Vaisala DMP248, Operating Manual

Page: 52 / 141

OPERATING MANUAL _______________________________________________________________
48_____________________________________________________________________M210492
EN
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A
If you press any key, the calibration is interrupted. If no key is
pressed, the calibration takes place immediately. If the process is
unstable or relative humidity is over 10%, the prompt (>) appears
immediately. In that case the calibration is not performed. The
calibration is not performed again even if the maximum correction is
exceeded. (see Chapter Display/keypad commands)
Pressure compensation
PRES pppp.pp <cr>
where pppp.pp = absolute pressure (hPa).
value has to be entered in the transmitter memory in order to ensure
the best possible measurement accuracy. The pressure setting is used
for pressure compensation of the DMP248 transmitter. The pressure is
given in hPa/mbar; for converting pressure units, see Appendix 8.
When the command is given, the transmitter first gives the current
pressure; after this the new value can be entered or the current one
acknowledged.
>PRES <cr>
Pressure :
1013.25 ? 1000.00 <cr>
When the current pressure is known, a new pressure can also be
entered directly:
>PRES 1010 <cr>
Pressure : 1010
NOTE If the security lock jumper is not connected, the pressure
compensation is made with the value 1013.25 hPa.
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 (see Appendix 1).
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