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Stratos HSSD-2 • INSTALLER’S HANDBOOK • Iss. 12
The following table gives suggested settings of ClassiFire alarm setting for different locations
0 Extremely High Once per year Semiconductor manufacturing clean room
1 Once per 5 years Computer room
2 Once per 10 years Non-smoking office
3 Once per 50 years Clean factory
4 Medium Once per 1000 years Warehouse
5 Medium Once per 5,000 years Warehouse with diesel trucks operating
6 Medium Once per 10,000 years Warehouse with diesel trucks operating
7 Low Once per 20,000 years Warehouse with diesel trucks operating
8 Low Once per 100,000 years Warehouse with diesel trucks operating
Alarm
Factor
Sensitivity
Probability of
Nuisance Alarm
Suggested Protected Area
3.4.3 Alarm delays (Numeric - Address 001-127)
Setup menu > Alarm levels
The alarm delay is the number of seconds that an alarm level has to be continuously
sensed before the alarm is initiated. Each alarm level has a programmable delay of
between 0 and 90 seconds.
3.4.4. ClassiFire
®
override (Numeric - Address 001-127)
Setup menu > Alarm levels
When this function is set to a value other than zero, the shorting together of the “Input
3” contacts on the detector main circuit board by means of volt free contacts will
desensitise the detector by moving the alarm levels out by the specified percentage.
3.4.5. ClassiFire
®
alarm factor (Numeric - Address 001-127)
Setup menu > Alarm levels
The detector sensitivity is set with this entry, which will also affect the probability
of nuisance alarms. 0 = high sensitivity, higher probability, 8 = low sensitivity, lower
probability.
Note: The highest sensitivity setting is suitable for clean, environmentally controlled
environments, e.g. semiconductor manufacturing clean rooms where airborne pollut-
ants are kept to an absolute minimum and the least contamination is cause for alarm.
Use of this setting in a busy machine shop would lead to relatively frequent nuisance
alarms due to the normal variation of atmospheric contamination and a lower sensitiv-
ity setting is recommended. It is therefore important that the alarm factor chosen is
suitable for the area to be protected. When the appropriate alarm factor for the pro-
tected area has been set, nuisance alarms will be reduced to an absolute minimum.
NB
☞
NB ☞
3.4.2 Alarm levels (Numeric - Address 001-127)
Setup menu > Alarm levels
The value set in the Pre Alarm level, Fire 1 level and Aux level functions
in the Alarm levels submenu is the relatively scaled bargraph level at which the
appropriate alarm is initiated on the detector. The Fire 2 level function assigns an
absolutely scaled alarm level in % obs/m to the Fire 2 alarm.
The Aux level is set by factory default at level 10 which means that this alarm
will occur after the Fire 1 alarm.
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