Chapter 6: Preventive maintenance and testing
EST3X Technical Reference Manual 153
Modules
Inspect Signature modules to ensure the physical installation is secure. Regularly
perform functional testing of the module, as required by the AHJ.
Signature detector cleaning procedures
There are two cleaning procedures: one for SIGA detectors and one for SIGA2
detectors.
Note: Disable the detector before cleaning it, in order to avoid false alarms.
Cleaning SIGA detectors
SIGA detectors require using a conventional vacuum cleaner equipped with the
detector cleaning tool from the Signature Series Tool Kit (P/N SIGA-ST). Install
the tool on the end of the suction hose (nominal 1.5 in. (3.8 cm) ID). This creates
a high velocity vortex scrubbing action around the detector to remove loose dust
and debris.
Note: Without using the detector cleaning tool, it is not possible to verify the
dirtiness levels after cleaning. If the cleaning tool is not used, clean the detector
per instructions below, operate the detectors for a minimum of two hours, and
then restart the loop controller. When cleaned properly, the maintenance
indicators return to normal condition.
To clean SIGA detectors:
1. Disable the detector to prevent false alarms (see “Disabling and enabling
devices” on page 56).
2. Use the conventional vacuum cleaner brush attachment to remove any visible
dirt and debris from the immediate area of the detector.
3. Connect the detector cleaning tool to the vacuum hose. See Figure 42 on
page 154.
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 (see
“Disabling and enabling devices” on page 56).
6. Run the detector sensitivity report to print a list of detector sensitivity and
compensation readings and to verify the effectiveness of the cleaning.
To Next Page
Loading...
