Megger ME-TDR2K2R Bruksanvisning

M

TDR2000/2, TDR2000/2R, TDR2000/2RM &

TDR2000/2P

Time Domain Reflectometer

USER GUIDE

GUIDE DE L’UTILISATEUR

BENUTZERHANDBUCH

GUÍA DEL USUARIO

GUIDA PER L’UTENTE

ANVÄNDARMANUAL

GEBRUIKERSHANDLEIDING

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 1

GSAFETY WARNINGS

nThis instrument meets the safety requirements of IEC 61010 part 1 to 300V CAT III.

nAlthough this tester does not generate any hazardous voltages, circuits to which it can be connected could be dangerous due to electric shock

hazard or due to arcing (initiated by short circuit). While every effort has been made by the manufacturer to reduce the hazard, the

user must assume responsibility for ensuring his or her own safety.

nFor use on energised systems rated up to 300V Installation Category III* use the fused clip set Megger Part Number 6111-218,

must be used.

nRelates to the transient over voltages likely to be met in fixed wiring installations. CAUTION (Risk of electric shock)

4mm plug to BNC Adaptor:

nThis 4mm plug to BNC adaptor is intended for use with telecom network cables only, it is not designed or intended for direct connection to

an energised mains supply. However, in normal use it may be subject to telecom network voltages (TNV) as defined by IEC 60950 3rd edition

(1999-04).

nThe BNC plug and socket are, by necessity, accessible. The outer sheath for this connector is normally at SELV levels, however under single

fault conditions it may carry hazardous voltages. The operator must therefore verify that the accessible plug or socket is at SELV levels prior to

touching, or alternatively wear appropriate insulated gloves.

nThe instrument should not be used if any part of it is damaged.

nTest leads and crocodile clips must be in good order, clean and with no broken or cracked insulation.

nCheck that all lead connections are correct before making a test.

nAFused Lead Set must be used to connect to energised live systems. Refer to the accessories section for options.

nDisconnect the test leads before accessing the battery compartment.

nRefer to operating instructions for further explanation and precautions.

nSafety Warnings and Precautions must be read and understood before the instrument is used.

They must be observed during use.

2

NOTE

THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 2

Care and Maintenance 15

Specification 15

Accessories 17

Repair and warranty 18

Symbols used on the instrument are:

GCaution: Refer to accompanying notes.

FEquipment protected throughout by double or

reinforced insulation.

tInstrument flash tested to 3.7kV rms.

cEquipment complies with current EU directives.

CONTENTS

3

Safety Warnings 2

Introduction 4

User Display & Control guide 5

Display detail

Controls

Operation 9

Battery Fitting and Replacement

TDR2000/2

TDR2000/2R & TDR2000/2RM

TDR2000/2P

Initial Power Up 9

Power-up and initial configuration

Using the TDR2000/2 10

Line Feed

Connection to cable under test

Measuring distance to fault

Instrument Features 12

TxNull

Velocity Factor

Pulse Widths

Trace Storage 13

Saving a trace to memory

Recalling a trace from memory

Downloading a trace to a PC

Uploading stored trace from PC to TDR

Techniques for Improving Accuracy 14

Test the cable from both ends

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 3

INTRODUCTION

4

Thank you for purchasing the TDR2000/2 cable fault locator. Before

attempting to use your new instrument please take the time to read this

user guide, this will save you time, advise you of any safety precautions

you need to take and prevent damage to yourself and the instrument.

The TDR2000/2 is an advanced instrument capable of identifying a wide

range of cable faults. The instrument uses a technique called Pulse Echo

(also known as Time Domain Reflectometry or TDR). A pulse is

transmitted into a cable from one end. Any changes in cable impedance

will cause a proportion of the pulse to be reflected. These reflections are

displayed as a trace on the instrument.

The TDR2000/2 can be used on any cable consisting of at least two

insulated metallic elements, one of which may be the armouring or screen

of the cable.

Dual inputs and large graphic display allow a wide range of comparative

tests to be performed between cable pairs and/or stored results.

