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17
Functions / Services / Features
Some Functions / Services / Features require programming via EBLWin, see chapter "PC
software (S/W)", page 12. For more information see also FT1020G3 Operation Manual.
How to connect the PC and for more information, see chapter "Download SSD" page 162,
"A Fault message for an alarm point, zone or zone line input will also show the text
message.
Download software (System Firmware)" page 164.
Notes: The information in the following chapters 17.1 - 17.7 is valid for the analogue
smoke detectors 430x / 440x in NORMAL mode.
Chapter 17.15 is valid for the analogue heat detectors 3308 / 3309 in NORMAL mode.
For the analogue detectors 440x in Advanced mode, see chapter "Advanced mode" page
131
17.1
Sensor value
An Analogue smoke detector is like a "sensor". It detects its environment at all times. Each
detected Analogue value is converted in the detector to a digital "sensor value", which is
continuously picked up and evaluated by FT1020G3 for each individual detector. In Figure
36, the (digital) sensor values (during a certain time) are represented by the graph
"Working level".
17.2
Week average sensor value
Each hour, one sensor value is stored in a special memory (in FT1020G3) and each week,
these stored sensor values are used to calculate a "week average sensor value".
is done for each Analogue smoke detector individually. In Figure 36, the (digital) week
average sensor values (during a certain time) are represented by the graph "
sensor value
Each Analogue smoke detector has a default sensor value = 0.1%/m and a week average
sensor value = 0.1%/m (i.e. at Time = 0).
A "fire alarm offset" (value) is added to the week average sensor value to get each
detector's "Fire alarm level", i.e. the fire alarm level will be adjusted in relation to each new
week average sensor value in order to keep the detector's fire alarm sensitivity constant.
The fire alarm level is in Figure 36 represented by the graph "
with the graph "
In Figure 36 (at Time = 0):
The week average sensor value (B) is 0.1 %/m and the fire alarm offset is 3 %/m, i.e. the
fire alarm level (C) is 0.1+3=3.1 %/m.
Service signal will be given when the week average sensor value for a detector has
reached the service signal level (1.8 %/m), i.e. the detector is "dirty" and has to be replaced.
See "
Service level
%/m, i.e. the detector will be more sensitive until it is replaced with a new one.
"Sensor Information" is available via menu H4/U4. Via EBLWin and a PC connected to
FT1020G3 you can also get "Sensor Information" for all Analogue detectors on a COM loop
or an individual detector. For an individual detector you can also get continuous information.
119
The week average sensor value will be calculated within 2½ minutes after any restart, i.e. also after SSD download. During
these "2½ min." all analogue smoke detector fire alarms are suppressed.
" (B).
Week average sensor value
" (D) in Figure 36. The week average sensor value will now stay on 1.8
102
Technical/Programming Manual
Fire alarm level
" (B).
FT1020G3 Rev 2.2.1
119
This
Week average
" (C) - parallel
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