Endress+Hauser Solitrend MMP42, Brief Operating Instructions

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Solitrend MMP42 Diagnostics and troubleshooting
Hauser 25
A
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 14 Example: "Concentration of material"
In addition, in the case of non-homogeneous material flow it is possible to use the filter
functions, with upper and lower limits, that are implemented in the sensor to filter out "wrong"
measured values.
9.2 Difference between measured moisture value and laboratory
value too large during initial commissioning
The sensor is delivered pre-calibrated with calibration set B and Cal14 (air/water 0 to 100 %)
as standard.
The sensor can be fine-adjusted in a variety of ways to an accuracy of +/-0.1 % in relation to
the laboratory value.
• Depending on the PLC, it is possible to perform a parallel shift/offset in the PLC. The
parameter has different names depending on the PLC (e.g. initial load, zero point, offset,
measuring range, etc.).
Please contact the PLC manufacturer for more information.
• With the remote display, a fine adjustment or parallel shift in the sensor can be performed
using the "Offset" parameter.
If the moisture value displayed by the sensor deviates from the laboratory value by more
than +/-1 % during initial commissioning, this can be caused by the following:
• The sensor is not correctly installed in the material flow. The sensor surface must be
covered sufficiently. Good and stable material flow must be ensured. A video of the material
flow during the batch process can be helpful for analysis purposes.
• The wrong calibration curve is configured in the sensor. The sensor is delivered with
calibration curve Cal14 (air/water 0 to 100 %).
• Incorrect moisture scaling is configured in the PLC. In the sensor, 0 to 20 % moisture
corresponds to the 0 to 20 mA or 4 to 20 mA current output. The 0 to 20 % moisture
scaling must also be entered in the PLC.
Please contact the PLC manufacturer for more information.