grade casing protects the unit under daily inspection conditions.

Operating temperature ranges from 0 °C to 40 °C with relative humidity up to 75%. Storage conditions are rated between –10 °C and +50 °C, with up to 80% RH. The device is specified for altitudes up to ≤2000 m.

Technical highlights include:

• Voltage range: 30–260 V AC at 45–65 Hz | Accuracy: ±(3.0% + 2)

• Leakage (Neutral‑Earth) Voltage: 0–99 V | Accuracy: ±(2.0% + 2)

• RCD/GFCI Trip‑Time Test: 20–1000 ms range | Accuracy: ±(2.0% + 4)

• Automatic Shutdown: ~5 minutes of inactivity

• Data‑Hold: Automatic freeze after insertion; manual unlock controls

• Error detection: Live/Ground reverse, missing earth, Live/Neutral reverse, wiring faults indicated via backlight and code display

• Power: 2 × AAA batteries; lightweight (85 g); compact casing

• Operating conditions: 0–40 °C, ≤75% RH | Storage: –10–50 °C, ≤80% RH | Altitude ≤2000 m

Practical Applications & Value

The HTC SE‑09 streamlines professional outlet checks and wiring validation:

• Verifies correct socket wiring before repair or usage

• Measures phase voltage to ensure consistent power supply (neutral to live)

• Detects leakage voltage from earth, indicating grounding issues or stray wiring

• Confirms RCD/GFCI operation with trip-time display to ensure safety compliance

• Highlights wiring errors immediately upon insertion, prompting corrective action

• Suitable for field technicians performing routine compliance checks or pre-use inspections in both commercial and residential settings

In summary, the HTC SE‑09 Professional Socket Tester offers a complete, efficient solution for outlet diagnostics by combining socket sequence detection, voltage measurements, leakage checks, and RCD/GFCI testing in a compact, easy-to-use device. Its automatic data-hold, error indication, and robust safety mechanisms make it a must-have tool for electrical professionals focused on safety and compliance.