Megger MTB7671/2 Instrument Test Box
The Megger MTB7671/2 is a multifunction instrument test box designed to verify the continued accuracy of installation testers between formal calibrations. Housed in a robust carry case, it enables on-site checks of insulation resistance, continuity, loop impedance, RCD operation, and voltage measurement functions. This portable checkbox supports compliance with standards such as BS7671, BS EN 61557, and IET On-Site Guide recommendations.
Colour-coded test points and clear pass/fail indicators simplify use, while included result cards and test labels help maintain a documented record of performance checks.
Features and Benefits
Verifies key tester functions - insulation resistance, continuity, loop impedance, RCD operation, and voltage measurement
Helps confirm instrument performance between calibrations
Built-in test points for 250V, 500V, and 1000V insulation resistance values (includes 9M and 90M test loads)
Continuity testing with 0.5 and 5 values; confirms correct voltage and current levels
RCD test simulation at 10mA, 30mA, and 100mA
Loop impedance testing for both trip and no-trip methods
Designed not to trip RCD-protected circuits
Supplied in a hard protective transport case
Supports traceability and best practice in line with IET guidelines
Includes record cards and adhesive test labels for equipment logging