
USER'S GUIDE____________________________________________________________________
92 __________________________________________________________________ M210762EN-D
NOTE
This command changes both the serial output and display units to either
metric or non-metric units. When you want to output both metric and
non-metric units simultaneously on the display, select the display units
by using the display/keypad.
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. If you are using mixing ratio as an
output quantity, it is recommended that you make the pressure
compensation setting.
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 Quantities and
Units on page 89.
1. Open the MAIN MEN
U by pressing any of the ▲▼◄► arrow
buttons.
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.
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