Xylem CHATTER Hardware Manual - Manual (Page 44)

The water level datum (WLD) in this example: 34.76 - 24.9 + 7.65 => 17.51 m
The following figures/numbers for the bore are required as entries to the data
base to achieve a valid calculation of the water level datum.
Sensor depth from top of bore
1. Sensor depth from the top of the bore = total cable length – 10cm.
2. “Total cable length” is printed on a label near the cable connector
(example: cable length = 11.86 m).
3. To get the sensor depth in relation to the top of the bore, you must sub-
tract 10 cm due to the cable connector length (11.86 - 0.1 = 11.76 m).
4. This is also the sensor depth that you use in calculations and write into the
Chatter database (written to the server from the Chatter Link ”Modbus”
tab in the field ”Sensor depth”).
Data Logger
44 GB Chatter Hardware Manual 100416