Thermometer Calibration Ice Bath Method

Ice bath calibration the easiest way to test the accuracy of any thermometer is in a properly made ice bath.

Thermometer calibration ice bath method.

Make comparisons at various temperatures and record the errors. Ice bath calibration steps first you ll fill your clear glass to the top with ice. Use a tall glass so you have at least a few inches to dip the thermometer in and get an accurate measurement. Adjust your dial thermometer as directed by the manufacturer.

Alternately calibrate specific points by placing in a reference temperature bath such as a mixture of crushed ice and water. The advantage of this method is that an accurate thermometer will always read 32 f in a properly made ice bath regardless of altitude or atmospheric pressure. Hold the stem in the ice bath for 30 to 60 seconds. Your thermometer should read 32 f 0 c in the ice bath.

Stir the ice water and let it sit for 3 minutes. A procedure for the effective recalibration of liquid in glass thermometers author. The ratio of ice to water is important when creating an ice bath and starting with ice can help you regulate that ratio more easily. The ice method 1 fill a tall glass with ice.

However if you re not careful the ice bath can be off by several whole degrees. 1 1 calibrate thermometers by comparison with standard thermometers while immersed in stirred water or oil baths. Bulb volume change ice bath ice point its 90 liquid in glass thermometer recalibration thermometer created date. If you do this carefully your ice bath will be 32 f 0 c within 0 1 f.

Crushed ice is recommended for this step as pieces of crushed ice can sit closer together in the glass. Place your thermometer in the ice water making sure to stick the probe at least 2 inches into the mixture but not to touch the sides or the bottom.