The instrument has 15 memories, enabling test results to be displayed and

compared with “live or real time” results.

The download feature allows transfer of waveform data to and from a

computer, using the TraceMaster software, for analysis and storage for

future reference.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 4

The Instrument controls consist of the following.

L1 Input channel 1

L2 Input channel 2

*Only test leads supplied with the instrument should be used.

Contrast: Display contrast adjustment allows the user to adjust the

contrast of the LCD Display for optimum viewing comfort.

Tx Null: Allows the user to reduce the amplitude of the transmitted pulse

on the displayed trace, allowing reflections close to the startof the cable

(normally referred to as the “Dead Zone” to be identified. Refer to the

section on Tx Null for further details.

1. Save: Toggles the display between an active display and one of 15

stored memory locations.

Shift/Save: Initiates a save routine to store the currently displayed trace.

By saving to a memory location, traces can be recalled later.

USER CONTROLS AND DISPLAY

5

The display and controls of the TDR2000/2 have been ergonomically

arranged so that the instrument is easy to use.

The displayed information consists of the following:

(1) Selected channels

(2) Magnification or Zoom bar

(3) Range

(4) Reflected pulse

(5) Low battery indication

(6) Gain setting

(7) Cursor (Distance) bar

(8) Distance to cursor

(9) Velocity Factor

(10) Transmitted pulse

13

4

6

72

89

10

5

9

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 5

2. Cursor left: Moves cursor left, on the display. Auto repeats if held

down.

SHIFT/Cursor left – Dual cursor mode: Press with the SHIFT key to

select alternative cursor in dual cursor mode. Press the SHIFT and Cursor

key again to swap active cursors.

3. The Find key searches for the furthest major change of impedance.

This may be a fault or the end of the cable if this is a short or open

circuit hazardous voltage is present.

4. Cursor Right: Move cursor right, on the display. Auto repeats if held

down.

SHIFT/Cursor right – Dual cursor mode: Press with the SHIFTkey to

select alternative cursor in dual cursor mode. Press the SHIFTand Cursor

key again to swap active cursors.

5. L1-L2 Mode: Selects the test mode by cycling between L1, L2, L1 & L2,

and XTALK. The selected mode is shown in the top left of the display

screen.

SHIFT/Mode – Difference measurement: (L1-L2 or L1-M1, 2…15) To

display the difference between two channels the TDR must be in either

L1&L2 or L1&M#) modes. Press the MODE key with the SHIFT key

depressed. The instrument will display L1-L2, or L1-M1.

6. Download/Upload: Initiates the download or upload of stored results

between the TDR and the PC. Refer to the section on downloading later

in this user guide.

7. Range: Abi-directional key which adjusts the instruments

measurement range from 16 km (48 kft) down to 50 m (150 ft). Auto

repeats if held down. A full range of details can be found in the product

specification.

6

8Gain: Abi-directional key allowing adjustment of the instrument gain

from 0 dB to 90 dB in steps of 6 dB. Auto repeats if held down.

Refer to the Operation section for further details.

9. Velocity factor: Abi-directional key for setting of the cable velocity

factor in the range 0.300 to 0.999 of the speed of light. Auto repeats if

held down. Refer to the section on ‘Velocity factor’ for further

information.

10. Zoom: The ZOOM key toggles the display between the whole display

range and a zoomed in view. This allows more accurate positioning of

the cursor bar and hence the distance measured.

The modes are shown as ‘normal’ and ‘zoom’ at the top of the display

window.

SHIFT/Zoom – Intermittent mode: By pressing the ZOOM key with the

SHIFT button held down, the instrument switches to ‘Intermittent mode’.

While in this mode the TDR will accumulate any transient reflections as a

permanently displayed trace. To exit the Intermittent mode press the

ZOOM key with the SHIFT button down, or by change the range, gain or

mode settings.

11. Menu: Pressing the Menu key displays the instrument menu. For full

details, refer to the menu guide opposite.

