96 NFS2-640/E Programming Manual — P/N 52742:L2 7/17/14
Intelligent Sensing Applications Features
A graphic representation of a detector analog reading using drift compensation and smoothing:
Figure C.1 Graphic Representation of Drift Compensation
C.2.2 Maintenance Warnings – Three Levels
The software determines when the drift compensation for a detector reaches an unacceptable level
that can compromise detector performance. When a detector reaches an unacceptable level, the
control panel indicates a maintenance warning. The table below summarizes the three levels of
maintenance warnings:
A graphic representation of the maintenance levels:
Figure C.2 Diagram of Maintenance Levels
Awacs1a.wmf
Analog
Reading
Alarm Level
with compensation and
smoothing
without compensation
Time
Table C.1 Definitions of Maintenance Levels
Maintenance Level Indicates
Low Chamber value A hardware problem in the detector.
Maintenance Alert Dust accumulation that is near but below the allowed limit. The
Maintenance Alert level indicates the need for maintenance before
the performance of the detector is compromised.
Maintenance Urgent Dust accumulation above the allowed limit.
Maintenance
Urgent
Maintenance
Alert
Low Chamber
Reading
Acceptable
Range
DIRTY
Low
Value
To Next Page
Loading...
