Good afternoon,
I have found an old Robin R.C.C.B. tester. Model number 5402D in its original case.
I used it to test an R.C.D. socket in the kitchen and it displayed 8mS at 30 mA. I wondered just how accurate this reading was, so I then tested the same R.C.D. socket with a new Multi T tester.
The result? Exactly the same, 8mS.
The old Robin tester must date back to the 80s or 90s. I am impressed.
Z.
