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Megger MFT1741+ Multifunction Tester

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1012-611
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The Megger MFT1741+ Multifunction Tester is suitable for troubleshooting and verifying the installation and safety of industrial, commercial and domestic fixed wiring installations. To this end, it includes all the tests required to complete the necessary electrical certification for these systems.

The Megger MFT1741+ Multifunction Tester is particularly well suited to testing low voltage electrical installations in areas with high electrical noise. Please see the table below for a quick overview of the Megger MFT1741+ Multifunction Tester’s testing capabilities and key features.

Insulation Ranges
100 V X
250 V, 500 V X
1000 V X
Test voltage display X
Adjustable buzzer threshold X
Note Includes input protection against live circuits up to 600V even when the insulation test is locked on.
Continuity and Resistance Ranges
200 mA test X
15 mA test X
Adjustable buzzer threshold X
Loop Testing 
2 and 3 wire non-tripping L-PE 50 V ~ 280 V X
2 wire Hi current L-N 50 V ~ 280 V X
2 wire phase to phase L-L 50 V ~ 500 V X
PSCC and PFC (20 kA max.) X
Max. Zs display X
R1 + R2 value -
Touch voltage display on faulty earth X
Earth Electrode Test
2 and 3 pole * X
3 pole ART and Stakeless method * X
RCD Test 
1/2, 1, 5 x I and ramp RCD test X
Auto RCD test X
Type AC, A and S RCDs X
Type B (pure DC) RCDs X
Programmable RCD X
3-phase RCD (no earth) X
10, 30, 100, 300 and 500 mA RCD X
Auto sequence for EV charge point RCDs* X
Other Features 
Supply measurement X
True RMS (Voltage and Frequency) X
Leakage current measurement * X
Phase rotation X
Calibration certificate X
Rechargeable batteries (charger included) X
SP5 Switched probe included X
Warranty from Megger upgradeable to 3 years FREE X
Onboard memory with Bluetooth® download X
CAT IV 300 V / CATIII 600 V X
Hard moulded case -
Soft pouch with additional storage X
Confidence meter noise reduction X
New hardware loop test platform X
Notes * requires optional accessory
X = Included
- = Not Included 

 

The Megger MFT1741+ Multifunction Tester is suitable for conducting full single- and three-phase insulation testing. As indicated above it is able to conduct single- and three-phase RCD testing between 10mA and 1A.

The Megger MFT1741+ Multifunction Tester’s NEW non-trip loop impedance testing technology also enables loop impedance testing of 10mA type AC and A RCDs. Additionally, NEW non-trip loop impedance technology prevents RCDs influencing the total loop impedance value and increases the speed of testing: non-trip loop impedance tests can be performed in eight seconds.

Furthermore, loop impedance tests are accompanied by a Confidence Meter, a NEW feature present on the Megger MFT1741+ Multifunction Tester. The meter will indicate the degree of confidence in the accuracy of the loop impedance measurement. This feature is useful as loop impedance values are particularly susceptible to changes in circuit noise. The Confidence Meter is designed to improve reliability; the digital ARC indicates the analytical process, and the measurement is continually monitored and adjusted in reference to the circuit noise.  

Another NEW function present on the Megger MFT1741+ Multifunction Tester is its ability to test electric vehicle charge point RCDs; it includes automatic test sequences and a 6mA DC test (requires OPTIONAL accessory) for this purpose.

Measurements are viewable via the Megger MFT1741+ Multifunction Tester’s large, clear backlit display with a digital/ analogue arc for indicating fluctuating readings and a dual digital readout that displays precise readings and test parameters in parallel. For instance, the dual digital readout will display the output voltage used for the insulation test as well as the resistance value in MΩ. It is also possible to save readings to the Megger MFT1741+ Multifunction Tester’s internal memory (capacity for 1000 measurements); these results can be downloaded via Bluetooth.

Accessing the required measurement function and range is easy using the Megger MFT1741+ Multifunction Tester’s colour coded function controls. In addition to improving the efficiency and ease of testing, these controls also reduce the possibility of selecting the incorrect function or range. This instrument does not include complicated and/or hidden measurement menus.

Furthermore, the Megger MFT1741+ Multifunction Tester features an ambidextrous design with dual TEST and LOCK buttons on either side of the unit, ensuring that it is easy to operate for both right- and left-handed users. Moreover, the Megger MFT1741+ Multifunction Tester offers an automatic test start, removing the need to press the TEST button altogether. This function is particularly useful when holding probes and/or when using the Megger MFT1741+ Multifunction Tester whilst on a ladder.

