Official Megger User Guide for the LTW300 series of 2-wire Earth Loop Testers. Models LTW315, LTW325, LTW325, LTW425 Version 05 (November 2008)
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Megger LTW300 Series Earth Loop Testers User Guide V05 1108 (Nov. 2008)
Covers LTW315, LTW325, LTW335 and LTW425 2-wire Loop Impedance Testers