Siemens Cerberus DOT1151A-Ex Technical Description page 9

Note: all values are approximative !
Smoke sensitivity: To simplify the comparison of smoke sensitivities between the
parameter sets, we are specifying an AlgoRex smoke sensitivity index for danger level 3.
Please note, that this index is a relative figure, where "2" means an increased sensitivity by
a factor of 2 (compared to the parameter set with index "1"); therefore the detector will alarm
at half the smoke density if measured in the CEN smoke tunnel acc. to EN54.
An AlgoRex smoke sens. Index of "0" means "no alarm with smoke only".
Important: The parameter sets APS083S, APS084S and APS080SH must only be ap-
plied for special applications!
APS080: Caution, low security against false alarm! Parameter set with very high sensitivity
and extreme fast reaction time.
APS083: In mode "present", detection of smoke without temperature rise will not lead to a
danger level 3. This behaviour is outside the standard EN54–7; in mode "absent", EN54–7
is fulfilled.
APS084: This parameter set prevents nuisance alarms due to short and single nuisance
signals. Long or multiple events may lead to danger level 3.
1)
The detector DOT1151-Ex with APS080SH can have a slightly lower electromagnetic
compatibility (APS081S passed EMC tests in the meantime).
2)
Not available for temporary change of detector parameter set on CT/CI due to further
risks in application.
3)
IMPORTANT NOTE regarding APS083 and APS084 (see info MI290):
Unfortunately there has been a mistaken parameter value in detector DOT1151A Index
"ke"; however, this mistake only affects behaviour in parameter sets 083/084. As a result,
the detector may not be able to go into alarm on reasonable smoke density!
--> You must never choose APS083 or APS084 with a detector DOT1151A with Index "ke"!
As a simple rule of thumb, only use APS083 or APS084 with detectors DOT115x with
Technical Index "_f" or later.
Detectors DOT1151A-Ex are not concerned by this fault.
The Index is shown on the detector label as two letters following the part number (e.g.
DOT1151A: "P/N 486695 ke"); first letter means "Schematic Index", second letter means
"Technical Index". Both are in alphabetical order.