- -416. INSTRUMENT SIGNALS AND FAULTSThe following table lists all error indications and information displayed by the instrument andsupplied to the user in different operating situations:Display indication Explanation- - - - This appears if the sensor relevant to the indicated physical quantity isnot present or is faulty.OVFL Overflow appears when the probe detects a value that exceeds theexpected measurement range.UFL Underflow appears when the probe detects a lower value than theexpected measurement range.MEMORY FULL!! The instrument cannot store further data, the memory space is full.LOG It indicates that a logging session is running.