The only one that fully tests your instruments to the regs.
Tests the full range of your tester’s capability not just what’s easy
Won’t trip RCD protected circuits
Checks insulation, continuity, loop and RCD functions of testers
Works with all testers for Part P Certification
The Megger MTB7671 instrument test box is produced by Britain’s premier test instrument manufacturer. For that reason it tests your testers to the requirements of British Standards.