Thanks boys for your usefull information.

I will try to read the POT Value and as cocacolakid said the
degrees = (POT Value*141)/100
displaied on LCD.

Cocacolakid,A GUESTION?For POT Value max = 255 how I should find the scale?

Does anyone have an expirience using smaller R than the range of 5k-50k?
I am going to measure a POT = 700Ohm

Please any adittional information would be grate for me.

Regards
Nikos