We do suggest that the cover be removed on a yearly or as-needed basis to blow any dust out of the unit and screen. Remove the sensor unit before cleaning, and replace it after cleaning. Minimize contact with the RH sensor during this procedure. For both the RH and temperature sensors, a simple one-point calibration is normally sufficient, and yearly sensor calibration is accepted practice for many disciplines. We suggest you consult professional organizations within your discipline if you have questions as to calibration timeframes.
Additional information is presented in the manual.
Each ID can be assigned a unique name. Typically a descriptive name which identifies the location is used. All email alerts carry this identifier. Yes, you can access your ID from anywhere in the world with Internet access and your personal password. You can operate the ID from any device that can send and receive e-mail or has telnet ability.