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Gossen Metrawatt M507A Metraline Z check VDE Tester Gossen Metrawatt M507A The Gossen Metrawatt Metraline Z check M507A loop resistance measuring instrument is part of the Metraline range which has the design philosophy of concentrating on measuring one parameter and doing it well This leads to simplicity of design and speed of use In this case the parameter is impedance including fault loop impedance with short circuit current fault loop impedance with short circuit current without tripp
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