Vaisala HMP228 Manuel d'utilisateur télécharger pdf (Page 73)

HMP228

M210282en-A Appendix 2: Display commands

1. DISPLAY COMMANDS

The HMP228 transmitter uses a microprocessor; therefore its configuration

can be set according to the user's needs. This is done through commands. Most

often the commands are used to change the settings of the two analogue

channels.

A full range of commands can be given through the display/keypad. The

commands can be used e.g. to select and scale the outputs, to calibrate the

humidity and temperature channels as well as the analogue outputs and to set

the serial interface.

1.1 Display/keypad commands

1.1.1 Output via the serial bus

1.1.1.1 Turning the serial interface echo ON/OFF

• Select More in the main menu, select More in the More menu, then

again More and then Echo.

• Use the arrow keys to select the right alternative and press ENT.

1.1.1.2 Serial bus settings

• Select Seri in the main menu; the currently valid serial interface set-

tings are displayed:

• If the settings are correct, press ENT; the programme returns to the

display mode.

• If the settings need to be changed, press CL:

• Select the parameter to be changed with the arrow keys and ENT key.

Selecting baud rate:

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 114 115

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Vaisala HMP228 Manuel d'utilisateur Page 73