Berthold DUO XPERT LB 470RID, Руководство по эксплуатации

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LB 470RID Level 7 Main Menu Device Setup
56925-1BA2 Rev.02, 05/2021
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PV Threshold External radiation is detected if the measured
value in the secondary channel deviates from the
measurement channel by the value of PV Thresh-
old. The larger the value, the more unclear the
external radiation is detected. The smaller the
value, the greater the risk of RID faulty activation.
RID Time Constant The RID time constant affects the comparison be-
tween secondary channel and measurement
channel. The RID time constant must be set
smaller than the standard time constant. If the
time is too low, the risk of RID misfiring increases.
RID Limit The RID limit describes the count rate threshold
from RID to XIP. In two scenarios we recommend
to adjust the RID Limit value:
•
for RID measurements using SuperSENS detec-
tors.
•
for existing installations where LB 440 RID is
replaced by LB 470 RID and the recommended
count rate of 30,000 cps is not reached, and
an increase of the count rate is not possible.
For new installations with rod detectors, we rec-
ommend a count rate of at least 30,000 cps to
guarantee a safe RID function.
Min. Weight Minimum weight of the individual measuring
points, which cannot be lower by the daily reduc-
tion (Daily Weight Reduction).
Max. Weight Maximum weight of the measuring point that can
be achieved by frequent learning of this point.
Daily Weight Reduc-
tion This parameter specifies how much the respective
point of the RID table loses weight if it is not
learned again.
Button
<Reset Expert Set-
tings>
Reset the settings under "Expert Settings" to de-
fault values.
Button
<Reset RID Table>
Deletion of all learned points in the RID table. If
the RID table has been deleted and the last cali-
bration is older than about three months, it is
recommended to recalibrate.
NOTICE
If the level measurement is used as a min-level switch, with point source and
point detector, it is recommended that the measurement be carried out approxi-
mately every six months, at least briefly when the container is empty, or with a
level below the limit. This automatically compensates for any changes in sensitiv-
ity due to aging and the function of external radiation detection remains
guaranteed. Similarly, with the maximum level switch, it is recommended that the
fill level be exceeded about the limit value every six months.
Alternatively, you can also recalibrate with an empty and full adjustment.