VICTOR 4109 VC4109 equal potential bonding resistance tester L Apply to measure equal potential bonding resistance of buildings'metal and resistance between electrical device and earth mat 'pole. And measure measure resistance of switch or socket, as well as low resistance
L Measure range: 0.020 -1999, resolution: 0.001, precision: 2%
L Interference voltage (UST) range: 0-50V (AC 45-400HZ), precision: 5% L Adopt DC voltage energize and change pole to measure automatically (4pole or 2pole) L Maximal open circuit voltage 20V, short circuit current L can dislodge surplus resistance of measuring wire L can store 100 (Group) measured data L Employ instrument panel calibration technology