TDR500 - Meter Megger - Free user manual and instructions

Product Type	Time Domain Reflectometer (TDR)
Brand	Megger
Model	TDR500
Dimensions	230 mm x 115 mm x 48 mm (9 x 4.5 x 2 inches)
Weight	0.6 kg (1.32 lbs)
Case Material	ABS
Connectors	BNC Terminal
Display	122 x 32 pixel Graphics LCD
IP Rating	IP54
Operating Temperature	-15°C to +50°C (5°F to 122°F)
Storage Temperature	-20°C to 70°C (-4°F to 158°F)
Power Supply	Six LR6 (AA) batteries (alkaline or NiCad/NiMH)
Nominal Voltage	9 V (alkaline) or 7.2 V (NiCad)
Battery Life	Approximately 30 hours continuous use
Measurement Ranges	30 m, 100 m, 300 m, 1000 m, 3000 m (100 ft, 300 ft, 1000 ft, 3000 ft, 10000 ft)
Accuracy	±1% of range ±1 pixel at 0.67 VF
Resolution	1% of range
Output Pulse	5 V pk-pk into open circuit from 100 Ω source
Warble Frequency	Alternating 810 Hz and 1110 Hz
Velocity Factor Range	0.01 to 0.99 in steps of 0.01
Automatic Power Off	After 5 minutes of inactivity
Safety	For use on unenergised cables only
EMC Compliance	BS EN 61326-1, minimum performance 'B'
Included Accessories	Test & carry case with strap, lead set (300 mm with croc clips), user guide

Frequently Asked Questions - TDR500 Megger

Can the Megger TDR500 be used on live cables?

No, the instrument is strictly for use on unenergised cables only. Using it on live cables may cause damage or injury.

What type of batteries does the TDR500 require?

It uses six LR6 (AA) batteries, which can be alkaline, nickel-cadmium, or nickel-metal-hydride cells.

How do I change the velocity factor setting?

Press the Velocity Factor (VF) key and adjust using the range controls. The value can be set from 0.01 to 0.99 in steps of 0.01.

What is the warble function used for?

The warble function emits an alternating tone (810 Hz and 1110 Hz) to help trace cables in a bundle or behind walls.

How long does the battery last on a full charge?

Typical battery life is approximately 30 hours of continuous use, depending on battery type and usage.

What measurement ranges are available?

The TDR500 offers ranges of 30 m, 100 m, 300 m, 1000 m, and 3000 m (or 100 ft, 300 ft, 1000 ft, 3000 ft, 10000 ft).

How accurate is the distance measurement?

Accuracy is ±1% of the selected range ±1 pixel at a velocity factor of 0.67, assuming the correct VF is set.

Is the TDR500 waterproof?

It has an IP54 rating, meaning it is splash-proof and dust-resistant, but not waterproof. Avoid submersion.

What should I do if the instrument does not power on?

Check the batteries: ensure they are installed correctly and have sufficient charge. The low battery indicator blinks when voltage drops below 6.5 V.

Where can I find the user manual for the TDR500?

The manual can be downloaded for free from notice-facile.com or the Megger website (www.megger.com).

USER MANUAL TDR500 Megger

The instrument is designed for use indoors or outdoors and is rated to IP54.

Case Dimensions 230mm long (9 inches)

115mm wide (4.5 inches)

48mm deep (2 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 -15

°C to +50°C(5°F to 122°F)

Storage Temperature

-20°C to 70°C(-4°F to 158°F)

Ordering Information

TDR 500

Included Accessories

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

Megger

Megger Limited

Archcliffe Road, Dover

Kent CT17 9EN England

T [phone]

F [phone]

E [e-mail]

Megger

Z.A. Du Buisson de la Couldre

23 rue Eugène Henaff

78190 TRAPPES France

4271 Bronze Way, Dallas,

Texas 75237-1019 USA

T [phone] (USA ONLY)

T [phone]

F [phone]

E [e-mail]

This instrument is manufactured in the United Kingdom.

The company reserves the right to change the specification or design

without prior notice.

Megger is a registered trademark

Part No 6172-726 V02 Printed in England 1105

www.megger.com

OPEN CONDUCTOR
SHORTED CONDUCTOR
SPLICE
BRIDGE TAP
SPLIT/ RESPLIT
WET SPLICE/ WATER
FRAYED CABLE
WATER INGRESS
TAP

Megger

TDR500 User Guide

TIME DOMAIN

REFLECTOMETER

TYPICAL CABLE VELOCITY FACTORS

Main Type	Sub Type Velocity Factor
Twisted Pair	Polyethylene	0.67
	Jelly Filled Polyethylene	0.64
	PTFE (Teflon)	0.71
	Paper (Pulp 0.083uf/mile)	0.72
	Paper (Pulp 0.072uf/mile)	0.88
Co-ax	Foam Polyethylene	0.82
	Air Spaced Co-axial	0.94
	Air	0.98
	Solid Polyethylene	0.67

TELECOMMUNICATIONS CABLES

Plc	19 AWG 0.72	Pulp	22 AWG 0.67/0.71
	22 AWG 0.67		24 AWG 0.68
	24 AWG 0.66		26 AWG 0.66
	26 AWG 0.65
		Service Wire	0.64
Gel filled	19 AWG 0.68
	22 AWG 0.62
	24 AWG 0.60
	26 AWG 0.58

SAFETY WARNINGS

•This instrument is not to be used on
energised cable
- The instrument should not be used if any part of it is damaged.
- Disconnect the test leads before accessing the battery compartment.
•Refer to operating instructions for further explanation and precautions.
- Safety Warnings and Precautions must be read and understood before the instrument is used. They must be observed during use.

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

Megger

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

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/ s or ft/ s.

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.

SPECIFICATION

Except where otherwise stated, this specification applies at an ambient temperature of 20^ C.

General

Ranges 30m, 100m, 300m, 1000m, 3000m. (100ft, 300ft, 1000ft, 3000ft, 10,000ft.)

Accuracy ± 1% of range ± pixel at 0.67VF [Note:- the measurement accuracy is for the indicated cursor position only and is conditional on the velocity factor being correct.]

Resolution 1% of range.

Input Protection For connection to unenergised cable only.

Output Pulse 5 volts peak to peak into open circuit from 100Ω source. Pulse widths determined by range and cable impedance.

Gain Automatic with gain and range.

Velocity Factor Variable from 0.01 to 0.99 in steps of 0.01.

Refresh Rate Three times a second.

Power Down Automatic after 5 minutes with no key press.

Warble 5V pk-pk from 100Ω, alternating between 810Hz and 1110Hz.

Batteries Six LR6 (AA) type batteries, Manganese-alkali or nickel-cadmium or nickel-metal-hydride cells.

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

Battery Consumption 100mA nominal. (30 hours' continuous use.)

Safety This instrument is to be used on unenergised cable only.

EMC Complies with Electromagnetic Compatibility Specifications (Light industrial) BS EN 61326-1, with a minimum performance of 'B' for all immunity tests.