When I was first asked to write an article on “how to calibrate a thermometer”, I was ecstatic. But then I realized, not everyone had the equipment like I had as THE Calibrator of Industrial thermometers at the National Institute of Standards and Technology, (NIST). So, I had to change my thought process.
The first thing I recommend is to find a thermometer that has been calibrated by a Calibration lab that is traceable to NIST or Calibration lab that has been accredited. Once you have the calibration report, you can easily check your thermometer (this is for any type of thermometer, except a thermocouple) at that ice melting point (0oC) or at the boiling point of water (100oC). Set this up by making an ice bath of water and do not let the tip of your thermometer touch the bottom of the ice bath. Similarly, when measuring in a boiling water bath do not let the tip of your thermometer touch the bottom of your vessel. The liquid has to flow freely around the thermometer in order to get the correct temperature. However, in areas with high elevations and/or atmospheric pressures, then you will have to use a dry well block.
How do you get drywell block? How and where do you buy equipment to set up a calibration laboratory? Do you have a lot of equipment, but is the equipment outdated? Do you need to learn how to use them? Come to the Measurement Science Conference Symposium (MSC) to find the answers to all your questions on thermometry or other calibration questions.
MSC has plenty of classes from beginning to some advanced classes. The exhibit hall has vendors galore selling products that you can use to verify your calibrations. From drywell blocks to baths, and ice melting point cells. We will have vendors displaying and showing how to use their new equipment. Don’t miss this opportunity to advance your skills in your lab. See you at the conference!
About the Author
Dawn Cross, MSC Chairman of the Board, Retired from NIST
