Megger MFT1700 series Bedienungsanleitung

MFT1700/1800 Series

Multifunction Tester

Quick Start Guide

GSAFETY WARNINGS

n Safety warnings and precautions must be read and understood before

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

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

before test connections are made when carrying out insulation and

continuity tests.

n 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, RCD or earth testing

n Do not touch circuit connections and exposed metalwork of an

installation or equipment under test. Under fault conditions the system

earth could become hazardous live.

n Do not touch the earth stakes, test leads and their terminations

(including connections to the earthing system under test) if an

installation earth fault can arise unless adequate precautions are taken.

n The ‘live circuit warning’ and ‘Automatic discharge’ functions are

additional safety features and should not be regarded as a substitute

for normal safe working practices.

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

n Do not operate the instrument or connect it to any external system

if it shows any visible signs of damage or if it has been stored for

prolonged periods in unfavourable conditions.

n Do not operate the instrument or connect it to any external system

if the battery compartment or casing is open or any parts of the case

(including keypad, selector switch, display window, etc.) are missing.

n Always disconnect the instrument from all systems while batteries are

being changed or the fuse replaced

n Do not replace the rechargeable cells in the MFT1730 and 1835 with

non-rechargeable “dry” cells and attempt to charge the cells. This can

cause explosion or fire.

n Do not operate the charging equipment supplied with the MFT1730 or

MFT1835 in damp or wet environments or outside. All test leads must

be removed from the instrument while charging.

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

before disconnecting test leads. Locking the Insulation test ON should

only be used where there is no risk of a circuit holding a charge.

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

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

with no broken or cracked insulation.

n All test leads supplied with the instrument form part of the measuring

circuit of the instrument. They must not be modified or changed in any

way, or be used with any other electrical instrument or appliance.

n A plug severed from the power cord MUST be destroyed, as a plug with

bare conductors is hazardous in a live socket outlet.

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

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

measuring voltage on high energy systems.

n Replacement fuses must be of the correct type and rating.

n Failure to fit the correctly rated fuse will result in damage to the

instrument in the event of an overload.

n Special precautions are necessary when operating in situations where

“live” earths may be encountered: isolation switches and fuses (not

supplied with this instrument) must be used.

n Special precautions are necessary when working near high tension

systems (MV and HV): rubber gloves and shoes (not supplied with this

instrument) should be worn.

n Special precautions are necessary when working in wet conditions or

in agricultural areas: observe the local safety standards and take all

necessary special precautions applicable to the particular location and

do not touch the test leads with bare hands.

LIVE EARTH SAFETY PRECAUTIONS

n A ‘Live’ earth is one that carries current from the mains supply, or could

do so under fault conditions. The following warnings apply in addition

to those listed previously.

n All persons involved must be trained and competent in isolation and

safety procedures for the system to be worked on. They must be clearly

instructed not to touch the earth electrode, test stakes, test leads, or their

terminations if any ‘Live’ earths may be encountered. It is recommended

that they wear appropriate rubber gloves, rubber soled shoes, and stand

on a rubber mat.

n The earth electrode under test should be isolated from the circuit it

is protecting before testing commences. If this is not possible, ART

(attached Rod Technique) may be used to measure electrode resistance.

n The instrument terminals should be connected to the system under test

through isolation switches that are rated to handle the likely maximum

fault voltages and currents that could be encountered at the installation.

The isolation switch must be open whilst any personal contact is made

with the remote test stakes, or the connecting leads, e.g. when changing

their position.

n The instrument terminals should be connected to the system under test

through fuses that are rated to handle the likely maximum fault voltages

and currents that could be encountered at the installation.

All manuals and user guides at all-guides.com

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 not GS38 ‘Electrical Test Equipment

for use by Electricians ‘ should be used .

This instrument is internally protected against electrical damage when used

for the purposes of testing low voltage electrical installations as defined

herein. If used in a manor other than those defined in this user guide the

protection capabilities could be impaired with potential risk to the operator

and the instrument.

Symbols used on the instrument are:

G Caution: refer to accompanying notes

Maximum nominal system voltage of 600 V

c Equipment complies with current EU directives

Equipment complies with ‘C tick’ requirements

Maximum 300 V a.c. CAT IV to earth

Instrument protected by 2 x F2A 600 V 50 kA fuses

This equipment should be recycled as electronic waste

12 Vdc charger socket

Instrument overview

Display layout



Test button (left)

lead null set

Function

button

Test lock

Result save

Bluetooth® transfer

Display

backlight

Secondary

functions

Primary

functions

Test button (right)

Lead null set

UP selector

Test lock

Down selector



Touch

voltage

limit

Analogue arc

Function

indicators

Battery status

NiMH or Alkaline

Secondary display

Primary results

display + Phase

Rotation

All manuals and user guides at all-guides.com

Terminal panel

Voltage/Frequency/Phase Rotation [V, Hz, ROT]

MEASUREMENT: Automatic. Large display shows Volts AC, small

display shows frequency

Phase rotation: L1 : L2 : L3 = Normal L1 : L3 : L2 = Reversed

Warnings: Maximum voltage range 600 Vac

SETUP options: NONE

Continuity measurement [Ω] - Measures

resistance of conductors

MEASUREMENT: Automatic on connection. Large display shows

resistance, small display shows test current.

Lead Null: To null leads, connect test leads together and press

TEST. Null indicator appears. To remove, Open

circuit leads and press TEST.



