Thông tin sản phẩm Hãng sản xuất: SEW - Đài Loan Model: 4120 ER Capable of measuring earth voltage. 2mA measuring current permits eath resistance to test without tripping earth leakage current breakers in the circuit. Test leads are supplied as standard accessories for simplified two-wire measuring system. Data hold function. Battery operated. Battery test indicator. IEC/EN 61010-1, IEC 61557-5 CAT III 300V. Calibration performed with supplied test leads.