Product Description 40mmφCT window and ultra compact size.Low cost and multi-function clamp tester.Data hold function and auto power off.Conform to IEC safety requirements. Withstanding Voltage AC 3700V 1 minute max. (Between the core of CT and outer case) Storage Temperature -10℃ to ～ 60℃ < 70%RH ( without condensation ) Accuracy (23℃±5℃ 80%RH or less) Operating Temperature 0℃ to ～ 40℃ < 80%RH ( without condensation ) Power supply SR-44(1.55V)×2 or LR-44×2 Power consumption 5mW Weight Approx. 100g Measuring Range AC Current:30A/300A (2 ranges auto)AC Voltage:3V～500V (4 ranges auto, 50/60Hz)DC Voltage:300mV～500V(5 ranges auto)Resistance:300Ω/3000Ω (2 ranges auto) AC Conversion Average sensing rms reading Safety standard IEC61010-1, IEC61010-2-032Installation CategoryⅡ 600V or CategoryⅢ 300V Jaw opening capability 40mmφ Limitation of circuit voltage Less than AC 500V Size 64(W)×193(H)×24(D)mm   Accessories Soft case:1Instruction manual:1Test lead:1Batteries LR-44(1.55V):2 Display 3.5 digit LCD max. reading of 3200 Over range indication "OL" mark on LCD Data hold indication "DH" mark on LCD Low battery indication "B" mark on LCD Auto power off Approx. 10 minutes later after the power on. E.M.C. standard EN 50081-1 and EN 50082-1 Measuring method Dual slope integration mode   AC Current (ACA) 0～300A:±2%rdg±8dgt AC Voltage(ACV) 0～500V:±2.3%rdg±6dgt DC Voltage (DCV) 0～500V:±1.3%rdg±3dgt Resistance (Ω) 0～3000Ω:±2%rdg±5dgt Sampling time 2 times/sec Battery life SR-44(200 hours), LR-44(100 hours)