Notifier NFS-640 Programming Manual

AWACS Features Appendix C: AWACS™ Applications
NFS-640 Programming Manual P/N 51333:B 10/03/2003 85
A graphic representation of a detector analog reading using drift compensation and smoothing:
Figure 24 Graphic Representation of Drift Compensation
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 AWACS maintenance
warnings:
Table 29 Definitions of AWACS Maintenance Levels
A graphic representation of the maintenance levels:
Figure 25 Diagram 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.
Awacs1a.cdr
Analog
Reading
Alarm Level
with compensation and
smoothing
without compensation
Time
Awacs2a.cdr
Maintenance
Urgent
Maintenance
Alert
Low Chamber
Reading
Acceptable
Range
DIRTY
Low
Value
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Notifier NFS-640 Specifications

General

Humidity	10% to 93% non-condensing
Power Supply	120/240 VAC, 50/60 Hz
Display	80-character LCD
Operating Temperature	0°C to 49°C (32°F to 120°F)
NAC Outputs	4
Power	24 VDC
Communication	RS-485
Weight	Approx. 15 lbs (without batteries)