Multifunction Testers
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- Description
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Megger MFT1741 Multifunction Tester Details
The Megger MFT1741 Multifunction Tester is a comprehensive, sophisticated low voltage installation tester. It is the latest in Megger’s series of MFT1700 Multifunction testers and features a unique (patent-pending) algorithm for earth loop impedance testing.
This unique algorithm facilitates the Megger MFT1741’s ability to perform quick, repeatable 3-wire non-trip loop tests on noisy and quiet circuits. The results obtained from these tests are unaffected by RCD and RCBO impedance and the test itself will not trip a vast majority of RCDs and RCBOs, with the exception of 30mA Type B. Should the user wish to test a circuit containing these rare Type B RCD and RCBOs, he/she need only select the Type B loop test option. This multifunction tester is particularly well suited to testing circuits which include 10mA RCDs and RCBOs, such as those present in schools.
Further to this, the patent-pending algorithm ensures that all the results attained via the Megger MFT1741’s 3-wire non-trip loop tests are accompanied by an arc indicating the reading’s reliability. For instance, should the user perform a loop test on a quiet circuit the Megger MFT1741 will respond swiftly with a provisional reading accompanied by a large visual arc, indicating the readings uncertainty; once this reading has stabilised (after approximately eight seconds) the large arc will shrink to a single element, indicating that the reading is now highly reliable.
With regards to noisy circuits the tester will gradually reduce the arc as the reading becomes increasingly stable; however, should the noise in the circuit increase the size of the arc will also expand, indicating the result's increased unreliability.
In addition to performing 3-wire non-trip loop tests, the Megger MFT1741 Multifunction Tester can also be used to carry out a number of other loop tests, such as:
- 2-wire non-trip loop tests (no neutral)
- High-speed, 2-wire, high current loop tests on unprotected circuits
Like the Megger MFT1731, this product can also be used to test insulation and earth electrodes, as well as take continuity, resistance, frequency and true-RMS voltage measurements. Similarly, this product also features single and three phase RCD testing and phase rotation.
The results taken using the Megger MFT1741 Multifunction Tester are displayed on its large, LCD display with dual parameter indication: this multifunction tester can simultaneously display loop resistance and fault current, or insulation resistance and test voltage parameters. These results can also be stored in the Megger MFT17741’s internal memory or can be downloaded using its built-in Bluetooth connectivity.
Like its sister models, the Megger MFT1441 features a colour coded test selection and a robust casing which protects the instrument against dust and water ingress (IP54). Furthermore, this product also has a safety rating of EN61010 CAT IV and includes audible and visual safety warnings triggered by hazardous voltages. The Megger MFT1741 will also prevent further testing if a dangerous voltage is present.
The Megger MFT1741 Multifunction Tester with Loop Confidence Meter combines Megger’s MFT1700 easy-to-use, accurate and safe features with a new unique algorithm for earth loop impedance tests; thereby ensuring that this product is the most sophisticated and versatile of the Megger MFT1700 series.
Megger MFT1741 Multifunction Tester with Loop Confidence Meter
- NEW: Comprehensive low voltage installation tester with a unique, patent-pending algorithm for earth loop impedance testing
- NEW: Performs quick, repeatable 3-wire non-trip loop tests on noisy and quiet circuits
- NEW: Results are not affected by RCD and RCBO impedance
- NEW: 3-wire non-trip loop impedance tests will not trip a vast majority of RCDs
- NEW: Type B loop test option for performing 3-wire non-trip loop tests on circuits containing 30mA Type B RCD or RCBOs
- NEW: Ideal for conducting 3-wire non-trip loop tests on circuits including 10mA RCDs and RCBOs
- NEW: Built-in confidence meter: arc will decrease as the reliability of the reading increases
- 2-wire non-trip loop tests (no neutral)
- High-speed 2-wire high current loop tests on unprotected circuits
- Continuity measurements
- Resistance measurements
- Frequency measurements
- True-RMS voltage measurements
- Insulation testing
- Earth electrode testing
- Single and three phase RCD testing
- Phase rotation
- Large, LCD display with dual parameter indication
- Internal memory
- Bluetooth communication
- Robust casing
- IP54, protected against water and dust ingress
- Safety rating of EN61010 CAT IV
- Audible and visual safety warnings for hazardous voltage levels
- Prevents testing when hazardous voltage levels have been reached
- Colour coded test selection
What’s Included?
- Megger MFT1741 Multifunction Tester with Loop Confidence Meter
- Printed Quick Start Guide
- Full User Guide on CD
- Calibration Certificate
- Switch Probe SP5
- Neck Strap - Megger Embroidered
- Three Wire Lead Set with Prods and Clips
- Mains Plug Test Lead (BS1363)
- AC Battery Charger
- Large Soft Pouch with Extra Storage
Accessories
There are a number of additional accessories available for the Megger MFT1741 Multifunction Tester; please see the table below for details. For further information please contact our sales team prior to purchase.
- Accessories (16)
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- Technical Specs
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Part Code: 1009-986(Size: 394.3 KB)(Size: 431.1 KB)
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 (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 † 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% 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% ±3 digits
ART method (1.00 Ω ~ 1.999 kΩ)
±5.0% ±3 digits*
Stakeless method (1.00 Ω ~ 199 Ω) ±7.0% ±3 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 Standards 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 2000m 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 co-efficient <0,1% per °CFor test environments see service data. - Reviews
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