This type of recorder is kept in pause mode, and only records if activated by an alarm.
a small, patient-activated device that records cardiac events over a period of days or weeks to evaluate symptoms such as palpitations or fainting spells. Captures data before and after the patient experiences these symptoms.
A portable monitor worn by a patient for an extended period that records the patient's ECG. The event recorder assists physicians in diagnosing events where individuals have unexplained symptoms, such as losing consciousness or becoming lightheaded. See larger view
is a type of recorder that is normally maintained in pause mode and starts recording only when activated by an alarm.
Train Event Recorders are similar to, but in Europe at least, pre-date the black boxes found on aircraft. They record data about the operation of train controls and performance in response to those controls and other train control systems. Data storage is provided by magnetic tape (now obsolete), battery-backed RAM and most recently nonvolatile EEPROM or "Flash Memory" overwritten in a FIFO continuous loop.