Appendix c. calculation of wld- and ref. datum – Xylem CHATTER Hardware Manual User Manual

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Appendix C. Calculation of WLD- and Ref. Datum

The following examples illustrate how you can calculate the water level datum
(WLD) in relation to the cable length and the reference datum of a bore.
Example: A bore has the following characteristics:

• Reference datum:

34.76 m (the level at which the Chatter

base rests on the pipe/bore head)

• Cable length:

25.0 m

• Sensor depth:

24.9 m (cable length - 10 cm)

• Measurement from DB:

7.65 m

Reference
datum

Water
level
datum

Connector=10cm

Sensor
depth

Cable length
on label

Figure 26. Lengths and Datum

Appendix C. Calculation of WLD- and Ref. Datum

Data Logger