Aercus Instruments™
- WeatherMaster
76 |
P a g e
Thus, your absolute pressure may read 1030hPa at an altitude of
200m, but the relative pressure is 1006hPa.
The standard sea-level pressure is 1013hPa. This is the average
sea-level
pressure
around
the
world.
Relative
pressure
measurements greater than 1013hPa are considered high pressure
and relative pressure measurements less than 1013hPa are
considered low pressure.
To determine the relative pressure for your location, locate an
official reporting station near you from an official source and
set your weather station to match the official reporting station.
(4)
Only use this if you improperly installed the weather station
sensor array, and did not point the direction reference to true
north if located in the Northern Hemisphere.
SOUTHERN HEMISPHERE USERS!!!
For stations located in the
Southern Hemisphere
you must follow
the southern hemisphere wind recalibration instructions in
Appendix 1 otherwise your wind direction readings will be
incorrect.
(5)
The default conversion factor based on the wavelength for
bright sunlight is 126.7 lux/ w/m
2
. This variable can be adjusted
by photovoltaic experts based on the light wavelength of
interest, but for most weather station owners, is accurate for
typical applications, such as calculating evapotranspiration and
solar panel efficiency.
(6)
Wind speed is the most sensitive to installation constraints.
The rule of thumb for properly installing a wind speed sensor
