5.2.2 For an S2000-IPDL in field two types of verification are required: the full-range
verification of detector’s operability with affecting the optical beam and the routine verification
of sending the polling loop controller the messages about testing, fire, and trouble. The first
testing should be performed after any actions with the transceiver when its position was
changed, including, of course, commissioning. Also, when it is reasonable this verification
should be done after removing dust and debris from the lens and in case of changes in
building structure configuration which can essentially affect the situation with interfering
reflections. The second test shall be performed in all other situations when verification of the
operability of the fire alarm system is required.
4.2.2 Full-Range Verification
4.2.2.1 The full-range verification of the detector’s operability is performed as per classic
inspection procedure for single-ended detectors, i.e. affecting the received signal level is
carried out by partial or full obscuration of the reflector. Reflectors of all types incorporate a
scale showing the percentage of the obscuration for the reflecting surface and, moreover, L-
Type reflectors are equipped with an additional scale (at their lower edges) which is to be
used when the reflectors are arranged with two ones in a row.
4.2.2.2 Since the S2000-IPDL is a single-ended detector and optical beam crosses the
monitored area twice then for simulating the beam degradation by a required value the
percentage of obscuration should be more than the verified alarm threshold. Table
2
represents the required percentage of obscuration of the reflective surface in order to verify
various alarm thresholds.
Table 2
Alarm Threshold
Degradation of Beam
Recommended Obscuration
To Check Non-Activation
To Check Activation
10% (0.5 dB)
19%
10%
30%
15% (0.7 dB)
28%
20%
40%
20% (1 dB)
36%
25%
45%
25% (1.3 dB)
44%
35%
55%
30% (1.6 dB)
51%
40%
60%
35% (1.9 dB)
58%
50%
70%
40% (2.2 dB)
64%
55%
75%
50% (3 dB)
75%
65%
85%
To simulate the Trouble-Beam mode, block all the area of reflective surface of the
retroreflector.
4.2.2.3 In premises where interfering reflections are highly probable (with irregular
configuration of structures beneath the ceiling) presence of these reflections can cause to
actual alarm threshold being just over the set value, and this should be taken into account
both while selecting the sensitivity value for the detector (by using DIP switches) and while
carrying out the full-range testing.