WindSonic Doc No 1405 PS 0019 Issue 28 November 2019
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9.7.4 Wind Speed scaling
Analogue Outputs are always scaled in m/s irrespective of the digital output units of
measurement setting.
The Wind Speed output can be configured such that full-scale output represents 5, 10, 20,
30, 40, 50, 60 (or 80 on Windsonic 75) metres/sec.
In all cases zero Wind Speed is represented by 0V, 0mA or 4mA.
9.7.5 Tunnel mode
When configured in Tunnel mode, Channel 1 output represents the wind speed along the U
axis (South – North) scaled as described above.
Channel 2 gives the direction of the wind along the U axis, where a –U vector (= wind from
the N direction) is represented by 0V (or 0mA, 4mA), and a +U vector is represented by 5V
(or 20mA).
9.7.6 Analogue Output Rate
In Continuous and Polled modes the analogue output update rate will be determined by the P
command setting.
9.7.7 Disabled outputs
If the analogue outputs are not required, they can be disabled (Command S9).
9.7.8 Analogue Output Conditions
Analogue signals are output together with Digital Outputs signals.
Analogue signals are output continuously when in Digital Polled Mode.
Note: - The WindSonic provides the power for current output loads. Do not connect the
WindSonic output to instruments where power for the current loop is provided by the
instrument connecting to the WindSonic current output connections.
