This is the last reading received from the Transmitter-Sensor. The data interval is 10 minutes, posted to the web every 30 minutes. You cannot change the data interval.
A live data display icon such as:
indicates that the temperature has gone over the threshold value, but the resulting alarm has been acknowledged.
A display such as:
means that there is no live data coming through, but if you move the mouse pointer over the display icon the last recorded temperature value and time will be displayed like this:
The live data display will persist for about 3 hours before switching to 'recent data'.