Megger MFT1552, MFT1500-2 User Manual

M

MFT1500/2 and
MFT1552 Series

Multifunction Tester

Quick Start Guide

■ Safety Warnings and Precautions must be read and understood before

GSAFETY WARNINGS

the instrument is used. They

■ 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
earth fault loop impedance test, or RCD test.

■ Circuit connections and exposed metalwork of an installation or

equipment under test

■ The live circuit warning and Automatic discharge are additional safety

features and
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
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.

should not be regarded as a substitute for normal safe

cannot be relied upon to identify circuit correctness and are for

must be observed during use.

must be verified before carrying out an

must not be touched.

HE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED

T

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

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

a

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

e
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:

A

NOTE

ND COMPETENT PERSONS

F Caution: risk of electric shock
G Caution: refer to accompanying notes

t Equipment protected throughout by Double Insulation (Class II)
c Equipment complies with current EU directives.

Equipment must not be connected to installations >500 V.

>500V

G

BLUE (RCD) ORANGE (BUZZER)

BLACK (BACKLIGHT) YELLOW (TEST)

Backlight (MFT1502/MFT1552 only)

Intelligent mode - operates automatically. To switch to manual
mode, press the RED lock and the BLACK backlight buttons
together.

Voltage, Continuity and Insulation testing

OPTION 1

2 wire lead

set

BLACK

RED

OPTION 2

Switched

probe

BLACK

PROBE

Voltage measurement (V)
Range switch set to (V) range

The MFT will automatically display circuit voltage up to 500 V
a.c./d.c.

RED
(LOCK)

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.