{'fraction_non_alphanumeric': 0.020080321285140562, 'fraction_numerical': 0.0, 'mean_word_length': 4.889763779527559, '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}}
THE USE OF ON / OFF FEED CONTROL FOR PAN BOILING

Feed control of pans can be achieved using actuated on/off valves in place of conventional control valves. This is achieved without a noticeable degradation in control performance by the use of time proportional on/off actuation (pulse width modulation). This type of control offers cost savings, particularly for continuous pans with multiple loops. The requirements and techniques for implementing this type of control are discussed. The selection of an appropriate length of on/off cycle is discussed, supported by calculations based on measured plant dynamics to quantify the extent to which oscillations are damped by the process. The specific advantages of on/off feed control are discussed.