Vaisala HM44 - Manual (Page 16)

User's Guide _______________________________________________________________________
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slab until it corresponds to readings measured at the depth of approximately 20% of the slab.
In concrete slabs drying in one direction only, the humidity is highest at the bottom. After
coating, the humidity spreads evenly throughout the slab until it corresponds to readings
measured at the depth of approximately 40% of the slab.
Figure 5.1 Humidity profile before and after the coating
DRYING IN ONE DIRECTION
0.4xd
d
hole for the
plastic tube
humidity profile
BEFORE COATING
0.4xd
d
humidity profile
hole for the
plastic tube
coating
AFTER COATING
DRYING IN TWO DIRECTIONS
0.2xd
hole for the
plastic tube
concrete slab
humidity profile
d
BEFORE COATING
0.2xd
d
AFTER COATING
hole for the
plastic tube
coating
humidity profile
concrete slab
concrete slab
concrete slab