Fluke 990DSL, Руководство пользователя

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990DSL
Users Guide
4-34
3. With the strapping prompt screen displayed, press
K
.
This starts the second part of the K-Test, during which the tester
measures loop resistance and performs a nulling bridge operation on
the pair
with the far-end shorted.
After completion, the tester displays resistances to the fault and strap,
as in the normal RFL process.
4. Press
A
(
Distance to Fault
) to view distances, as is normally done.
Load Coils Test
The Load Coils test performs a frequency sweep of the pair (either spare or
working POTS) to determine the number of load coils present, and the
approximate distance to the first coil.
Setting Up a Load Coils Test
The Load Coils test requires that the predominant wire-gauge to the first load
coil be entered in Setups, for the most accurate distance-to-first-load results.
Load Coils Test Results
To run the Load Coils test, select the test on the POTS Toolbox and press
K
.
Figure 4-21 shows the results of a Load Coils test that was conducted on a pair
with six loads: