Campbell Scientific OBS-5+ Sediment Concentration Monitor and Pressure Sensor - Manual (Page 9)

OBS-5+ System
1. Introduction
The manual describes the features of the OBS-5+ ® , as well as its use for
surveys and battery-powered, internal-storage operations. Using backscatter
from a 780 nm laser diode and a patented dual-detection system (U.S. Patent
Number 5,796,481), a calibrated OBS-5+ measures suspended sediment
concentrations, suspended solids concentration (SSC), as large as 200 g L
–1 ,
which is about 10 times higher than standard OBS technology.
Before installing the OBS-5+, please study:
• Section 2, Cautionary Statements
• Section 3, Initial Inspection
2. Cautionary Statements
• Although the OBS-5+ is rugged, it should be handled as a precision
scientific instrument.
• Maximum depth for the OBS-5+ is limited by the installed pressure
sensor. If the maximum depths are exceeded, the pressure sensor will
rupture and the housing will flood. See Section 6.1, Instrument Setup, for
more information.
• Always orient the unit so that the OBS-5+ sensor “looks” into water clear
of reflective surfaces.
• Pad the end caps that contact metal with electrical tape, neoprene, or
expanded polyethylene tubes.
• Never mount the instrument by its end caps or attach anything to them.
This could a cause a leak.
• Always put the OBS-5+ in sleep mode when it will not be used for a while
to conserve battery capacity (see Section 6.2.13, Shutdown).
3. Initial Inspection
• Upon receipt of the OBS-5+, inspect the packaging and contents for
damage. File damage claims with the shipping company.
• Check this information against the shipping documents to ensure the
correct product is received (see Section 3.1, Ships With).
3.1 Ships With
21304 Accessory Kit
20919 Software Support CD
ResourceDVD
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