Preventive maintenance
7.6 EST3 Installation and Service Manual
Signature detector cleaning procedure
Signature detectors may be cleaned using a conventional vacuum
cleaner with the detector cleaning tool (P/N SIGA-ST) installed
on the end of the suction hose (nominal 1.5 in. [3.8 cm] ID)
extension tubes. The tool creates a high velocity vortex
scrubbing action around the detector, removing loose dust and
debris which is subsequently drawn into the vacuum.
Note: In order to avoid false alarms, disable the detector being
cleaned before using the detector cleaning tool.
1. Disable the detector to prevent false alarms.
2. Use the conventional vacuum cleaner brush attachment to
remove any visible cobwebs etc. from the immediate area of
the detector.
3. Connect the detector cleaning tool to the suction hose.
4. Place the detector cleaning tool over the detector head for
approximately 10 seconds.
5. After the detector has been cleaned, Restore it to proper
operation.
6. Check the detector’s sensitivity to verify the effectiveness of
the cleaning.
Detector
Cleaning
Tool
Place cleaning tool
over detector.
Connect to vacuum
cleaner hose.
[ACLEAN1.CDR]
Figure 7-1: Detector Cleaning Tool
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