Megger TDR500 Operating Manual

Mechanical

he instrument is designed for use indoors or outdoors and is

T
rated to IP54.

OPEN
CONDUCTOR

TDR500 User Guide

Case Dimensions 230mm long (9 inches)

Instrument Weight 0.6kg (1.32lbs)

Case Material ABS

Connectors BNC Terminal

Test Lead 300mm long with croc clips.

Display 122 x 32 pixel Graphics LCD.

Environmental

Operational Temperature -15OC to +50OC

Storage Temperature -20

Ordering Information

TDR 500

Included Accessories

Test & Carry case with strap 6420-125
Lead Set 6231-694
User Guide 6172-726

Megger Limited
Archcliffe Road, Dover
Kent CT17 9EN England
T [phone]
F [phone]
E [e-mail]

Megger
4271 Bronze Way, Dallas,
Texas 75237-1019 USA
T [phone] (USA
T [phone]
F [phone]
E [e-mail]

115mm wide (4.5 inches)

8mm deep (2 inches)

4

O

(5

F to 122OF)

O

C to 70OC

O

(-4

F to 158OF)

Megger
Z.A. Du Buisson de la Couldre
23 rue Eugène Henaff
78190 TRAPPES France
T +33 (0)1 30.16.08.90
F +33 (0)1 34.61.23.77
E [e-mail]

ONLY)

SHORTED
CONDUCTOR

SPLICE

BRIDGE TAP

SPLIT/
RESPLIT

WET SPLICE/
WATER

FRAYED
CABLE

WATER
INGRESS

TAP

TIME DOMAIN
REFLECTOMETER

TYPICAL CABLE VELOCITY FACTORS

Main Type

Twisted Pair

Co-ax

Plc

Gel filled

● This instrument is not to be used on

● The instrument should not be used if any part

● Disconnect the test leads before accessing

● Refer to operating instructions for further

● Safety Warnings and Precautions must be read

NOTE: THE INSTRUMENT MUST ONLY BE USED BY

Sub Type Velocity Factor

Polyethylene
Jelly Filled Polyethylene
PTFE (Teflon)
Paper (Pulp 0.083uf/mile)
Paper (Pulp 0.072uf/mile)

Foam Polyethylene
Air Spaced Co-axial
Air
Solid Polyethylene

0.67

0.64

0.71

0.72

0.88

0.82

0.94

0.98

0.67

TELECOMMUNICATIONS CABLES

19 AWG 0.72
22 AWG 0.67
24 AWG 0.66
26 AWG 0.65

19 AWG 0.68
22 AWG 0.62
24 AWG 0.60
26 AWG 0.58

Pulp

Service Wire

22 AWG 0.67/0.71

SAFETY WARNINGS

energised cable.

of it is damaged.

the battery compartment.

explanation and precautions.

and understood before the instrument is used.

must be observed during use.

They

SUITABLY TRAINED AND COMPETENT PERSONS

24 AWG 0.68
26 AWG 0.66

0.64

This instrument is manufactur
The company r
without prior notice.

Megger is a registered trademark

Part No 6172-726 V02 Printed in England 1105
www.megger.com

eserves the right to change the specifi

ed in the United Kingdom.

cation or design

SPLITTER

Megger Limited
Archcliffe Road, Dover
Kent CT17 9EN England
T [phone]
F [phone]
E [e-mail]

VF

232.1m

0.67R

VF

SPECIFICATION

xcept where otherwise stated, this specification applies at an

E
ambient temperature of 20

General

O

C.

+

Battery State Indicator

Blinking signal gives the warning of low
battery indicating when the battery volts
drop to 6.5V.

Cursor Position

This indicates the current cursor position in
metres or feet.

Velocity Factor Indicator

Indicates the current velocity factor as either
a ratio of the speed of light (R), or as m/µs

µs.

or ft/

Menu

The menu allows the units of the distance
and velocity factor to be changed.

To enter the menu, switch the instrument on
holding down the warble key.

To change the displayed units, press one of
the velocity factor keys. The options
available are m and Ratio, m and m/us,
ft and Ratio and ft and ft/us.

When selected, either switch the instrument
off, or press the warble key to start testing.

Cursor Left

This control moves the cursor to the left.

Range

This is a bi-directional range control. Press the left
side to decrease the gain, right side to increase.

Cursor Right

This control moves the cursor to the right.

Power

Pressing this button will turn the instrument on or
off depending on the current state.

Velocity Factor

Use this key to change the velocity factor to a
suitable value for the cable under test.

Warble

Press to select the warble functions, or to return to
TDR functions. Warble function can be used to
trace cables.

Ranges 30m, 100m, 300m, 1000m, 3000m.

ccuracy ± 1% of range ± pixel at 0.67VF

A

Resolution 1% of range.

Input Protection For connection to unenergised cable

Output Pulse 5 volts peak to peak into open circuit

Gain Automatic with gain and range.

Velocity Factor Variable from 0.01 to 0.99

Refresh Rate Three times a second.

Power Down Automatic after 5 minutes

Warble 5V pk-pk from 100Ω, alternating

Batteries Six LR6 (AA) type batteries,

Nominal Voltage 9V for Alkali or 7.2V for NiCad.

Battery Consumption 100mA nominal.

(100ft, 300ft, 1000ft, 3000ft, 10,000ft.)

Note:- the measurement accuracy is

[
for the indicated cursor position only
and is conditional on the velocity factor
being correct.]

only.

from 100Ω source. Pulse widths
determined by range and cable
impedance.

in steps of 0.01.

with no key press.

between 810Hz and 1110Hz.

Manganese-alkali or nickel-cadmium
or nickel-metal-hydride cells.

(30 hours’ continuous use.)

Safety This instrument is to be used on

unenergised cable only

EMC Complies with Electromagnetic

Compatibility Specifi
(Light industrial) BS EN 61326-1,with a
minimum performance of ‘B’
immunity tests.

.

cations

for all