SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
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Volume 3 Menu Structure
3
6 RS Sigma Displayed only when Response Mode is set to Rapid Switch.
This value is the threshold where the rapid switchover responds.
The higher the value, the higher the threshold and the less likely the
response to interference radiation.
The default value of 10 is suitable for most applications.
With irregular levels, e.g. due to agitators, the interference radia-
tion detection would be triggered constantly due to strong level fluc-
tuations. In these cases, you must set Sigma to a higher value.
2.19 Source Exchange
Menu path: Device Config Setup Signal Condition
Source Exchange.
Often, it is not apparent to the user when a source must be
replaced. Activate the message "Source Exchange" if you want to
be warned in time that the source has to be replaced. Reasons for
a source replacement may be to ensure the measurement function,
or, for radiation protection reasons, a maximum service life of the
source.
To get the warning messages, you have to evaluate the messages
via the HART
®
signal or the digital output.
Usually, the manufacturer recommends a service life of the source
of about 10 years. A longer service life of the source has to be clar-
ified with the Radiation Safety Officer in charge who is familiar with
the local radiation protection requirements.
The service life approved by the Radiation Safety Officer limits the
maximum period of use, even if a longer technical service life is
displayed under Warning Date. In this case, select DATE at
Selection and enter the source exchange date specified by the
Radiation Safety Officer.
1 Selection •OFF
No message is output.
•DATE
The message Source Exchange is output on a specific date.
Enter the date in Warning Date.
• Reading Fluctuation
In Max Reading Fluctuation, enter a maximum fluctuation of
the level reading, which should not be exceeded. After entering
the maximum fluctuation width, the detector automatically cal-
culates the date of the source exchange. The date is displayed
under Date.
2 Warning Date If you have selected DATE at Selection, you have to enter the date
when you want to get the Source Exchange warning (format: MM/
DD/YYYY.
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