The Extech 380363 provides three test ranges for continuity and voltage measurements and acts as a datalogger for up to 9 data sets. 380363: Digital High Voltage Insulation Tester Autoranging insulation measurements to 10MOhm plus manual datalogging Features: 1000V, 500V, 250V test voltages Measure Insulation Resistance to 10GOhm Large LCD display with analog bargraph Lo Ohm function for testing connections Automatic discharge of capacitive voltage charges AC/DC voltage measurement up to 999V Manual data record and read function (9 sets) Live circuit display warning and beeper Specifications: General Insulation Resistance 4MΩ 40MΩ 400MΩ 4000MΩ 10GΩ Max Resolution 1kΩ Basic Accuracy ±3% Insulation Test Voltages 250V 500V 1000V AC Voltage Test Yes Low Resistance Test Yes Power source 6 x AA batteries Dimensions 9.3x4.6x2.1" (235x116x54mm) Weight 1.15lbs (520g) 380363 Extech Insulation Tester Megohmeter à¤Ã×èͧÇÑ´¤ÇÒÁà»ç¹©¹Ç¹