Error Search Using The 'Measure Line Device' Method - Siemens FDUL221 Technical Manual

6 Operation
Tips for troubleshooting on the detector line
6.14.2
62
Building Technologies
Fire Safety

Error search using the 'measure line device' method

Recommended for errors E02, E14, E15. Using the measured value you can
determine whether the error lies upstream or downstream of the selected line
device. The location of the error can be rapidly determined through the selection of
line devices.
Proceed as follows:
1. Restart the detector line.
2. Navigate to the desired line device in the line tester display.
3. Press the button.
4. Select the 'Measure Device' menu item.
5. Perform steps 1 to 4 for more devices if required.
Measure the terminal resistances of the line device in the 'Measurements' menu.
The values displayed are totals. The total value is affected by line resistance and
diodes (e. g. external alarm indicators). Take this into account when analyzing the
measurement.
Loop
Plus and minus lines are measured separately
Cable from 'A' and 'B' separated
Diodes are detected and localized (wire 'A' or 'B' and
Stub
Only the total resistance is measured
Only used for stub and sub-stub
)
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2013-08-15