Vaisala HMP230 - Manual (Page 105)

HMP230 SERIES
M210225en-B Appendix 1: Serial commands
99
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 pressure compensation of the
HUMICAP
   
sensor and mixing ratio, wet bulb temperature
and enthalpy calculations temporarily
XPRES pppp.pp
pppp.pp = pressure (hPa)
The function and format of XPRES are the same as those of the PRES com-
mand except that with XPRES command the setting is valid only until a reset
is given, power is turned off or pressure is set to zero with XPRES. After this
the pressure stored with command PRES is valid again.
CDATE Entering calibration date
CDATE xxxxxx
xxxxxx = calibration date (000101...991231)
When the latest calibration date has to kept in memory, it is entered as fol-
lows:
>CDATE 940506
If the command is given without the date, the transmitter outputs the latest
calibration already in memory.
>CDATE
940420
The date can be given in any format; however, the maximum number of digits
is six.