To acquire and record the variation of a value such as a pressure as a function of a parameter such as time in a sonde (10) lowered into a well (12), pressure measurements are made at equal time intervals, these measurements are digitized and entered in a nonvolatile memory selectively so as to maximize...http://www.google.fr/patents/US4715002?utm_source=gb-gplus-shareBrevet US4715002 - System for recording a variable value, notably in a well, and for compressing stored measurement interval data
System for recording a variable value, notably in a well, and for ...
