User Manual

Page 10 of 40 FIREli nk - 25 – Installation Manual

9-5-0-344/ISS4/OCT10

2.2 Alarm Level s and Delays Tab

2.2.1 Alarm Levels - (Level subgroup)

The v alue set i n the Fi r e, Pr e-Al arm and Aux functions in the Level subgroup is the r elativ ely scaled

bargraph level at which the appr opr iate alarm is initiated on the det ec tor. The Fi r e 2 lev el assigns an

absolut ely scaled alarm level in % obs/m.

The A ux lev el is set by f ac tory default at lev el 10 whic h m eans that this al arm will occur after the Fire

alarm. The default level settings for P r e-Alarm and Fire 1 ar e 6 and 8 r espect ively. T he default setting for

Fire 2 is 20% obs/ m.

2.2.2 Alarm Delays - (Delay subgroup)

The alarm delay is the number of seconds that an alarm lev el has to be continuously sensed bef or e the

alarm i s i nitiated. Each alarm level has a programm able delay of between 0 and 90 seconds. T he default

delay for each alarm level is 5 sec onds.

2.2.3 ClassiFire® Override

This functi on has no cur r ent use on the FIRElink - 25 but is reserved for future expansi on pur pose s.

2.2.4 Alarm Factor

The detector sensitivity is set with this ent r y , which will also affec t t he pr obability of nuisance alarms. 0 =

high sensitivity, hi gher pr obability, 8 = low sensit ivit y, lower probability. The default alarm factor is 4.

Note: The hi ghest sensit ivity set ting is suitable for cl ean, environmentally controlled environments, e. g.

semiconduct or manuf acturing clean r ooms where airbor ne poll utant s are kept to an absolute

minimum and the least contamination is cause for al arm.

Use of this setting in a busy machine shop would l ead to relativ ely frequent nuisance alarms due

to t he normal v ari ation of atmospheric contaminat ion and a l ower sensitiv ity setting is

recom mended. It is therefore important t hat t he alarm factor chosen is suit able for the ar ea to be

prot ec ted. When t he appr opr iate alarm factor for the protec ted area has been set, nuisance

alarms will be r educ ed to an absol ute m inimum .

The following tabl e giv es suggested settings of ClassiF ir e alarm setting for different locations:

0 Extremely High Onc e per y ear Semiconduct or manuf ac turing clean room

1 Onc e per 5 y ear s Com puter room

2 Onc e per 10 y ear s Non-sm ok ing office

3 Once per 50 years Clean factory

4 Medium Onc e per 1000 y ear s Warehouse

5 Medium Onc e per 5000 y ear s Warehouse with diesel tr uc k s operat ing

6 Medium Onc e per 10000 y ear s Warehouse with diesel tr uc k s operat ing

7 Low Onc e per 20000 y ear s Warehouse with diesel tr uc k s operat ing

8 Low Onc e per 100000 y ear s Warehouse with diesel tr uc k s operat ing

Alarm

Factor

Sensitivity

Pr oba b ility of

Nui sance Alarm

Sug gested Protected Area