12. On/Off: Switches instrument on and off.The instrument automatically

switches off after a default time of 5, 10 or 15 minutes, as set in the

configuration menu, or if the battery voltage is too low to continue

testing.

13. Shift: Used in combination with other keys to access alternative

modes.

14. Backlight key: Toggles backlight on or off.Backlight automatically

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 6

MENU

The MENU includes all those settings that would not be accessed in daily

use. To enter this mode press the MENU key. (11)

MENU

TEST RATE [1/s] [3/s]

PULSE WIDTH Dependant on range, refer to

specification

PULSE HEIGHT [3V] [5V] [14V]

AVERAGING [x1] [x2] [x3] [x4] [x5]

ZERO (ns) [0ns to 50ns in steps of 1ns]

POWERDOWN [5min] [10min] [15min]

DISPLAY (min) [1min] [2min] [5min]

LANGUAGE [ENGLISH, …]

VF UNITS [RATIO] [m/us] [ft/us]

DISTANCE UNIT [m] [ft] [ns]

50/60 Hz FILTER [ON] [OFF]

7

switches off after 1, 2 or 5 minutes (as set in the configuration menu).

15. Help Key: These screens provide help on the use of the TDR2000/2.

Press the help key followed by the function key on which you require

help.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 7

MENU definitions:

Test Rate: This sets the screen update rate to once per second or three

times per second.

Pulse Width: This option allows the user to override the default pulse

width set by the instrument for a particular measurement range and select

an alternative pulse width.

(See the Instrument Specification at the end of this user guide for full

details on the pulse options for each measurement range).

Pulse Height: Three pulse heights options exist. 3 V, 5 V and 14 V.

14 V is not available when the instrument test range is less than 400 m.

Averaging: When trying to locate cable features when a high gain is

required, any noise on the Cable Under Test (C.U.T) will be amplified as

well as the reflected pulse. This noise may make accurate location of the

cable feature more difficult. To overcome this, the instrument has the

ability to average two or more results. Any noise will be reduced. Options

of 1x, 2x, 3x or 4x over-sampling can be set in the MENU.

Zero (ns): This setting enables the zero point of the instrument to be set

at the end of the test leads, so the test lead length is automatically

deducted from any distance calculation. The nominal zero point setting for

the standard test leads is 20 ns, however to zero non standard test leads

proceed as below:

1 Set the instrument measurement range to 50 metres.

2 Enter the MENU (key 11)

3 Set the Distance Units to ns.

4 Set the ZERO (ns) to 0.

5 Press the MENU key again to exit the configuration menu.

6 Select display mode L1

7 Measure the time (in ns) to the ends of the test leads. To

identify this point on the trace open circuit and close circuit the

end of the test leads and note the distance.

8 Enter the MENU again (key 11).

9 Set the ZERO (ns) to the measured time.

All measured distances will now be shown relative to the end of the test

leads.

Power down: Allows the user to set the automatic power-down to 5, 10

or 15 minutes after the last key press.

Display: Switches off the backlight after a pre-defined period, 1, 2 or 5

minutes.

Language: This allows the user to select the language required, from

English (default) to French, German, Spanish, Italian. Other languages can

be downloaded from the Tracemaster CD supplied with the instrument.

VF Unit: The velocity factor (VF) can be displayed as a ratio of pulse

speed to the speed of light, or as a distance per microsecond in either feet

or metres. Refer to the Velocity Factor section for more details.

Distance Unit: The distance to cursor measurement can be displayed in

metres [m], feet [ft] or in time, eg [ns].

50/60Hz Filter: If ON, a power supply frequency filter is switched on.

8

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 8

Initial Power Up and Configuration

The first time the TDR2000/2 is switched on the operator will be asked to

choose a language. There are five languages (English, French, German,

Spanish and Italian) stored in the instrument. The selected language will

become the default language for the instrument.

Asixth language is ‘user definable’ and can be uploaded from the

Tracemaster CD.

Uploading languages

In Tracemaster:

nSelect UPLOAD LANGUAGE FILE from the OPTIONS menu

nSelect a language and press OPEN.

