| Although the sensor purge is in the automatic mode, it can also be performed manually. |
To check that the sensor purge has been performed to ensure the best possible response times or before calibration, start the purge manually as follows:
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When the sensor purge is completed, the display returns to the basic display automatically. The stabilization of the temperature reading can take a few minutes.
If the dew point is low, automatic autocalibration will take place immediately after the sensor purge. The purge takes up to 5 minutes to complete. During the purge, there are no readings on the display. A message appears on the display every 15 seconds to inform of the time required to complete the purge. The purge icon also appears in the upper left corner of the display.
Figure 1. Sensor purge displays 
You can also change one of the shortcut keys to point to the sensor purge: for instructions, see Programming shortcut keys.