To calibrate means to accurately assign a scale. Steps to calibrating a Thermometer 1. Place the bulb in a mixture of water and ice. 2. Mark the point at the top of the liquid as 0 o C. 3. Remove the bulb from the ice water and place in boiling water. 4. Mark the point at the top of the liquid as 100 o C 5. Divide the space between 0 and 100 into 100 even spaces. Each space will represent 1 o C.
Liquid in Glass Thermometer The lab thermometer contains colored alcohol rather than mercury for safety.
The Thermocouple Made of two wires of different metals. A temperature difference causes a current to flow through the wires. This current is measured by a meter. Can measure higher temperatures than typical thermometers.