Expansion box and conductivity probe does not work

So you have two conductivity measurements in two different systems/ tanks?
Then you have to use the temp probe that belongs to the same system like the conductivity probe that you would like to calibrate.
e.g. if you have two systems and use the same temp probe for both systems, one of the conductivity measurements won't work...

Hi

Yes I'm doing exactly as you suggested way sal1 and temp 1 and sal2 and temp2. It seems that the expansion unit is faulty. Can you please let me know where I cans send it for repair?

Hello,

I've sent you a PM.