Megger MFT1711 User manual

DESCRIPTION
The MFT1701 series is a range of 4 instruments for testing low voltage
electrical installations to BS7671. They provide all the tests required
to complete the necessary electrical certification for industrial,
commercial and domestic fixed wiring installations, including:
TRMS System voltage and frequency measurement
Insulation test at 100 V*, 250 V, 500 V and 1000 V
Including input protection against live circuits up to
600 V even when insulation test is locked-on
Continuity resistance at 200 mA or 15 mA
Automatic start - no need to press TEST so leaving
both hands free to hold probes
Resistance range up to 100 kΩ with fast continuity
buzzer at selectable thresholds
Earth loop test
2 and 3 wire non-trip range
2 wire Hi current including phase to phase
Prospective fault current measurement up to 20 kA
RCD testing including:
• Type AC, A, S, B* and programmable RCDs
• 3-phase RCDs*
• Auto-test routine
• Fault (Touch) voltage display
Earth spike testing
• 2-pole/3-pole**
• ART**
• Stakeless techniques **
* Model dependent
** Optional accessories required
The MFT1701 series has now been augmented with the addition of
the MFT1741 model. This model include:
Confidence meter – An adaptive loop test and display
method for electrically noisy circuits
Enhanced loop testing hardware – To remove the
effects of RCD on loop impedance values
The new “Confidence Meter” technology is ideal for enhanced Earth
Loop Impedance testing in electrically noisy environments. Traditional
Loop Impedance methods are susceptible to circuit noise during
the measurement phase. If the AC waveform changes during this
period, from noise or harmonics, the distortion can create significant
variation from test to test.
The new “Confidence Meter” analyses and adjusts for these
variations and provides a far more stable result every time, removing
the need for repeated tests.
In addition, the new MFT1741 also supports a new hardware
measurement technique, removing the influence of any RCD or
RCBO on the measured loop impedance value.
All instruments are IEC 61010 CAT IV 300 V rated for connection to
low voltage systems with no protective device, so safe for connection
anywhere on the system right up to the source transformer without
risk of damage from large transient spikes.
The unique modern styling allows it to be operated while stood
on the floor, a ladder-shelf or platform, hung around the neck or
handheld. Dual TEST and LOCK buttons - one pair at each end -
makes the testers easy to operate left or right handed.
MFT1711, MFT1721, MFT1731 and MFT1741
Multifunction Tester
MFT1711, MFT1721, MFT1731 and MFT1741
Multifunction Tester
Two and three wire non-trip loop testing
for RCD protected circuits
Type-B RCD and 3-phase RCD testing for
industrial applications with no Earth
3-terminal earth test and stakeless testing
for electrode resistance measurement
Internal memory and Bluetooth®
communications
EN61010 CAT IV safety rating and tough
IP54 case
Megger Loop impedance
“Confidence meter”
RCD coil impedance immunity

2
MFT1711, MFT1721, MFT1731 and MFT1741
Multifunction Tester
Quick to pick up and use, the controls are colour coded to make
range selection easy and fast. They also reduce the chance of using
the wrong function or range. The large crystal clear backlit display
uses the patented Megger digital/analogue arc, providing indication
of fluctuating readings while the dual digital readout shows precise
values of key measurements simultaneously with the test parameters,
such as the output voltage on insulation testing as well as the
resistance value in MΩ.
Visible and audible safety warnings are paramount when testing
high-energy systems and the MFT1701 series includes full input
protection and safety warnings when a hazardous voltage is present.
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, further testing is inhibited and a warning beep sounds.
The MFT1731 features internally rechargeable batteries and charger
with a charge time of less than 4 hrs, so reducing the cost of
ownership.
Fully compliant with all requirements of IEC 60364 derived standards
including VDE 0100 and BS 7671, the new MFT includes all the latest
measurement technology in a light-weight compact design, fully
protected and usable on single phase and 3 phase installations.
Key measurement functions include two and three wire non-trip loop
test technology for fast repeatable results, comprehensive testing
of RCDs including type B, and integrated 3-terminal and stakeless
clamp techniques for earth electrode testing.
The MFT1731 and MFT1741 includes built in memory and Bluetooth®
communications for downloading test results using Megger
Download Manager (supplied).
The new MFT1701 series has been designed for tough environments
and ultimate reliability. Features include a rubber over mould for
extra protection and grip, IP54 protection against dust and water and
an EN61010 CAT IV safety rating. Its class leading input protection
ensures the MFT can withstand accidental misuse and voltage
transients when other testers can’t.
All this in an intuitive and easy to use instrument with no hidden
menus or complicated screens. Tests are easily selected using the
colour coded rotary switches with results clearly displayed on the
high contrast, dual measurement, backlit display.
