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Reference Manual
00809-0100-4140, Rev AA
January 2017
Configuring Power Advisory (LOI)
This function is not available on the Local Operator Interface.
5.7
Frequency profiling functions
There are two frequency profiling functions supported on a level detector with the
Extended Features Package (EFP) enabled:
Minimum deviation
Maximum deviation
Both functions monitor the sensor frequency change for a defined time duration. An alert is
generated whenever the maximum frequency variation is smaller or larger than the pre-set
thresholds (minimum deviation duration or maximum deviation duration as applicable).
Figure 5-4. Frequency Profile Definition
Minimum Deviation - The smallest change in Sensor Frequency that must occur during the Minimum Deviation
Duration in order to prevent an alert from being generated.
Minimum Deviation Duration - the period of time in which the Sensor Frequency must change by more than the
Minimum Deviation in order to prevent an alert from being generated.
Maximum Deviation - The change in Sensor Frequency occurring during the Maximum Deviation Duration that will
cause an alert to be generated.
Maximum Deviation Duration - the period of time during which a change in the Sensor Frequency greater than the
Maximum Deviation will cause an alert to be generated.
Fast Keys
2, 2, 8
Summary of Contents for Rosemount 2140
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