The psychrometric chart displays several quantities: dry bulb temperature, dew point temperature, wet bulb temperature, humidity ratio, specific enthalpy, specific volume, relative humidity, and water vapor pressure being the top nine. Also, barometric pressure (or equivalently, altitude) is given.
Manual Humidifier Control. Tap Humidifier under the humidity tab to access the humidifier screen. To control your humidifier’s status, tap On/Off. Tap the arrows on the Humidifier Control icon to set the desired indoor humidity level. You should consult the Suggested Indoor Relative Humidity Chart at the bottom of the screen when determining what level to set your relative humidity.
This chart, created by Gwen Spicer, Principal Conservator at Spicer Art Conservation, shows the delicate balance of temperature, relative humidity, and mold growth. Preventing mold in your collection is essential to protecting your artifacts!
Its easy to tell when it's sticky outside: You have to peel yourself off vinyl car seats and plastic lawn furniture, and the laundry you hang on the line never seems to dry. Now you can get a more accurate measure of the mugginess, or relative humidity, by using the following charts and a simple tool called a sling psychrometer that you can make yourself.