Vaisala PTB200 Manual do Utilizador descarregar pdf (Página 11)

PTB 200 10 (28)

Digital Barometers

SSD/Operating Manual 24th February 1993 PTB200-O0284-1.1

3 SERIAL COMMANDS

3.1 General

When delivered from factory the barometers are in serial full duplex RS

232C mode. No handshaking lines are in use. All commands are

echoed. The factory settings of the serial bus are:

baud rate 1200

parity even

data bits 7

stop bits 1

echo ON

sending mode STOP

address 0

The following table briefly shows the configuration commands used to

change the settings of the PTB 200 barometers.

Function Command Comment

serial bus settings SERI

echo on/off ECHO

output format FORM

pressure resolution FORM

units UNIT

integration time MTIM, FILT

settling time, response

time

MTIM, FILT

sending mode SMODE STOP, RUN and POLL

modes

address ADDR for POLL mode only

single output command SCOM in STOP and RUN modes

only

sleep mode SLEEP

list of software settings ?

The default output format, pressure resolution and pressure unit have

been set to fit meteorological requirements. The internal time constants

of the barometers have been chosen to prioritize short settling time

(PTB 200 A: 2 s, PTB 201 A: 1 s) and high pressure resolution (PTB

200 A: 0.01 hPa, PTB 201 A: 0.1 hPa). If longer settling time can be

accepted, use longer integration time to suppress noise effects.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 29 30

Sem comentários

Vaisala PTB200 Manual do Utilizador Página 11