72
The standard sea-level pressure is 29.92 in Hg (1013 mb). This is
the average sea-level pressure around the world. Relative pressure
measurements greater than 29.92 inHg (1013 mb) are considered
high pressure and relative pressure measurements less than 29.92
inHg are considered low pressure.
To determine the relative pressure for your location, locate an
official reporting station near you (the internet is the best source for
real time barometer conditions, such as Weather.com or
Wunderground.com), 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.
(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 evapotransporation 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 is 4 x the
distance of the tallest obstruction. For example, if your house is 20’
tall and you mount the sensor on a 5’ pole:
Distance = 4 x (20 – 5)’ = 60’ or =4 x (6.10-1.52)=18.32m.
Many installations are not perfect and installing the weather station
on a roof can be difficult. Thus, you can calibrate for this error with
a wind speed multiplier.
In addition to the installation challenges, wind cup bearings (moving
parts) wear over time.
Summary of Contents for HP1000SE PRO
Page 1: ...1 HP1000SE PRO Ultrasonic WiFi Internet Funk Wetterstation Manual EN ...
Page 61: ...61 Dashboard Graph display ...
Page 62: ...62 List display Weather Map ...
Page 74: ...74 ...
Page 76: ...76 ...