Vaisala Hydromet Data Collection Platform - Manual (Page 69)

Chapter 3 _____________________________________________ Configuring Modules and Sensors
VAISALA_______________________________________________________________________ 67
METEK 3D Ultrasonic Anemometer
The Ultrasonic Anemometer, model USA-1, is an ultrasonic wind
sensor manufactured by Meteorologische Messtechnik (METEK)
GmbH. The sensor measures wind speed and wind direction, or
alternatively the three orthogonal wind components x, y, and z.
There are several serial output settings available for this sensor. The
implementation is based on a standard version and the QML logger can
receive the following message formats:
M:x = 10 y = -3 z = -1 t = 2203
H:x = 10 y = -3 z = -1 t = 2203
D:x = 10 y = -3 z = -1 t = 2203
The first character of the message indicates the heating status of the
sensor:
Heating is controlled by the ultrasonic anemometer, and it is based on
user-configurable settings.
The message also includes the wind components x, y, and z, as well as
a temperature component t. The unit of the wind components is cm/s
and the unit of the temperature component is Celsius degrees with two
decimals.
The example message above is thus interpreted as follows:
M = Heating is OFF
H = Heating is ON
D = Heating should be ON but there is a defect
x = 10 X component of wind is 10 cm/s
y = -3 Y component of wind is -3 cm/s
z = -1 Z component of wind is -1 cm/s
t = 2203 Temperature is 22.03 Celsius degrees