Reference Manual
00809-0100-4801, Rev FA
October 2010
7-15
Rosemount 3051S Series
Threshold Value
If sensitivity is Custom, this field will display the custom sensitivity setting as
% change from the baseline value.
Configure Sensitivity
This button launches a window for entering sensitivity settings.
Alert Delay
This value specifies the amount of delay from when the transmitter detects a
deviation of the sensitivity threshold to generating an alert or alarm. The
default value is 60 seconds and valid range is 0 to 3600 seconds. Increasing
the alert delay helps to avoid false detections resulting from the standard
deviation or CV exceeding the threshold only momentarily.
High Detection Message
Customizable message field related to standard deviation / coefficient of
variation crossing the upper threshold value. This message can be used to
describe the abnormal process condition or provide additional details for
troubleshooting. Message will appear along with the High Variation or High
CV Detected alert. Character limit is 32 including spaces.
Table 7-3. Standard Deviation Sensitivity Choices
Parameter Definition
Low 80% change from baseline value will trip the diagnostic
Medium (default) 60% change from baseline value will trip the diagnostic
High 40% change from baseline value will trip the diagnostic
Custom Adjustable from 1 to 10000%
Table 7-4. Mean Sensitivity Choices
Parameter DP GP/AP
Low 40% of baseline or 4% of span,
whichever is greater
20% of span
Medium (default) 20% of baseline or 2% of span,
whichever is greater
10% of span
High 10% of baseline or 1% of span,
whichever is greater
5% of span
Custom Adjustable from 1 to 10000% of
value
Adjustable from 1 to 10000% of
span
Table 7-5. Coefficient of Variation Sensitivity Choices
Parameter Definition
Low 80% change from baseline value will trip the diagnostic
Medium (default) 40% change from baseline value will trip the diagnostic
High 20% change from baseline value will trip the diagnostic
Custom Adjustable from 1 to 10000%
(12 pages)
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