[BillA]

when you have it caled ask for the points you want, say 5°C increments from 20 to 45
use The Meter Shop on Director's Row
w/o a good cal you are lost

of the many tools I've bought, no single one has had the impact on accuracy as the $900 spent on that thermometer (w/2 probes, all in cal)

EDIT
you after a sensor cal procedure ?