Endress+Hauser Prosonic M FMU44, Руководство по эксплуатации

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Commissioning Prosonic M FMU44 HART
30 Hauser
NOTICE
If the blocking distance is undershot, this may cause a device malfunction.
‣
Mount the measuring device high enough that the blocking distance is not reached at
the maximum fill level.
‣
Define the safety distance (SD).
‣
If the level enters the safety distance SD, the device generates a warning or alarm.
‣
The measuring span F may not project into the blocking distance BD. Level echoes
within the blocking distance cannot be evaluated due to the transient response of the
sensor.
Full calibration function (006)
Specify the measuring span F (distance from the minimum to the maximum level).
Interference echo suppression (mapping)
Dist./meas.value function (008)
This function displays the measured distance D from the sensor membrane to the surface
of the product together with the level L. Check whether the values displayed match the
actual distance/level.
"Check distance" function (051)
Start the mapping process.
+
+
A
B
A0038449
 26 Example of mapping
A Distance too small
B Distance = Ok
Selection and description
• Distance = ok → the correct distance is displayed
Any echoes closer to the sensor will be suppressed by the subsequent interference echo
suppression (mapping).
• Dist. too small → the displayed distance is too small
In this case, the signal comes from an interference echo and will be suppressed by the
subsequent interference echo suppression.
• Dist. too big → the displayed distance is too big
• The error cannot be rectified by suppressing the interference echo. Two functions that
follow are then skipped.
• Check the application parameters: Tank shape (002) , Medium properties (003),
Process cond. (004) and in the function group Basic setup (00) → Empty calibration
(005)
• Dist. unknown → the actual distance is not known
Two functions that follow are then skipped.
• Manual → you can specify the mapping range yourself in the following function