Megger manufactures extended range insulation resistance testers, 210170 and 210600. The product is an ideal instrument that helps when high ranges are needed for measuring insulation resistance. The product offer excellent test voltage regulation and an external guard terminal to eliminate surface leakage current from the measurement. The instruments are all electronic and they generate a regulated dc high voltage and use low-zero-drift, high-accuracy circuits, with high current sensitivity. The product is designed for portability and is enclosed in a molded, impact-resistance, flame-retardant case. The salient features of the extended range insulation resistance testers:
