Operating Instructions
MS-9050UD Series PN 52413:D 12/15/08 169
Pressing 3 while viewing Print Screen #1 allows the user to print the detector data for each
addressable smoke detector connected to the system. A printout, similar to the following example,
will be generated if an optional printer is connected to the FACP.
Chamber Value
The Chamber value should be within the indicated range for the following smoke detectors:
• SD350(T), SD355(T), D350P(R), SD300(T), AD350 and AD355 Addressable Photoelectric
Smoke Detectors: 405 - 2100 (obscuration of 1.00%/ft to 3.66%/ft.)
• CP350, CP355 and CP300 Addressable Ionization Smoke Detectors: 750 - 2100 (obscuration
of 0.50%/ft. to 1.44%/ft.)
If the addressable smoke detector’s Chamber reading is not within the acceptable range, clean the
detector and check the Chamber value again. If the reading is still not within the acceptable range,
immediately replace the detector.
Drift Compensation
Drift compensation uses software algorithms that identify and compensate for long-term changes in
the data readings from each addressable smoke detector. These long-term changes in detector data
readings are typically caused by dirt and dust accumulation inside the smoke chamber. Drift
compensation performs the following functions:
• Samples each photoelectric smoke detector every 6 seconds and each ionization smoke
detector every 3 seconds
• Allows a smoke detector to retain its original ability to detect actual smoke and resist false
alarms, even as dirt and dust accumulate
• Reduces maintenance requirements by allowing the control panel to automatically perform
the periodic sensitivity measurements required by NFPA Standard 72
The FACP software also provides filters to remove transient noise signals, usually caused by
electrical interference.
DEVICE# DEVICE TYPE %DRIFT COMP CHAMBER TIME/DATE
1D001 SMOKE (PHOTO) 20 1281 12:01AM 01-08-2001
1D002 SMOKE (PHOTO) 20 1281 12:01AM 01-08-2001
1D003 SMOKE (PHOTO) 21 1259 12:01AM 01-08-2001
1D004 SMOKE (PHOTO) 20 1309 12:02AM 01-08-2001
1D005 SMOKE (PHOTO) 21 1281 12:02AM 01-08-2001
1D006 SMOKE (PHOTO) 20 1322 12:02AM 01-08-2001
1D007 SMOKE (PHOTO) 20 1280 12:02AM 01-08-2001
1D008 SMOKE (PHOTO) 20 1215 12:02AM 01-08-2001
1D009 SMOKE (PHOTO) 20 1310 12:02AM 01-08-2001
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