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Campbell Scientific OBS-3A Turbidity and Temperature Monitoring System User Manual

Page 25

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OBS-3A Turbidity and Temperature Monitoring System

Barometric Correction

The OBS-3A measures absolute pressure so a correction must be made for
barometric pressure. Press the Run Correction button to run a barometric
pressure correction.

Be sure to do this while the OBS-3A is at the surface. Doing so
when the instrument is submerged will result in large errors in
the depth measurement.

NOTE

Change to RS-485

To switch from RS-232 communication to RS-485 communication, press the
RS-485 button and install the RS-485 converter.

Once the button is pressed, you will no longer be able to
communicate via RS-232. However, if you accidently push this
button, the OBS-3A can be reset by removing and reinserting the
batteries.

NOTE

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