Hello all,
meanwhile, I received the relays, and as promised, I did the measurements of the isolation resistance.
The results look really good, and the isolation resistance is much higher, than it is specified inside the data sheet.
I measured for 1 part between all contacts, for the rest I measures less points, to safe some time here.
I have used turned IC contacts with an attached wire for easier contacting the pins of the relay. I handled the relays with tweezers, so the where not contaminated.
I also took a photo of the of the original relay compared to the COTO 9002 type.
I used 200V for testing, as this is the specification for the relay, 2nd reason was that I will get a higher current, as the K616 is in the lower range not so sensitive. I checked It with the K263, and sill got a good response when I impressed 0,05pA, but at these low current levels, the meter noisy.
Have a look at the results and please leave your comments below.
Guido