Proving Units

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  1. Socket & See SP400 Proving Unit



    93 % of 100
    • Intelligent voltage ramp for testing multimeters and voltage indicators
    • Generates from 50-690V with a true AC waveform output
    • Non-contact voltage indicator test feature
    • Powerful enough to light old filament style test lamps
    • Convenient for on site checks and best practice
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