Campbell Scientific CSAT3B CSAT3B Three-Dimensional Sonic Anemometer - Page 41

Communications - csat3 sonic anemometer

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CSAT3B Three-Dimensional Sonic Anemometer The appropriate port and cable type to be used are determined by the chosen communication method. TABLE 7-2 shows some of the criteria to use when determining the best communication method for a given application. Once a suitable method is determined, the appropriate combination of cables, connectors, and lengths should be used (see Section 5.2.3.1, Power and Communications Cables, for information about ordering cables). If the CSAT3B is going to be operated using SDM or CPI communications where the datalogger triggers the measurement and the data are unfiltered (see Mode 1 in Section 8.2, Operating Modes), then the CSAT3B default settings are appropriate and do not require modification. If, however, the CSAT3B will be operated in another mode that either requires data filters or uses USB or RS485 communications, the settings must be modifying as described in Section 7.1, Settings. NOTE Unlike previous CSAT3 models, the CSAT3B does not include 7.6 m (25 ft) lengths of all cable types. Only the 5 m (16 ft) USB cable for initial configuration of the sensor is included. Other cables must be ordered separately. TABLE 7-2. Summary of Communications Options for the CSAT3B Data collection Cable length Required cables Robustness Bandwidth Synchronization with other sensors Noisy environments SDM USB CPI Dataloggers: • CR800 PC • CR1000 • CR3000 Dataloggers: • CR6 • CR8001 • CR10001 • CR30001 Medium Short, < 5 m Longest CSAT3BCBL1 CSAT3BCBL2 and USB cable (included) CSAT3BCBL2 and CSAT3BCBL3 Better Worse Best OK Best Best RS-485 PC Long CSAT3BCBL2 and CSAT3BCBL3 Better OK Best Worse Best Worse OK OK Best 1 Requires using the SC-CPI Interface Better 7.7 Communications There are many possible configurations of multiple CSAT3Bs and other sensors on a single measurement station or system. Accordingly, power requirements and sensor cable lengths should be taken into account to appropriately power all sensors and avoid excess attenuation of signals. The following sections describe different types of communications and different configurations that may be helpful when designing the layout and configuration of a system. For additional help, contact a Campbell Scientific application engineer. 31

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CSAT3B Three-Dimensional Sonic Anemometer
The appropriate port and cable type to be used are determined by the chosen
communication method.
TABLE 7-2 shows some of the criteria to use when
determining the best communication method for a given application.
Once a
suitable method is determined, the appropriate combination of cables,
connectors, and lengths should be used (see Section 5.2.3.1,
Power and
Communications Cables
, for information about ordering cables).
If the CSAT3B is going to be operated using SDM or CPI communications
where the datalogger triggers the measurement and the data are unfiltered (see
Mode 1 in Section 8.2,
Operating Modes
), then the CSAT3B default settings
are appropriate and do not require modification.
If, however, the CSAT3B will
be operated in another mode that either requires data filters or uses USB or RS-
485 communications, the settings must be modifying as described in Section
7.1,
Settings
.
Unlike previous CSAT3 models, the CSAT3B does not include
7.6 m (25 ft) lengths of all cable types.
Only the 5 m (16 ft) USB
cable for initial configuration of the sensor is included.
Other
cables must be ordered separately.
TABLE 7-2.
Summary of Communications Options for the CSAT3B
SDM
USB
CPI
RS-485
Data collection
Dataloggers:
•
CR800
•
CR1000
•
CR3000
PC
Dataloggers:
•
CR6
•
CR800
1
•
CR1000
1
•
CR3000
1
PC
Cable length
Medium
Short, < 5 m
Longest
Long
Required cables
CSAT3BCBL1
CSAT3BCBL2 and
USB cable (included)
CSAT3BCBL2 and
CSAT3BCBL3
CSAT3BCBL2 and
CSAT3BCBL3
Robustness
Better
Worse
Best
Better
Bandwidth
OK
Best
Best
OK
Synchronization with
other sensors
Best
Worse
Best
Worse
Noisy environments
OK
OK
Best
Better
1
Requires using the SC-CPI Interface
7.7
Communications
There are many possible configurations of multiple CSAT3Bs and other
sensors on a single measurement station or system.
Accordingly, power
requirements and sensor cable lengths should be taken into account to
appropriately power all sensors and avoid excess attenuation of signals.
The
following sections describe different types of communications and different
configurations that may be helpful when designing the layout and
configuration of a system.
For additional help, contact a Campbell Scientific
application engineer.
NOTE
31