T-C880 Cable Fault Locator
Introduction:
Connecting the instrument and pressing a button, you can get the
distance to fault. The T-C880 cable fault locator, a highly
intelligent instrument, makes the dream of every cable maintenance
people come true. Utilizing the latest microelectronics and digital
signal processing techniques, T-C880 has internal gain control and
impedance balancing capability, and can automatically calculate
distance to fault. It is an ideal fault location and integrity
testing instrument for telecom and control cables.
T-C880 applies pulses simultaneously to the line and balance
outputs and displays the differential between resulting two
signals. A switch allows the balance output to be applied to either
a second (healthy) or an internal balance circuit simulating wave
impedance of the cable tested. The direct mode of operation uses
internal balance that will cancel the outgoing pulse in displayed
trace to make fault reflection easily recognizable.
The differential mode provides significant reduction in common
distortion, an occurrence common with twisted cables, resulting in
clean, easy to read traces. For high resistance fault like poor
insulation, T-C880 uses bridge mode to locate fault. We can regard
the cable is composed by many resistors, if we can measure the
value of resistance from the detecting point to fault point, use
this value divided by cable length, we will get the distance to
fault.
Specifications:
- Range: 8 Km.
- Blind area: 1m.
- Resolution: 0.5m.
- Output impedance: 82-594 adjustable
- Pulse amplitude: 30V
- Pulse width: 160 ns-3.5s adjustable with different range scope.
- VOP range: 100-300m/s.
- Fault resistance range: 0-30 M
- Accuracy: 1% cable length
- Voltage: 100V
- Measuring range: 9999m
- Operating temperature: -10-+50
- Dimension: 230mm 140mm 170mm
- Weight: 3 Kg
Features:
- While the auto test ability makes the fault detection a much easier
job, the manual operation interface provides an experienced
operator more test flexibilities.
- Bi-polar pulse reduces attenuation and distortion of reflection of
long distance fault, which significantly makes fault reflection to
be recognized easier and increases accuracy.
- Comprehensive operation modes enable close up faults within few
meters, to be located without the need to use interposing delay
lines or coils of cable.
- Pulse velocity can be calibrated to any cable dielectric.
- While mainly designed for telephone cable with 8 Km range it can be
easily modified to test longer distance cable.
- Using internal rechargeable li-ion battery with power save mode and
power low indication, the instrument can continuously work for 5
hours without recharging.
- Up to 10 waveforms can be stored in internal no-volatile memory for
later analysis, or computer read out through USB Disk, this make
the waveform no limitation storage.
- A PC software package provides powerful fault reflection traces
analysis capability. The fault point can be discriminated even
easier by comparing a fault cable reflection with the trace
recorded when the cable was ood.
- A big LCD screen (320*240) with backlit gives much clearer waveform
and message display.
- Immune to the effect if induced or impressed voltages on the cable
under test.
- Portable and rugged design makes the unit easy to carry and
withstand tough field environment.
