How to Measure 
Remove the Transport Protection Cap 
Remove the yellow transport protection cap from the 
probe when taking the meter into use. 
Measure in a Stable Environment 
If the measurement conditions are changing, you cannot 
get a reliable measurement result. Do not measure near 
heat sources, air conditioning, open doors, or windows. 
 
For best results, leave the meter on in the 
measurement area and come back to check it 
later. 
Avoid Temperature Differences 
Temperature differences are a typical cause of error in 
humidity measurement and calibration. You must let the 
meter stabilize long enough: temperature differences 
level out very slowly. 
 
 
Switch to the Graph view and 
wait until the graphs level out, 
indicating that the 
measurement is now stable.