RST meteoscan 938PRO, Operation Manual, Page: 13 / 56

RST01937 meteostanciya
page 13
5.3.1 Notes about Calibration
Note: The calibrated value can only be adjusted on the console. The remote sensor(s) always
displays the un-calibrated or measured value.
Note: The measured humidity range is between 10 and 99%. Humidity cannot be accurately
measured outside of this range. Thus, the humidity cannot be calibrated below 10% or above
99%.
The purpose of calibration is to fine tune or correct for any sensor error associated with the devices
margin of error. The measurement can be adjusted from the console to calibrate to a known
source.
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 re-
duce manufacturing and degradation errors. Do not compare your readings obtained from
sources such as the internet, radio, television or newspapers. They are in a different location and
typically update once per hour.
The purpose of your weather station is to measure conditions of your surroundings, which vary sig-
nificantly from location to location.
5.3.2 Humidity Calibration Methods
Official stations recalibrate or replace humidity sensors on a yearly basis. Due to manufacturing
tolerances, the humidity is accurate to ± 5%. To improve this accuracy, the indoor and outdoor
humidity can be calibrated using an accurate source, such as a sling psychrometer or one step
humidpak calibration kits.
5.3.3 Temperature Calibration Methods
Temperature errors can occur when a sensor is placed too close to a heat source (such as a build-
ing structure, the ground or trees).
To calibrate temperature, we recommend a mercury or red spirit (fluid) thermometer. Bi-metal
(dial) and other digital thermometers are not a good source and have their own margin of error.
Using a local weather station in your area is also a poor source due to changes in location, timing
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