SICK LFP CUBIC, Operating Instructions Manual

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O P E R AT I N G I N S T R U C T I O N S | L F P C U B I C 8019918/ZJA6 / 2017-07-20 | S I C K A G
Subject to change without notice
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11 TROUBLESHOOTING
11.3 Outputs
Error Cause Possible solution
Switching output
does not behave as
expected
Configuration incorrect. Perform configuration of the switching output
(See “8.2 Configuring the switching outputs” ).
An error is pending; the sensor outputs are in
a safe state.
Remove the cause of the error.
Cable break. Check the cable.
Analog output does
not behave as
expected
Configuration incorrect. Configure the analog output
(See “8.3 Configure the analog output” ).
An error is pending; the sensor outputs are in
a safe state.
Remove the cause of the error.
Cable break. Check the cable.
11.4 Error behavior
Error Cause Possible solution
After installation, the sensor indicates
a high level although the tank is empty.
AutCal not performed. Perform commissioning
(see “7 Commissioning” ).
When used with a coaxial tube,
the sensor indicates a high level al-
though the tank is empty.
AutCal not performed. Perform commissioning
(see “7 Commissioning” ).
Level value fluctuates on the display. Medium surface unsettled. Activate filtering (see “7.1 Quick com-
missioning (with factory settings)” ).
The displayed level value/SPx/RPx/FHx/
FLx/QALOW/QAHIGH is greater than the
probe length.
An offset was configured for the level
value.
Adjust the offset
(see “8.4.13 Setting the offset” ).
Incorrect probe length configured. Adjust the probe length
(see “8.4.7 Configuring the probe
length” ).
Level occasionally jumps to a higher
value.
Contamination in the vicinity of the
process connection.
Cleaning.
Spray ball or supply system wets the
probe with medium above the medium
surface.
Observe the installation conditions
Configure the MaxCoL plausibility filter
(see “8.4.2 Filtering measured values” ).
Change in the ambient conditions
regarding the situation during the AutCal
process.
Perform commissioning again
(See
“7 Commissioning” ).
Significant buildup of foam. Perform foam commissioning
(See
“7.3 Foam commissioning (with
factory settings)” ).
TrsHld set too low, the echo algorithm
detects interference reflections.
Increase TrsHld.
Level occasionally jumps to 0 mm. TrsHld set too high. Perform advanced commissioning
(See
“7 Commissioning” ).
Significant buildup of foam. Perform foam commissioning.
No measurement of low levels for media
with low DKs.
Increased inactive range at the probe
end for media with a low DK.
Increased measurement inaccuracy. Use of foam algorithm.