Chapter 3: Commissioning
20 Alarmline II Digital Linear Heat Sensor Cable Technical Manual
Ensure that the installed sensor cable is fully tested and inspected prior to
handover. Use the following guidelines to ensure that this is done correctly.
Passive checks
• Visually inspect the cable to ensure correct installation in accordance with the
specification and system design.
• Check that the correct cable (alarm temperature) has been installed.
• Check each cable for mechanical damage, that all clips are securely held in
place, and that the cable is correctly installed within the clips.
• Inspect all joints and terminations to ensure that they are correctly installed
and appropriate for the application and environment.
• Ensure that the correct end-of-line device is fitted for the monitoring
equipment used.
• Ensure that the correct value alarm resistor is installed and that it is in the
correct location.
• Check that insulation resistance between conductors (excluding end-of-line
devices) is 1000 MΩ per km (minimum).
• Check that the conductor resistance per km/ft. does not exceed that listed in
“Technical specifications” on page 5.
Functional testing
Alarmline II Digital Sensor Cable is non-restorable and it is therefore not possible
to test the cable by applying heat without damaging it. Simulated tests are
recommended.
Simulated fault test
The sensor cable is monitored for open circuit fault only.
To perform the test:
1. To trigger a fault condition, remove any connection between the monitoring
equipment and the sensor cable.
2. Confirm that the monitoring equipment registers a fault condition for the
sensor cable.
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