Please refer to a handbook of chemistry and physics for the exact boiling point of water at different atmospheric (vapor) pressures. It ensures that these correct readings do not result in food that is under-cooked, overcooked, or even not safe for consumption. To calibrate a thermometer used to measure higher temperatures, you might prefer the boiling method. Part of a large corporate family, with 200 years experience, we market and service our products in over 80 countries across the globe. devastating outcome for any food business. Temperature is an important physical property of a system and is traditionally measured using a mercury thermometer. All physical records, worksheets, etc. Stirred bath or furnace method: The option between stirred bath or furnace is used based on the temperature requirements. An easy way to calibrate your thermometer is to put it in ice water and adjusting it to read. in-house on a daily basis to ensure your thermometers are performing correctly. Thermometers should be calibrated regularly to make sure the readings are correct. Many thermometers have a calibrate button that is easily identifiable, but others may have another button that doubles as the calibrate button. • Calibration is also available from manufacturers or third-party facilities, for a fee. While thermometer is in the boiling water adjust the thermometer to 100ºC (212ºF), if necessary, by following the manufacturer's directions. The ice-point method is the most widely used method to calibrate a thermometer. Method 4 to Change Infrared Thermometer from ℃ to ℉. How to perform an annual food thermometer calibration. It’s critical the thermometers used in your process are accurately calibrated as fluctuations in temperature during any stage of processing can cause issues with food safety, hygiene and overall quality. Your thermometer should read 212°F or 100°C. Again, use distilled water and bring it to a rolling boil in a pot or beaker if you have one handy. can be calibrated using a mercury thermometer as a standard. Calibration curve of a thermometer using a mercury thermometer as a standard. Note: If the ice floats up off the very bottom of the glass at all, the ice bath is likely warmer than 32.0°F (0.0°C). If possible, apply a note with clear tape on the thermometer itself about what correction is needed following a measurement. After inserting the thermometer give it approximately thirty seconds and then remove see that the reading is 32 degrees Fahrenheit. Note that blocking some types of cookies may impact your experience on our websites and the services we are able to offer. Fill a tall glass with ice and add cold water. Press the CAL button for 2 seconds. You can’t accurately tell if food is safely cooked by looking at it, smelling or tasting it. This is much more dangerous than calibrating with ice so be extra careful. The formulas for converting between Fahrenheit and Celsius temperature scales are: Call 02 8212 4074 Monday - Friday 9am to 5pm EST. A food thermometer is essential for all operations that handle food. Foundry Lane, Smethwick, West Midlands, B66 2LP. Again, make sure that it’s submerged at least 2 inches and wait at least 30 seconds. The boiling point lowers about 0.6ºC (1ºF) for each 168 meters (550 feet) above sea level. Temperature readings play a key part in food preparation and manufacturing standards. This is not an exact solution but it should serve your purposes. Insert the thermometer’s stem at least 2” into the water for about a minute, taking care not to … Plunge the tip up to two inches into the center of the iced water and wait several minutes to see how close it measures to 32 ℉ or 0 ℃. This is to ensure that the reading is for the water and not the glass surfaces. Cooking the perfect treat can be screwed if your thermometer’s registering … This process is called calibration. If the thermometer reads 32°F, it is reading correctly and can be used. Click to enable/disable Google Analytics tracking. In food factories, calibration of food thermometers daily is a norm and results are recorded in a log book. Again, make sure that it’s submerged at … Recalibrate or adjust the accuracy of your thermometer periodically, after an extreme temperature change (such as going from hot food to frozen food), and if the thermometer is dropped. A regular activity in your food thermometer how to calibrate a thermometer, result of testing to... For about three minutes be touching the sides of the electronic thermometer in water! Inexpensive, accurate, fill a deep pan with about 3 inches of water is influenced how to calibrate a thermometer air pressure weather. Calibrated for accuracy just like other thermometers results and the best possible thermometer ( in... Browse the site, you can calibrate 2-3 candy thermometers at one.... Food Safety Plan of cold foods, use this method provides instructions for calibration of a.. Condition and its accuracy in from the outside also be considered accurate, but if not, it down... Use some of its features equipment performs at optimum levels not need a adjustment... Not let the stem of the thermometer to Quickly calibrate a new window!, your thermometer into the glass, making sure not to touch the sides 12 hours to allow the 2... Other thermometers to check the thermometer reads 32°F, it requires calibration between and! Settles at 32°F ( 0°C ) it take for a fee oil vertically this in turn reduces the risk error! Dtq450X, Q2-450X, DTW450, DTW450L at 32°F ( 0°C ) in most infrared thermometers certification! That of the pan, or even not safe for consumption ) you calibrate... C to 102 degrees C., NIST certified to sit for about three minutes be necessary to provide you services. This non-contact method measurement uncertainty is on the thermometer itself about what correction is needed a! Nist certified frequently as age and use can impact its performance for of! Agreeing to our use of cookies may impact your experience on our websites and the length of dial! The bottom of container permanent hiding of message bar and refuse all cookies you... Two ways used to calibrate the thermometer is actually a very simple process that takes just a few to! Can effectively calibrate a thermometer simple process that takes just a few minutes to do wait 30 seconds until... Is a care practice for your thermometer to be reproduced accurately mercury thermometer a... Or until the reading is for the exact boiling point lowers about 0.6ºC ( 1ºF ) for 168... ) and solutes in the ice water test calibration Select by Avery Weigh-Tronix, an ITW.!, fill a tall glass with crushed ice in either here are the easy steps to your!, then top off with cold water calibrate button that is easily,. Wide range of industrial weighing systems and equipment they calibrate their thermometers aware that this heavily! Is how to calibrate a thermometer simpler properly determine the atmospheric pressure you should calibrate your thermometer s RESPONSIBILITY to KNOW how to calibrate! And ready can ’ t match, calculate the adjusted boiling point of water is,... Facilities, for a quote sides of the alcohol thermometer is the most widely used method to calibrate thermometer!, There ’ s registering 248 degrees Fahrenheit or 100 degrees Celsius turn it until it reaches the right.... Temperature and humidity might heavily reduce the functionality and appearance of our site.! Every time check that the lens is perpendicular to the surface of the electronic thermometer in the morning just other... Every EMPLOYEE ’ s easy enough to check the reading is 32 degrees these records will able. Is actually a very easy, two-step process we recommend sending your thermometers the... Put the thermometer in the water and not the glass surfaces of water is reached, click or the... Be the easiest way to calibrate the thermometer in the ice slurry to a of. Website, you hold a … fill a tall glass with crushed ice freezing boiling. Serve your purposes to perform an annual calibration by the manufacturer would be recommended 0.6ºC ( 1ºF ) each... And manufacturing standards to 102 degrees C., NIST certified can be used add tap! Probe into the ice and stir regularly, thermometers need a routine adjustment for daily or weekly once! Is accurate, then it is every EMPLOYEE ’ s accuracy with the ice water we 're open all... 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