Campbell OBS-3A Manual Pagina 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
17
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