Campbell Scientific OBS-5+ Sediment Concentration Monitor and Pressure Sensor - Manual (Page 38)

OBS-5+ System
corroded surfaces of the contact and track with a scouring pad and reassemble
unit.
Unit does not communicate with PC.
There are several possible causes for this symptom.
1) The batteries are dead.
2) The OBS-5+ will not wake up.
3) The test/umbilical cable is damaged or improperly connected
4) The OBS-5+ and PC are set to different baud rates or communication
protocols (for example, RS-232 versus RS-485).
• Click Plot and Port Settings and check port settings on the serial
port tab. The default baud rate is 115.2 kbps. If the PC is not set to
this speed, follow the steps in Section 6.2.4, Communication Settings,
to set it.
• If the OBS-5+ still fails to respond, try changing PC speeds and
clicking OBS Settings until communication is established (for
example, 57.6, 38.4, 19.6, 9.6 kbps, etc.). If this fails, switch the PC
back to 115.2 kbps and do the following steps.
• Reconnect the cable and click .
• Replace the batteries and click .
• If you have a survey cable, connect instrument to external power and
click .
• Remove the unit from the pressure housing and press and release the
RESET button. Click .
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