Vaisala PTB220 User Manual
Page 21
C
HAPTER
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COMMISSIONING
V
AISALA
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NOTE
The pulse output mode can be used with hPa/mbar pressure units
only!
Example of software settings for the pulse output mode:
>pulse
OFF
SLOW LOW
0.0
>pulse on slow low
ON
SLOW LOW
0.0
>pulse on fast high -800
(note the minus sign)
ON
FAST HIGH
-800.0
>pulse off
OFF
FAST HIGH
-800.0
>
The operation of pulse output mode can be tested through the RS232C
serial interface using the PTEST command (see page 69).
In addition to the above mentioned software settings, the user must
finally set the switch SW3 to position ON (see Hardware settings on
page 33) for the barometer to start to wait for an external trigger pulse.
See page 83
for quick reference information on how to set and use the
pulse output mode of the PTB220 series digital barometers.
NOTE
In case of an error in a PTB220 series barometer, 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.