you wrote in the original question that a temperature offset because of pcb-heat will result in a relative humidity value lower than actual.
This results in my question:
If I calculate the absolute humidity (out of temperature with offset and humidity with error) - does it result in the same value as if I calculated the absolute humidity out of correct temperature without offset and correct humidity without error?
This would be the same effect when I have a fixed volume of gas with known temperature and absolute humidity. If I heat this gas, the absolute amount of humidity in this volume of gas will stay the same, while the temperature will increase and the relative humidity will be lower than before.
Am I right and can I use this dependency or are the dependencies and math operations more complex? Or is there a problem, that the gas in my case is not heated but only the sensor?