Vaisala PTB220 Series Guide de l'utilisateur télécharger pdf (Page 76)

USER'S GUIDE_______________________________________________________________________

70 ___________________________________________________________________ M210194EN-A

The response to the PTEST command in the serial interface consists

of the pressure reading, pressure reading corrected with defined offset

and the number of pulses to be output. See the PULSE command in

Chapter Operating modes for information on how to make the settings

of pulse output mode.

The switch SW3 may be in position ON or OFF (see Chapter

Hardware settings) when the PTEST command is being used.

Examples with output of measured pressure:

>pulse <cr>

ON SLOW LOW 0.0

>ptest <cr>

1013.250 1013.250 10133

>pulse slow low -800 <cr>

ON SLOW LOW -800.0

>ptest <ccr>

1013.250 213.250 2133

Examples with output of pre-defined pressure (e.g. 1000 hPa):

>pulse <cr>

ON SLOW LOW 0.0

>ptest 1000 <cr>

1000.000 1000.000 10000

>pulse slow low -800 <cr>

ON SLOW LOW -800.0

>ptest 1000 <cr>

1000.000 200.000 2000

In case of an error, there will be no pulse output from the barometer

despite an external trigger pulse. This error handling technique

ensures that a host system cannot receive erroneous pressure readings

from a PTB220 series barometer.

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Vaisala PTB220 Series Guide de l'utilisateur Page 76