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There is a tendency that coiled sensing cable can cause intermittent false alarm. The sensing wires may
touch each other momentarily, especially when there are strong wind and/or vibration affecting the
sensing cables.
Recommended Solution:
Uncoil the excess sensing cable and laid them in “S” shape using hold down clips to avoid touching
or overlapping each other.
Above pictures shows that there is insufficient hold down clips used to support the sensing cables.
When there are strong winds and vibration below the raised floor, there is a tendency that these sensing
cables may be moved and touching the metallic pedestal or any other metallic objects nearby, thus
causing intermittent false alarm.
Recommended Solution:
Stick more hold down clips to these loosely supported sensing cables and clear from any metallic
parts/objects.
Use PVC spiral sleeve to wrap round the affected length of the sensing cable if accessibility is an
issue.
Figure 17: Leak false alarm due to coiling of excess sensing cable
Figure 18: Improper laying of sensing cable
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