Xylem DH-21 - Manual (Page 64)

4-18 Using the Graphical “W ATER LOG” Software
DH-21
This option is handy for saving memory space since data is not logged if the data does not change
more than the delta limit. You must decide how much change in level can happen before the
sensor logs the data. Note that this check is on the level parameter only, not the temperature, and
the value entered will be in the same units as set in the coefficients options. For example, if the
coefficient units are set to feet, the delta limit will be in feet also.
Figure 4-10. Delta Mode Option
4.4.3.3 Hyper Logging Mode Option
The Hyper Logging Mode shown in Figure 4-11 is used to log data at a regular time interval, like
the linear mode, but if the rate of change of the level reading is greater than a set rate, the logging
rate can be increased to a faster logging rate. In this mode all scanned data will be saved.
Logging Rate:
This is just like in the Linear Mode.