LI-COR LI7200RS, Instruction Manual

Page: 70 / 226

Section 3. Operation
values in units of m/s. What is the wind speed when the sonic anemometer outputs
a raw voltage value of 0.5 V?
1 Set the
Type
field to U. Set the
Units
field to m/s. The
Label
is set automatically.
2
Enter 12 for the Multiplier (m) and -30 for the Offset (b).
Using the slope intercept equation:
3-3 y = m*x + b
the wind speed is calculated as
3-4 y = 12(0.5) + (-30) = -24 m/s
Example 2: You have configured the Gill WindMaster to output raw voltages for
auxiliary input U over the range of ±5V, and over a full scale wind speed of -30 to
+30 m/s. You want to convert the raw voltages to wind speed and output the values
in units of m/s. What is the wind speed when the sonic anemometer outputs a raw
voltage value of 1.5V?
1 Set the
Type
field to U. Set the
Units
field to m/s. The Label is set automatically.
2 Enter 6 for the Multiplier (m) and 0 for the Offset (b).
Using equation 3-3 above, the wind speed is calculated as
3-5 y = 6(1.5) + 0 = 9 m/s
3-28 LI-7200RS Enclosed CO₂/H₂O Analyzer