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MORLEY-IAS
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OMMISSIONING
M
ANUAL
Document No. 996-071, Revision:
1
,
Aug 99
Page
37
11.4 Verification Mode
•
Alarm verification can be used to reduce false alarms by placing a delay on a transient alarm signal received from
a smoke detector. This delay time can be set when commissioning the panel.
•
When an alarm is first received from a smoke detector the panel will start an internal timer and attempt to "reset"
the detector. If the detector is still in alarm after the verification timer has expired the control panel will go into
alarm. If the detector is not in alarm at this point, the panel will enter a 60-second "Confirmation period". Any
alarm received during the confirmation period will then be deemed a genuine fire alarm.
The alarm verification feature should not be used as a substitute for proper detector
location/applications or regular system maintenance. Alarm verification features are
intended to reduce the frequency of false alarms caused by transient conditions. They are
not intended to compensate for installation design errors or lack of maintenance.
Keep the verification delay to a minimum. Use the following maximum times for compliance
with the appropriate standards:-
UL864
40 seconds
EN54
5 seconds
BS5839
5 seconds
11.4.1 Commissioning Verification Mode
•
Press
3
to select Verification mode from the ‘Day Modes Menu. The display will prompt whether the mode is to
be used.
Allow mode ?
•
Press
No
to inhibit the mode and return to the ‘Day Mode’ menu.
•
Press Yes to enable the mode. The display will then prompt the start and end times for the day period.
START at 06:30 ?
•
Press
Yes
to accept and step on. Press
No
to change and then enter the required start time using the number
buttons.
START at 06:30 FINISH at 17:45 ?
•
Press
Yes
to accept and step on. Press
No
to change and then enter the required end time using the number
buttons. The display then prompts how long to delay the alarm.
Verification delay = 0 seconds
•
Enter the desired delay (see above guidelines for maximum times).
When the event log is set to "Normal" the panel will record the high, analogue output signal
from the detector that initiated the verification timer. If the detector is still in alarm at the end
of the verification delay, a fire alarm will be recorded in the log. With the event log in
"Diagnostic" the panel will record all analogue signals received from the detector until the
smoke level drops back to normal.