On the instrument:

nConnect the communication lead from the serial connector of

the TDR/CFL to the serial port of the PC.

nSwitch on the TDR2000/2

nPress UPLOAD/DOWNLOAD key

The selected language should now transfer to the TDR2000/2.

OPERATION

9

Battery Fitting and Replacement

For TDR2000/2

When the battery low symbol appears in the display window

the cells are nearly exhausted and should be replaced as soon as possible.

Use alkaline cells IEC LR6 (AA) 1.5 V or 1.2 V rechargeable cells only.

To install or replace the cells, switch the instrument off. Disconnect the

test leads, loosen the battery cover retaining screws and remove the cover.

Lift out and disconnect the battery holder. Replace the cells, ensuring that

correct polarity is observed (shown on the battery holder).

Incorrect battery cell polarity can cause electrolyte leakage resulting in

damage to the instrument

Refitting the battery holder is the reverse of removing it.

For TDR2000/2R, TDR2000/2RM and TDR2000/2P

When the battery low symbol appears, switch off the unit.

Connect the Battery charger to the TDR charger socket. Switch on the

Charger. Allow 14 hours to fully charge the TDR2000/2R.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 9

cursor to the start of the first reflection. To position the cursor more

accurately, press the ZOOM key (10) to zoom into the current cursor

position. The cursor is now fixed and using the cursor keys, the trace will

move relative to that point. The current zoom location with respect to the

whole trace range is shown at the top of the display. The distance is then

directly read from the display.

Notes

Cursor: All distance measurements are made to the vertical cursor. By

moving the cursor left or right the distance displayed will increase or

decrease.

Dual cursor: Enabled by pressing the SHIFT and CURSOR LEFT key or

SHIFT and CURSOR RIGHT keys. In dual cursor mode, the distance to the

active cursor is displayed together with the difference between the two

cursors.

If no significant reflections can be seen use the “Tx Null” adjustment to

minimise the effect of the output pulse on any potential “near end” faults.

(If no reflections can be seen, try shorting (or earthing) the far end of the

cable to ensure that you are “seeing” the whole length of the cable. )

The distance to the fault can then be directly read from the display.

NOTE: The distance calculation is performed using the velocity factor

(VF) set in the TDR. If this velocity factor is not correct for the cable under

test, the displayed distance will be incorrect.

USING THE TDR2000

Switch on the instrument. The TDR2000/2 will display the Megger logo for

a few seconds, followed by a trace. Set an appropriate RANGE and Velocity

Factor (keys 7 and 9) for the cable to be tested. Refer to ‘Velocity factor’

later.

Connection to Cable Under Test

Connect the test lead to the cable under test. Connection may be made to

a live system with a voltage to earth (ground) less than 300 V with an

installation (over voltage) category of III or lower. This means that the

instrument may be connected to any fixed wiring of a building installation,

but not to primary supply circuits such as overhead cables. A Fused Lead

Set must be used to connect to energised live systems. Refer to the

accessories section for options.

Measuring distance to fault

The Find key searches for the furthest major change of impedance.

This may be a fault or the end of the cable if this is a short or open circuit.

When found the event is displayed and the cursor placed on the leading

edge. The gain, zoom and cursor position may need to be adjusted for

accurate measurement. Note that Find does not adjust the Tx Null or

Velocity Factor.

Ensure that the total length of the cable can be seen on the display, and

that the range selected is correct.

To enable ‘difficult to see’ faults (small reflection) to be identified, the gain

of the instrument can be adjusted, key (8). With the gain at minimum

small changes of cable impedance may be overlooked. by increasing the

gain the fault becomes more obvious. Adjust the gain until all major

reflections can be easily identified.

Using the CURSOR LEFT and CURSOR RIGHT keys (2 and 4) move the

10

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 10

11

Below are shown two typical trace displays. The left trace shows an open

circuit at 1.200 km away; the second, a short circuit at 1.200 km away.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 11

If the velocity factor of the cable under test (C.U.T) is not known, it may

be accurately established by:

nTesting a known length of cable, locate the reflection for the end

of the cable on the display. Use the shortest possible range setting.

nUse the ZOOM button to accurately position the distance cursor.

nAdjust the velocity factor of the TDR using the VF key (4) until the

TDR displays the correct length of cable.

nMakeanote the VF value for future reference.

