Vaisala PTB220 - Manual (Page 31)

C HAPTER 4_____________________________________________________________ COMMISSIONING
V AISALA _________________________________________________________________________ 25
UNIT Setting the pressure and temperature units
UNIT x
where (* = factory setting)
x = hPa*
kPa
Pa
mbar
inHg
mmHg
torr
mmH
2
O
psia
C*
F
This command is used to set and inspect the pressure and internal
temperature compensation unit. The temperature unit is not confirmed
by the barometer.
Example of changing the pressure and temperature units:
>unit
P unit
: hPa
>unit C
>send
1035.19 hPa
25.9 'C
>unit torr
P unit
: torr
>unit F (temperature unit not confirmed)
>send
776.44 torr 78.6 'F
>
HHCP Setting the height of height correction
HHCP x
The HHCP command is used to give the height for height corrected
pressure. The value is set in meters and the range, which can be used,
is -40...+40 m. Height corrected pressure is calculated according to the
following equation.
h P HCP ⋅ =
+
1176 . 0 (4-1)