Endress+Hauser Solitrend MMP42, Brief Operating Instructions

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Solitrend MMP42 Commissioning
Hauser 23
sensors measure approx. 60 picoseconds radar transit time, and 145 picoseconds in dry glass
beads.
Calibration curve set A for general bulk solid applications (e.g. sand, gravel, grit, wood
chips) is available on request.
SD02333M remote display - description of operation and material calibration.
8.3.1 Installation in or at the discharge hopper
With this type of installation, it is important to set the right calibration curve to match the
grain type so that the final moisture is displayed correctly as an absolute moisture value.
If product is continuously discharged and the sensor plate is permanently covered by grain, a
calibration curve with temperature compensation must also be set here.
However, if the product is discharged intermittently in batches and the sensor plate is not
covered most of the time, the integrated temperature sensor would adapt to the air
temperature and not to the grain temperature, which would cause errors in the
measurements.
Therefore, a calibration curve without temperature compensation is the recommended setting
for intermittent discharge.
To precisely measure and display absolute moisture readings at the discharge point, the
calibration curve must be correctly set and fine-adjusted.
Once the device is fine-adjusted for all possible types of grain, these parameters are stored in
the device in the non-volatile memory. If the type of material to be measured is changed, the
user only needs to select the relevant calibration curve during operation, as the influence of
the installation location remains constant and the bulk density within a product is also largely
the same.
Possible settings
• The grain calibration curve can be set depending on the type, as described in Section 8.3.
• Depending on the installation location, a zero point offset correction can be performed for
the selected calibration curve
The use of the remote display is recommended to perform the fine-adjustment. The
device can only be fine-adjusted when it is installed in the system, as the installation
location and the bulk density of the grain has a considerable influence on moisture
measurement.
The fine-adjustment must be performed separately with each type of grain.
Absolute moisture measurement depends on the following parameters:
• Installation location (e.g. metal objects in the field of measurement)
• Bulk density of the material
Another calibration curve must be selected as soon as one of these parameters changes if
you want to display the moisture as an absolute moisture value.