MFT1500 Series Combined Insulation, Loop & RCD Tester

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Combined 16th Edition testing Guaranteed non-tripping loop test range Backlit display and selector ranges Automatic RCD testing (MFT1552 only) Illuminated switch probe Selectable touch voltage Touch (fault) voltage and display Calibrated earth loop test lead Calibration certificate

DESCRIPTION

The MFT1500 series multifunction tester has been revised to include some additional new features: Called the MFT1500 series, they retain all the essential features necessary for testing domestic, commercial and industrial fixed wiring, and now include the following:

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FEATURES
The MFT1500 series uses the patented Megger digital/ analogue arc display. The analogue arc provides an indication of fluctuating readings, while the digital readout providing the ability to record accurate results. All test functions are selectable from the main panel, with no hidden ranges or functions to forget. Special functions include:
PFC measurement on both loop test ranges Selectable Fault (Touch) voltage 25 V or 50 V Fault (Touch) voltage display New Megger lead set included with all instruments DC test functions for RCDs

VOLTAGE MEASUREMENT

All instruments test in accordance with International Standards and National Wiring Regulations including BS7671 (16th Edition wiring regulations) and European Standard EN61557. In addition, the MFT1500 series also meets or exceeds the requirements of EN61010-1 Category III 480 V (max) phasephase. The MFT1500 is available in 3 options, the standard MFT1501/2 the MFT1502/2 which includes useful additional facilities such as backlit display and range switches, plus the unique Megger illuminated switched probe, and the MFT1552 which has an automatic RCD test feature. The unique modern styling of the instruments allows it to be operated whilst stood on the floor, a ledge, hung around the neck with the supplied neck strap, or held in the hand.
AC/DC Volt meter provides a means of measuring the supply voltage independently of any other test functions, eliminating the need to carry a separate multimeter. Automatic selection of AC or DC measurement up to 500 V a.c./d.c.

CONTINUITY TESTING

200 mA continuity from 0.01 to 99.9 k exceeds all current requirements for testing final ring circuit conductors, and bonding of services. Automatic continuity testing commences the moment the test probes touch the circuit to be tested, allowing fast testing with both hands free. Fast continuity buzzer is a fast buzzer tone, with no delay on each test for the buzzer to sound, saving valuable operator time. This test includes a fast safety check for the presence of a voltage as the test probes are connected to the circuit.
Variable buzzer threshold controls the limit at which the continuity buzzer stops sounding. Selected from 2 to 100 in 6 steps. Lead null stores the test lead resistance and deducts this value from the continuity result, even if the instrument is switched off. Thus reducing the chance of possible measurement errors.

RCD TESTING:

10 mA to 1000 mA RCD ranges. All standard RCDs from 10 mA to 1000 mA are fully supported. All standard RCD test functions are available with both 0 and 180 phase angle at 1/2I, I and 5I up to 300 mA. RCD ramp test measures the RCD trip current. The ramp test displays the actual trip current on all RCD ranges instead of trip time. Ideal for identifying nuisance tripping RCDs. The current is stepped up from 1/2I to I in 200 ms steps. Fault (Touch) voltage can now be set for either 25 V or 50 V depending on application. Fault/touch voltage can also be displayed up to 100 V on a selectable bargraph. DC sensitive, RCD test option enables testing at I and 5I.

Insulation testing:

Insulation test at 250 V, 500 V and 1000 V for testing low voltage applications. A 1000 V warning is issued prior to performing the 1000 V insulation test. Live circuit warning when performing insulation or continuity measurements a live circuit warning is displayed and an audible warning sounded if connected to a circuit with a voltage greater than 25 V (15 V for continuity testing). Safety lockout at voltages greater than 55 V during continuity and insulation testing, the instrument automatically warns the operator and inhibits any testing, preventing accidental damage to the instrument and full protection to the operator. The Auto discharge facility safely discharges all circuits after an insulation test, preventing accidental shock from a stored charge on a long cable during or after disconnection.

