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Testboy Digital Insulation Tester Testboy Testboy TV 430N P The Testboy TV 430 is a Digital Insulation Measuring Instrument that makes it possible to check the insulation resistance of devices electrical systems and circuits It has three selectable test voltages 250 500 and 1000V DC P P A continuity tester and an AC voltmeter have also been integrated to round off the options for use in a wide variety of applications The most important aspect when measuring insulation resistance is t
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