Pressure Corrected To Sea Level - Omega HHP360 Series User Manual

Pressure Corrected to Sea Level

Pressure reduction to Sea Level is required so that barometric
readings can be compared at different elevations. The correction to
sea level is done using a "hypsometric equation". This equation
simulates a "fictitious column of air" which extends downward
from the instruments location to sea level. This fictitious column is
assumed to be similar to the actual air column over nearby lower
elevations. Some properties are related to observed conditions
while others must be assumed. Barometric pressures given by the
National Weather Service and used at airports are always corrected
to sea level.
To set the unit to display pressure corrected to sea level:
Keystroke
1. Determine the elevation
of the instrument above
sea level, in meters. 700
meters will be used as an
example.
2. From Measure Mode
press the PRGM key.
3. Press the ▲ or ▼ key
until "SEA LEVEL
SELECT" is displayed.
4. Press the PRGM key.
5. Press the ▲ or ▼ key to
indicate the correction to
sea level status.
17 of 36
Display
Top line reads "PROGRAM
MODE". Bottom line reads
"UNITS SELECT".
Top line reads "PROGRAM
MODE". Bottom line reads
"SEA LEVEL SELECT".
Top line reads "SEA LEVEL
SELECT". Bottom line reads
either "ENABLE" or
"DISABLED".
Bottom line toggles between
"ENABLE" and
"DISABLED".