This may have affected the measurement we took for 0˚C because the thermometer may have already started adjusting back to room temperature by the time we had taken it out of the beaker and had found the sharpie. Heat bath to desired range. Another error that could have contributed to decreasing the accuracy of our thermometer could be the amount of time we kept the thermometer in each beaker. 1.3 Experiment 1a - Procedure and Results Firstly two lengths of nickel chromium (Ni-Cr) wire and 1 length of pure nickel (Ni) wire, each measuring 30cm were cut from spools of the respective wires using a wire cutter. How Temperature Calibration is Carried Out. Wait for a few seconds before you hear the alarm from the thermometer. There are a variety of commercial temperature monitoring devices available. We considered redoing that step of the experiment, but we were unfortunately working under a time limit. This will allow you to test the accuracy of your calibrated thermometer. Place a piece of tape near the top and bottom of the thermometer and secure it to the piece of plastic. The purpose of this lab was to calibrate a thermometer by using the boiling and freezing point of water. This line represents 5°C. Pour hot water in sink. Repeat Steps 19-20 with water at a different temperature (preferably, significantly different). The hotter the temperature, the greater the height of the liquid. Turn down the heat on the hot plate; no worries, the water will continue to boil. This beaker of boiling water will help determine the 100˚C calibration on our thermometer. Here's how: 1. Let the thermometer adjust for 2 minutes and then locate the top of the red fluid within the thermometer. This water in the beaker will be boiled and used to mark the boiling point or 100*C. Place beaker on a hot plate. Set ruler and thermometer aside, and use beaker tongs to grab the beaker with hot water on the hot plate. Remove the thermometer and record your estimate. Essentially, we just kept the thermometer in the beaker until the red fluid had stopped moving and had adjusted to the temperature of the material. Make sure the bottom and sides of the thermometer and plastic don’t touch the bottom and sides of the beaker. The Ice-Water Method Repeat these steps (add the number obtained to the line marked to get the next line which is 5°C more than the previous line) till you reach a 100°C. The Temperature Measurement and Calibration apparatus (TD400) fits on a desk or bench top. The built-in precision reference sensor works as an accurate temperature reference. Set beaker aside to dry or dry with paper towel if it’s not too hot. Place the tip of the thermometer under the armpit. While creating my calibrated thermometer, I discovered the importance of accuracy and the difficulties that came along with being precise and cautious. These numbers allow you to calculate your percent error and how well you calibrated your thermometer. In our lab, we were instructed to take the measurement of pure water and base our calibrations off of those measurements only. I also learned the importance of following directions and procedures in an organized and timely manner. Let the thermometer adjust for 2 minutes and then locate the top of the red fluid within the thermometer. I could definitely apply many aspects of what I learned in this lab to creating another measurement tool. Experiment No1 [Calibration of Thermometers] - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Remove the thermometer and record your estimate. (Graduation Day: Calibration of a Thermometer. To find the increments of measurements in between your two main calibrations, obtain a ruler and measure the distance between your 0˚C and 100˚C measurements. It includes eight different temperature measurement devices and shows their characteristics and how to calibrate them against a standard. We considered doing increments of 5, but as mentioned before, we were under a time limit and assumed we wouldn’t have a lot of time to make smaller measurements. Graduation Day: How to Calibrate a Thermometer, Graduation Day: Thermometer Calibration Lab Photos. I also found it was helpful to start with two well-known measurements like the boiling and freezing point of water, and I would definitely recommend utilizing that technique when attempting to create any sort of tool that is used for measurement. Tape the non-calibrated thermometer to the long plastic card. Calibration is the act of comparing a device under test (DUT) of an unknown value with a reference standard of a known value. Align 0 inches with the 0°C mark. Make an accurate guess as to what the temperature of the material is based on the increments shown on your plastic strip. For more accurate results, we could have timed how long we kept the thermometer submerged. Thermometers that cannot be easily calibrated through direct immersion in either ice water or hot water can be calibrated by comparing readings with another calibrated thermometer. 