MFT1741+

Multifunction Tester

APPLICATIONS: PRODUCT SELECTION CHART

The MFT1741+ offers a wide range of test functions, designed for all MFT1741+
electrical installation testing and verification of low voltage building
Insulation ranges
wiring and distribution testing scenarios. The MFT1741+ is IEC
100 V n
61010 CAT IV 300 V rated for safe connection anywhere within the
LV network on single and 3 phase systems. 250 V, 500 V n

1000 V n

Test voltage display n

The unique modern styling allows it to be operated while stood on
Adjustable buzzer threshold n
the floor, whilst up a ladder or platform, and optimised for hanging
Continuity and resistance ranges
around the user’s neck. Dual TEST and LOCK buttons - one pair at
each end - makes the testers easy to operate left or right handed. 200 mA test n

15 mA test n

GENERAL FEATURES: Adjustable buzzer threshold n

Loop testing
Quick to pick up and use, the function controls are colour coded to
2 and 3 wire non-tripping L-PE 50 V ~ 280 V n
make range selection easy and fast. They also reduce the chance of
using the wrong function or range. The large crystal clear backlit 2 wire Hi current L-N 50 V ~ 280 V n

display uses the Megger digital/analogue arc, providing indication 2 wire phase to phase L-L 50 V ~ 500 V n
of fluctuating readings while the dual digital readout shows precise PSCC and PFC (20 kA max.) n
values of key measurements simultaneously with the test parameters, Max. Zs display n
such as the output voltage on insulation testing as well as the
R1 + R2 value
resistance value in MΩ.
Touch voltage display on faulty earth n
Visible and audible safety warnings are paramount when testing high- Earth electrode test
energy systems and the MFT1741+ includes full input protection and
2 and 3 pole * n
safety warnings when a hazardous voltage is present. If live voltages
3 pole ART and Stakeless method * n
exist on a circuit during insulation or continuity testing, the voltage is
displayed on the screen. If this voltage exceeds a safe level, further RCD tests
testing is inhibited and a warning beep sounds. The MFT1741+ 1/2, 1, 5 x I and ramp RCD test n
features internally rechargeable batteries and charger with a charge Auto RCD test n
time of less than 4 hrs, so reducing the cost of ownership. Type AC, A and S RCDs n

The new MFT1741+ has been designed for tough environments and Type B (pure DC) RCDs n
ultimate reliability. Features include a rubber over mould for extra Programmable RCD n
protection and grip, IP54 protection against dust and water and an 3-phase RCD (no earth) n
EN61010 CAT IV safety rating. Its class leading input protection
10, 30, 100, 300 and 500 mA RCD n
ensures the MFT can withstand accidental misuse and voltage
Auto sequence for EV charge point RCDs* n
transients when other testers can’t. All this in an intuitive and easy
to use instrument with no hidden menus or complicated screens. Other features
Included with the instrument: standard 3-wire lead-set and a mains Supply measurement n
test lead, a switched probe for fast and easy testing, a full 12-month True RMS n
calibration certificate and warranty upgradeable to 3 years warranty, Leakage current measurement * n
free of charge. The MFT1741+ is supplied in a large soft pouch with
Phase rotation n
plenty of additional space for optional extras like a few tools and the
Calibration certificate n
earth electrode test kit, comprising 2 spikes and 3 long test leads.
Rechargeable batteries (charger included) n

SP5 Switched probe included n

Warranty upgradeable to 3 years FREE n

On board memory with Bluetooth download

®
n

CAT IV 300 V / CATIII 600 V n

Hard moulded case

Soft pouch with additional storage n

Confidence meter noise reduction n

New hardware loop test platform n

* requires optional accessory

2
 MFT1741+
Multifunction Tester
SPECFICATIONS (Mode 1 + 2)

Insulation test Ramp test

Output voltage -0% +20% at rated load or less Touch voltage

Voltage display ±3% ±3 digits ±0.5% of rated voltage (0 ~ 253 V) +5% +15% ±0.5 V

Short circuit current 1.5 mA nominal test current Trip time ±1% ±1 ms

Test current on load 1 mA at min pass values of insulation Trip current ±5%

Insulation accuracy Step increments

1000 Volts 10 kΩ ~ 999 MΩ ±3% ±2 digits VAR (variable RCD selection)

500 Volts 10 kΩ ~ 500 MΩ ±3% ±2 digits 10 mA ~ 50 mA 1 mA steps
>500 MΩ ±10% ±4 digits 50 mA ~ 500 mA 5 mA steps
250 Volts 10 kΩ ~ 250 MΩ ±3% ±2 digits
500 mA ~ 1000 mA 10 mA steps
>250 MΩ ±10% ±4 digits
100 Volts 10 kΩ ~ 100 MΩ ±3% ±2 digits
>100 MΩ ±10% ±4 digits Supply measurement
Voltage 10 V ~ 600 V
(15 ~ 400 Hz) True RMS
Resistance and continuity
±3% ± 1 V ±2 digits
0.01 Ω ~ 99.9 Ω ±2% ±2 digits
Phase rotation indication
100 Ω ~ 99.9 kΩ ±5% ±2 digits
L1–L2–L3 and L1–L3–L2
Open circuit voltage 5 V ±1 V
Frequency 15 Hz ~ 99 Hz ±0.5% ±1 digit
Test current (0 Ω ~ 2 Ω)
100 Hz ~ 400 Hz ±2.0% ±2 digits
205 mA ±5 mA
Frequency resolution 0.1 Hz
15 mA ±5 mA
(user selectable)
Power supply

