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The SEW 1620 ER is a microprocessor-controlled digital 3-wire earth resistance tester designed to measure ground resistance and earth voltage safely without tripping active circuit breakers. [1, 2]
Key Specifications & Features
Resistance Ranges: Measures across three ranges: 40 Ω, 400 Ω, and \(4\,\mathrm{k}\Omega\).
Testing Current: Uses a low 2mA measuring current to test earth resistance without tripping leakage current breakers in the tested circuit.
Display & Functions: Features a 33⁄4 digit (4000 counts) LCD screen with a backlight, data hold, and relative measurement capabilities.
Power Supply: Powered by 8 pieces of 1.5V (AA) batteries with built-in low battery indication and auto power-off. [1, 2]