Vaisala HMP42 - Manual (Page 10)

HMI41 AND HMP42
Operating Manual
M210317EN-A
6
3.4.2 Example 2: measuring humidity in a concrete floor
Bore a hole and clean it thoroughly so that all drilling dust comes out; blowing
air is a good method for cleaning. However, please, note that if you clean
several holes, you should use a mask to protect yourself against dust. You can
also use a vacuum cleaner. Seal the hole e.g. with tape. Let stabilize (e.g. 24
hours in concrete). Cut the tape, insert the probe in the hole and take
measurements. See photos below for steps 1 - 6.
1. Bore a hole. 2. Clean it. 3. Seal it and let stabilize.
4. Cut the tape. 5. Insert the probe. 6. Take measurements.
Figure 3.4.2 Taking measurements in concrete floors