Table of Contents
Advertisement
6.14
6.14.1
Building Technologies
Fire Safety
Tips for troubleshooting on the detector line
Once the detector line has been read in, the FDUL221 line tester detects the
following detector line errors:
Open line
Ground fault
Short-circuit
Shield fault
Shield permeability
Shield ground fault
If a single line device is selected with the FDUL221 line tester, its internal or
external alarm indicator will flash.
If the 'All ON' is selected in the 'Locate devices' menu, the internal/external alarm
indicators of all line devices detected by the FDUL221 line tester flash. In this way,
you can detect line devices that were not detected by the FDUL221 line tester.
Error search using the 'bisection' method
The FDUL221 line tester is ready for operation.
1. Separate the lines on a line device in the center of the loop or stub and create
two stubs.
2. Measure each stub.
You will detect the stub with the error.
Divide the faulty stub in the center and connect the previously separated
points.
3. Measure each stub.
This will enable you to identify the area with the error.
4. Proceed as described with the division until you have located the error.
The increasingly smaller sections will enable you to rapidly locate the error.
A
A
A
Error search using the 'bisection' method
Tips for troubleshooting on the detector line
B
B
B
Operation
6
61
008250_i_en_--
2013-08-15
Hide quick links:
Advertisement
Table of Contents
