Humidity measuring device and method for operating a humidity measuring device

A method for operating a humidity measuring device, the humidity measuring device comprising a capacitive humidity sensor for determining a humidity content in a surrounding medium, the humidity sensor being surrounded by a protective layer permeable to water molecules, the method comprising:

• heating the humidity measuring device to a heating temperature;
• after a specific period at the heating temperature, cooling the humidity measuring device to a cooling temperature;
• after the cooling, during a dead time in which no water molecules pass through the protective layer to the humidity sensor and there is no change in signal from the humidity sensor, continuously determining measured temperature values and measured humidity values until a constant measured humidity value is achieved after a specific period at the cooling temperature once cooling has occurred and the dead time has elapsed;
• and
• correcting the measured humidity values with regard to influences that are not due to a change in humidity content in the surrounding medium.