LDE800 Data Sheet Brochure

User Manual: LDE800-Data-Sheet-Brochure

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LDE 800
Extension for reflectometers

LDE 800
Long distance extension for all
applications where normal reflection
measurements fail
■■ Range extension for reflectometers
■■ The high impulse voltage minimises the
limitations of distance, resistance and
attenuation on reflection measurements
■■ Distance-dependent amplitude correction
compensates for cable attenuation of any
type
■■ Adjustable filtering eliminates most
interfeing effects and distortions
■■ External compensation provides the best
compensation possible

DESCRIPTION
The LDE 800 functions as an add on to reflectometers for
measurements on cables with extreme physical conditions
including excessive lengths, high attenuation and resistance,
very low or high impedance and other difficult-to-overcome
values. Such cables include:

■■Long sub-sea cables (power or umbilical)
■■Overhead lines
■■Heating cables and district heating monitoring
■■High attenuation cables
■■Large cross section cables

The typical output voltage is 800 V at 50 Ohms impedance.
The unit consists of 4 main modules that can be adapted to
different requirements:

■■The module with impedance matching and adjustment to
provide the adaptation to cable parameters from 3 to 400
Ohms.

■■The filter module with adjustable high and low pass filter
circuits compensates for inductive effects and external
influences, especially on long cables.

■■The impulse generator for output pulses that vary by cable
impedance from 100 to 2200 Volts and pulse widths of
up to 10 ms.

The technology

■■The amplifier module with adjustable gain and distance

Instead of using the internal impulse generator of the reflectometer (TDR) the LDE 800 has its own powerful measuring
pulses which are measured by the reflectometer in the passive transient mode.

To simplify its use, the system has a basic default setting for
all parameters. Tuning these defaults will then guide the user
to the best results.

pending amplitude correction.

TECHNICAL DATA*
LDE 800
Pulse amplitude @ 50 Ω
Pulse width
Filter
High pass
Low pass
Adaptation
Low
High
Supply
Dimensions (W x H x D)
Weight

SCOPE OF DELIVERY

■■LDE 800 unit
100 … 800 V in Steps
0,5 ... 10 µs in Steps
0 ... 12 kV or 0 ... 4 kV
fLL = 6 ... 587 kHz in Steps
fUL = 16 ... 15.500 kHz in Steps
240 V / 4 Ω, 800 V / 50 Ω,
2.000 V / 400 Ω
33 / 22 / 15 / 10 / 6 / 3 Ω
50 / 75 / 100 / 175 / 250 / 400 Ω
230 V / 50 Hz; others on request
483 x 295 x 200 mm (19“, 6 HU)
13 kg

■■Set of cables
■■Accessory bag

OPTION

■■Discharge transformer (for residual charges and termination of open ends)

ORDERING INFORMATION
Product

Order no.

LDE 800

899005565

Option:
Discharge transformer

* We reserve the right to make technical changes.
GERMANY
Megger GmbH
Obere Zeil 2
D-61440 Oberursel
T +49 6171 92987 0
F +49 6171 92987 19
info@megger.de

CERTIFICATION ISO

Seba Dynatronic
Mess- und Ortungstechnik GmbH
Dr.-Herbert-Iann-Str. 6
96148 Baunach
T +49 (0) 9544 680
F +49 (0) 9544 2273
team.dach@megger.de

Hagenuk KMT
Kabelmesstechnik GmbH
Röderaue 41
01471 Radeburg
T +49 (0) 35208 840
F +49 (0) 35208 84249
team.dach@megger.de

2

Registered to ISO 9001 Cert. no. 000677 QM08

LDE800_DS_EN_V02
www.megger.de
Megger is a registered trademark



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