As a result of the earlier thread on ESR testers, I ordered one from HK
which turned up yesterday. This one Ebay Item number: 171023267112

I must say I am quite impressed with its functions, except it keeps
crashing - which requires its battery to be removed to reset it and its
lack of any details or instructions.

I have accidently found it some built in diagnostics which has aroused
my curiosity. If two of the test pins are shorted, then the test button
is pressed, it carries out a series of seven diagnostic self tests in
sequence - T1 through T7.

As said, I'm struggling to find any information on this unit at all
particularly the T1 to T7 self tests - has anyone come across anything
which might be of use please?