Sutron Satlink 3, Operation & Maintenance Manual

Page: 33 / 181

Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 33

DC high or AC low: AC low level (for unamplified RMYOUNG)

Slope:
Wind Speed Units Slope
m/s 0.098
knots 0.1904
mph 0.2194
kph (km/h) 0.3528
To setup for wind vector measurements, go to 9.3.6 Measure Type: Wind.
4.22. Connecting Lufft Wind Sensors
Lufft has a family of smart weather sensors capable of measuring a variety of parameters,
including wind speed, direction, air temperature, relative humidity, and air pressure. In addition,
it is possible to setup the Lufft sensor to automatically perform average and vector average
calculations on the wind speed and direction in which case you do not need to use the Wind
Measurement type in SL3.
The Lufft sensor connects to SL3 as an SDI sensor to either SDI#1, SDI#2 or RS485 (SL3-1). To set
the units use the SDI command aXUu for US units or aXUm for metric. To set the averaging wind
averaging interval to 5 minutes use the following SDI command: aXAw+5. See the Lufft Manual
Family of Smart Weather Sensors for details.
Use the C or C4 commands to read wind data from the Lufft sensor. The C commands are
needed as the Lufft sensor often has more than 9 parameters in its output. The response to the
C command may provide different data based on what model is connected. For example, the
WS200-UMB provides the following data in response to the C command:
WS200 UMB
Parameter Description
0 Wind Speed (avg) *units based on
settings in the WS200
1 Wind Speed (max)
2 Wind Direction (vector)
3 Wind Direction (act)
4 Compass Heading (act)
5 Wind Speed (act)
6 Wind Speed (min)
7 Wind Speed (vct)
8 Wind Quality
9 Wind Direction (min)
10 Wind Direction (max)
11 Wind Direction corr (act)
Other Lufft sensors with temperature and other measurements provide the wind speed and
direction as parameters 3 (average speed), 4 (max speed) and 5 (vector direction) and 14 (vector
speed) with detailed wind information available using C4. Consult the Lufft manual for details.
4.23. Connecting Digital Outputs
SL3-1 provides two digital output lines: DOUT#1 and DOUT#2.