Display commands – Vaisala HMP228 User Manual

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HMP228

M210282en-A

Appendix 2: Display commands

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: