Elma Instruments ELMA 46, Руководство пользователя

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Elma 46 25
v. 170309
6 Operating
6.1 Test cables:
The TEST function tests the attached cable based on the cable’s compliance with the parameters
stored in the tester for the selected cable. To test a cable, perform the following procedures.
1. Select cable type under test.
2. Connect the cable under test to the appropriate connector on the tester.
3. Press TEST key.
The tests are performed depend on whether a remote identifier unit (ID) is connected to the end
of the cable or not.
FAILURES DETECTED Short Open
(nearend
) Open
(farend
) Length Split pair Mis wire
NO remote unit
   
with remote unit
     
For twisted pair cables, when the tester checks for a cable remote identifier unit (ID) at the other
end of the cable and a pass condition exists, the LCD will display the following information.
If testing coaxial cable with a termination, the tester displays the total resistance of the cable
wires and the termination.
Only coaxial cables must be unterminated for the tester to display the cable’s length. If a coaxial
cable is open looks just like an unterminated cable, then a length measurement that is less than
the known cable length would indicate a possible open in the cable.
The tester if a failure is detected, additional information can be viewed with the ▼/ ▲keys. The
failure messages refer to individual wires rather than pairs of wires. The TEST mode failure
messages are described in following tables.
Test failures (without remote unit) Test Failures with remote unit
FAILURE DISPLAY DESCRIPTION FAILURE DISPLAY DESCRIPTION
A short greater than 0
Ω, will cause display a
length greater than the actual distance to the
short. The tester uses 0
Ω to calculate
distance to a short.
Miswire
Display the
incorrect wiring of
the end
connectors.
Short
(UTP/FTP)
Displays shorted
wires and most
likely distance to
the short.
Par
længde
m
Indicates that the
length of the pairs
within a cable are
abnormal
different
OPEN
Display open wires
and the open
whether it is at the
near or far end of
the cable
Open
Display the
broken wire and
the distance to
the break.
Split Pair
Displays wire
pairings that are
incorrect based on
the cable selected..
Split Pair
A portion of the
cable assembly
has split pairs or
a poor quality
cable.
COAX ST = 49.0
Ω
m
m
Good cable, cable
remote unit ID#1
detected. Good cable, no cable remote
unit detected or the tester may
not sense the remote unit.