Campbell Scientific OBS-5+ Sediment Concentration Monitor and Pressure Sensor - Manual (Page 39)

OBS-5+ System
FIGURE 8-1. Internal components
OBS-5+ or pressure sensor malfunction.
• Open unit and inspect for: 1) broken sensor wires, and 2) loose pressure
sensor connector (FIGURE 8-1).
• Check sensor power by clicking Survey and selecting all sensors; the
green LEDs should illuminate. If they do not, the sensor power circuit
may not be working.
• If the depth sensor reads high and does not change, it may need to be
cleaned (see Section 9.2, Pressure Sensor).
• If the sensors appear to be in working order, the digitizer or
microcontroller may be damaged. Such problems require factory service.
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