Main

range

knob

(left)

2nd

range

knob

Terminal

connections

Separate

leads

Mains lead

connections

User

action

Volts/Hz

Not used None

ROT

Not used Not suitable Press



L-E

Main

range

knob

(left)

2nd

range

knob

Terminal

connections

Separate

leads

Mains lead

connections

User

action

Not used

Auto-

matic

contact



L-N

L-E



All manuals and user guides at all-guides.com



Functions:



Buzzer ON/OFF

Buzzer threshold: Buzzer sounds below 2 Ω. To change limit go to

SETUP

Warnings: Live circuit test inhibit at 3 V

SETUP options:

Test current: 200 mA / 15 mA

Auto reverse testing: On/Off

Continuity buzzer threshold: 0.5 Ω, 1 Ω, 2 Ω, 5 Ω, 10 Ω, 20 Ω, 50 Ω and

100 Ω

Insulation measurement [MΩ]

MEASUREMENT: Press TEST to start. Keep pressed until measurement

stabilises.

Release TEST button to discharge circuit.

Test Lock: Hold down TEST button and press LOCK. To release

press TEST.

Functions:



Insulation “Pass threshold” buzzer ON/OFF

Buzzer threshold: Sounds above 0.5 MΩ, adjustable in SETUP.

Warnings: Ensure circuit to be tested is disconnected and

isolated.

Live circuit warning at 25 V or 50 V (Default 50 V)

SETUP options: Insulation buzzer threshold: 0.5 MΩ, 1 MΩ, 2 MΩ,

3 MΩ, 4 MΩ, 5 MΩ, 7 MΩ, 10 MΩ, 50 MΩ, 100 MΩ,

500 MΩ (Default 0.5 MΩ)

RCD testing [ms] – Measures trip times of RCD

Main

range

knob

(left)

2nd

range

knob

Terminal

connections

Separate

leads

Mains lead

connections

User

action

250 V – 500 V

MFT1710

Not used

Press

and

hold

TEST

button



L-N

L-E

Main

range

knob

(left)

2nd range

knob

Terminal

connections

Separate

leads

Mains lead

connections

User

action

30 mA – 500 mA

MFT1710

See note See note See note

Press

TEST

button



All manuals and user guides at all-guides.com

Note: Third lead can be connected. The third lead will enable reverse

polarity detection.

MEASUREMENT: Press and release TEST button.

Supply: L-E = 90 Vac - 280 Vac L1(in) -L2(out) = 90 Vac –

480 Vac (Phase - Phase)

Functions:



0º and 180º (Quick press), Type AC, A, S, B

selection (Press and hold)

RCD



1700 series run 1/2xI, 1xI(0º), 1xI(180º), 5xI(0º),

5xI(180º) automatically.

1800 series run 1/2xI, 1xI(0º), 1xI(180º), 2xI(0º),

2xI(180º) & 5xI(0º), 5xI(180º)

RCD



Adjustable RCD trip current. Use



and



adjust current.

Warnings: Touch voltage >50 V

SETUP options: Touch voltage 25 V, 50 V (Default 50 V)

RCD ramp testing [mA] – Measures trip current of RCD

Note: Third lead can be connected. The third lead will enable polarity

detection.

MEASUREMENT: Press and release TEST button.

Functions:



Fast Ramp - Pass/Fail test between 50% and

100% of range

Slow Ramp – Displays trip current in mA

Warnings: Touch voltage >50 V

Reverse polarity

SETUP options: Touch voltage 25 V, 50 V (Default 50 V)

Main

range

knob

2nd Range

knob

Terminal

connections

Separate

leads

Mains lead

connections

User

Action

Press

TEST

button



All manuals and user guides at all-guides.com

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Loop impedance testing [mA] – Measures circuit loop

impedance

Note: Third lead can be connected. The third lead will enable reverse

polarity detection

MEASUREMENT: Press TEST to start. L-E tests start automatically.

Supply: L-E = 50 Vac - 280 Vac

L-L, L-N = 50 Vac – 480 Vac

Zmax:



Stores maximum loop measurements on small

display and most recent loop measurement on

larger display

Warnings: Over voltage

Reverse polarity (with mains plug test lead)

SETUP options: Auto start on connection ON/OFF

Note: Third lead can be connected. The third lead will enable polarity

detection.

Loop impedance R1+R2 testing [mA]

MEASUREMENT: Select Zref and make measurement at Ze (or Zdb).

This is automatically saved.

Zref & R1+R2 Select R1+R2 mode and make measurement as

normal (Zs).

Zref automatically deducted from Loop (Zs) value

to give R1+R2 value.

Main

range

knob

(left)

2nd Range

knob

(right)

Terminal

connections

Separate

leads

Mains lead

connections

User

Action

NOT 1710

See note See note See note

NONE



Main

range

knob

(left)

2nd Range

knob

(right

Terminal

connections

Separate

leads

Mains lead

connections

User

Action

then

See note See note See note

NONE



All manuals and user guides at all-guides.com

Loop impedance R1+R2 testing [mA]

MEASUREMENT: Press TEST to start.

Warnings: Over voltage

SETUP options: None

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 2001-711- Edition V01 - Printed in England - 0211

www.megger.

Main

range

knob

2nd Range

knob

Terminal

connections

Separate leads User

Action

Not used Press and

release

TEST button



All manuals and user guides at all-guides.com

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