Xylem HandyLab 780 - Manual (Page 70)

70
pH Oxy Cond
Data Logger
Interval and difference (combined)
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 fi rst DIFF
entry is automatically created when the data logger is started.
Limit value (combined)
When one of the two limit values (Min/Max) is exceeded, the data are logged
as defi ned by the “event interval“. Additionally, the last ten measured values
before an event are recorded (pre-trigger). As long as the measured value
remains within the limits, logging is performed at the preset “basic interval”.
1
2
3
4
A
Example: Logger type “Interval + Difference”
Delta
Delta
Delta
Interval
Time
Measured variable
= entry
Example: Logger type “Limit value”
Basic interval
Max limit
Min limit
Event interval
Pre-trigger 10 x
Measured variable
Time = entry