Ampe kìm đo điện trở đất Kyoritsu 4200 Function Range Resolution Measuring range Accuracy Earth resistance Auto range 20Ω 0.01Ω* 0.00~20.99Ω | ±1.5%±0.05Ω 200Ω 0.1Ω 16.0~99.9Ω | ±2%±0.5Ω 100.0~209.9Ω | ±3%±2Ω 1200Ω 1Ω 160~399Ω | ±5%±5Ω 400~599Ω | ±10%±10Ω 10Ω 600~1260Ω --- AC current (50Hz / 60Hz) Auto range 100mA 0.1mA 0.0~104.9mA | ±2%±0.7mA 1000mA 1mA 80~1049mA | ±2% 10A 0.01A 0.80~10.49A 30A 0.1A 8.0~31.5A Operating system Earth resistance function : Constant voltage injection, Current detection, (Frequency : Approx.2400Hz) Dual Integration AC current function : Successive Approximation Over-range indication "OL" is displayed when input exceeds the upper limit of a measuring range Response time Approx.7 seconds (Earth resistance) Approx.2 seconds (AC current) Sample rate Approx. 1 times per second Power source DC6V : R6P (sizeAA manganese battery) × 4pcs, or LR6 (sizeAA alkaline battery) × 4pcs Current consumption Approx. 50mA (max. 100mA) Measurement time Approx. 12 hours (when R6P is used) Approx. 24 hours (when LR6 is used) Auto power-off Turns power off about 10 minutes after the last button operation. Applicable standards IEC 61010-1 : 2001 (CAT.IV 300V Pollution degree2) Withstand voltage AC5320Vrms / 5 seconds Between the Transformer jaws fitted parts and Case enclosure (except for jaws) Conductor size Approx. 32mm max. Dimension 246(L) × 120(W) × 54(D)mm Weight Approx. 780g (including batteries) Accessories Battery R6P : 4pcs Instruction manual : 1pc 8304 (Resister for operation check : 1pc) 9128 (Hard case : 1pc)