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FIRElink-NANO Air Sampling Detector – Installation and User Manual Page 13 of 21

9-5-0-425/ISS1/JUL10

8 Configuration

Configuration is carried out via the DIL switch mounted on the Main PCB.

Switch

Set Detector

Sensitivity

Alarm Factor 6

Off Off

Alarm Factor 7 On Off

Alarm Factor 8 Off On

Alarm Factor 9 On On

ClassiFire

Enabled

Off

Fixed Alarms

Enabled

Flow Limit Offset

±40 Off Off

±20 On Off

±5

Off On

±3 On On

Flow Delay

240sec

Off

30sec On

Input Select

PSU Fault

Off

ClassiFire Override On

Auto Calibration

Enable

Off

Disable On

NOTE: Text in red denotes the EN 54-20 test configuration (factory default) setting.

8.1 Alarm Factor

The detector calculates sensitivity relative to the ambient environmental conditions. Higher Alarm Factors

provide reduced sensitivity (the Alarm threshold is maintained further away from the ambient level). Refer

to the Remote Software manual for further details.

NOTE: Changing the Alarm Factor starts a new FastLearn cycle: during the initial 15 minute learning

period, the detector is incapable of reporting an alarm. The unit will take 24 hours to achieve

optimum performance, based on the ambient conditions.

8.2 ClassiFire

Enabled

Allows the artificial intelligence system to continuously adjust Alarm thresholds in order to avoid unwanted

Alarms from environmental changes (recommended).

NOTE: Enabling this feature means that nuisance alarms due to fluctuations in the ambient environment

become less likely.