Full single and 3 phase compliant installation testing
10 mA to 1 A single and 3 phase RCD testing
Earth testing and stake-less testing for electrode resistance measurement*
Simple colour-coded test selection
Ambidextrous operation
Internal memory and Bluetooth® communications
EN61010 CAT IV safety rating and tough IP54 case
Particularly effective in areas that suffer from high electrical noise, this instrument provides all the tests needed to complete the necessary electrical certifications for industrial, commercial and domestic fixed wiring installations.
Save time and get non-trip loop testing down to 8 seconds with the MFT1741+’s new Loop Impedance testing technology! This innovative ability also increases the accuracy of results as it prevents the RCD from influencing the total loop impedance value. What’s more, you can measure the degree of confidence in the accuracy of the measured loop impedance, thanks to Megger’s new Confidence Meter measurement analysis (patent pending). This technology uses the digital ARC to indicate the analytical process, then continually monitors and adjusts the measurement when circuit noise is present, resulting in a dramatically improved and repeatable test result.
You can even test electric vehicle charge points with the MFT1741+! It comes with an automatic EV Charge Point RCD test sequence, including the 6 mA DC test*.
Easy-to-use and quick to learn, this instrument has no hidden menus or complicated screens but instead has colour-coded function controls that make range selection simple and speedy. Additionally, it can be operated ambidextrously with dual TEST and LOCK buttons at both sides.
The MFT1741+ is designed for tough environments, with IP54 protection against dust and water and an EN61010 CATIV safety rating. Indeed, the MFT can withstand accidental misuse and voltage transients, keeping you safe on the job.
Voltage display: ±3% ±3 digits ±0.5% of rated voltage
Max service error: ±15% ±2 digits.
Short circuit current: 1.5 mA nominal test current
Test current on load: ≥1 mA at min. pass values of insulation
Output voltage tolerance: -0% +20% at rated load or less
Continuity / Resistance:
Intrinsic accuracy: ±2% ±2 digits (0.01 Ω to 99.9 Ω), ±5% ±2 digits (100 Ω to 99.9 kΩ)
EN61557 range: 0.1 Ω to 99.9 kΩ
Open circuit voltage 5 V ±1 V
Test current at 200 mA (0 Ω to 2 Ω): >200 mA @ ≤2 Ω
Test current at 15 mA (0 Ω to 2 Ω): >15mA @ ≤2 Ω
Max Service error: ±12% ±2 digits.
Loop test 2Hi (L-PE, L-N, L-L):
Intrinsic accuracy: ±5% ±3 digits
Display range: 0.01 Ω to 1000 Ω
Supply: 48 V to 480 V* (45 Hz to 65 Hz)
Test current high: 4.0 A (at 230 V)
PSCC range: 20 kA
EN61557 range: 0.30 Ω to 1000 Ω
Max service error: ±10% ±2 digits
Loop test 3Lo, 2Lo (L-E):
Intrinsic accuracy: 0.01 Ω to 39.9 Ω ±5% ±5 digits
40.0 Ω to 999 Ω ±10% ±5 digits
Display range: 0.01 Ω to 1000 Ω
Supply: 48 V to 280 V (45 Hz to 65 Hz)
Test current: Pulsed
PFC range: 20 kA
EN61557 range: 1.0 Ω to 1000 Ω
Max service error: ±10% ±2 digits
RCD test:
RCD type: AC, A, S, Type B (pure dc)
Intrinsic current accuracy:
No trip test: (1/2xI) –10% to 0%
Trip test: (1xI, 2xI and 5xI) +0% to +10%.
Ramp test current: ±5% ±1 digit
Trip time: ±1% ±1 ms
Programmable step increments: 10 mA to 50 mA - 1 mA steps, 50 mA to 500 mA - 5 mA steps, 500 mA to 1000 mA - 10 mA steps.
Supply: 48 V - 280 V 45 Hz to 65 Hz
Max service error: ±10% ±2 digits
Voltage:
Intrinsic accuracy: ±2% ±1 V
EN61557-1 Range: 10 V to 600 V
Phase rotation indication.
Max service error: ±5% ±2 digits
Frequency:
Intrinsic accuracy: ±0.5% ±2 digits
Resolution: 0.1 Hz
EN61557 Range: 15 Hz to 400 Hz
Max service error: ±5% ±3 digits
Earth Test Ranges:
Intrinsic accuracy: ±2.0% ±3 digits
ART method ±5.0% ±3 digits
Stakeless method ±7.0% ±3 digits
Resolution: 0.01 Ω
EN61557 range: 1.0 Ω to 1.99 kΩ
Current: 0.45 mA or 4.5 mA.
Noise rejection: 20 V pk/pk (7 V rms)
Max probe resistances: Rp, Rc = 100 kΩ @ 50 V
Max service error: ±20% ±3 digits
Current (via Clamp meter):
Intrinsic accuracy: ±5.0% ±3 digits
Resolution: 0.1 mA
EN61557 Range: 0.5 mA – 199 A
Max service error: ±10% ±2 digits
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
Internal memory
Capacity 1000 results
Bluetooth® communication
Power consumption:
Nominal minimum: 60 mA (Voltage range with no input voltage)
Nominal maximum: 350 mA (Active Insulation test set to 1000 V / 1 MΩ)
Range: -20 °C to +55 °C
Temperature (via 3rd Party Module):
Intrinsic accuracy: ±1.0% ±2 digits
Resolution: 1 °C
Range: -20 °C to +100 °C
Environmental Specification
Temperature
Operational range: -10 °C to +55 °C
Storage range: -25 °C to +70 °C
Humidity
Operating humidity: 90% R.H. at +40 °C max.
Altitude
2000 m to full safety specification.
Weight: 1000 g ±10% including batteries but excluding test leads, accessories and carry case.
Dimensions: 150 mm high x 85 mm wide x 235 mm deep (6 in. x 3.5 in. x 9.5 in.)
IP rating: IP54
Power Supply
Battery: Primary 6 x 1,5 V cells IEC LR6 type (AA alkaline,).
Battery: Rechargeable: 6 x 1.2 VNiMH cells EC HR6.
Display shows rechargeable [NiMH] when the battery type is changed in setup option (Section 10).
Safety / EMC
EMC In accordance with IEC61326 edition 2.
Locations: Class B locations.
Safety in accordance with BS EN 61010 -1 2010 + 61010 -30:2010
Installation Category: 600 V CAT III / 300 V CAT IV. (Max Phase to Phase 550 V)
In addition switch probe and test leads are designed to meet IEC 1010-031:2008, Double insulated to Installation Category III, 300 V phase to earth, 500 V phase to phase.
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on all orders
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
