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Hãng sản xuất: SEW - Đài Loan
 Model: 4120 ER
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| 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. |