The table of velocity factors in the HELP pages of the instrument is a

rough guide and in practice, the settings are subject to many variable

factors. By using the previous procedure on a known length of cable, a

more accurate VF can be established.

The measurement of the distance to the fault can now be made with more

confidence that the measurement will be correct. The ability of the

instrument to accurately measure the distance to a cable feature relies on

the velocity factor being correct, any errors in the velocity factor are

directly proportional to distance measurement errors. Hence, the

instrument uses the velocity factor to three decimal places to reduce any

errors.

Pulse Widths

As the RANGE of the TDR is adjusted (Key 7) so the duration of the

transmitted pulse changes. Each of the instrument ranges has a default

pulse width. The pulse widths vary from 7 ns to 16 µs. The greater the

range set on the TDR, the wider the transmitted pulse.

Atshortrange, a shortpulse width will have good resolution. As the test

range increases, cable attenuation prevents distant faults from being seen.

The default pulse width can be changed. To change the pulse default

INSTRUMENT FEATURES

12

Tx Null

Without the “Tx Null” control, the transmitted pulse would be visible at

the beginning of the trace, swamping any reflections within the pulse

length (the dead zone). The ‘Tx Null’ circuit matches the characteristic

impedance of the cable under test to produce an equivalent pulse.

Subtracting this equivalent pulse from the transmitted pulse effectively

removes the dead zone from the display and allows “near end” reflections

to be seen.

NOTE: In some cases, it will be impossible to completely null the

transmitted pulse.

Alternatively, using the L1-L2 mode, where L2 is connected to a known

good length of the cable under test, L2 is used instead of the balancing

circuit to automatically null the transmitted pulse. In this case only the

difference between the good line and the bad line will be displayed.

Velocity Factor

The velocity factor is used by the instrument to convert the measured time

for a pulse to be reflected, into a distance. It can be displayed as a ratio of

the speed of light (eg 0.660 = 66% of the speed of light), or as a distance

per microsecond in ft/us or m/us.

No Tx Null Adjusted Tx Null

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 12

the GAIN key (8).

A recalled trace can be compared with L1 by pressing the MODE key. Press

SHIFT and MODE together to switch between displaying L1&M and L1-M.

The range, gain and pulse width are recalled and automatically set to the

stored values, and it will not be possible to change these when showing a

stored trace. However, the cursor can be re-positioned, ZOOM mode

selected and the velocity factor changed so that full analysis of the stored

trace may be made.

To exit trace recall mode press the SAVE key.

Downloading to a PC

To download the stored trace to a PC, connect the TDR2000/2 to the PC

using the null modem download lead, supplied with the instrument.

To set the instrument to data transfer mode, hold down the SHIFT key

(13) and press the PC key (6). The TDR2000/2 is ready to send or receive

data.

Run TRACEMASTER on the computer and set to receive data (refer to your

Tracemaster help file for full details). All stored traces will be copied to the

computer. The stored trace can be annotated and kept on file for future

reference.

width, refer to the menu section of this user guide.

Pulse Height

Three pulse height options are available: 3 V, 5 V and 14 V pk-pk, although

14 V pulses are not available when the instrument test range is less than

400 m. By increasing the pulse height the displayed reflections are larger

hence easier to identify. However, large pulse heights may ‘skip’ faults,

especially those close to the instrument.

Trace Storage (M1 to M15)

The TDR2000/2 has 15 memory locations, which can be used to save

traces. These may be stored for future analysis or downloaded to the

TRACEMASTER software for analysis on a PC. Each memory location stores

the graphical trace along with the test parameters, gain, range and mode

settings.

Saving a trace

With the desired trace visible on the display, hold down the SHIFT key

together with the SAVE key.

