Calibrating Thermometers Protocol

Materials and Equipment Needed

  1. Thermometers
  2. Ice
  3. Hot plate
  4. Beakers
  5. Ringstand and clamp

Safety Issues

Use caution with the hot plate and let thermometers return to room temperature between measurements so the glass does not shatter.

Time Required

Varies with the number of thermometers to calibrate

Procedure

Step Image
Set up ring stand, clamp, and hot plate as shown.  Turn hot plate on and wait for water to boil. 

Place thermometer in boiling water and record reading after thermometer equilibrates.

Remove thermometer from boiling water and set aside to cool.
After thermometer cools, place it in a beaker of ice water and allow it to equilibrate.  Record the temperature.
Compare hot and cold readings.  Ideally the thermometers would be at 0oC and 100oC.  The next best thing is for the hot and cold readings to be off by a similar amount and direction.