Data recorder including a recirculating non-volatile memory

摘要: A light weight data recorder employs a non-volatile electronic memory to store several channels of occurring before and after triggering event. Data may be retained in the with aid NiCad battery. Upon occurrence event, which user defined, input new into will terminated selectable predetermined time has passed. This allows recorded both specified The event derived by sensing change signal level one inputs amount, or it specially generated signal. Once occurred, is protected. Circuit means are provided retrieve stored without destroying it. Another circuit permits recording only unique been detected.