KROHNE OPTIWAVE 400 Series Supplementary Instructions Manual page 20

OPERATION
3
Error conditions related to the measured process
Status type Error message
F
S
M
M
Table 3-2: Error conditions that can cause a temporary failure current
1 If the device detects a "Empty spectrum invalid" error, then it supplies a permanent failure current value in SIL mode.
But it is permitted to change the failure current of this error condition and set it to a temporary failure current value.
If you want to change this value, go to menu C7.3.2 Error-Mapping and refer to the "Function description" section in
the handbook (document [N1]).
For more data, refer to the "Status messages and diagnostic data" section in the handbook
(document [N1]).
20
Description
Sensor
No Signal There is no signal from the
antenna or the antenna signal is
too weak for a long time.
Sensor
Strong Signal The signal amplitude is too large.
It is possible that the signal is
saturated.
Peak Lost No signal peak was found in the
(Level Lost) Search Window for a long time
(>20 s).
Overfill The signal peak is in the blocking
distance (refer to menu item C1.5
Blocking Distance). There is a
risk that the tank is too full.
Sensor
Weak Signal The signal amplitude is too small. -
Bad Measurement The measurement value is
Quality (Old incorrect and does not change for
Measurement) more than 10 s.
Empty Spectrum The empty spectrum recording
invalid does not agree with the process
conditions at this time (e.g. the
tank height was changed).
Sensor Information
Bad Spectrum There is a large change in signal
Quality strength.
Peak Lost in Tank The signal was lost near the tank
Bottom bottom. Spherical or conical
tanks can cause the device to
show this status message.
www.krohne.com
OPTIWAVE X400 / X500
Corrective actions
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10/2020 - 4008265401 - AD SIL OPTIWAVE x4-x500 R01a en