Included with the instrument: standard 3-wire leadset and a mains
test lead, a switched probe for fast and easy testing*, a full 12-month
calibration certificate and warranty upgradeable to 3 years. The
MFT1711 and MFT1721 are supplied in a robust moulded case, and
the MFT1731 and MFT1741 is supplied in a large soft pouch with
plenty of additional space for optional extras like a few tools and the
earth electrode test kit, comprising 2 spikes and 3 long test leads.
* model dependant
** requires optional accessory
PRODUCT SELECTION CHART
MFT1711 MFT1721 MFT1731 MFT1741
Insulation ranges
100 V nnn
250 V, 500 V n n n n
1000 V n n n n
Test voltage display n n n n
Adjustable buzzer threshold nnn
Continuity and resistance ranges
200 mA test n n n n
15 mA test nnn
Adjustable buzzer threshold n n n n
Loop testing
2 and 3 wire non-tripping L-PE
50 V ~ 280 V
n n n n
2 wire Hi current L-N 50 V ~ 280 V n n n n
2 wire phase to phase L-L
50 V ~ 500 V
nnn
PSCC and PFC (20 kA max.) n n n n
Max. Zs display n n n n
R1 + R2 value n
Touch voltage display on faulty earth n n n n
Earth electrode test
2 and 3 pole ** n n
3 pole ART and Stakeless method ** n n
RCD tests
1/2, 1, 5 x I and ramp RCD test n n n n
Auto RCD test n n n n
Type AC, A and S RCDs n n n n
Type B (pure DC) RCDs nnn
Programmable RCD n n n n
3-phase RCD (no earth) nnn
30, 100, 300 and 500 mA RCD n n n n
10 mA and 1000 mA RCD 10mA nnn
Other features
Supply measurement n n n n
True RMS n n n n
Leakage current measurement ** nnn
Phase rotation nnn
Calibration certificate n n n n
Rechargeable batteries
(charger included)
n n
SP5 Switched probe included nnn
Warranty upgradeable to 3 years FREE n n n n
On board memory with Bluetooth®
download
n n
CAT IV 300 V / CATIII 600 V n n n n
Hard moulded case n n
Soft pouch with additional storage n n
Confidence meter noise reduction n
New hardware loop test platform n

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MFT1711, MFT1721, MFT1731 and MFT1741
Multifunction Tester
SPECFICATIONS
Insulation test
Output voltage -0% +20% at rated load or less
Voltage display ±3% ±3 digits ±0.5% of rated voltage
Short circuit current 1.5 mA nominal test current
Test current on load 1 mA at min pass values of insulation
Insulation accuracy
1000 Volts 10 kΩ ~ 999 MΩ ±3% ±2 digits
500 Volts 10 kΩ ~ 500 MΩ ±3% ±2 digits
>500 MΩ ±10% ±4 digits
250 Volts 10 kΩ ~ 250 MΩ ±3% ±2 digits
>250 MΩ ±10% ±4 digits
100 Volts 10 kΩ ~ 100 MΩ ±3% ±2 digits
>100 MΩ ±10% ±4 digits
Resistance and continuity
0.01 Ω ~ 99.9 Ω ±2% ±2 digits
100 Ω ~ 99.9 kΩ ±5% ±2 digits
Open circuit voltage 5 V ±1 V
Test current (0 Ω ~ 2 Ω)
205 mA ±5 mA
15 mA ±5 mA
(user selectable)
Loop test
Live to earth/neutral supply
48 V ~ 280 V (45 Hz ~ 65 Hz)
Live to live supply (not MFT1711)
48 V ~ 500 V†† (45 Hz ~ 65 Hz)
L-N/L-L tests ±5% ±5 digits
L-E tests †
0.1 Ω ~ 39.9 Ω ±5% ±5 digits ± noise margin
40.0 Ω ~ 1000 Ω ±10% ±5 digits
Display range 0.01 Ω ~ 1000 Ω
Live to earth PFC range 20 kA
Live to live PSCC range 20 kA
†Reference conditions apply
†† MFT1711 280 V
For test environments see service data
RCD tests
Supply up to 100 mA 48 V ~ 480 V** (45 Hz ~ 65 Hz)
Supply up to 1 A 48 V ~ 280 V
RCD type Type AC, A, S
Type B (pure dc)
No trip test (1/2xI) –10% ~ –0%
Trip test (1xI, 2xI and 5xI) +0% ~ +10%
Ramp test
Touch voltage
(0 ~ 253 V) +5% +15% ±0.5 V
Trip time ±1% ±1 ms
