Testing A Cable; Single Shot And Continuous Scanning Modes - Chauvin Arnoux CA 7026 Manual De Instrucciones

Coaxial Cable: Connect the red clip to the center wire and the black clip to the shield/
screen.
Shielded Cable: Connect the red clip to a wire adjacent to the shield and the black clip to
the shield.
Twisted Pair: Separate out one pair and connect the red and black clips to the two
wires of the pair.
Multicore Cable: Connect the clips to any two wires.
4.9

Testing a Cable

After setting the Vp value and cable impedance (Z) to match the tested cable, attach the
Fault Mapper Pro™ to the cable, as described in § 4.9.
Press the TEST/ button, to get to the test screen.
Vp=72% Z=100Ω
413ft
Coaxial Cable
Shielded Cable
Twisted Pair
Multi-conductor Cable
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The following display shows a cable with impedance anomalies on it.
Vp=72% Z=100Ω
210ft
The vertical cursor line is moved left and right along the line of the trace by pressing the
and buttons.
To determine the distance to an event, position the cursor at the beginning of the event and
read off the distance as shown below.
Vp=72% Z=100Ω
413ft
On the fault curve shown in the previous two screens, a low impedance event occurs at
210ft, shown by a downward spike on the curve, and a high impedance event occurs at
413ft.
The open end of the cable is shown as a large positive spike This is used to determine the
end (length) of the cable.
4.10

Single Shot and Continuous Scanning Modes

When the Fault Mapper Pro™ is first switched on, it is set to "Single Shot" mode.
In this mode, the Fault Mapper Pro™ only fires a pulse into the cable under test when either
the and buttons or the TEST/ button is pressed.
To enter "Continuous Scanning" mode press and hold down the TEST/
The i con will appear at the top of the display, when Continuous Scanning mode is
active.
button.
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