Megger ME-TDR2K2R Bruksanvisning

Typ
Bruksanvisning

Denna manual är också lämplig för

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
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 to 120
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.
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4
  • Page 5 5
  • Page 6 6
  • Page 7 7
  • Page 8 8
  • Page 9 9
  • Page 10 10
  • Page 11 11
  • Page 12 12
  • Page 13 13
  • Page 14 14
  • Page 15 15
  • Page 16 16
  • Page 17 17
  • Page 18 18
  • Page 19 19
  • Page 20 20
  • Page 21 21
  • Page 22 22
  • Page 23 23
  • Page 24 24
  • Page 25 25
  • Page 26 26
  • Page 27 27
  • Page 28 28
  • Page 29 29
  • Page 30 30
  • Page 31 31
  • Page 32 32
  • Page 33 33
  • Page 34 34
  • Page 35 35
  • Page 36 36
  • Page 37 37
  • Page 38 38
  • Page 39 39
  • Page 40 40
  • Page 41 41
  • Page 42 42
  • Page 43 43
  • Page 44 44
  • Page 45 45
  • Page 46 46
  • Page 47 47
  • Page 48 48
  • Page 49 49
  • Page 50 50
  • Page 51 51
  • Page 52 52
  • Page 53 53
  • Page 54 54
  • Page 55 55
  • Page 56 56
  • Page 57 57
  • Page 58 58
  • Page 59 59
  • Page 60 60
  • Page 61 61
  • Page 62 62
  • Page 63 63
  • Page 64 64
  • Page 65 65
  • Page 66 66
  • Page 67 67
  • Page 68 68
  • Page 69 69
  • Page 70 70
  • Page 71 71
  • Page 72 72
  • Page 73 73
  • Page 74 74
  • Page 75 75
  • Page 76 76
  • Page 77 77
  • Page 78 78
  • Page 79 79
  • Page 80 80
  • Page 81 81
  • Page 82 82
  • Page 83 83
  • Page 84 84
  • Page 85 85
  • Page 86 86
  • Page 87 87
  • Page 88 88
  • Page 89 89
  • Page 90 90
  • Page 91 91
  • Page 92 92
  • Page 93 93
  • Page 94 94
  • Page 95 95
  • Page 96 96
  • Page 97 97
  • Page 98 98
  • Page 99 99
  • Page 100 100
  • Page 101 101
  • Page 102 102
  • Page 103 103
  • Page 104 104
  • Page 105 105
  • Page 106 106
  • Page 107 107
  • Page 108 108
  • Page 109 109
  • Page 110 110
  • Page 111 111
  • Page 112 112
  • Page 113 113
  • Page 114 114
  • Page 115 115
  • Page 116 116
  • Page 117 117
  • Page 118 118
  • Page 119 119
  • Page 120 120
  • Page 121 121
  • Page 122 122
  • Page 123 123
  • Page 124 124
  • Page 125 125
  • Page 126 126
  • Page 127 127
  • Page 128 128
  • Page 129 129
  • Page 130 130
  • Page 131 131
  • Page 132 132
  • Page 133 133

Megger ME-TDR2K2R Bruksanvisning

Typ
Bruksanvisning
Denna manual är också lämplig för