Hãng sản xuất: SEW- Đài Loan Model: 4234 ER Auto ranging microprocessor controlled. Earth testing at 2 Ohm, 20 Ohm, 200 Ohm, 2k Ohm. Earth voltage measuring : 0~300V AC. Automatic C spike check. Automatic P spike check. 2-Wire test. 3-Wire test. 4 ...