Hi Skimask,
First thank you for your earlier info
Can you tell me how to find out wich configuration I have - how to calculate or find out in another way.

My code runs with internal OSC 8 MHz (I hope) but after leaving the PCB for some hours, it need time to start normal. Reading DS1990A and first time touching the probe nothing happens, second time all O.K - after about 10 sec all works normal and it also works if you touch direct after each other - touching of course allways with different DS1990A and after each reading the variable holding the code resets.

Config word: 20E4 0600