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Megger BTDR 1500
Combined Automatic Resistance Bridge & TDR Fault Locator
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10 m to 3 Km TDR Measurement Ranges
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Automatic Resistance Bridge with Measurement range up to
100Km
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Built in Insulation Tester, dc Voltmeter & Loop Resistance
Meter
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Suitable for Telecom, Coax, Datacom & Power Cable
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Dust and shower proof to IP54
The MEGGER® BTDR1500 is an advanced instrument capable of
identifying nearly all types of cable fault using both Time Domain
Reflectometry and Automatic Resistance Bridge Techniques. It offers
exceptional features and a range capability normally associated with larger,
more expensive products.
Location of open circuits and low resistance faults using the
TDR facility can be performed from 0,1 m to 3000 m with a measurement accuracy
of 1%. Location of faults using the Automatic Resistance Bridge facility can
be performed on cables up to 100 km in length (dependent on conductor diameter
and resistance) with a measurement accuracy of 0,2%.
In TDR mode the BTDR1500 can be used on any cable consisting
of at least 2 insulated metallic elements, one of which may be armouring or
the cable screen. The instrument can be carefully matched to the cable using
the Tx Null control allowing long lengths of cable to be easily tested and
elimination of "dead zone" such that faults close to the instrument can also
be seen. The propagation velocity value can be similarly adjusted to match the
cable, thus ensuring an accurate distance measurement can be directly read. To
enable a wider range of faults to be detected in TDR mode, the gain of the
instrument is also variable, allowing more minor faults to be identified over
the entire length of the cable.
The Automatic Digital Bridge can measure the insulation
resistance up to 200 MW
(insulation test), the loop resistance up to 2 kW
(2-wire loop test) and the series leg resistance of up to 1 kW
(3-wire loop test). Where a fault causes the insulation resistance to lie
below 20 MW,
the fault position can be determined (AUTO test) relative to the meter end and
also relative to the far end where a loop has been made by fitting a strap
between the wire under test and one or two return wires. In the case of a
single return wire (2-wire test method), the position of the strap is assumed
to be at the position of half the total loop resistance. If two return wires
can be used (3- wire test method) the position of the strap will be known to
greater accuracy and will be independent of the resistance of either of the
return wires.
In addition to the TDR facility and Automatic Resistance
Bridge, the BTDR1500 has a voltmeter range for measuring a DC voltage to ±250
V and can verify if a telecomm cable has a Telecom Network Voltage (TNV)
present on it.
FEATURES AND BENEFITS
TDR
TX Null Balancing circuit allows the transmitted pulse to be
eliminated from the displayed trace, removing the "Dead Zone" and allowing
faults to be identified at the near end of the cable. Pulse widths down to 7
ns allow for accurate discrimination between faults.
Pulse widths up to 3000 ns and four gain settings allow for
the detection of cable faults up to 3 km away.
Auto range facility selects most appropriate measurement range
according to cursor position to ensure ultimate accuracy in fault location.
Automatic Resistance Bridge
Advanced automatic balance Resistance Bridge enables location
of cable faults up to 100 km away to an accuracy of 0.2%.
Two or three wire operation enables accurate fault location on
balance or unbalanced cable pairs.
Loop resistance measurement up to 2 k. enable cable losses and
line length to be calculated to ensure suitability of lines for use in Digital
Transmissions.
Insulation resistance measurement range enables identification
of the nature of a cable fault and assists in the prequalification of
potential DSL lines.
DC Voltage measurement indicates the presence of Telecom
Network Voltages (Battery Voltage)
Please CONTACT
US for information on the above instrument
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