Dickson, Phi Sigma Calibration recommends
What is Calibration?
A calibration is a comparison between two measurements. Dickson’s calibration lab will compare a device (unit under test) with a more accurate device (the standard). The standard tells us exactly where 70°F, 0°C, 137°F, etc. are. After the comparison is made we adjust the device under test so it reads the same as the standard