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Operating Instructions
Maintenance Level
Low Chamber Value
Maintenance Alert
Maintenance Urgent
READ STATUS
1=SERVICE TERMINAL
2=PRINT
3=TIME-DATE
Read Status Screen #5
170
Maintenance Alert
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 alert. Table 4.1 summarizes the three levels of maintenance
alert:
FACP Status Displays
INVREP
DIRTY1
DIRTY2
Table 4.1 Maintenance Alert Levels
Figure 4.1 illustrates a graphic representation of the maintenance levels:
Maintenance
Urgent
Low Chamber
Reading
Figure 4.1 Diagram of Maintenance Levels
4.22.15 Time-Date
The operator can view the daylight savings time and the month and week when daylight savings
time will begin and end. Pressing 3 while viewing Read Status Screen #5 will display the following
screens:
ENABLED
START MONTH
START WEEK
END MONTH
END WEEK
Indicates
A hardware problem in the detector
Dust accumulation that is near but below the
allowed limit. DIRTY 1 indicates the need for
maintenance before the performance of the detector
is compromised
Dust accumulation above the allowed limit.
DIRTY
Acceptable
Range
LOW
VALUE
DAYLIGHT SAVINGS
WEEK 2
DAYLIGHT SAVINGS
WEEK 1
Maintenance
Alert
YES
MAR
NOV
MS-9050UD PN 52413:C 01/23/08
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