Contact closure data logger
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United States of America Patent
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Apr 22, 1997
Grant Date -
N/A
app pub date -
Jan 6, 1995
filing date -
Jan 6, 1995
priority date (Note) -
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Abstract
A contact closure data logger which monitors state changes in a main switch, and records the time at which the state changes occur. To conserve power and accommodate less capable microprocessors, monitoring is done on a discreet basis. Various types of switches can be used, such as reed switches, FETs and mechanical switches, making the logger particularly useful for energy usage monitoring studies and retrofit of tipping bucket rain gauges. Dependent switches and measurement devices can be arranged in a hierarchical fashion to be monitored and otherwise acted upon when state changes occur in the main switch.
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