The display should display a memory location in the top left corner of the

screen and ‘SAVE MODE’. Press SHIFTand SAVE.

With the extensive dual trace and difference modes available to the

TDR2000/2, memory locations can be used as comparisons for live traces.

This is useful if the known good cores that would normally be used in the

L1-L2 mode are two far away from the C.U.T. Instead, a memory trace of a

known good cable can be compared against the C.U.T.

Recalling a trace

From any of the display modes L1, L2, L1&L2, etc, press the SAVE key. The

instrument will display the trace in memory location M1 or other

previously selected location. The range and gain settings are also recalled.

Toscroll through all memorylocations, press the UP or DOWN arrow on

13

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 13

To improve the accuracy of a measurement, numerous techniques can be

used, depending on the situation encountered. Not every situation can be

described, but the following points are effective and the most common

and easily implemented methods.

For accurate location and before undertaking any tests the route of the

cable under test should be known. It should be remembered that cables

are not straight as they twist/uncoil during installation and they are often

coiled at either end..

If the route is unknown, tracing it may also give you an indication of any

third party damage – however this in itself can be misleading!

Test the cable from both ends

When fault finding a cable it is good practice to take measurements from

both ends. Particularly in the case of open circuit faults, when the true end

of the cable is not visible. If the measurement is made from both ends,

then the combined answer should equal the expected length of the cable.

Even when the true end of the cable is visible on the display, the

reflections after the fault may be too obscure to analyse clearly. In this

case, measurement from both ends yields a clearer picture as well as

improved accuracy.

TECHNIQUES TO IMPROVE ACCURACY

14

Uploading from a PC

To upload a trace to the instrument using the TRACEMASTER software the

procedure is the same as downloading.

To set the TDR2000/2 to data transfer mode, hold down the shift key (13)

and press the UPLOAD/DOWNLOAD key (6). The TDR2000/2 is ready to

send or receive data.

To set Tracemaster to transfer data, refer to the TRACEMASTER help file.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 14

Except where otherwise stated, this specification applies at an ambient

temperature of 20°C.

General

Ranges: 50 m, 100 m, 200 m, 400 m, 1 km, 2 km,

4km, 8 km, 16 km, (150 ft, 300 ft, 600 ft,

1200 ft, 3000 ft, 6000 ft, 12000 ft, 24000 ft,

48000 ft)

Resolution: 0.1 m (4 inches) up to 200 m/600 ft

0.2 m up to 400 m/1200 ft

0.1% of range above 400 m/1200 ft

Measurement Accuracy: 0.1% of Range

[Note – The measurement accuracy is for the indicated cursor position

only and is conditional on the velocity factor being correct]

Input Impedance: 120 Ω

Input Protection: 300 V CATIII working. (415 V phase to

Phase)

Output Pulse Amplitude: Nominal 3 V, 5 V and 14 Vpk to pk

into an open circuit

Pulse width user selectable:

50 m range: 7 ns 20 ns 40 ns 60 ns 80 ns

100 m range: 7 ns 40 ns 60 ns 80 ns 100 ns

200 m ranges: 7 ns 40 ns 80 ns 140 ns 200 ns

400 m range: 40 ns 80 ns 160 ns 200 ns 400 ns

1 km range: 80 ns 160 ns 260 ns 500 ns 1 s

2 km range: 160 ns 260 ns 500 ns 1 µs 2 µs

4 km range: 240 ns 500 ns 1 µs 2 µs 4 µs

8 km range: 500 ns 1µs 2 µs 4 µs 8 µs

16 km range: 1 µs 2 µs 4 µs 8 µs 16 s

SPECIFICATIONCARE AND MAINTENANCE

Other than replacing the batteries, the instrument has no user serviceable

parts. In the event of failure the instrument should be returned to your

supplier or an approved Megger repair agent.

Cleaning the instrument should only be done by wiping with a clean cloth

dampened with soapy water or Isopropyl Alcohol (IPA).

