Megger MCT105 Manuale utente
MCT105
Cable Tracer and Fault Locator
User Guide
This document is copyright of:
Megger Limited, Archcliffe Road, Dover, Kent CT17 9EN. ENGLAND
T +44 (0)1304 502101 F +44 (0)1304 207342 www.megger.com
Megger Ltd reserves the right to alter the specification of its products from time to time without
notice. Although every effort is made to ensure the accuracy of the information contained
within this document it is not warranted or represented by Megger Ltd. to be a complete and
up - to - date description.
For Patent information about this instrument refer to the following web site:
megger.com/patents
www.megger.com
2
Declaration of Conformity
Hereby, Megger Instruments Limited declares that radio equipment manufactured by Megger Instruments
Limited described in this user guide is in compliance with Directive 2014/53/EU. Other equipment manufactured
by Megger Instruments Limited described in this user guide is in compliance with Directives 2014/30/EU and
2014/35/EU where they apply.
The full text of Megger Instruments EU declarations of conformity are available at the following internet address:
megger.com/company/about-us/eu-dofc
This manual supersedes all previous issues of this manual. Please ensure that you are using the most recent issue
of this document. Destroy any copies that are of an older issue.
www.megger.com 3
www.megger.com
4
Introduction
1. Introduction
1.1 Product description
The Megger MCT105 Cable Tracer and Fault Locator kit consists of a transmitter, receiver and ancillary leads.
It is designed to trace and aid fault location in cables, circuits or metallic conductors, such as pipes.
The signal produced by the transmitter is a modulated current, generating an electro-magnetic field around
the conductor. This field induces a voltage within the receiving coil. The induced voltage is measured,
amplified, decoded and converted to the original signal by the receiver, with the result finally displayed on
the screen as a simple signal strength.
1.2 Features
Tracing cables and conductors in walls
Identify cable and conductor interruptions (open-circuits) or short-circuit faults
Cable and conductor tracing in the soil
Identify fuses and circuit breakers within distribution boards
Detecting interruptions and short-circuits in floor heating
Tracing metallic water and heating piping
Transmitter display indicates signal level, the transmission code, as well as any voltage detected on the
output terminals
Receiver display indicates the signal strength, the transmission code, as well as the presence of mains
voltage
Automatic and manual sensitivity adjustment
Variable tone audible signal level on the receiver (may be switched off)
Auto-Power-Off function
Backlight on both transmitter and receiver displays
Torch function when working under bad lighting conditions
1.3 Company web site
Occasionally an information bulletin may be issued via the Megger web site. This may concern new
accessories, new usage instructions or a software update. Please occasionally check on the Megger web site
for anything applicable to your Megger instruments.
www.megger.com
www.megger.com F5
Safety Warnings and Standards
2. Safety Warnings and Standards
2.1 Warnings, cautions and notes
This user guide follows the internationally recognised definition. These instructions must be adhered to at all
times.
Description
WARNING : Indicates a potentially dangerous situation which, if ignored, could lead to
death, serious injury or health problems.
CAUTION : Indicates a situation which could lead to damage of the equipment or
environment
NOTE : Indicates important instructions to be followed to perform the relevant process
safely and efficiently.
Icon Description
FWarning: High Voltage, risk of electric shock
This WARNING symbol indicates a potentially hazardous situation, which if not
avoided, could result in death or serious injury, or result in damage to the product.
GCaution: Refer to user guide.
The respective accident prevention regulations established by the associations for
electrical systems and equipment must be strictly met at all times.
UK conformity. This equipment complies with current UK legislation
cEU conformity. Equipment complies with current EU directives.
Comply with EMC.
Do not dispose of in the normal waste stream.
Battery symbol
CAT III
IEC Overvoltage Category
CAT III equipment is designed to protect against transients in equipment in fixed
equipment installations, such as distribution panels, feeders and short branch
circuits, and lighting systems in large buildings.
tDouble insulated
www.megger.com
t
6
Safety Warnings and Standards
2.2 Safety warnings
Prior to operation, check that the transmitter, receiver and any connection cables are in good
condition and not damaged. The meter must not be used if any damage is identified, Contact Megger
for repair.
The Cable Locator may only be used on systems complying with the nominal voltages indicated in the
technical data section.
