I was trying to check the equipment required for EICR testing and AFAIK, I see that the 6 in 1 like Megger 1825 can do all tests except for the functional and the visual inspection ones for obvious reasons.
- Continuity of protective and bonding conductors
- Continuity of ring final circuit
- Insulation resistance
- Polarity testing
- Earth electrode resistance
- Earth fault loop impedance
- RCD disconnection timing phase rotation test