GENERAL FEATURES:

Quick to pick up and use by using colour coded ranges and no hidden functions the MFT1500 series takes minutes to learn how to use. Function buttons are colour matched to the test mode to ensure easy operation. Visible and audible Safety warning features are paramount with live circuit warning and protection circuitry. If live voltages exist on a circuit during insulation or continuity testing the voltage is displayed on the screen. If this voltage exceeds a safe level, the MFT1500 series inhibits further testing and a warning beeper sounds for extra safety. Large easy-to-read LCD using the patented Megger digital/analogue arc technology - combining high speed analogue clarity with digital stability. Making it easy to read even in low light level. Economical with batteries by incorporates an auto shut off facility that operates after 5 minutes of inactivity, reducing wasted battery consumption. Innovative test lead connection has been developed for the MFT1500 series. The unique shutter system allows only those combinations of test leads permitted for safe testing to be connected. Unsafe or unnecessary options cannot be connected. Rubber over-moulded case. The ergonomic rubber moulding provides a secure comfortable hold, whilst providing maximum protection with IP54 weather proof rating. Calibration certificate 3 year warranty

LOOP TESTING

Low current loop test is a 3 wire non-tripping 0.01 loop test designed to prevent RCD tripping by using a sophisticated 15 mA loop test pioneered by Megger Limited. This NO-TRIP test ensures the RCD will not trip whilst performing a loop impedance test. High current loop test at 25 A provides a fast loop test where no RCD is fitted, or for Ze measurement on the incoming side of an RCD. Supply voltage and polarity indication upon connection to the mains supply the polarity and voltage are displayed to show correct wiring of the socket under test or test lead connections. This function also provides a warning of live voltages while continuity or insulation testing. Phase-Phase Phase-Neutral and Phase-Earth Loop Tests are possible. No danger of damage from accidental 3phase connection. Wide supply voltage; allows loop measurements from 55 V to 480 V No damage if accidentally connected. across phases. Prospective short-circuit current (PSC) A dedicated PSC range, using either the 25 A high current loop test or no-trip test, is provided for rapid measurement of Loop currents, both at the socket outlet and distribution board. The PSC ranges from 1 A to 19.9 kA with a resolution of 1 A, 10 A and 100 A depending on range. All the loop and PSC tests are auto-ranging.

MFT1502/2 Additional features
Illuminated switched probe shines a new light on testing. A fully featured test probe allows for single-handed operation and test status indication. Probe features include:
Remote test button for single-handed testing in difficult locations, the test button duplicates the instrument test
button in all test modes.
LED torch using a built-in WHITE LED light provides illumination to the probe tip, providing essential lighting in low light conditions. Red/green status LED duplicates the warning display on the main instrument display. A RED LED indicates a voltage present on an insulation range. A GREEN LED indicates the instrument is displaying a valid test result. Three interchangeable probe tips are supplied in standard shrouded, removable shrouded and an extended probe tip to provides the ideal probe tip option. Illuminated display and selector ranges. Not only the backlight, but also the selector dials are illuminated to allow for use in difficult low-light conditions. Range or function change automatically operates the backlight, or by manual selection. Instrument and document carry case is supplied to transport the instrument as well as any necessary test leads, documents, drawings etc.
Continuity (to EN 61557-4) Ohms: 0.01 - 99.9 (2% 2 digits) 100 - 99.9 k (5% 2 digits) Buzzer Selectable limits of 2 , 5 , 10 , 20 , 50 , 100 Open circuit voltage 4-5 V d.c. Test current: >200 mA @ 2 Test Lead null: Up to 9.99 (zero uses Test Button) Loop test ranges (to EN 61557-3) Line/Earth(Single phase) 25 A 0.01 - 9.99 (5% 0.03 ) 10.0 -89.9 (5% 0.5 ) 90 - 899 (5% 5 ) 900 - 3.00 k (5% 20 ) Supply: 55 V - 280 V 45 Hz Phase to phase 25 A 0.01 -1 9.99 (5% 0.03 ) Supply: 55 V - 480 V 45Hz to 65Hz Low current Loop (NO TRIP) 15 mA 0.01 - 2.00 k (5% 0.03 ohms Noise Margin). Supply: 55 V - 270 V 45Hz to 65Hz Prospective Shortcircuit Current PSC Prospective fault current = Nominal Voltage/Loop Resistance Accuracy is therefore derived from the loop test. 1 A - 199 A 0.02 kA - 1.99 kA 2.0 kA - 19.9 kA 1 A resolution 10 A resolution 100 A resolution to 65 Hz
MFT1552 Additional features
Selecting the auto (RCD) feature, starts the RCD test current cycle of 1/2I, I and 5I. Each time the RCD is tripped, resetting it, automatically continues the test sequence. Once completed, test results can be recalled on the MFT1552.

