Digital Socket Tester 30mA RCD GFCI NCV EU US UK Large Display Smart Outlet Checker Voltage Detector Plug Ground Zero Line Tool

Is Smart Device : nois_customized : YesModel Number : ST05B/D/EBrand Name : MESTEK : Mainland ChinaCertification : CE,RoHS,nonedropshipping : supportZero-live line voltage: : 30-250VZero-earth line voltage: : 0.1-10VFrequency: : 50-60HZGFCI/RCD tripping currrent: : over 30mAWorking temperature: : 0-40 degreePower: : 2*AAA batteryRCD test: : Support6 wire status display: : SupportName: : socket testerUsage: : voltage testerEU UK US plug: : outlet checkerItem 2: : socket detectorDigital Socket Tester Outlet Tester 30mA RCD GFCI NCV EU US UK Large Display Smart Outlet Checker Voltage Detector Plug Ground Zero Line Tool-The polarity detection of the three hole power socket wiring-The protection function detection of the leakage switch-It can quickly and accurately detect the wiringWidely usedfire protection/laboratory/factory/familyVoltage measurement1. The normal voltage range of zero fire line is plus or minus 10% of the local standard voltage. If it is too high or too low, it may be because the circuit load is too high or the power supply is too low/ too high.2. The normal voltage of zero-earth wire is less than 2V, if too high maybe it is because there is current leakage, or the three phase-sequence is out of balance or there is signal interference in the circuit.RCD TESTPlease turn off all electrical appliances before using this function,and do so with permission to ensure that the power outage will not cause any harmVA color display screenThe high-definition display can see the screen value clearly in the dark environment