{'fraction_non_alphanumeric': 0.02830188679245283, 'fraction_numerical': 0.018867924528301886, 'mean_word_length': 5.103448275862069, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A new calibration system for small AC voltages at power frequencies

A new current-comparator-based dual-channel calibration system for AC voltages in the millivolt range for operation at power frequencies has been developed. The range of generated voltages is 1 mV - 100 mV. The calibration system in-phase and quadrature expanded measurement uncertainties (k=2) are estimated to be within 25·106. The traceability to SI units is established through the calibration of standard resistor, capacitor, and current comparator ratios.