The Megger MFT1741+ Multifunction Tester has also been designed to stand independently; alternatively, it can be hung around the operator’s neck using the included neck strap. It is also equipped with internal rechargeable batteries that have a charge time of under four hours, allowing the user to maximise uptime.

The Megger MFT1741+ Multifunction Tester also features a rubber over-mould which provides additional protection in tough environments and has an IP rating of 54 ensuring that it is resistant to dust and water ingress.

Furthermore, the Megger MFT1741+ Multifunction Tester is EN61010 CAT IV safety rated: it is able to withstand accidental misuse and voltage transients. The Megger MFT1741+ Multifunction Tester’s safety rating also means that it can be connected anywhere within the low voltage network on the single and three-phase system.

Additionally, the Megger MFT1741+ Multifunction Tester will provide visual and audible warnings when a hazardous voltage is detected. If the Megger MFT1741+ Multifunction Tester detects a live voltage during insulation and continuity tests it will indicate the value of the voltage on the display; should this voltage exceed a safe level the Megger MFT1741+ Multifunction Tester will halt testing and issue a warning beep. These features not only protect the user but also work to prolong the longevity of the instrument.

The Megger MFT1741+ Multifunction Tester is a versatile, practical and reliable instrument suitable for measuring a variety of electrical parameters. It can be used for electrical installation and verification applications pertaining to low voltage building wiring, as well as distribution testing scenarios.

Megger MFT1741+ Multifunction Tester Key Features

  • Troubleshoot and verify the installation and safety of industrial, commercial and fixed wiring installations
  • Includes all the tests required to complete the necessary electrical certification for the aforementioned electrical systems
  • Ideal for testing low voltage electrical installations in areas with high electrical noise
  • Suitable for conducting full single- and three-phase compliant insulation testing
  • Conduct single- and three-phase RCD testing between 10mA and 1A
  • NEW non-trip loop impedance technology
  • Test 10mA type AC and A RCDs
  • Prevents RCDs from influencing total loop impedance values
  • Non-trip loop impedance tests can be performed in eight seconds
  • NEW Confidence Meter: indicates the confidence in the accuracy of the loop impedance result
  • Confidence Meter improves reliability: digital ARC indicates the analytical process, and the measurement is continually monitored and adjusted in reference to the circuit noise
  • NEW: test EVSE RCDs
  • NEW automatic test sequences for EVSE RCDs
  • NEW 6mA DC test (requires OPTIONAL accessory) for testing EVSE RCDs
  • Large, clear backlit display
  • Digital/ analogue arc indicates fluctuating readings
  • Dual digital readout: indicates the precise reading and the test parameters simultaneously
  • Internal memory: capacity for 1000 readings
  • Download measurements via Bluetooth
  • Colour coded function controls
  • No complicated screens
  • No hidden menus
  • Ambidextrous design: TEST and LOCK buttons on either side of the unit
  • Automatic test start: frees up the user’s hands for holding probes
  • Can stand independently
  • Can be hung around the operator’s neck using the included neck strap
  • Internal rechargeable batteries: recharge in under four hours
  • Rubber over-mould for protection in tough environments
  • IP54
  • EN61010 CAT IV safety rated: can withstand accidental misuse and voltage transients
  • Can be connected anywhere within the low voltage network on single and three-phase systems
  • Visual and audible warning when hazardous voltages are detected
  • Displays the voltage value when a live voltage is detected during insulation and continuity tests
  • When the detected voltage exceeds a safe level testing will be stopped and a warning beep is issued
  • A versatile, practical and reliable electrical tester

What’s Included?

  • Megger MFT1741+ Multifunction Tester
  • Printed Quick Start Guide
  • Full User Guide (CD)
  • Calibration Certificate
  • Megger SP5 Switched Probe
  • Megger Neck Strap
  • 3-Wire Lead Set with Prods and Clips
  • Mains Plug Test Lead (BS1363)
  • AC Battery Charger
  • Large Soft Pouch with Extra Storage

Megger MFT1741+ Multifunction Tester Technical Specifications

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 (user selectable) (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 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
Notes

† Reference conditions apply

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%
EV 30 mA ac, 6 mA dc (Mode 1 + 2)
(Mode 1 + 2) 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 
Batteries IEC LR6 type AA alkaline (6 cells - supplied) or 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*
Current
(via optional clamp meter) ±5.0% ±3 digits.
Range 0.1 mA to 200 A ac
Resolution 0.1 mA
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
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) 220 mm H x 390 mm W x 285 mm D
IP rating IP54
Calibration temperature +20 °C
Temperature coefficient <0,1% per °C For test environments see service data.
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Additional Information
SKU 1012-611
Manufacturer Part Code 1012-611
Country of Origin United Kingdom

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