Endress+Hauser MMP20 SONO Mobil, Руководство по эксплуатации

Страница: 15 / 64

MMP20 SONO-DIS (option D)
Hauser Page 15
For the G-Set parameter, it is therefore necessary to adjust the SONO-WZ once to the type
of rock that is used, which depends on the concrete formulation. To be able to display the
effective (or kiln-dried) water content in the SONO-DIS, it is necessary to factor in a value
for the "G-Set" parameter for the formulation used with the type of rock. This value must
be determined once.
(See also the "Core moisture, core water and absorbed water" chapter).
If the water content SONO-WZ displays for a special concrete is too high, G-Set must be adjusted
for the corresponding number of liters. The exact G-Set value which has to be factored in for the
concrete formulation with the rock type (location) and entered into SONO-DIS can be checked or
determined in two ways:
A) By comparing the SONO-WZ measurements with several correct values for the water content
of the concrete, e.g. by mixing concrete with dry aggregates.
B) By comparing the SONO-WZ measurements with several correct (!) kiln-dried values after
kiln-drying. It is important to take the possible sources of error into consideration during the
kiln-drying process.
The kiln-dry water content is calculated as follows:
Kiln-dried value = effective water + core water + additives that behave like water.
See also the "Core moisture, core water and water absorption" chapter.
Setting and changing the three concrete formulation parameters
8.3.1 "CHANGE" or enter the raw density
Values must first be entered for the configurable parameters before the SONO-DIS can switch to the
measurement mode to measure the water content.
General-Set :
Fine adjustment of the SONO-WZ to the variety of concrete
with the rock type and core water. Entry max. +- 50 liters
Typically: -10 liters (2/3 of core water) which are automati-
cally subtracted during the measurement if the effective wa-
ter content (the effective water) is to be measured.
Raw density D
Characteristics:
Characteristics of the concrete formulation
with 4 possible settings: coarse A (minus cor-
rection), normal B (no correction), fine C (plus
correction), or special U (minus correction for
gap grading).
Note: This parameter is largely influenced by
the mortar content in the concrete.
If the kiln-dry water content is to be
measured with the SONO-WZ, enter
a plus value for the G-Set, with 1/3
of core water!
3. Additives that behave like water are also
measured by the SONO-WZ. This must be taken
into consideration.