Campbell OBS500, Руководство оператора

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1
OBS500 Smart Turbidity Meter
with ClearSensor ® Technology
1. Introduction
The OBS500 submersible turbidity meter is designed for general pressure
measurements. The OBS500 uses ClearSensor ® (U.S. Patent No. 8,429,952),
an anti-fouling scheme that uses a shutter/wiper mechanism to protect and
clean the optics and a refillable biocide chamber to allow biocide to leach out
over the optics continually while in the closed position. It uses the SDI-12 or
RS-232 communication protocol to communicate with an SDI-12 or RS-232
recorder simplifying installation and programming. It can also be used as an
analog sensor with 0 to 5 V output.
This manual provides information only for CRBasic dataloggers.
It is also compatible with most of our retired Edlog dataloggers.
For Edlog datalogger support, see an older manual at
www.campbellsci.com/old-manuals or contact a Campbell
Scientific application engineer for assistance.
2. Precautions
•
READ AND UNDERSTAND the Safety section at the front of this
manual.
• The OBS500 needs to be sent in after two years or 70,000 cycles for drive
shaft seal replacement. (See m8! command in TABLE 7-7 .)
•
The sensor may be damaged if it is encased in ice.
• Damages caused by freezing conditions will not be covered by our
warranty.
•
Campbell Scientific recommends removing the sensor from the water for
the time period that the water is likely to freeze.
• Sand grains between moving surfaces can jam the shutter/wiper. For high
sediment load and large grain size installations, operate the OBS500
normally open to minimize the chance of sand grains jamming the
shutter/wiper, and orient the sensor vertically facing downstream (see
Section 7.7 , Operation in High Sediment Loads and Sandy Sediments
(p. 29)
).
•
Minimize temperature shock. For example, do not take sensor from sunny
dashboard and immediately drop it in frigid water.
• Ensure that obstructions are not in the backscatter sensor’s large field of
view. See Section 4 , QuickStart
(p. 2)
, for more information.
•
Maximum depth for the OBS500 is 100 meters.
NOTE