Megger MFT1500/2 Manuel utilisateur

MFT1500/2 and

MFT1552 Series

Multifunction Tester

Quick Start Guide

GSAFETY WARNINGS

■Safety Warnings and Precautions must be read and understood before

the instrument is used. They must be observed during use.

■The circuit under test must be switched off, de-energised and

isolated before test connections are made when carrying out insulation

and continuity tests.

■Continuity of protective conductors and earthed equipotential bonding of

new or modified installations must be verified before carrying out an

earth fault loop impedance test, or RCD test.

■Circuit connections and exposed metalwork of an installation or

equipment under test must not be touched.

■The live circuit warning and Automatic discharge are additional safety

features and should not be regarded as a substitute for normal safe

working practices.

■Do not move the rotary switch positions while a test is in progress.

■The LCD ‘neon’ voltage indicators cannot reveal a Neutral - Earth reversal.

They cannot be relied upon to identify circuit correctness and are for

guidance only.

■After insulation tests, capacitive circuits must be allowed to discharge

before disconnecting test leads.

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

■Test leads, probes and crocodile clips must be in good order, clean and

with no broken or cracked insulation.

■Ensure that hands remain behind guards of probes/clips when testing.

■U.K. Safety Authorities recommend the use of fused test leads when

measuring voltage on high energy systems.

■Replacement fuses must be of the correct type and rating. Failure to fit

the correctly rated fuse will result in damage to the instrument in the

event of an overload.

NOTE

THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED

AND COMPETENT PERSONS

Users of this equipment and/or their employers are reminded that Health

and Safety Legislation requires them to carry out valid risk assessments of all

electrical work so as to identify potential sources of electrical danger and risk

of electrical injury such as inadvertent short circuits.

Where the assessments show that the risk is significant then the use of fused

test leads constructed in accordance with the HSE guidance note GS38

'Electrical Test Equipment for use by Electricians' should be used.

Symbols used on the instrument are:

FCaution: risk of electric shock

GCaution: refer to accompanying notes

tEquipment protected throughout by Double Insulation (Class II)

cEquipment complies with current EU directives.

Equipment must not be connected to installations >500 V.

Voltage, Continuity and Insulation testing

Voltage measurement (V)

Range switch set to (V) range

The MFT will automatically display circuit voltage up to 500 V

a.c./d.c.

Backlight (MFT1502/MFT1552 only)

Intelligent mode - operates automatically. To switch to manual

mode, press the RED lock and the BLACK backlight buttons

together.

OPTION 2

Switched

probe

OPTION 1

2 wire lead

set

BLACK

BLACK (BACKLIGHT) YELLOW (TEST)

RED

(LOCK)

BLUE (RCD) ORANGE (BUZZER)

BLACK

RED

PROBE

G>500V

Continuity Measurement [Ω]

Range switch set to [Ω] range

Test Lead options 1 or 2

The MFT will automatically display continuity resistance when

connected.

Lead Null

Short test leads together and press the YELLOW test button on the

instrument or Switched Probe.

Continuity Buzzer (Z)

The buzzer will sound automatically when a circuit is made (default

threshold <2 Ω)

Buzzer Threshold (Z)

Select BUZZER range and press the ORANGE button until required

range is displayed.

Options, 2 Ω, 5 Ω, 10 Ω, 20 Ω, 50 Ω, and 100 Ω

Warning: Ensure the circuit to be tested is disconnected and

isolated before starting testing.

Insulation testing [MΩ]

Range switch set to [250 V, 500 V or 1 kV] range

Test Lead Options 1 or 2

For insulation voltage range select 250 V, 500 V or 1 kV as required.

Press the YELLOW test button on the instrument or on the

switched probe to activate the test.

Insulation Test lock

Press the YELLOW test and RED lock buttons together to lock on

the insulation test mode.

The warning triangle is displayed during test lock.

To disable test lock press the YELLOW test button again.

Warning:

Hazardous voltages may be continuously present on the test

probes when the test button is locked down.

