Vaisala PTB220 User Manual download pdf (Page 111)

APPENDIX L ____________________________________________________ SPECIAL EMULATION MODE

VAISALA ________________________________________________________________________ 105

Setra 470

A limited subset of commands is available provided that the switch

SW7 is set as in FIGURE L-3.

OFF

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

FIGURE L-3 Special emulation mode

The serial bus settings are now as follows:

TABLE L-1 Serial bus settings in emulation mode

Baud rate 2400

Parity no parity

Data bits 8

Start bits 1

Stop bits 1

Duplex full duplex

Echo OFF

In this mode the PTB220 barometer ignores carriage returns, line

feeds and blank spaces. Just type the commands as given here.

At power-up the PTB220 barometers will respond:

VAISALA DIGITAL BAROMETER

PTB 220

BUSY

and then after a few seconds:

VAISALA DIGITAL BAROMETER

PTB 220

11.812 to 35.436 in Hg A

The output after the P command is:

30.1074 in Hg A OK

The output after the V command is:

VAISALA DIGITAL BAROMETER

PTB 220

11.812 to 35.436 in Hg A

1 2 ... 106 107 108 109 110 111 112 113

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Vaisala PTB220 User Manual Page 111