USER'S GUIDE____________________________________________________________________
106 _________________________________________________________________ M210704EN-F
Examples:
>
unit m
Output units : metric
>
>
unit h2o ppmv
H2O units : ppmV
>
Use the
MOL/MOLI
command to view/set mole weight parameter that
will be used in calculating H
2
O ppm
w.
Pressure Compensation Setting
The pressure has an effect on humidity calculations and accuracy.
Therefore, accurate calculations can be achieved only when the process
pressure is taken into consideration.
Note that conversions from mmHg and inHg are defined at 0°C and for
mmH
2
O and inH
2
O at 4°C.
NOTE
Pressure compensation is intended to be used in normal air only. When
measuring in other gases, please contact Vaisala for further information.
NOTE
Fixed pressure compensation value of 1013.25 hPa is used when in
adjustment mode.
Using Display/Keypad
Use display/keypad to set the pressure compensation. To select the
pressure unit using display/keypad see section Changing the Quantities
and Units on page 103.
1.
Press any of the arrow buttons to open the
Main Menu
.
2. Select
Measuring
and press the
►
arrow button to confirm your
selection.
3.
Select Pressure compensation and press the
►
arrow button to
confirm you selection.
4. Press
SET
and enter the pressure value by using the arrow buttons.
5. Press
OK
and
EXIT
to return to the basic display.
