Patent ID: 6198403
Filing Date: 2001-03-06
Classification: G01R

Abstract:
A voltage-monitoring instrument with expanded capabilities for quality control evaluation of AC power line voltage, comprising:input coupling means for supplying an AC signal-under-test that replicates the AC power line voltage at reduced level while providing isolation between the power line and the instrument for purposes of safety;an precision half-wave detector, receiving as input the AC signal-under-test, made and arranged to provide as output a precise half wave rectified signal for deriving therefrom an ongoing measurement of RMS value of the amplitude of the AC power line voltage;a peak detector, receiving as input the AC signal-under-test, made and arranged to provide as output a peak-detected signal representing a peak value of the AC power line voltage; anda display system, including associated user controls, processing circuitry, display device and associated display drive circuitry, made and arranged to provide continuously variable ongoing visual indications representing real-time amplitude of the RMS and peak values of the power line voltage, displayed simultaneously.