15

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 15

BATTERY CHARGER

Supply voltage:

European Version 230 V a.c. 10% 50 Hz

North American Version 115 V a.c. 10% 60 Hz

Safety:

This instrument complies with IEC 61010-1 for connection to live

systems up to 300 V CAT III with fused leads. (415 V phase to phase)

EMC

The instrument will comply with EN 61326-1, classified as ‘class B’. If

connected to a live domestic power supply, the operation of this

instrument could cause interference with other equipment connected to

the same supply.To reduce this interference, select the lowest voltage and

narrowest width pulse as consistent with accurate measurement.

Mechanical

The instrument is designed for use indoors or outdoors and is rated to

IP54.

Case Dimensions: 250 mm long

200 mm wide

110 mm deep

Instrument weight: 1.5kg (3.3lbs)

Case material: ABS

Connectors: Two pairs of 4mm safety terminals.

9 way D-type connector for serial communication.

Display: 320 x 240 pixel eight colour or

monochrome backlight LCD.

(Default pulse width for each range underlined)

Gain: 0 to 90 dB in steps of 6 dB

Velocity Factor: Variable from 0.300 to 0.999 in steps of 0.001

Tx Null: 0 Ωto 120 Ω

Test Modes: L1, L2, L1-L2, L1&L2, M, L1-M, L1&M

Screen Update Rate: Once per second or three times per second, (user

selectable).

Power Down: Automatic after 5, 10 or 15 minutes with no

keys pressed, (user selectable).

Communications Port:

RS-232C compatible

1start bit, 8 data bits, 1 stop bit and no

parity, 19200 baud standard

Internal Memory: Storage capacity of 15 waveforms and data

Batteries:

TDR2000/2 Eight LR6 (AA) type batteries, manganese-alkali or

nickel-cadmium or nickel-metal-hydride cells.

TDR2000/2RM Nominal voltage: 12 V for Alkali or 9.6 V for NiCad

&TDR2000/2P and NiMH.

16

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 16

Environmental

TDR2000/2

Operational Temperature: -15°C to +50°C (5°F to 122°F)

Storage Temperature -20°C to +70°C (-4°F to 158°F)

TDR2000/2R/2RM/2P

Operational Temperature: -15°C to +45°C (5°F to 113°F)

Storage Temperature -20°C to +45°C (-4°F to 113°F)

Charging should not take place when the ambient temperature is less than

0°C (+32°F)

Humidity

<95% at +40°C non-condensing

Included Accessories

Test and carry Pouch 6420-114

Serial data lead 25955-025

Miniature Clip Test Lead Set 6231-654

Carry Strap for Pouch 6220-611

Tracemaster software 6111-458

User Guide 6172-662

“Bed of Nails” Test lead set (see note 2) 6231-655

Battery Charger See Supplier

Optional Accessories

Fused lead set (see note 1) 6111-218

TDR2000/2R, TDR2000/2RM, TDR2000/2P ONLY

UK Version 6121-548

USA 6121-539

European 6121-605

(1) Two lead sets required for 2 channel measurements.

(2) Only supplied with the North American version.

ACCESSORIES

17

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 17

Approved Repair Companies

Anumber of independent instrument repair companies have been

authorised for repair work on most Megger instruments, using genuine

Megger spare parts. Consult the Appointed Distributor/Agent regarding

spare parts, repair facilities, and advice on the best course of action to

take.

Returning an Instrument for Repair

If returning an instrument to the manufacturer for repair, it should be sent

freight pre-paid to the appropriate address. A copy of the invoice and of

the packing note should be sent simultaneously by airmail to expedite

clearance through Customs. A repair estimate showing freight return and

other charges will be submitted to the sender, if required, before work on

the instrument commences.

REPAIR AND WARRANTY

18

The instrument contains static sensitive devices, and care must be taken in

handling the printed circuit board. If an instrument’s protection has been

impaired it should not be used, but sent for repair by suitably trained and

qualified personnel.

The protection is likely to be impaired if for example; it shows visible

damage; fails to perform the intended measurements; has been subjected

to prolonged storage under unfavourable conditions, or has been

subjected to severe transport stresses.

