System Sensor BEAM1224A Installation And Maintenance Instructions Manual page 11

In addition to the four standard sensitivity selections the detec-
tor has two Acclimate settings. When either of these settings is
chosen t he d etector w ill a utomatically a djust i ts s ensitivity u sing
advanced software algorithms to select the optimum sensitiv-
ity for the environment. The sensitivity will be continuously
adjusted within the ranges specified in the chart above.
Sensitivity
Total obscuration can be converted to percent per foot,
assuming uniform smoke density for the entire length of
the beam. The chart below converts total obscuration to
percent per foot for all acceptable sensitivity settings.
Sensitivity in %/Ft. vs. Distance
(assumes uniform smoke distr ibution)
2.0
30% Setting
1.5
40% Setting
1.0
0.5
25% Setting
0.0
0 50 100
Distance in Feet
Sensitivity Testing
NOTE: B efore testing, notify the proper authorities that the
smoke detector system is undergoing maintenance,
and therefore the system will be temporarily out
of service. Disable the zone or system undergoing
maintenance to prevent unwanted alarms.
Detectors must be tested after installation and following
periodic maintenance. The sensitivity of the BEAM1224A/
BEAM1224SA may be tested as follows:
NOTE: B efore testing the detector, check for the presence
of the flashing green LED at the receiver, making
sure not to disturb or block the beam. If it does not
flash and the detector is not in trouble or alarm,
power has been lost to the detector (check the wir-
ing).
A. Calibrated Test Filter
The sensitivity of the detector can be tested using an
opaque material to cover the reflector by an amount indi-
cated by the graduated scale on the reflector. (Due to the
high optical efficiency of the reflector the selection of the
opaque material used to block the reflector is not critical.
Acceptable materials include, but aren't limited to, this
manual or the cardboard packaging inserts.)
Refer to Figure 14 for this procedure.
D400-73-00
50% Setting
150 200 250 300
1. V erify the sensitivity setting of the detector in % obscura-
tion. See the Sensitivity Selection section of this manual
for sensitivity determination if sensitivity is unknown.
2. P lace the blocking material over the reflector, lining it
up with the graduated marks that are 10 less than the
detector's setting in percent obscuration. The detector
should not alarm or fault. Keep the material in place for
a minimum of 1 minute.
3. P lace the blocking material over the reflector lining it
up with the graduated marks that are 10 more than the
detectors setting in percent obscuration. The detector
should enter alarm within 1 minute.
Figure 14. Reflector Test Card Procedure
350
C0268-00
4. T he detector can be reset with the reset switch on the
detector unit, remote reset, or momentarily interrupting
power.
5. N otify the proper authorities that the system is back on
line.
If the detector fails this test several steps should be taken
to determine if the detector is faulty or simply needs to be
re-adjusted before returning the unit. These steps include:
1. V erify all wiring connections and appropriate power is
applied to the detector.
2. V erify that the optical line of sight is free from obstruc-
tions and reflective objects.
11
LINE UP EDGE OF
TEST CARD WITH
APPROPRIATE
OBSCURATION LEVEL
MOVE TEST CARD
TO DESIRED AMOUNT
OF OBSCURATION
I56-2541-00R
C0267-00