SPECIFICATION

Supply Voltage range Voltage a.c.: 0 V - 500 V 50/60Hz 2% 2 digits Voltage d.c.: 0 V - 500 V 2% 2 digits Polarity indicated above 10 V Insulation test ranges (to EN 61557-2) Short circuit current: <2 mA 250 V 0.01 M - 99.9 M 500 V 0.01 M - 299 M 1000 V 0.01 M - 499 M 2% 2 digits up to 99 M 250, 500 and 1 kV into 1 mA (BS7671, HD384 and IEC364) Output voltage: +20% - 0% at rated load or less Live circuit warnings Insulation: 25 V threshold Continuity: >15 V threshold Insulation 25 V visual warning 55 V visual, audible and test inhibit Phase to earth: >280 V visual, audible and test inhibit

RCD ranges (to EN-61557-6) Supply: 100 V - 270 V 45Hz to 65Hz Ranges: 1000 mA, 500 mA, 300 mA, 100 mA, 30 mA, 10 mA Type: 1/2I - 1/2 times the selected RCD rated current. I - One times selected RCD rated current. 5I - Five times I RCD rated current. RAMP - A ramp test that displays actual trip current. DC sensitive - A DC test current at 1/2I, I and 5I.
Current accuracy: No trip (1/2I) -8% to -2% Trip (I) and 5I +2% to +8% EMC In accordance with IEC 61326 including amendment No. 1 Environmental Operating range: -5 to +40C Operating humidity: 90% RH at 40C max Storage temperature: -25 to 65C Power supply 8 x 1.5 V Alkaline cells type LR6 Fuses Replaceable 500 mA (F) HBC 10 kA 500 V Non-replaceable 7 A (SIBA 70-065-63) x 2 Non-replaceable 1 A Remote probe: MFT1502/2 and MFT1552 only Torch feature: 5mm WHITE LED 1500 mcd Safety: CLASS 1 LED to IEC 60825:2001 Interchangeable tips Battery: 1 x 9 V Alkaline cell type PP3 Fuse: Non-replaceable 7 A (SIBA 70-065-63) Safety Double insulated to IEC61010-1-2001, Installation Category III, 300 V phase to earth, 500 V phase to phase. In addition Probe designed to meet IEC 61010-031-2002, Double insulated to Installation Category III, 300 V phase to earth, 500 V phase to phase. Physical Dimensions: 150 mm high x 85 mm wide x 235 mm deep (6 in. x 3.5 in. x 9.5 in.) Weight: 1440 gms (3lb) EN61557: Complies with the following parts of 61557, electrical safety in low voltage systems up to 1000 V a.c. and 1500 V d.c.Equipment for testing, measuring or monitoring of protective measures:Part 1- General requirements Part 2- Insulation resistance Part 3- Loop resistance Part 4- Continuity Part 6- Residual current devices (RCD) Part 10- Combined measuring equipment Maximum altitude: 2000 m Dust and water protection: Instrument IP54, probe no rating
Trip time accuracy: 1% 1 ms T o u c h ( F a u l t ) v o l t a g e : 0 V to 100 V error 5% to +15% 0.5 V S e l e c t i o n : 25 V or 50 V
ORDERING INFORMATION Order No. Item (Qty) Multifunction tester standard MFT1501/2 Multifunction tester with illuminated switch probe MFT1502/2 Multifunction tester standard (European) MTF1501/2E Multifunction tester with illuminated switch MFT1502/2E probe (European) Multifunction tester with automatic RCD testing Accessories included with MFT1501 User guide on CD 3 wire test lead Crocodile clips (red, black and green) Mains plug (BS1363) test lead Additional accessories with MFT1502 As MFT1501/2 plus: Illuminated switched probe
UK Archcliffe Road Dover CT17 9EN England T +44 (0) F +44 (0) UNITED STATES 4271 Bronze Way Dallas TX 75237-1019 USA T 2861 (USA only) T +F +331 7399

MFT1552 6172-831

Item (Qty) Instrument/document carry case Optional accessories for MFT1500 Series Replacement 3 wire test lead set Fused prod and clip set Standard switched probe Illuminated switched probe Test lead with Schuko plug Test lead with UK mains plug Test lead with USA mains plug Earth bond test lead set Instrument/document carry case Illuminated probe tip set Euro earth bond test lead (Schuko)

Order No.

