In the graph below, it is possible to display a comparison of one value for two pre-set time periods. The value type and other parameters can be entered using a control form. The basic settings are performed for the temperature last week with the temperature in the same period a year ago.
The Displayed data type option enables you to set whether hourly, daily or monthly average values will be displayed. The displayed period for graphic processing can be selected within a range from 24 hours up to 1 year. If a different value is selected, a length of one week will automatically be entered. Similarly, the interval between the compared periods will be limited by the start and end of measured data saved in the database. If a value higher than the measurement period range is set, the closest period within the start and end of the records in the database will be entered.