Vaisala Hydromet Data Collection Platform - Manual (Page 158)

User’s Guide ______________________________________________________________________
156 __________________________________________________________________M210785EN-E
0711-089 Figure 75 Electrical Connection View
7. Click Finish to exit the wizard.
After configuring with the measurement setup wizard, you can
further view or edit the parameters using the standard Lizard setup
view for analog measurements.
Combined Wind Speed and Direction
Measurement
The QMW Combined Wind Speed and Direction Sensor supports
sampling rates of less than 1000 ms. Less than 1 s sampling interval is
seldom needed; however, even 4 Hz (250 ms) sampling is possible.
Offset and gain are sensor-specific parameters, and normally, you
should not change the default values when a standard QMW sensor is
used. The gain and offset values are variables of the anemometer
transfer function:
U = offset + F × gain
where
U
= Wind speed [m/s]
F = Sensor output frequency [Hz]
offset = -0.24 (default for QMW)
gain = 0.699 (default for QMW)