Xylem SI Analytics HandyLab 750 Mode D'emploi page 48

Data Logger
Difference (DIFF)
When the delta range (process variable and/or temperature) related to the
last entry is exceeded, a new entry is created and the delta range is displaced
upwards or downwards by the delta value. The first entry is automatically
created when the data logger is started.
pH
Delta
Delta
= entry
Difference + Interval combined (DIFF+INT)
When the delta range related to the last DIFF entry is exceeded, a new entry
is created (example: entry A) and the delta range is displaced upwards or
downwards by the delta value. As long as the measured value remains within
the delta range, logging is performed at the preset interval. The first DIFF
entry is automatically created when the data logger is started.
pH
Delta
Delta
Delta
= entry
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Example: First entry = 7, Delta = 1
Delta
Example: Logger type "DIFF+INT"
A
Delta
Interval
Time
Time