6220-796 6180-405 6220-606 6311-089 6231-593 6220-740 6220-643 6231-586 6420-143 6121-562 TBA
OTHER TECHNICAL SALES OFFICES Norristown USA, Toronto CANADA, Mumbai INDIA, Trappes FRANCE, Sydney AUSTRALIA, Madrid SPAIN and the Kingdom of BAHRAIN.
Registered to ISO 9001:2000 Cert. Q 09290 Registered to ISO 14001:1996 Cert. EMS 61597
MFT1500_SERIES_DS_en_V05 www.megger.com Megger is a registered trademark

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:

F G t c

Caution: risk of electric shock Caution: refer to accompanying notes Equipment protected throughout by Double Insulation (Class II) Equipment complies with current EU directives. Equipment must not be connected to installations >500 V.

>500V

BLUE (RCD)

ORANGE (BUZZER)

BLACK (BACKLIGHT)

YELLOW (TEST)

RED (LOCK)
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

OPTION 2

Switched probe BLACK

RED PROBE
Voltage measurement (V) Range switch set to (V) range
The MFT1500 will automatically display circuit voltage up to 500 V a.c./d.c.
Continuity Measurement [] Range switch set to [] range

Test Lead options 1 or 2 The MFT1500 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 ) Buzzer Threshold (Z) Select BUZZER range and press the ORANGE button until required range is displayed. Options, 2 , 5 , 10 , 20 , 50 , and 100 Warning: Ensure the circuit to be tested is disconnected and isolated before starting testing.

Insulation testing [M]

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] OPTION 1
3 wire measurement BLACK GREEN RED PROBE
Switched Probe BLACK GREEN

OPTION 3

Mains plug test lead
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 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.

OPTION 1

2 wire lead set

Switched probe GREEN

GREEN RED PROBE
Warning: The LCD 'Neons' are invalid when using the two wire connection and should be ignored.
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 OPTION 1

2 wire measurement
Switched probe GREEN GREEN RED PROBE
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, I or 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 1/2I the message >1999 ms is displayed after 2 seconds. NOTE: The message TrP will be displayed if the RCD trips unexpectedly. On I the 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.DC test [DC] 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 = 1/2I test, one bar = I test, 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, I or 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 (0/180). 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
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. Once selected perform the RCD tests in the same way as normal RCDs (see RCD testing above). To disable Selective RCD mode, press the degree button for two seconds.

0 or 180

On either the I, 5I or DC test, to switch between 0 and 180 press the BLUE 0/180 button.

Ramp Test [

Test Lead OPTION 1, 2 or 3 as required A test current from 1/2I to 1I will be applied during which the RCD should trip. 1) 2) 3) 4) 5) Set the range select to the RAMP symbol. Set the RCD range switch [mA] to the current rating of the RCD. Press the YELLOW test button. Results are displayed in mA. 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 battereis must not be used. Low battery voltage is indicated by the b symbol in the display. If there are no display images replace the batteries.
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 symbol. 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
Megger Limited Archcliffe Road Dover Kent, CT17 9EN England Megger T + 44 (0) F + 44 (0) E uksales@megger.com
4271 Bronze Way Dallas TX 75237-1019 U.S.A.
T +1 (800) 723-2861 (U.S.A. only) T +1 (214) 333-3201 (International) F +1 (214) 331-7399 E ussales@megger.com
Megger Z.A. Du Buisson de la Couldre 23 rue Eugne Henaff 78190 TRAPPES France T +33 (0) 1 30.16.08.90 F +33 (0) 1 34.61.23.77 E infos@megger.com
Megger Pty Limited Unit Hudson Avenue Castle Hill Sydney NSW 2125 Australia T +61 (0)2005 F +61 (0)2201 E ausales@megger.com

Megger Limited 110 Milner Avenue Unit 1 Scarborough Ontario M1S 3R2 Canada
T +(Canada only) T +F +E casales@megger.com
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 3 - Printed in England - 0107 www.megger.com