Most controllers have a percentile range of accuracy. Say +/- 1%. Unless you are willing to pay megabucks for a laboratory grade controller or thermometer then allowing a 1 - 3 degree difference should be acceptable. If you are using a digital thermometer then make sure its a good one and have it calibrated or test it against a calibrated reference.
Doug
Last edited by seashells; 02-26-2006 at 04:27 AM.
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