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Megger MTB7671 Calibration Test Box

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£454.80 £379.00
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The Megger Test Box is the only device of its kind that fully tests your equipment to British Standards, making it an essential purchase for your testing needs.

Testing your equipment is vital, as certification bodies such as the NICEIC, ELECSA and others now request evidence of your tester's accuracy and ability to perform. This is where the Megger Test Box comes in, ensuring that it tests the full range of your tester's capability in order to ensure that everything is working correctly and efficiently.

The Megger Test Box won't trip RCD protected circuits, checks insulation, continuity, loop and RCD functions of your testers and performs a number of different functions such as insulation resistance, continuity, earth loop impedance, PFC, RCD and voltometer.

As standard, the Megger Test Box comes with record cards and self-adhesive test labels for recording your results.


There are a number of accessories available for the Megger MTB7671 Calibration Test Box. For further information, please contact our sales team. 

Our SKU Megger's Part Number Product 
1000-313 1000-313 Mains Lead MTB7671 
1007-163 1007-163 Lead Set for Megger Test Box MTB7671/2
2002-524 1007-162 Record Card Set (c/w test labels) for Megger Test Box MTB7671/2 


Accessories related to this product:
Part Code1002-224

Megger MTB67671 Technical Specifications

 BS7671 & BS EN61557 Tester RequirementsMTB7671 Test ParametersMegger Calibration Points
Continuity Short Circuit Test Current >200mA >200mA
PASS/FAIL indication
(threshold limits ±2%)
Continuity Test Voltage Range 4V - 24V 4V - 24V
PASS/FAIL indication
(threshold limits ±2%)
Continuity Resistance - 0.5Ω ±3% 0.5Ω
Insulation Test Current 1mA 1mA
PASS/FAIL indication
(threshold limits ±2%)
Insulation Test Voltages 250V +25% max
500V + 25% max
1kV + 25% max
250V + 25%
500V + 25%
1kV + 25%
PASS/FAIL indication
(threshold limits ±2%)
Insulation Test Resistance 0.25MΩ min
0.5MΩ min
1MΩ min

0.25MΩ ± 3%
0.5MΩ ± 3%
1MΩ ±3%
9MΩ ± 3%
90MΩ ±3%

Loop - Local mains impedance -
Loop + 1Ω - Loop + 1Ω (±5%)
Loop + 180Ω (IET On-Site Guide 10.3.5 Earth Electrode Resistance)
- Loop + 180° (±5%) 180Ω
RCD Currents (I) - 10mA, 30mA and 100mA -
RCD No Trip (1/2 I) No trip >1999ms -
RCD (I) <200ms 40ms @ 0°
50ms @ 180°
RCD (5 x I) <40ms 10ms @ 0°
20ms @ 180°
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