UWT NivoRadar NR 7200 Series, Техническая информация/Инструкция по эксплуатации

Страница: 51 / 60

NivoRadar
®
Continuous level measurement
Series NR 7200
Technical information / Instruction manual
Diagnostics and servicing
page 51
Fault description Cause Rectification
Measured value jumps to-
wards 100 %
Level
time 0
Due to the process, the amplitude of
the level echo sinks
A false signal suppression was not car-
ried out Carry out a false signal suppression
Amplitude or position of a false signal
has changed (e.g. condensation, build-
up); false signal suppression no longer
matches actual conditions Determine the reason for the changed
false signals, carry out false signal
suppression, e.g. with condensation.
Liquids: Measurement error during filling
Fault description Cause Rectification
Measured value remains un-
changed during filling
Level
time
0
False signals in the close range too big
or level echo too small
Strong foam or vortex generation
Max. adjustment not correct Eliminate false signals in the close
range
Check measuring point: Antenna
should protrude out of the threaded
mounting socket, possible false ech-
oes through flange socket?
Remove contamination on the antenna
In case of interferences due to instal-
lations in the close range, change
polarisation direction
Create a new false signal suppression
Adapt max. adjustment
Measured value jumps to-
wards 0 % during filling
Level
time 0
The level echo cannot be distinguished
from the false signal at a false signal
position (jumps to multiple echo) In case of interferences due to instal-
lations in the close range: Change
polarisation direction
Chose a more suitable installation po-
sition
Measured value jumps to-
wards 100 % during filling
Level
time 0
Due to strong turbulence and foam
generation during filling, the amplitude
of the level echo sinks. Measured val-
ue jumps to false signal Carry out a false signal suppression
Measured value jumps spo-
radically to 100 % during
filling
Leve
l
time
0
Varying condensation or contamination
on the antenna Carry out a false signal suppression or
increase false signal suppression with
condensation/contamination in the
close range by editing