Vaisala PTB220 Series Guia do Utilizador descarregar pdf (Página 100)

USER'S GUIDE_______________________________________________________________________

94 ___________________________________________________________________ M210194EN-A

>addr 7 <cr> (select address of the barometer)

Address : 7 <cr>

>smode poll <cr> (select the POLL mode)

Serial mode : POLL

>reset <cr> (resetting will activate the new settings)

(no title will appear after reset in POLL mode)

send 7 <cr> (text invisible)

1013.25 hPa

The next picture (below) shows typical RS485/422 differential input

signals RS485/422 LO (upper signal) and RS485/422 HI (lower

signal) at baud rate 9600. The vertical scale is 2V/div for both signals.

The ground level for each signal is shown with a small arrow at the

right. At the left, the signals are at rest.

The next picture (below) shows typical RS485/422 differential output

signals RS485/422 LO (upper signal) and RS485/422 HI (lower

signal) at baud rate 9600. The vertical scale is 2V/div for both signals.

The ground level for each signal is shown with a small arrow at the

right. At the left, the signals are at rest.

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Vaisala PTB220 Series Guia do Utilizador Página 100