Vaisala HMP260 - Manual (Page 85)

HMP260 SERIES
Appendix 1: Serial commands
HMP260-U017en-1.5
MTIM
Mtim : 4 ? 5
or
MTIM 5
Mtim : 5
PRES Setting the pressure for mixing ratio and wet bulb
calculations
PRES pppp.pp
pppp.pp = pressure (hPa)
The atmospheric pressure has an effect on mixing ratio and wet bulb. Accurate
calculations can be achieved only when the ambient pressure is taken into consideration.
When the command is given, the transmitter first gives the currently used pressure; after
this a new value can be entered or the old one acknowledged.
PRES
Pressure : 1013.25 ? 1000.00
When the currently used pressure is known, a new pressure can also be entered
directly:
PRES 1010
Pressure : 1010
NOTE
If the pressure setting is frequently adjusted, e.g. by using an
external barometer as a pressure input source, the command
XPRES is recommended.
XPRES Setting the pressure for mixing ratio and wet bulb
calculations temporarily
XPRES pppp.pp
pppp.pp = pressure (hPa)
The function and format of XPRES are the same as that of the PRES command except
that by using XPRES the setting is valid only until a reset is given or power is turned off