Instruction Manual

HMP230 SERIES

M210225en-B Appendix 1: Serial commands

NOTE

The temperature unit in offset correction is always de-

grees Centigrade, even if the transmitter is using non-

metric units (Fahrenheit) in its measurement output.

3. OUTPUT VIA THE SERIAL BUS

R Starting the measurement output

R <cr>

Starts output of measurements to the peripheral devices (PC display or

printer); output interval is set with command INTV.

The output format depends on the transmitter configuration and which vari-

ables are in use. The order, however, is always the same: relative humidity,

temperature, dewpoint temperature, absolute humidity, mixing ratio and wet

bulb temperature. An example:

RH= 43.0 %RH T= 21.0 'C Tdp= 8.0 'C x= 6.7 g/kg Tw= 13.7 'C

h=34.4 kJ/kg <cr><lf>

When the transmitter sends out the readings, the serial interface does not echo

any commands; the only command that can be used is S (stop).

The output mode can be changed with command FORM.

S Stopping the measurement output

S<cr>

Ends the RUN state; after this command all other commands can be used.