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My indoor temperature in the monitor for W155 shows too low/too high compared to another weather station or thermometer I have, why?

April 26, 2017high indoor low monitor shows station temperature w155 weather

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My indoor temperature in the monitor for W155 shows too low/too high compared to another weather station or thermometer I have, why?

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• All electronic weather stations are calibrated after the following procedure: A very accurate thermometer gives you a temperature X. From this given temperature X all weather stations are tested and an inaccuracy on + – 2 degrees Celsius is accepted. That is why two weather stations can both be right even though there is a difference of 4 degrees Celsius between them. If one weather station is accepted with minus 2 degrees Celsius and another weather station is accepted with plus 2 degrees Celsius, you have the 4 degrees Celsius difference. • To compare two thermometers you must accept a difference of 4 degrees Celsius and they have to be located in the exact same spot under the same conditions.