R3-50, R3-100 and R3A-100 Doc. No 1210-PS-0015 Issue 2
June 2021
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Page 16
8.6 Wind Measurement, SoS and Temperature Reporting Format
The wind measurement can be output in one of the following formats:
1.
U, V & W, calibrated (ms)
2.
U, V & W, uncalibrated (ms)
3.
Polar & W, calibrated (° & ms)
4.
Polar & W, uncalibrated (° & ms)
5.
Axis velocities, uncalibrated (ms)
In U, V,W modes the alignment of the U and V axes can be selected as follows:-
Axis
U in line with Axis 1 when the anemometer is viewed from above.
Spar
U is in line with the main spar when viewed from above. In this configuration U, V, W are
labelled U', V', W'.
The U, V, W axis alignment options are shown in the relevant U, V, W axis definition drawing on
page 8, figure 2.
The axis alignment can be selected using the Configuration menu and the ALIGNUVW command if
using your own PC software.
The speed of sound measurement results can be output in one of the following formats:
1.
Speed of Sound (ms)
2.
Sonic Temperature (K)
3.
Sonic Temperature (°C)
Speed of sound measurements can be disabled.
The absolute tem perature m easurem ent results can be output in one of the following
form ats:
1.
Absolute Temperature (K)
2.
Absolute Temperature (°C)
Absolute temperature measurements can be disabled.
8.7 Analogue Input Reporting Formats
If ASCII format is selected, analogue input measurements are output in volts to 4 decimal places. If
binary format is selected, analogue input measurements are output in 2's complement.
The number of analogue inputs to be measured can be set from 0 to 6.
8.8 Diagnostics
The system reports error codes if a failure is detected of the ultrasonic transducers, non-volatile
memory or PRT.
8.9 Confidence Tone
This function is enabled by default, normal instrument operation is indicated by a repetitive audible
tone from within the anemometer.
To turn off the Confidence Tone place the unit into Interactive Mode and use the command CTONE
DISABLE.
8.10 Result Reporting
The selected parameters are blocked together along with the diagnostic results and block control
information to form a result message. The result message can either be in a Binary or ASCII format.
In the ASCII format the fields can be padded to form a fixed field size if required. The way the result
message is transmitted is dependent on the reporting mode:
1.
Continuous mode - the result message is transmitted immediately after calculation.
2.
Polled mode - the host pc requests data from the anemometer. The anemometer responds
by sending the current result message.
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