
MORLEY-IAS
ZXa / Zxe
C
OMMISSIONING
M
ANUAL
Page
36
Document No.996-071, Revision:
1
,
Aug 99
11.3 Sensitivity Mode
•
The commissioning engineer can adjust the sensitivity of both temperature and smoke detectors by adjusting the
threshold at which pre-alarm and fire alarm signals are generated.
•
These alternative thresholds are programmed to operate only at certain times of the day and at all other times the
thresholds will return to normal.
This facility is very flexible. It should only be used in certain specialized applications and
with great care. The default mode is for all detectors to default to the manufacturers
recommended alarm level.
11.3.1 Commissioning Sensitivity Mode
•
Press
2
to select Sensitivity 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.
There is no restriction on the range of times entered. Any special pre-alarm and fire alarm
values entered for the devices will then be used within the specified period.