SOCKET WIRING SEQUENCE TEST: Insert the tester into a standard three-pin power socket. If a wiring sequence error is detected, the orange backlight will illuminate to indicate a wiring error. Refer to thedisplay to identify the specific type of wiring error. DATA RETENTION: After inserting into the socket, the data automatically locks after three seconds. Once locked, press the unlock button to release the data. LEAKAGE SWITCH DETECTION: Insert the tester into a three-pin socket, ensuring that the display indicates correct wiring. Press and hold the RCD button for more than 2 seconds. In this case, a functioning residual current device (RCD) should trip, displaying the ripping time. The button indicator willflash,indicating the completion of the tripping process. If it does not trip, it suggests a malfunction in the residual current device. AUTOMATIC SHUTDOWN: If there is no operation within 5 minutes of powering on, the instrument will automatically shut down. PRODUCT SAFETY AND RELIABILITY: Rated safety level CAT II 300V ensures safe usage and quality assurance. HIGH-DEFINITION BACKLIT LARGE SCREEN: The high-definition backlit display screen ensures clear visibility of measurement content even in dimenvironments, providing a clear and easily understandable view of the test results. WIDELY APPLICABLE SCENARIOS: Can be used to inspect the safety of socket wiring in homes, offices, shopping malls, and other places. Voltage range: AC 30-260V/45-65Hz,± (2.0%+2) Leakage voltage range: 0-99V/45-65Hz, ± (2.0%+2) Trip time test: 10-1000mS, ± (2.0%+4) RCD test: Greater than 30mA Voltage measurement (48V-250V/45-65Hz): Yes LCD display: Yes Backlight: Yes Socket connection detection: 1.10-1000mS, ± (2.0%+4) 2. Open ground 3. Open neutral 4. Open live 5. Live wire and ground wire reverse 6. Live wire and neutral wire reverse 7. Live wire and ground wire reverse, missi