Vaisala HMP260 - Manual (Page 81)

HMP260 SERIES
Appendix 1: Serial commands
HMP260-U017en-1.5
The settings can be changed one parameter at a time or all parameters at once:
SERI O H changing parity and duplex
4800 O 7 1 HDX
SERI 600 N 8 1 F
changing all parameters
600 N 8 1 FDX
The processor does not allow the following combinations:
• no parity, 7 data bits, 1 stop bit: if this combination is given the HMP260
programme will change the number of stop bits to 2
• even or odd parity, 8 data bits, 2 stop bits: if this combination is given the
programme changes the number of stop bits to 1
NOTE
The serial bus settings become effective only after reset.
When the half-duplex mode is set, it will automatically turn the echo off. Even then the
ECHO command can indicate that echo is on.
UNIT Selecting the output units
UNIT x
x = m(etric units)
n(on-metric units)
metric units non-metric units
RH %RH %RH
T
°
C
°
F
Td
°
C
°
F
a g/m 3 gr/ft 3
x g/kg gr/lb
Tw
°
C
°
F
For example, the command for setting the non-metric units is:
UNIT N
Output units : non metric
When the command is given with no parameters, the transmitter outputs the currently
valid setting.