In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Tracy Allen wrote:

re:calibration:
-- Wrap the comparison thermometers in aluminum foil together with the DS1620 on the cable.
-- Avoid sources of radiant heat.  A difference of 1 to 3 degrees F can occur quite naturally due to radiate sources, different absorption, and different heat capacities.   For calibration purposes, it helps to keep the DUTs in a dark box with an air flow, or in a stirred fluid.
-- Are you confident in the calibration of your reference thermometers?

re:DS1620
-- In one-shot mode, read temperature infrequently (once per second or less?)
-- Be sure to use a bypass capacitor 0.1 to 1 uF across the DS1620 right at its power terminals.

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