Trip current ±5%
Step increments
VAR (variable RCD selection)
10 mA ~ 50 mA 1 mA steps
50 mA ~ 500 mA 5 mA steps
500 mA ~ 1000 mA 10 mA steps
Supply measurement
Voltage 10 V ~ 600 V
(15 ~ 400 Hz) True RMS
±3% ± 1 V ±2 digits
Phase rotation indication
L1–L2–L3 and L1–L3–L2
Frequency 15 Hz ~ 99 Hz ±0.5% ±1 digit
100 Hz ~ 400 Hz ±2.0% ±2 digits
Frequency resolution 0.1 Hz
Power supply
MFT1711 and MFT1721:
IEC LR6 type AA alkaline
(6 cells - supplied)
MFT1731 and MFT1741:
1.2 V NiMH
(rechargeable pack of 6 – supplied)
Mains charger for on-board re-charging (4 hours typical) 12 V car
charger (cigar lighter lead - optional)
Earth / ground test
Resolution 0.01 Ω
Current 0.45 mA or 4.5 mA
Noise rejection 20 V pk/pk (7 V rms)
Max probe resistances Rp and Rc
100 kΩ @ 50 V
5 kΩ @ 25 V
2 and 3 pole method (0.01 Ω ~ 1.999 kΩ)
±2.0% ±5 digits
ART method (1.00 Ω ~ 1.999 kΩ)
±5.0% ±5 digits**
Stakeless method (1.00 Ω ~ 199 Ω)
±7.0% ±5 digits**

SALES OFFICE
Megger Limited
Archcliffe Road Dover
CT17 9EN England
T [phone]
E [e-mail]
MFT1711--MFT1721--MFT1731--MFT1741_DS_en_V04
www.megger.com
ISO 9001
The word ‘Megger’ is a registered trademark
MFT1711, MFT1721, MFT1731 and MFT1741
Multifunction Tester
ORDERING INFORMATION
Description Order Code
MFT1711-BS 1008-121
MFT1721-BS 1008-123
MFT1731-BS 1008-128
MFT1731-PS 1008-130
MFT1741-BS 1009-986
Included accessories
Printed quick start guide
Full user guide on CD
Calibration certificate
Switched probe SP5 (not supplied with MFT1711) 1002-774
Neck strap - Megger embroidered 2001-509
3 Wire lead set with prods and clips 1001-991
Mains plug test lead (BS1363) 6220-810
AC battery charger (MFT1731 and MFT1741 only) 1002-736
Optional accessories
PowerSuite Lite 1000-631
Fused 10 A test lead set (red/blue/green) with
prods and clips 1001-975
ETL30 Extension Test Lead 30 m 1000-215
ETL50 Extension Test Lead 50 m 1000-217
Cigar lighter adapter for battery charging. 6280-332
Switched Probe SP5 (silicone) 1001-687
MCC1010 Current measuring clamp 1010-516
MVC1010 Voltage Clamp 1010-518
Electrode kit (MFT1731 & MFT 1741 only) 1001-810
Test and carry pouch 1006-408
Large soft pouch with extra storage 1007-463
3 Pole Earth Test Kit 6210-160
Current
(via optional clamp meter)
±5.0% ±3 digits.
Range 0.1 mA to 200 A ac
Resolution 0.1 mA
MV sensor input
(NOT MFT1711 or MFT1721)
Including temperature (third party module)
±1.0% ±2 digits
Range 0.0 mV to ±199.9 mV dc
Resolution 0.1 mV
Data storage
(MFT1731 and MFT1741)
Capacity: 1000 results
Bluetooth®communication
Safety IEC 61010-1:2010
IEC 61010-30:2010
IEC 61010-031:2008
600 V Cat III / 300 V Cat IV
(Max Phase to Phase 600 V)
IEC 61557:2007 parts 1 to 10
EMC IEC61326 edition 2 location class B
Operating temperature range and humidity
-10 °C ~ +55 °C
90% R.H. at +40 °C max
Storage temperature range and humidity
-25 °C ~ +70 °C
Maximum altitude 2000 m
Weight (instrument and case)
1 kg (with batteries, excluding case)
Dimensions (instrument and case)
MFT1711 and MFT1721
150 mm H x 85 mm W x 235 mm D
MFT1731 and MFT1741
220 mm H x 390 mm W x 285 mm D
IP rating IP54
Calibration temperature
+20 °C
Temperature co-efficient
<0,1% per °C
For test environments see service data.
The word PowerSuite is a registered trademark of Megger Limited.
The Bluetooth®word mark and logo are owned by the Bluetooth
SIG, Inc. and any use of such marks by Megger is under licence.