Fluke 990DSL, Руководство пользователя, Страница: 68 / 242

990DSL
Users Guide
4-4
Table 4-1. User-Selectable Tests for the POTS Auto-Test
Test Description Settings (default in bold)
Voltage Measures AC and DC
voltages on all legs of
spare or working pairs. No choice, always run.
Shorts & Grounds Measures resistance
between all legs of spare
pairs. No choice, always run.
(N/A on working pairs)
Opens Measures capacitance on
spare pairs, converting to
distance based on the
Cable Type selected. Select Y to enable the test
Select N to disable the test.
(N/A on working pairs)
Load Coils Detects the number of
coils and approximate
distance to the first, on
spare or working POTS
pairs, plus a frequency
response graph. Select Y to enable the test
Select N to disable the test.
Loop Devices Detects the presence of
loop treatment devices,
fault-sectionalizing
devices, and Mechanical
Bell Ringers on spare or
working POTS pairs. Select Y to enable the test
Select N to disable the test.
VF Long. Balance Measures resistive and
capacitive balance of the
pair to Ground, on spare
or working POTS pairs. Select Y to enable the test
Select N to disable the test.
Loop Current Measures Loop Current,
Ring-Ground Current, and
cable sheath Ground
resistance on working
POTS pairs. Select Y to enable the test
Select N to disable the test.
(N/A on spare pairs)