Field Sensitivity Measurements
The 2098-9207 Long-Range Beam Detector automatically compensates for the effects of component aging and dust or
dirt accumulation on its covers. According to NFPA requirements (NFPA 72E, 1987, Chapter 8), you must measure the
detector’s sensitivity in the field within one year after initial installation and every alternate year thereafter.
To make the sensitivity measurement, use the supplied Installation Test Filters or the 553-509 Beam Detector Test Filter
Kit.
Note:
When using the installation test filters, check the filters for damage or scratches which may impact the accuracy of
the test. If the filter is damaged, do not use.
Caution:
Testing the sensitivity of the detector will cause an alarm condition.
BEFORE TESTING, DISCONNECT CITY,
RELEASING DEVICES AND EXTINGUISHING SYSTEMS. NOTIFY ALL APPROPRIATE PERSONNEL OF TEST.
By placing the appropriate filter in front of the Receiver’s optical module for at least 30 seconds, you can determine the
approximate sensitivity of the installed detector by the detector’s response (alarm or no alarm). See Figure 13 when us-
ing the filters. See Figure 9 for UL sensitivity requirements.
SENSITIVITY CHART WHEN USING INSTALLAnON FILTERS:
DETECTORS
SENSITMTY
ADJUSTMENTSETllNG
DETECTOR’S RESPONSE
TEBT FILTER
MUST NOT MUST
ALARM
ALARM
No Filter
v’
40%
vf
3 ww
No Filter
\I
60% v’
20% 4
5 WJW
60% 4
40%
v’
6 (60%)
60%
4
I i
40%
7 (70%)
d j
60%
I 4
SENSlTlVlTY CHART WHEN USING 553-509 TEST FILTER KIT:
DETECTOR’S
FILTER
DETECTORS RESPONSE
SENSlTlVlTY
ADJUSTMENT SETTING
NUMBER
OBSCURATION MUST NOT MUST
RATING NARM ALARM
1 7% d
2 (20%)
4 40% d
1 7% 4
3 (30%)
5
65%
u’
2 15% 4
4 ww
5 66% d
2 15% *I
5 (50%)
6 65% -4
4 40% 4
6 (60%)
6 65% 4
4 40% d
7 (70%)
6 65% d
Using Filters to Determine Detector’s Sensitivity
FIGURE 13
16
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