Troubleshooting Prosonic T
38 Endress+Hauser
7.2 Application errors
Error Example Elimination
Measured value (00) is
incorrect but measured
distance (008) is correct
L00-FMU30xxx-19-00-00-en-019
1. Check empty calibration (005) and
full calibration (006).
2. Check linearisation
– level/ullage (040)
– max. scale(046)
– diameter vessel(047)
– linearisation table
Measured value (000) and
measured distance (008)
are incorrect
1. For measurements in bypass or stilling well:
Select the according option in the "tank shape" (002) function.
2. Carry out interference echo suppression.
No change in
measured value on filling/
emptying
L00-FMU30xxx-19-00-00-en-014
1. Carry out interference echo suppression.
2. Clean sensor if necessary
3. If necessary, select better installation position
4. If necessary due to wide interference echoes, set function "detection
window" (0A7) to "off".
With an uneven surface
(e.g. filling, emptying,
running agitator) the
measured value
may jump sporadically to
higher
levels
L00-FMU30xxx-19-00-00-en-015
L00-FMU30xxx-19-00-00-en-016
1. Carry out interference echo suppression
2. Set the process cond. (004) to "calm surface" or "add. agitator"
3. Increase output damping (058).
4. If necessary, select a different installation position and/or a larger sensor
On filling/emptying the
measured value drops
L00-FMU30xxx-19-00-00-en-017
1. Check tank shape (002), e.g. "dome ceiling" or "horizontal cyl."
2. If possible, do not select a central installation position
3. Possible user stilling well/echo guide pipe
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