Vaisala PTB220 Series Guide de l'utilisateur télécharger pdf (Page 91)

APPENDIX D ____________________________________________________ PULSE OUTPUT MODE

VAISALA _________________________________________________________________________ 85

at 1100 hPa/mbar pressure. The gate-open time could be 0.5 ... 1

second.

The pulse output mode settings must be made on two levels:

- software settings

- hardware settings.

Example of software settings for the pulse output mode:

>pulse <cr>

OFF SLOW LOW 0.0

>pulse on slow low <cr>

ON SLOW LOW 0.0

>pulse on fast high -800 <cr> (note the negative sign of

pressure offset)

ON FAST HIGH -800.0

>pulse off <cr>

OFF FAST HIGH -800.0

As a hardware setting the user must set the switch SW3 to the position

ON (see Hardware settings) for the barometer to start to wait for an

external trigger pulse.

OFF

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

The pulse output mode can be tested through the RS232C serial

interface using the PTEST command (see Diagnostic commands). The

switch SW3 may be in position ON or OFF (see Hardware settings)

when the PTEST command is being used.

Examples of pulse output mode testing:

>pulse <cr>

ON SLOW LOW 0.0

>ptest <cr>

1013.250 1013.250 10133 (outputting prevailing pressure)

>pulse slow low -800 <cr>

ON SLOW LOW -800.0

>ptest <cr>

1013.250 213.250 2133

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Vaisala PTB220 Series Guide de l'utilisateur Page 91