Wohler HBF 420 Bedienungsanleitung Seite 53

The Wöhler HBF 420 will establish a mean level of moisture which is calculated from
the water content of various penetrated layers and provide a reading in digits on the
display.
If the material code has been correctly selected taking the bulk density into considera-
tion, the following values can be used as an indicator for orientation purposes based on
a normal drying process of mineral construction material.
1. Indicated value 0.0 ... 5.0:
2. Indicated value 5.1 ... 9.9:
3. Indicated value 10.0 and higher
NOTE!
Amongst other factors, the following should be observed:
The measurement result can be distorted by underground metal (electrical cables,
structural steel, etc.)
The material should have a sufficient thickness to accommodate the penetration depth.
Water is generally not distributed evenly in building materials; therefore measurements
should be taken at several different points and, if necessary, weighted mean values
determined.
dry
normal
moist
Measuring
EN
53