An inexpensive programmable annotator, completely compatible with at least three models of widely used graphic recorders (Raytheon LSR-1811, Raytheon LSR-1807 M, and EDO 550) has been developed to automatically write event marks and print up to sixteen numbers on the paper record. Event mark and character printout intervals, character height and character position are all selectable with front panel switches. Operation is completely compatible with recorders running in either continuous or start-stop mode. ?? 1994.
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Build your own low-cost seismic/bathymetric recorder annotator