Table of Contents
Advertisement
25.4.1
Explanation to the Sensor Values
Momentary: Momentary value in this menu will be updated after every detector polling,
i.e. approximately every 6 seconds.
Weekly in NORMAL Mode: The very first week average sensor value for the 430x and
440x detectors in NORMAL mode is calculated within 2½ minutes after SSD download &
restart. During these 2½ minutes, no fire alarm can be activated and "Weekly: 00.0%/m"
will be shown. The "Weekly" value will thereafter be updated every week.
Weekly in AVANCED Mode: For the 440x detectors in Advanced Mode the "Weekly"
value is 00.0%/m on delivery. It will be updated the first time after 13 minutes. Thereafter,
it will be calculated every 13 minutes but then will only be changed downwards if required.
After 18 hours it can be changed downwards or upwards and after additional 18 hours (36
hours in total) it can be changed downwards or upwards and it is also saved in the
detector's EEPROM, i.e. that value will be used after the power is disconnected from the
detector. The "Weekly" value for the 440x detectors in Advanced Mode is also called the
"Contamination Compensation Value (CCV).
Performance Factor: The Performance factor can be 0.00 – 2.55.
The Performance factor is normally close to 0.00, which means that the detector is mounted
in a "stable" environment. The momentary sensor values during 24 hours do not differ a lot
from the week average sensor value.
In an "unstable" environment, the Performance factor will be higher than 0.00. This could
for example be the case in a factory (e.g. "dirty" activities during working hours – no or
clean activities during the night) and is not a problem as long as there are no nuisance
(false) alarms or other problems.
Algorithm: shows the algorithm currently in use.
Install date: The date is set in the detector when it´s powered up by the loop for the first
time.
Table 19 Algorithms and abbreviations in NORMAL mode
Algorithm – Normal Mode
Detectors 3308/3309, 430x and 440x
Normal sensitivity (3%/m) & Normal detection (15 s), Default
High sensitivity (2.4%/m) & Normal detection (15 s)
Low sensitivity (3.6%/m) & Normal detection (15 s)
Normal sensitivity (3%/m) & Slow detection (35 s)
High sensitivity (2.4%/m) & Slow detection (35 s)
Low sensitivity (3.6%/m) & Slow detection (35 s)
Heat algorithm, Class A1, Default
Heat algorithm, Class A2 (S)
Heat algorithm, Class B (S)
Decision algorithm
Table 20 Algorithms in ADVANCED mode
Algorithm – Advanced Mode
Detector 4400
Normal area, default
Clean area
Cooking-Welding area
Heater area
Smoke-Steam area
130
Operation Manual
FT1020G3 Rev 2.10.4
Abbreviation
N-15
H-15
L-15
N-35
H-35
L-35
A1
A2
B
Dec
Abbreviation
Normal
Clean
Welding
Heater
Smoke
Advertisement
Table of Contents