Loop test Batteries IEC LR6 type AA alkaline

(6 cells - supplied)
Live to earth/neutral supply
48 V ~ 280 V (45 Hz ~ 65 Hz) or 1.2 V NiMH
(rechargeable pack of 6 – supplied)
Live to live supply 48 V ~ 500 V (45 Hz ~ 65 Hz)
Mains charger for on-board re-charging (4 hours typical) 12 V car
L-N/L-L tests ±5% ±5 digits
charger (cigar lighter lead - optional)

†
L-E tests
Earth / ground test
0.1 Ω ~ 39.9 Ω ±5% ±5 digits ± noise margin
Resolution 0.01 Ω
40.0 Ω ~ 1000 Ω ±10% ±5 digits
Current 0.45 mA or 4.5 mA
Noise rejection 20 V pk/pk (7 V rms)
Display range 0.01 Ω ~ 1000 Ω
Max probe resistances Rp and Rc
Live to earth PFC range 20 kA
100 kΩ @ 50 V
Live to live PSCC range 20 kA 5 kΩ @ 25 V
2 and 3 pole method (0.01 Ω ~ 1.999 kΩ)
†
Reference conditions apply ±2.0% ±5 digits
For test environments see service data ART method (1.00 Ω ~ 1.999 kΩ)
±5.0% ±5 digits*
Stakeless method (1.00 Ω ~ 199 Ω)
RCD tests
±7.0% ±5 digits*
Supply up to 100 mA 48 V ~ 480 V (45 Hz ~ 65 Hz)
Supply up to 1 A 48 V ~ 280 V
Current
RCD type Type AC, A, S
(via optional clamp meter)
Type B (pure dc)
±5.0% ±3 digits.
No trip test (1/2xI) –10% ~ –0%
Range 0.1 mA to 200 A ac
Trip test (1xI, 2xI and 5xI) +0% ~ +10%
Resolution 0.1 mA
EV 30 mA ac, 6 mA dc (Mode 1 + 2)

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 MFT1741+
Multifunction Tester

mV sensor input
Including temperature (third party module)
±1.0% ±2 digits
Range 0.0 mV to ±199.9 mV dc
Resolution 0.1 mV

Data storage
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 ORDERING INFORMATION
Operating temperature range and humidity Description Order Code
-10 °C ~ +55 °C MFT1741+-BS 1012-611
90% R.H. at +40 °C max
Storage temperature range and humidity
Included accessories
-25 °C ~ +70 °C
Printed quick start guide
Maximum altitude 2000 m
Full user guide on CD
Weight (instrument and case) Calibration certificate
1 kg (with batteries, excluding case) Switched probe SP5 1002-774
Dimensions (instrument and case) Neck strap - Megger embroidered 2001-509
220 mm H x 390 mm W x 285 mm D 3 Wire lead set with prods and clips 1001-991
IP rating IP54 Mains plug test lead (BS1363) 6220-810
Calibration temperature AC battery charger 1002-736
+20 °C Large soft pouch with extra storage 1007-463
Temperature co-efficient
<0,1% per °CFor test environments Optional accessories
see service data. Fused 10 A test lead set (red/blue/green) with
prods and clips 1001-975
XTL30 Extension Test Lead 30 m 2007-998
The Bluetooth word mark and logo are owned by the Bluetooth
®

XTL50 Extension Test Lead 50 m 2207-997

SIG, Inc. and any use of such marks by Megger is under licence.
Cigar lighter adapter for battery charging. 6280-332
Switched Probe SP5 (silicone) 1001-687
MCC1010 Current measuring clamp 1010-516
MVC1010 Voltage inducing clamp, calibration 1010-518
check pcb (for stakeless test) and lead
Electrode kit 1001-810
Test and carry pouch 1006-408
3 Pole Earth Test Kit 6210-160
ETK30 (3 Pole Earth Test Kit) 1010-176

SALES OFFICE MFT1741+_DS_en_V01

Megger Limited www.megger.com
Archcliffe Road Dover ISO 9001
CT17 9EN England The word ‘Megger’ is a registered trademark
T +44 (0) 1304 502101
E UKsales@megger.com