Non tripping loop test [NO TRIP]

Range switch set to the [NO TRIP]

Test Lead Options 1, 2 or 3

NOTE: A 3-Wire connection must be used.

Select when loop testing circuits with RCD protection fitted.

1) Firmly connect the GREEN lead to EARTH, the BLACK lead to

NEUTRAL and the RED lead to PHASE. (Alternatively insert

the plug into an installation socket) (OPTION 3).

2) Supply voltage and polarity are displayed.

3) The test will ‘beep’ and automatically start when a voltage is

detected.

4) Measured L-PE loop value is displayed.

The measured value may differ to the anticipated value. This is

caused by noise on the supply ( ).

Repeating the test may result in a different reading if this is the

case refer to page 13 of the handbook for possible solutions.

The test can be repeated by pressing the YELLOW test button.

Warning: Live voltages present on test circuits during tests.

High current loop test [Hi]

For use on circuits with NO RCD protection fitted.

Warning: The LCD 'Neons' are invalid when using the two wire

connection and should be ignored.

OPTION 3

Mains plug

test lead

OPTION 2

Switched

Probe

OPTION 1

2 wire lead

set

OPTION 3

Mains plug

test lead

OPTION 2

Switched

probe

OPTION 1

3wire

measurement

BLACK

GREEN

BLACK

GREEN

RED

PROBE

RED

GREEN

PROBE

Range switch set to [Hi] range

Test Lead set: Options 1, 2 or 3

Phase-Earth loop impedance

1) Connect the GREEN lead to EARTH and the RED lead to

PHASE or plug into 13 Amp socket.

2) Supply voltage will be displayed.

3) The test will beep and automatically start when voltage is

detected.

4) Measured loop value is displayed.

5) To repeat, press the YELLOW test button.

Phase-Neutral loop impedance

Same connections to instrument as above but connect GREEN lead

to NEUTRAL and RED lead to PHASE.

Phase-Phase loop impedance

Same connections to instrument as above but connect the GREEN

lead to 2nd PHASE and the RED lead to 1st PHASE.

Bonded Metalwork Testing [Hi]

Test Lead set: OPTION 1 or 2

1) Connect the GREEN lead to the bonded metalwork.

2) Connect the RED lead to PHASE.

3) Supply voltage is displayed.

4) The test will ‘beep’ and automatically start when voltage is

detected.

5) Measured resistance value is displayed.

PFC Measurement [PFC Hi]

NOTE: High current 25 A measurement.

Range switch set to [PFC Hi]

Using test lead OPTION 1, 2 or 3, connect the test leads as

follows:

Phase-Earth PFC

GREEN lead to EARTH and the RED lead to PHASE.

Phase-Neutral PFC

GREEN lead to NEUTRAL and RED lead to PHASE.

Phase-Phase PFC

GREEN lead to 2nd PHASE and the RED lead to 1st PHASE.

1) The supply voltage is displayed and the test will beep, and

automatically start when voltage is detected.

2) Measured PFC result is displayed.

No Trip PFC Measurement (NO TRIP PFC)

Range switch set to [NO TRIP PFC]

Using non tripping loop test lead options 1, 2 or 3 -

connect the leads as shown.

Phase to earth PFC

1) The supply voltage is displayed and the test will beep, and

automatically start when sufficient voltage is detected.

2) The measured PFC result is displayed.

RCD testing

1/2I, I and 5I RCD trip timing [RCD]

Warning: The LCD 'Neons' are invalid when using the two wire

connection and should be ignored.

Test Lead OPTION 1,2 or 3

Select 1/2I, Ior 5I as required.

1) Ensure the right hand RCD range switch [mA] is set to the

correct range for the RCD under test.

2) Connect the test leads to the RCD as shown above.

3) Press the YELLOW test button on the instrument or the

switch probe.

On 1/2Ithe message >1999 ms is displayed after 2 seconds.

NOTE: The message ‘TrP’ will be displayed if the RCD trips

unexpectedly.

On Ithe trip time is displayed (or >400 ms if RCD fails to trip).

