Amprobe TDR-400 Manual de usuario

Impulsreflektometer

TDR-400

Manual

BEHA-AMPROBE GmbH

In den Engematten 14, D-79286 Glottertal, Germany

Tel.: +49 (0) 7684-8009-0 Fax: +49 (0) 7684-8009-410

Impulse Reflectometer TDR-400

The TDR-400 is a handy, light impulse reflectometer, processor controlled, with LCD display

for check and locate faults in telecommunication and power cables.

Technical data

Display: LCD display, 120 x 32 pixel, illuminated

Power supply: NiMH accumulator 6 V/ 700 mAh (5 x R3),

Power consumption 80 mA

Dimensions: 157 x 84 x 30 mm

Operating: with 3 keys

Weight: 300 g

Measuring ranges

Measuring range 0 – 2000 m

Resolution 0.25m, 0.5m, 1m, 4m

Accuracy 0.2 % of the measuring range

Propagation factor 0.25 to 0.999

Storage places 10 for propagation factor

Dynamics 44 dB

Impedance 75 Ohm

Output F-socket

Output pulse 4 V / 5 ns or 100 ns

Operating

−Switch on: push key 1, after that push key 3. (accumulator full app. 7 V, empty app. 5.5V)

−Switch off: push simultaneously key 2 and 3, after 4 min. inactivity automatically.

If the accumulator voltage drops to 5.9 V, a fade-in happens on the display.

At 5.5 V the IRM switches off itself.

- Change between length measurement and length range: push shortly key 3

- Cursor move or range change: with key 1 or 2

- Fast cursor moving: keep key 1 or 2 pushed

- Selection of resolution, output pulse width, storage place or propagation factor:

push long key 3 until the desired symbol appears inversely.

change of the selected value with the keys 1 and 2.

Permanent storage: push keys 1 and 3 simultaneously.

back: push short key 3 .

- moving of the zero line:

The amplitude on the cursor position can be set to the zero line by pushing the keys 1 and

2 simultaneously. Because the IRM 5 has its highest sensitivity in the area of the zero

line, e.g. the graphical representation of the amplitude on the pulse peak can be seen.

This function can be cancelled by pushing the key 3.

- Start mode: If at a determined resolution the keys 1 and 3 are pushed simultaneously,

this resolution is at switch on of the IRM active.

- Charging: Plug power supply 2-24 V DC or AC on the charging socket 5,5 / 2,1 mm (+pole

inside).

Display of the power supply voltage (12-28 V) and charging monitoring on the display.

Propagation factors:

Mains cable 0.49–0.57, (ca. 0.53)

Coaxial cable with PE-dielectric 0.66

Coaxial cable with foam-PE 0.77–0.85

Air isolation

Determination of the propagation factor (nvp-value) of a cable:

Connect a cable of a known length (e.g. 100 m) on the IRM, set the cursor on the cable length

and change the propagation factor so, that the pulse echo is located behind the cursor.

Measuring principle:

The measuring pulse fed into the cable will reflected by in homogeneity of the cable impedance

(cable faults) and showed on the display.

The distance and the kind of the fault can be determined out of the shape and the time setting of

the reflection.

(Practical experience can be obtained by test measurements).

The Propagation factor (nvp-value) declares the velocity of electrical signals in the cable in

relation to the speed of light.

−The propagation factor of the cable under test must always preset before the length

measurement.

−If the propagation factor is unknown, a approximate value is set and the fault is determined

from both ends of the cable

Fault location:

ATTENTION ! No measurement on live cables ! (electric strength max. 65 V)

At 0 m the positive transmitting pulse can be seen. If the connected cable is open on its end, an

additional positive going pulse appears on the display. In the case of a shorted end of the cable a

negative going pulse appears reflected from the cable end (pulse echo).

Adjust the cursor to the beginning of the pulse and read the cable length.

If the cable is terminated with a resistance equal to the impedance of the cable, no reflexion

occurs when the cable is faultless.

In the case of breaks, contact faults in sleeves, short circuits or taps/splitter in the sector to be

tested, the distance to the cable beginning can be determined by the pulse echo.

If wide pulses are used for the measurement, the echoes are stronger, but faultless taps/splitter

cause then strong echoes.

Zero adjustment of the transmitting pulse:

Select a storage place of the propagation factor and push key 1 and 2 simultaneously up to

„-_∏_-“ appears on the display. Shift the transmitting pulse with key 1 or 2 so that the cursor is

located at beginning of the pulse.

Store this setting by pushing the keys 1 und 3 simultaneously.

Back to the normal operation with key 3.

Tabla de contenidos

Otros manuales de Instrumento de medición de Amprobe

Amprobe

Amprobe THWD-5 Manual de usuario

Amprobe

Amprobe AMCM100 Manual de usuario

Amprobe

Amprobe 3434877 Manual de usuario

Amprobe

Amprobe VPC-10A Manual de usuario

Amprobe

Amprobe LH41 Manual de usuario

Amprobe

Amprobe ACD-21SW Manual de usuario

Amprobe

Amprobe AM-500 Guía

Amprobe

Amprobe CT-326-C Manual de usuario

Amprobe

Amprobe LM-100 Manual de usuario

Amprobe

Amprobe AT-6000-R Manual de usuario

Amprobe

Amprobe THWD-2 Manual de usuario

Amprobe

Amprobe VP-600SB Manual de usuario

Amprobe

Amprobe TIC 300 PRO Manual de usuario

Amprobe

Amprobe ECB50A Manual de usuario

Amprobe

Amprobe UDM45 Manual de usuario

Amprobe

Amprobe THWD-3 Manual de usuario

Amprobe

Amprobe SM-10 Manual de usuario

Amprobe

Amprobe NCV-1020 Manual de usuario

Amprobe

Amprobe TMA-20HW Manual de usuario

Amprobe

Amprobe EARTH-TEST Manual de usuario

Amprobe

Amprobe ALC-110 Manual de usuario

Amprobe

Amprobe SM70 Manual de usuario

Amprobe

Amprobe AC50A Manual de usuario

Amprobe

Amprobe MAN15 Manual de usuario

Manuales populares de Instrumento de medición de otras marcas

Suaoki

Suaoki D40 Manual de usuario

Elster

Elster BK-G1.6 Manual de usuario

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manual

Duratool

Duratool D03128 Manual de usuario

Vega

Vega VEGAPULS 65 Manual de usuario

Tonghui

Tonghui TH2618B Manual de usuario

Tenmars

Tenmars TM-801 Manual de usuario

MSR

MSR 145 Manual de usuario

TPS

TPS WP-82 Manual de usuario

ELMETRON

ELMETRON CP-511 Manual de usuario

PCB Piezotronics

PCB Piezotronics 003C30 Manual de usuario

Tenma

Tenma 72-10465 Manual de usuario

Endress+Hauser

Endress+Hauser Proline Promag 50 Especificaciones técnicas

Siemens

Siemens SITRANS F Coriolis FCT030 Manual de lista de piezas

KLINGER

KLINGER CMF V Series Manual de usuario

EXFO

EXFO FTB-2 Manual de operación y mantenimiento

Keysight

Keysight M8290A Manual de usuario

ADTEK

ADTEK MW-5 Manual de usuario