I bought my HLT and Mash Tun with Fermentap thermometers. The HLT has a 2 inch thermometer and the other a 6 inch. I wanted to calibrate them so I made an ice water bath and boiled some water. At boil both thermometers read 210 in the ice bath the long meter read 36 and the short 39. So my question is, is the difference in readings enough to worry about? 3 degrees. I know there is usually some variance in the instructions for strike water temp and mashing temp. I just don’t know if I should adjust them to read the same and if I dial them both to 212 at boil are they going to be further apart in ice. Is this is a case where close is okay.
Thanks in advance,