Commissioning; Analogue Values - Apollo 55000-268 Installation Manual

COMMISSIONING

Analogue values

The beam detector returns a pre-set analogue
value corresponding to its status. These values
are defi ned in Table 4 below.
Analogue value
Table 4
The beam detector may return a pre-alarm
value before a full alarm condition occurs. The
analogue value depends on the smoke density
and the set obscuration level (described on page
7) as shown in Table 5.
Analogue value returned
Table 5
0 Microprocessor fault
1 Sensor fault
2 Prism (refl ector) targeting mode
3 Alignment mode
4 General fault warning
5 'Signal High' fault
6 Contamination compensation limit reached
20 Alignment drift negative
25 Detector normal
30 Alignment drift positive
32 Contamination compensation level low (40%)
33 Contamination compensation level medium (60%)
34 Contamination compensation level high (80%)
45–54 Pre–Alarm values (see Table 5 below)
64 Alarm
45
46
47
48
49
50
51
52
53
54
Percentage of obscuration indicated by pre-alarm
Signifi cance
Actual obscuration at set
obscuration level of
25% 35%
16 23
16 26
17 27
18 28
19 29
20 30
21 31
22 32
23 33
24 34
17
50%
33
34
35
36
38
40
42
44
46
48