Prior to use, ensure the instrument is functioning correctly, as described within this manual. Always
connect the transmitter line terminal first and then the neutral.
The “-” earth/neutral terminal of the transmitter must always be connected to the conductor under
test before the “+” line terminal.
If the RCD/RCBO protecting the circuit under test trips on connection of the transmitter, this indicates
that a fault current is already present within the circuit.
If the instrument is subjected to a high electro-magnetic field, this may impede the functionality of the
instrument.
User safety cannot be insured if the instrument:
Shows obvious signs of damage
Is not functioning correctly. The instrument should be removed from service and the fault
investigated
Has been stored for too long under unfavourable conditions
Has been subjected to excessive heat or mechanical stress during transport or storage
All relevant local statutory regulations must be adhered to when using this instrument
2.2.1 Installation category definitions:
CAT IV - Measurement category IV: Equipment connected between the origin of the low-voltage mains
supply and distribution panel.
CAT III -Measurement category III: Equipment connected between the distribution panel and electrical
outlets.
CAT II - Measurement category II: Equipment connected between the electrical outlets and user’s equipment.
Measurement equipment may be safely connected to circuits at the marked rating or lower. The connection
rating is that of the lowest rated component in the measurement circuit.
www.megger.com t7
Instrument Overview
3. Instrument Overview
3.1 Transmitter layout
5
6
2
3
4
1
Item Description Item Description
1 Terminal: "+" (line) 4 Sensitivity level / backlight
2 Terminal: "-" (earth/neutral) 5 Power button
3 LCD 6 Battery case
3.2 Transmitter display
1
5
34
2
Item Description Item Description
1 Transmitted code (1,2,3,4,5,6,7) 4 Low battery indication
2 External voltage detected 5 Transmitted level display (I, II or Ill)
3 External voltage level
(12 V, 50 V, 120 V, 230 V, 400 V)
www.megger.com
t
8
Instrument Overview
3.3 Transmitter: Fuse protection
The built-in fuses protect the instrument against overload or incorrect operation.
Fuse replacement can only be undertaken by Megger or an approved service center.
If the transmitter signal appears weak, check for fuse failure using the following method:
Disconnect the transmitter from all connected measurement circuits.
Switch on the transmitter.
Set transmission level I.
Connect a single lead to the red terminal of the transmitter..
Switch on the receiver. Search for the signal by placing the sensor head on the cable.
Insert the other end of the cable in the black transmitter terminal and check the received signal
increases accordingly. If the signal remains the same, one of the internal fuses will require
replacement.
3.4 Receiver layout
7
4
6
52
3
9
8
1
11
10
Item Description Item Description
1 Sensor head 7 Mode button
Select automatic or manual mode
2 Torch 8 Backlight / Beeper ON/OFF button
3 LCD display 9 Upward selection
Press to manually increase sensitivity
4 NCV button
(Non-contact voltage detection) to
select between cable locator mode
and mains voltage detection mode
10 Power ON/OFF button
5 Torch button 11 Battery compartment (on rear)
6 Downward selection
Press to manually reduce sensitivity
www.megger.com t9
Instrument Overview
3.5 Receiver display
3
6
11
4
5
9
8
12
2
7
10
1
Item Description Item Description
1 Acoustic signal (ON/OFF) 7 Manual mode sensitivity indicator:
1 arc - low sensitivity
8 arcs - high sensitivity
User selectable using up and down
arrow buttons
2 Torch ON/OFF indication 8 The manual mode active indicator
3 Transmitter signal code 9 Mains voltage indicator (NCV mode)
4 Automatic signal mode active indicator 10 Signal intensity digital display
5 Signal strength bar-graph 11 Transmitter signal level (1 to 3)
6 Battery level 12 Non-contact voltage mode active
www.megger.com
t
10
Operation
4. Operation
4.1 Cable locator mode
4.1.1 Automatic mode
Automatic mode is active when the transmitter is first turned on. “SIG” is shown on the display.
4.1.2 Manual mode
Press the mode button to select manual mode.
When the manual mode is selected the symbol “SENSE” is displayed.
4.1.3 AC Non-Contact Voltage (NCV) detection mode
Press the NCV button to switch between cable locator mode and non-contact voltage detection mode
Indice
