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The low side (T1) an high side (T2) temperature clamps can be calibrated to ice water (32F). Accuracies of one degree or better are obtained by stabilizing a source of ice water preferably in an insulated cooler. Submerge low side (T1) temperature clamp into the ice water and begin meter calibration procedure:
Low side (T1) must be saved before calibrating high side (T2).
Repeat the same procedure to calibrate high side (T2).