เครื่องวัดความต้านทานดิน UNI-T UT522 ราคาสุดคุ้ม ขายดีสุด SpecificationsRangeAccuracyModelUT522Earth Resistance(Ω)0~40Ω±(2%+20)0~400Ω±(2%+3)0~4000Ω±(2%+3)AC Earth Voltage (V)0~400V±(1%+6)Frequency:50Hz/60Hz√FeaturesDisplay Count4000Manual Range√Auto Power OffAbout 10 minutes√Low Battery Indication√Data Hold√Data Storage20 groupsLCD Backlight√Full Icon Display√Double Insulation Protection√Contact Badness IndicationPort C or Port E don`t contact display”---Ω”√Over-Range DisplayDisplay OL√Simple 2-Wires Testing√Precision 3-Wires Testing√General CharacteristicsPower1.5V batteries(5#)X 6LCD尺寸70.6mm X 34mmProduct colorRed and greyProduct Net Weight560gProduct Size160mm X 100mm X 70.5mm Standard AccessoriesBatteries, carrying bag, test lead, simple test lead, test probe