NEW INSTRUMENTS ARE GUARANTEED FOR 3 YEARS FROM

THE DATE OF PURCHASE BY THE USER.

NOTE: Any unauthorized prior repair or adjustment will automatically

invalidate the Warranty.

INSTRUMENT REPAIR AND SPARE PARTS

For service requirements for Megger Instruments contact:

Megger Limited or Megger Inc.

Archcliffe Road Valley Forge Corporate Centre

Dover 2621 Van Buren Avenue

Kent, CT17 9EN. Norristown, PA 19403

England. U.S.A.

Tel: +44 (0) 1304 502 243 Tel: +1 (610) 676-8579

Fax: +44 (0) 1304 207 342 Fax: +1 (610) 676-8625

or an approved repair company.

TDR2000_2_6172-662_UG_en_V06.qxp 24/9/09 11:44 am Page 18

M

TDR2000/2, TDR2000/2R, TDR2000/2RM &

TDR2000/2P

Time Domain Reflectometer

GUIDE DE L’UTILISATEUR

GAVERTISSEMENTS DE SECURITE

nL’instrument satisfait aux exigences de sécurité de la norme IEC 61010 partie 1 à 300V CAT III.

nBien que ce testeur ne génère pas de tensions dangereuses, les circuits auxquels on peut le connecter pourraient être dangereux en raison

des risques d’électrocution ou d’arc électrique (initiés par court-circuit). Bien que tous les efforts aient été faits par le fabricant pour

réduire les risques, l’utilisateur doit assumer la responsabilité d’assurer sa propre sécurité.

nPour l’utilisation sur des systèmes en service jusqu’à 300V, Installation de Catégorie III*, utiliser le jeu de pinces à fusible

Megger réf. 6111-218.

nSe rapporte aux surtensions transitoires que l’on risque de rencontrer dans les installations de câblage fixes. ATTENTION (Risque de

décharge électrique)

Fiche de 4mm sur adaptateur BNC:

nCette fiche de 4mm sur adaptateur BNC est censée ne servir qu’avec les câbles des réseaux de télécoms, elle n’est pas conçue ni prévue pour

un branchement direct sur une alimentation secteur sous tension. Cependant, en utilisation normale, elle peut être soumise aux tensions des

réseaux de télécoms (TRT) telles que définies par la norme IEC 60950 3ème édition (1999-04).

nLa fiche et la prise BNC sont, par nécessité, accessibles. La gaine extérieure de ce connecteur est normalement à des niveaux de tension SELV

(tensions ultra basses de sécurité) ; cependant, dans des conditions de simple défaut, elle peut véhiculer des tensions dangereuses.

L’opérateur doit donc vérifier que la fiche ou la douille accessibles présentent des niveaux de tension SELV avant de les toucher, ou bien il

devra porter les gants isolés appropriés.

nL’instrument ne devra pas être utilisé si l’une de ses pièces est endommagée.

nLes cordons d’essais, sondes et pinces crocodile doivent être en bon état, propres et sans isolation cassée ou fissurée.

nVérifier que tous les branchements des cordons sont corrects avant de procéder aux essais.

nUn jeu de cordons à fusible doit être utilisé pour se connecter aux systèmes sous tension. Se reporter à la section Accessoires pour les

options.

nDéconnecter les cordons d’essais avant d’accéder au compartiment des piles.

nSe reporter aux instructions d’utilisation pour plus d’explications et les précautions à suivre.

nLes Avertissements de sécurité et Précautions doivent être lus et compris avant d’utiliser l’instrument. Ils doivent être observés en cours

d’utilisation.

20

NOTE

L’INSTRUMENT NE DOIT ETRE UTILISE QUE PAR DES PERSONNES COMPETENTES ET CONVENABLEMENT FORMEES.

Sidan laddas...

Megger ME-TDR2K2R Bruksanvisning

Denna manual är också lämplig för

Megger ME-TDR2K2R Bruksanvisning

på andra språk

Andra dokument