Version 1.1
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Distance = 4 x (20 – 5)’ = 60’.
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.
Without a calibrated source, wind speed can be difficult to measure. We recommend using a
calibrated wind meter (available from Ambient Weather) and a constant speed, high speed fan.
(7)
The rain collector is calibrated at the factory based on the funnel diameter. The bucket tips
every 0.01” of rain (referred to as resolution). The accumulated rainfall can be compared to a
sight glass rain gauge with an aperture of at least 4”. The following is a link to an accurate
sight
glass
rain
gauge:
http://www.ambientweather.com/stprraga.html
Make sure you periodically clean the rain gauge funnel.
Note:
The purpose of calibration is to fine tune or correct for any sensor error associated with the
devices margin of error. Errors can occur due to electronic variation (example, the temperature sensor
is a resistive thermal device or RTD, the humidity sensor is a capacitance device), mechanical
variation, or degradation (wearing of moving parts, contamination of sensors).
Calibration is only useful if you have a known calibrated source, you can compare it against, and is
optional. This section discusses practices, procedures, and sources for sensor calibration to reduce
manufacturing and degradation errors. Do not compare your readings obtained from sources such as
the internet, radio, television, or newspapers. The purpose of your weather station is to measure
conditions of your surroundings, which vary significantly from location to location.
2.11
Adding Additional Sensors
The OBSERVERIP2.0 module supports up to 8 additional thermos-hygrometer sensors (Model
WH31E, WH31P, WH31PF). Place the sensors in and around your home and monitor on
AmbientWeather.net.
The data is automatically passed from the OBSERVERIP2.0 module to AmbientWeather.net based on
the channel number.
Figure 8