Vaisala PTB220 Manual de usuario descargar pdf (Pagina 109)

APPENDIX L ____________________________________________________ SPECIAL EMULATION MODE

VAISALA ________________________________________________________________________ 103

APPENDIX L SPECIAL EMULATION MODE

The PTB220 series digital barometers can partially emulate the

PA11A and the Setra 470 digital barometers. To activate the desired

emulation mode first turn the power off, then make the given switch

selections and switch barometer on again.

PA11A

The PTB220 series digital barometers can partially emulate the

PA11A digital barometers. Any serial bus and measurement related

software settings must be done before selecting the emulation mode.

P Mode

The P mode just sets the PTB220 series barometer to output the

message type 1 of serial mode 2 of the barometer. Please note the

capital letter P in the command. The dip switch settings should be as

in FIGURE L-1.

FIGURE L-1 PA11A emulation P mode

Message 1 format is as follows:

<sp>P

<sp>ssssssss<sp>

where;

Pressure transducer 1 (with 5 characters)

Pressure transducer 2 (with 5 characters)

Pressure transducer 3 (with 5 characters)

ssssssss Average status. 10000000 means OK with all three

transducers included. Otherwise, the last three bits

of the status will indicate the transducers that are

included when calculating the average e.g. status

00000110 means that transducers 2 and 3 are

included and 1 ignored.

1 2 ... 104 105 106 107 108 109 110 111 112 113

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Vaisala PTB220 Manual de usuario Pagina 109