Gossen-Metrawatt-MINITEST-3P-MASTER-VDE-Tester-Gossen-Metrawatt-M712X-The-Gossen-Metrawatt-M712X-MINITEST-3P-MASTER-is-for-periodic-testing-or-testing-repaired-devices-with-CEE-plugs-to-DIN-VDE-0701-0702-The-following-measurements-are-made-ground-conductor-resistance-insulation-resistance-ground-conductor-current-differential-current-method-as-well-as-contact-current-direct-measurement-The-zero-potential-is-determined-by-measuring-the-current-All-measured-values-are-shown-on-the-LCD