Endress+Hauser Solitrend MMP20, Operating Instructions Manual

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Commissioning Solitrend MMP20 (Option D)
16 Hauser
7.5 Configuration and measurement
For the device to be able to display the water content as a kiln-dried value with a required
accuracy of ±1 to 3 l/m 3 , the system must be set beforehand to a specific "concrete
formulation characteristic" and to the rock used. This setting is made using the CHAR and
G-Set parameters.
7.5.1 CHAR parameter for the concrete formulation characteristic
With its radar measuring field, the SWZ probe shows the dependency of the grading curve
on various concrete formulations. Therefore the handheld device offers users 4 different
possible settings, which can be entered as a CHAR parameter.
100
80
60
40
20
0
0 0.125 0.25 0.5 1 2 4 8 16 31.5
%
mm
1
2
3
4
A0040877
 11 The 4 possible CHAR parameters
1 Fine (grading curve C)
2 Normal (grading curve B)
3 Coarse (grading curve A)
4 Special (gap-graded U)
Fine (grading curve C)
The probe measures slightly too little water and therefore has to adjust the water content
upwards slightly
• Concrete with a high mortar content, i.e. a very high quantity of sand, particularly with a
high fines content, a high quantity of cement
• Standard admixtures, standard additives as well as perchloroethylene (PCEs)
Normal (grading curve B)
No or minor correction
• Constant and relatively well-distributed grading curves
• Standard admixtures, standard additives as well as PCEs
Coarse (grading curve A)
The probe measures slightly too much water and therefore has to adjust the water content
downwards slightly
• Concrete with higher k-values and low mortar content
• Concrete with constant and relatively well-distributed B-grading curves with one
peculiarity: low target water content that is less than 160 l/m 3 , and large amounts of
superplasticizers (PCE) which improve general flow characteristics/rheology.