28 Operations Manual
Sensitivity Reports
ZAS-1 Sensitivity Report
Refer to the figure below for a sample IRC-3 / ZAS-1 sensitivity
report.
• The header information at the top of the report indicates the address
of the specific panel tested, along with the time and date of the test.
• The Operation Level Table appears on all reports, listing allowable
system devices, their respective device type number, and device
sensitivity ranges.
Example:
A type 01 device is a Photoelectric (Photo) smoke detector. The
normal sensitivity range for a photoelectric smoke detector is shown
to be between 520 and 1400. If this detector reports a level below
400, it is considered to be in a trouble condition.
Both ionization and photoelectric smoke detectors cause the system
to indicate a “Sensor Alert” when the sensitivity level reaches 1550.
A sensor alert indicates that the device in question needs servicing
in order to prevent unwarranted alarms.
Smoke detectors are provided with four alarm sensitivity levels.
Level 1 (Lev 1) is the most sensitive setting, progressing to level 4
(Lev 4) which is the least sensitive setting. All sensitivity levels are
within allowable UL-286 parameters. The alarm point for
traditional 2-wire and contact device zones is at level 1 (Lev 1).
Note: Device sensitivity is measured in relative units, having no
direct relationship to smoke obscuration.
• The Verification (Verf.) Count indicates the number of times an
analog sensor alarm monitor module has gone into the verification
mode, but not generated an alarm. This information is useful in
determining proper sensitivity settings or inappropriate detector
application. The maximum verification count is 16. RZB zone
verification is a hardware function, and does not appear on this
report.
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