Cumulus Support

The dew point calculation doesn't seem to be working on my Cumulus installation.

I've just installed a humidity sensor onto my Instromet station, and outdoor temperature and outdoor humidity readings are both making their way to Cumulus MX from my station - but the dew point doesn't seem right?

Attached image shows Outdoor Temp of 22.1C and Relative Humidity of 42% - which should give Dew Point of about 9C, but instead it is showing 21.6C. I have ticked the "Calculate dew point" option in the settings but doesn't seem to have resolved the issue.

Anyone have any thoughts?

Thanks

Not that I know of, my test station uses that option and it is being correctly calculated. All the stations use the same common calculation routine when that option is enabled.