Found some information on PR System One Humidifier settings

I did some searching to try and find out what the different settings on the PR System One Humidifier actually do other than get warmer as you turn the settings up. I came across a PDF document from Philips that sheds a bit more light...

http://www.spiropharma.dk/uploads/REMst ... fugter.pdf

In short, the settings from 1-5 correlate to target relative humidity goals:

Setting 5 = Target Range 80%-90% RH

Setting 4 = Target Range 70%-80% RH

Setting 3 = Target Range 60%-70% RH

Setting 2 = Target Range 50%-60% RH

Setting 1 = Target Range 40%-50% RH

This would probably explain why the past couple of mornings when I went to clean the humidifier tank the plate was cool. I have been using a setting of two and we have had quite a bit of rain. The RH according to the local weather was reported to be 76%. Since the target for setting 2 is 50%-60%, there was no need for the humidifier plate to come on.