Vaisala GMT220 - Manual (Page 22)

USER'S GUIDE____________________________________________________________________
22 __________________________________________________________________ M010022EN-F
Pressure Compensation
For achieving the most accurate measurements in high altitudes where
the barometric pressure is lower than in the sea level, the actual pressure
value can be set to the GMT220's software. The factory setting is 1013
hPa. Pressure values in different altitudes are shown in Table 5 below.
The ambient pressure value can be set by using the following command:
MF_PRESSURE xxxx
where: xxxx = pressure in hPa
Example of setting desired pressure:
>MF_PRESSURE 900
MF_PRESSURE=900
>
Save the settings:
MAIN_SAVE F
Table 5 Altitude and Atmospheric Pressure
Altitude m (ft) Atmospheric Pressure
(hPa) Atmospheric Pressure
(psi)
0 (sea level) 1013 14.69
500 (1640) 954 13.84
1000 (3281) 899 13.04
1500 (4921) 845 12.26
2000 (6562) 795 11.53
2500 (8202) 757 10.83
3000 (9843) 701 10.17