Diagnostics and troubleshooting
9.5 Treatment of measurement errors
Code
Text message
Cause
Rectification
M511
Inconsistent software
configuration
A software unit requires a software
update
Carry out software update
9.5
Treatment of measurement errors
The tables below give typical examples of application-related measurement errors.
The images in column "
Error description
show the actual level as a dashed line and
the output level as a solid line.
1
Real level
2
Level displayed by the transmitter
Note
If the output level is constant, the cause could also be the fault setting of the current
output to "
Hold value
.
If the level is too low, the reason could be a line resistance that is too high
Fault description
Cause
Rectification
Min./max. adjustment not correct
Adapt min./max. adjustment
Measured value shows a
too low or too high level
Incorrect linearization curve
Adapt linearization curve
Due to the process, the amplitude
of the level echo sinks
A auto false echo suppression was
not carried out
Carry out a auto false echo
suppression
Measured value jumps
towards 100 %
Amplitude or position of a
false signal has changed (e.g.
condensation, buildup); auto
false echo suppression no longer
matches actual conditions
Determine the reason for the
changed false signals, carry out
auto false echo suppression, e.g.
with condensation.
34
SITRANS LR140
Operating Instructions, 08/2020,
A5E50352144
