Rechargeable battery powered 4-terminal tester with selectable test frequencies, greater measurement sensitivity and attached rod technique and stakeless measurement capability 4-Terminal Earth/Ground Resistance Testers and Soil Resistivity Testers DET4TCR2 Features: Resistance range 0.01 to 20k ohms auto ranging Choice of 2, 3 or 4 terminal measurements Simple one button operation Superior noise rejection to 40V pk-pk Measures earth voltage 0 – 100V Automatic P spike and C spike check User selectable test frequency No-disconnect testing using ICLAMP Stakeless testing using ICLAMP and VCLAMP Earth current range using ICLAMP Specifications: Resistance range 0.01 to 20kΩ Accuracy 2% ± 3 digits Ingress protection IP54 Output ±25V or ±50V Test frequency Hz 94,105,111 or 128 Earth current range with ICLAMP 0.5mA to 19.9A Display LCD with back light Operating temp -15 to +55 °C DET4TCR2 Earth Ground Tester Megger à¤Ã×èͧÇÑ´¤ÇÒÁµéÒ¹·Ò¹´Ô¹