0, 3
7,2
14,1
19,0
27,-1
33,-2

Why low all the time *SUPPOSE* the deviation is on the higher side .Lets take for eg 24.75C at the o/p but I dont know whether the actual data is 24.75C+0.6C OR 24.75C-0.6C ? where +/-0.6 is the error what will the lookup table do *NOW* .
If you took the time to look at the whole table (I know it is 6 lines - maybe too much) you would have seen that the last two corrections are negative.

I dont know.. As I posted, the table is generated durng calibration

Erik