On 5I the trip time is displayed (or >40 ms if RCD fails to trip).

RCD auto test sequence (MFT1552)

To start the RCD auto test

1) Connect the RED test lead to the “Live” temminal of the RCD

and GREEN and BLACK test leads to the earth conductor.

Alternatively connect the mains plug test lead to a supply outlet.

2. Select the AUTO RCD TEST on the main range knob and the

RCD current rating on the small range knob.

OPTION 1

2 wire

measurement

OPTION 3

Mains plug

test lead

OPTION 2

Switched

probe

GREEN

RED

PROBE

3. Press the TEST button. Reset the RCD each time it trips.

4. To recall test results repeatedly press the LOCK button. To

indicate each test result, segments of the bar graph are displayed

as below:

no bars = 1/2Itest, one bar = Itest, five bars = 5I test

DC test [DC]

Test Lead OPTION 1,2 or 3 as required

1) Select the appropriate RCD rated current on the rotary switch.

2) Select 1/2I, Ior 5I on the left hand rotary switch.

3) Use the BLUE button to cycle through the test options, selecting

DC and the polarity of the test (0º/180º).

4) Press the YELLOW test button.

5) The trip time will be displayed.

5) If the RCD fails to trip, ">*** ms" will be displayed.

*** = Trip test duration.

Time Delayed (Selective) RCDs [I and DC only]

The selective RCD test is enabled by a long press on the blue degree

button. As selective RCD test mode is enabled the MFT will emit a

long beep and the display will show the exclamation mark (!)

symbol.

To disable Selective RCD mode, press the degree button for two

seconds.

0º or 180º

On either the I, 5Ior DC test, to switch between 0º and 180º

press the BLUE 0°/180° button.

Ramp Test [ ]

Test Lead OPTION 1, 2 or 3 as required

A test current from 1/2Ito Iwill be applied during which the

RCD should trip.

1) Set the range select to the RAMP symbol.

2) Set the RCD range switch [mA] to the current rating of the RCD.

3) Press the YELLOW test button.

4) Results are displayed in mA.

5) If RCD fails to trip the message ">***mA" is displayed.

*** = Final test current applied

Batteries

Uses 8 x 1.5 V AA (LR6) alkaline dry cells. Rechargeable batteries

must not be used.

Low battery voltage is indicated by the bsymbol in the display.

If there are no display images replace the batteries.

Megger Limited

Archcliffe Road

Dover T + 44 (0) 1304 502100

Kent, CT17 9EN F + 44 (0) 1304 207342

England E [email protected]

Megger

4271 Bronze Way T +1 (800) 723-2861 (U.S.A. only)

Dallas T +1 (214) 333-3201 (International)

TX 75237-1019 F +1 (214) 331-7399

U.S.A. E [email protected]

Megger

Z.A. Du Buisson de la Couldre

23 rue Eugène Henaff T +33 (0) 1 30.16.08.90

78190 TRAPPES F +33 (0) 1 34.61.23.77

France E [email protected]

Megger Pty Limited

Unit 26 9 Hudson Avenue

Castle Hill T +61 (0)2 9659 2005

Sydney NSW 2125 F +61 (0)2 9659 2201

Australia E [email protected]

Megger Limited T +1 416 298 9688 (Canada only)

110 Milner Avenue Unit 1 T +1 416 298 6770

Scarborough Ontario M1S 3R2 F +1 416 298 0848

Canada E [email protected]

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 6172-913- Edition 2 - Printed in England - 0206

www.megger.com

To replace batteries, disconnect test leads. Remove the battery

cover and carefully remove the battery carrier.

Replace with new batteries. Do not mix old and new batteries

Warning: OBSERVE CORRECT POLARITY. Incorrect battery

polarity could damage the instrument and invalidate the warranty.

Spare fuse

A blown fuse is indicated by the fsymbol. To replace the fuse:

Disconnect test lead and remove the battery cover, replace fuse

with spare provided: type: 500 mA (F) HBC 10 kA 500 V

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