Xylem DH-21 - Manual (Page 27)

DH-21
Using the “W ATER LOG” Software 3-9
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
coefficients units are set to feet, the Delta Limit will be in feet also.
The WaterLOG Serial # T2000 Version 1.1
Status = RESET (LINEAR) Last Measurement Units
Date/Time = 02/28/95 03:51:32
Date Started = 01/01/95 14:39:00 PRESSURE = 0.0000 PSI
Logging Rate = 00:01:00 TEMPERATURE = 0.00 Deg C
Next Log Time = 00:00:00
Memory Used = 0.0 %
Logging Count = 0 Scans
Battery = 6.8 Volts
1) Run 4) Time/Date 7) User Notes 10) Measure Data
2) Off 5) Logging Mode 8) Extract Data 11) Zero Sensor
3) Reset 6) Coefficients 9) View Data 12) Sensor Info
13) Diagnostics
Enter Option: 5 Esc-Exit
Delta Mode
1) Logging Rate = 00:01:00
2) Delta Limit = 1.000000
3) Save/Exit
Enter Option: 2 Esc-Exit
Figure 3-6. Delta Mode Option
3.2.3.3 Hyper Logging Mode Option
The Hyper Logging Mode shown in Figure 3-7 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: Set between 1 second to 24 hours. This is just like in the Linear Mode.
Hyper Limit: The Hyper Limit will be expressed in the unit of measure specified under the
conversion options with inches, feet, meters, PSI, etc., being common units for
this field. As long as the difference between the current scanned level and the last
logged level is less than this set hyper limit, the scan rate will stay at the regular
rate. If the difference is greater than the set hyper limit, the scan rate will jump to
a faster preset scan rate.