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Appendix C. 4 to 20 mA Operation

C.1 Setting Operating Parameters using DIP

Switches

The following 4 to 20 mA operating parameters can be set with DIP switches.

DIP switches 1, 2, and 3 are reserved for the SDI-12 interface.

Setting measurement type to level or depth

• Level Measurement – Set DIP Switch 4 to the OFF position.

• Depth Measurement – Set DIP Switch 4 to the ON position.

Scaling the measurement

With DIPS 5 and 6 you can scale the available measuring range to a smaller

range. Where the whole measuring range is not required, this has the

advantage of increasing the resolution.

• 50 ft (not scaled) – DIPS 5 and 6 to the ON position.

• 25 ft – DIP 5 to the OFF position, DIP 6 to the ON position.

• 12 ft – DIP 5 to the ON position, DIP 6 to the OFF position.

• 6 ft – DIPS 5 and 6 to the OFF position.

Setting the measurement system

Use DIP 7 to set the engineering units of the measurement.

• Metric – DIP 7 to OFF.

• Imperial – DIP 7 to ON.

Setting measurement type

Use DIP 8 to set water level or pressure units.

• Water Level – DIP 8 to OFF.

• Pressure – DIP 8 to ON.

C-2

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Campbell-scientific CS470/CS471 Compact Bubbler System Manuale Utente Pagina 36