ZX Fire Alarm Control Panels MORLEY-IAS
Commissioning Manual Document No. 996-175-000-1, Revision 01 Page 59
16.6.2 System Sensor/ M-IAS Multi-sensor & Laser detectors
• The System Sensor / Morley-IAS Multi-sensor and laser detectors are supported in panel software
version 824 onwards and loop driver software version 9 onwards.
• There are 6 modes of operation (alarm levels) available on the multi-sensor and 9 on the laser
detector, as in the tables below.
Threshold Mode Sensitivity
45 Level 1 alarm 1% / ft obscuration.
55 Level 2 alarm 1% - 2% / ft obscuration (self-adjusting).
72 Level 3 alarm 2% / ft obscuration.
86 Level 4 alarm 2% - 3.5% / ft obscuration (self-adjusting).
101 Level 5 alarm 3.5% / ft obscuration.
116 Level 6 alarm Heat only.
System Sensor Multi-sensor Modes of Operation
Threshold Mode Sensitivity
47 Level 1 alarm 0.02% / ft obscuration.
55 Level 2 alarm 0.03% / ft obscuration.
62 Level 3 alarm 0.05% / ft obscuration
69 Level 4 alarm 0.10% / ft obscuration.
76 Level 5 alarm 0.20% / ft obscuration
83 Level 6 alarm 0.50% / ft obscuration
90 Level 7 alarm 1.00% / ft obscuration
97 Level 8 alarm 1.50% / ft obscuration
105 Level 9 alarm 2.00% / ft obscuration
System Sensor Laser Modes of Operation
• Where the control panel sensitivity day mode is used, the multi-sensor/laser mode can be modified
according to the specific site requirements. This allows a different mode of operation at different times
of the day (see ‘Sensitivity Mode’ in Section 11.3).
• When night mode is invoked, the multi-sensor mode is fixed at alarm level 4, with pre-alarm fixed at
alarm level 3. The laser mode is fixed at alarm level 5 and pre-alarm level 4.
• To program the day mode operation for each multi-sensor/laser device, select ‘edit thresholds’ from
the edit device menu. Set the required threshold level for both fire and pre-alarm that corresponds to
the desired mode of operation (refer to tables above).
Note that it is important to adhere strictly to the suggested threshold settings for each
mode – these are chosen to allow for various system / device tolerances.
• It is also important that after any Multi-Sensor device replacement, an Auto Learn must be performed.
This has the effect of re-initialising the device (enabling the heat only alarm level)
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