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Adjust Sensor Optical Sensitivity and/or Temperature Thresholds

This article explains how to adjust the sensor sensitivity and temperature-related settings from the front-end of the panel to either reduce pre-alarms or re-commission the device for different environments.

 

Summary

  • You can change optical sensitivity and temperature trigger settings from the front-end by editing the device in the loop view. The detector hardware itself cannot be modified.

Why sensitivity and temperature settings may need adjustment.

  • The sensor’s fire point will automatically be adjusted every 24 hours by the panel to allow for any contamination upto a point where the sensor will become out of service.
  • The sensors fire point can be adjusted manually to re-commission the device to better suit the environment. (warehouse or kitchen for example) 

Where to change settings (front-end steps)

  1. Gain access to the device configuration settings at the panel.
  2. Navigate to the loop and address of the device.
  3. Edit the device attributes or scroll to the sensitivity column
  4. Gain access to the menu.
  5. The optical sensitivity rage is from 1.0% to 4.5% (1.0% being the most sensitive) typically 3.0%/M
  6. The Thermo/heat channel range is from 60 to 88 degrees Celsius (typically 60)
  7. Adjust the values as per the fire risk assessment.
  8. Save the changes and monitor the detector to confirm the desired behavior.

Notes and considerations

  • These settings are adjusted from the front-end panel; the physical detector device ( hardware) itself cannot be modified.
  • After making changes, observe the detector for a period (trial) to ensure the adjustment reduces unwanted pre-alarms without compromising detection of real events.

Conclusion

  • Conclusion You can manage false or pre-alarms by editing a detector’s sensitivity to "a custom setting"  Perform changes carefully and monitor the detector to ensure the balance between reducing false alarms and maintaining effective detection is not comprimised.