Vaisala WXT520 Guide de l'utilisateur télécharger pdf (Page 113)

Chapter 8 ____________________________________________ Sensor and Data Message Settings

VAISALA______________________________________________________________________ 111

Changing the Settings (aWU)

You can change the following settings:

- parameters included in the wind data message,

- update interval,

- averaging time,

- wind speed max/min calculation mode,

- speed unit,

- direction offset, and

- NMEA wind formatter.

Make the desired setting with the following command. Select the

correct value/letter for the setting fields, see Setting Fields on page 109.

See the examples.

Command format in ASCII and NMEA 0183:

aWU,R=x,I=x,A=x,G=x,U=x,D=x,N=x,F=x<cr><lf>

Command format in SDI-12:

aXWU, R=x,I=x,A=x,G=x,U=x,D=x,N=x,F=x!

where

R, I, A, G,

U, D, N, F

= The wind sensor setting fields, see Setting Fields on

page 109.

x = Value for the setting

<cr><lf> = Command terminator in ASCII and NMEA 0183

! = Command terminator in SDI-12

NOTE

If averaging time [A] is greater than update interval [I], it shall be a

whole multiple of the update interval and at maximum 12 times

greater. Example: If I = 5 s, A

max

= 60 s.

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Vaisala WXT520 Guide de l'utilisateur Page 113