Sekotech ST-300 SPIDER, Руководство по эксплуатации, Страница: 33 / 68

OPERATING MANUAL
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To start testing press “F4” (“Scan All”). Measurements will be taken consecutively on each two-wire
combination, highlighted grey in the table while being tested, and with running dots in the “Level/Dist”
cell. When the measurements are complete, the corresponding cell in the “Level/Dist” column will show
mutual inductive and/or capacitive reactance between the wires of the pair, and distance to the anomaly
with the most potent response. The next table line will then become active, and measurements will
continue until all two-wire combinations have been thus analyzed.
Fig. 40 shows the table with data obtained on a cable consisting of four twisted pairs and free of any
defects. In Fig. 40:
Fig.40
1 – current mode
2 – wire pair connected
3 – reverse value of velocity factor
4 – two-wire combinations column
5 – resulting data column
6 – highlighting of two wires from different twisted
pairs (white)
7 – highlighting of two wires from the same twisted
pair (light blue)
8 – distance to the irregularity with maximum
reflection; for a defect-free cable, the anomaly
returning the strongest reflected signal is its “far
end”
9 – graphic representation of the measured mutual
nductance/capacitance between the wires in a
pair
Based upon the results of the measurement cycle, the maximum mutual inductance/capacitance level
registered is taken for 100 percent, and the rest are scaled proportionately in the graphics.
For a new measurement cycle, press “F4”.
Upon completion of the automatic measurement cycle, separate measurements can be taken on any
given pair of wires. To do that, use the arrow keys to move the table cursor to the corresponding table
line. Measurements will start automatically. The measuring process will be signaled by running dots.
When done, the distance to a discovered anomaly and the amount of mutual inductance/capacitance in
the pair will be shown.
Upon completion of measurements, the obtained data can be analyzed automatically. To start automatic
analysis, press “F3”. The approximate cable length, and numbers of wires that are paired together ( i.e. ,
belong to the same twisted pairs) will be shown on the screen. Furthermore, if anomalies are found, the
corresponding wire pairs will be indicated, as well as distances to the anomalies. Figure 41 exemplifies
the results of such an analysis.
In Fig. 41:
Fig.41
1 – approximate cable length; it is marked as N/A,
if there has been no response neither from
anomalies, nor from the other end of the cable;
2 – numbers of wires that are paired together
(belong to the same twisted pairs); marked as
N/A if the cable type selected (as described in
2.5.1.1) is not “twisted-pair”;
3 – number of anomalies found; N/A if none.
If anomalies have been found during testing,
information on those will be displayed.
To return to the measurement data table, press
“ESC”.