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.
Typical Calibration Source
Red Spirit or Mercury
Thermometer (1)
Calibrated laboratory grade
barometer
Calibrated laboratory grade
wind meter (5)
Sight glass rain gauge with
an aperture of at least 4” or
0.1m (6)
Table 6: Calibration parameter summarization
(1) Temperature errors can occur when a sensor is placed too close to a heat
source (such as a building structure, the ground or trees).
To calibrate temperature, we recommend a mercury or red spirit (fluid)
thermometer. Bi-metal (dial) and digital thermometers (from other weather
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