Table 7-4: Measurement lags (N
lag
) for analog measurements or measurements with no delay
Mode
Measurement lag (N
lag
)
0
1/
1 data logger scan
2
Unprompted output rate/100 (lag in seconds)
1 and 3
Lag is in output samples
Output rate (f
scan
)
10 Hz
20 Hz
50 Hz
100 Hz
Bandwidth
5 Hz
8
2/
16
40
80
10 Hz
4
8
2/
20
40
25 Hz
1/
-
-
8
2/
16
1/
Wide bandwidth, good for flux applications
2/
Anti-aliased frequency response, good for spectral analyses
in output samples
7.5 Data logger programming using SDM or
CPI
The
CSAT3B()
CRBasic instructions control and retrieve data from the CSAT3BH. These
instructions are available on the CR6, CR1000X, CR800/850, and CR3000 data loggers.
The following sections give specifics about CRBasic instructions.
7.5.1
CSAT3B()
The
CSAT3B()
instruction is the primary instruction used to retrieve anemometer data from the
CSAT3BH. This will set the operating mode of the anemometer and retrieve the wind, sonic
temperature, and diagnostic information. The instruction requires four parameters that are
further described in the following sections:
l
Destination
l
Bus
l
CSAT3BAddress
l
CSAT3BMode
CSAT3BH Three-Dimensional Heated Sonic Anemometer
73
