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The 5725A Amplifier is a companion to the 5700A Calibrator. It extends the 5700A's workload coverage. It increases maximum direct and alternating current to 11 A for calibrating the high current ranges of popular low-cost and hand-held DMMs. It also extends the calibrator's alternating volt-hertz product to 1100V at 30kHz and 750V at 100kHz to cover the calibration requirements of high-accuracy bench and system meters.