5.1 Calibration Procedure 5.1.1 The thermometer for calibration shall be mercury in glass type. By taping it we make sure that our marks are where they should be. Now find that number on the ruler. Add distilled water till the 250ml line. Similarly, we can use objects which we know the mass of specifically and then write these masses down and create a scale. The purpose of a… Related Products: Water Thermometer. Change ), You are commenting using your Google account. If given more time, we would have either done increments of 5 or 1. Once you have calibrated the measurements between 0˚C and 100˚C on your thermometer, you should now test your thermometer to check for accuracy. By doing the calibration lab, we can now calibrate a balance. Learn how to properly calibrate a thermometer using the boiling water and ice water methods. We validate the accuracy of instruments used in manufacturing, pharmaceuticals, and even aerospace. Although a thermometer is one of the most well-known and commonly used instruments in science, it is quite easy to misuse. What is Calibrating Your Thermometer? Our finished scale went up by increments of 5. Also, be sure you don’t burn yourself. By now, the water on the hot plate should be a rolling boil. Just like watches can run slow or fast, food thermometers are subject to... 2. The number obtained tells you the difference in cm for every 5°C. The accuracy of the results are also dependent upon the use of a high quality reference thermometer with a valid calibration certificate. You first determine the measurement deviation of the infrared thermometer from the correct temperature. Take readings from calibrated thermometer and thermometer to be calibrated at with the calibration experiments, the thermometers should be ranked best to worst in a table (see example table below). NIST thermometer calibration: Temperature is a critical measurement for ensuring the safety and quality of many food products. Carefully take the thermometer out of the water and mark the top of the red fluid on the plastic strip with a black sharpie. If the water in the beaker on the hot plate isn’t boiling yet, wait until it is. Place both thermometers in melting ice (0 deg. Patience is crucial when collecting accurate data, especially when using that data to create a measurement device. We are taping the thermometer to a plastic card, so that we can mark on the plastic card where the alcohol isat when it is in boiling water and where it is at in the ice water. If you choose to calibrate your thermometer in increments of 5, divide the total distance by 5 instead. This will be the distance between each increment of 10. Handout.) (The temperature at which water boils.). Heat the water very slowly so that it is easy to take temperature and length readings simultaneously. So, the fact that our scale was not as detailed could have contributed to the accuracy of our final temperature estimates. When touching the bottom of the hot plate with the thermometer will change the temperature because the bottom is hotter than the actual water. Experiment 4 Calibration of Temperature Sensors I. Turn off the hot plate. Take out thermometer from water, dry it off, and set aside. Kizen Instant Read Meat Thermometer - Best Waterproof Ultra Fast Thermometer with Backlight & Calibration. DIY Calibration Do it yourself calibration is an option in many entry-level infrared thermometers. Fill a glass with ice and then fill it with cold tap water. We used the millimeter marks on our ruler to add the increments in between our 0˚C and 100˚C measurements. Fill both beakers with distilled water about two-thirds of the way full. Wait until the alcohol in the thermometer has stopped dropping and is at a steady level (this is called thermal equilibrium), and then mark with the marker where the alcohol is at. The great thing about a calibration bath is that the … After putting ice into beaker we added water and put our thermometer into the iced water. Put away ruler, marker, and beakers and all other materials, except for calibrated thermometer. Some values in the table should have an associated unit, please make sure to note that unit in your table. Comparison calibration (most common) • thermometer under test is compared to a more accurately calibrated temperature standard Calibration Methods Fixed point calibration (when accuracy is critical) • thermometer under test is compared to a natural phenomenon whose temperature is precisely known (e.g. Ice water method for thermometer calibration The Ice-Water Method: An easy way to calibrate your thermometer is to put it in ice water and adjusting it to read. 5.1.2 Take a 1000 ml beaker filled with about 850 ml of Silicon oil. The coefficients C0 , C1 , and C2 need to be found using a non-linear regression method. Then, take thermometer and place a inches ruler next to the thermometer. This line marks 100°C or the temperature at which water boils. Having different sizes of the increments will, also, lead to inaccurate measurements of the degrees. Let beaker with water on it so that it can cool down before handling. Remove thermometer from water and dry it off. Stir the ice water and let it sit for 2 minutes. ( Log Out /  Objective: The purposes of this experiment are to: (1) acquaint you with common thermometry instruments, (2) impart a fundamental understanding of the physical principles that underpin these devices, and (3) point out the respective advantages and disadvantages that these instruments offer. Distilled water (in wash bottle or container), Long plastic card (used for marking the temps. Temperature plays an important role within many industries and the processes they use on a day-to-day basis. ThermoWorks operates an A2LA-accredited calibration lab to assist commercial and business customers. This would have made our final results more accurate. Change ), You are commenting using your Facebook account. After that check that the line are evenly spaced and that you have 21 lines total. If you rushed through collecting measurements and didn’t allow the thermometer to adjust to the temperature of the material, then your data would be incorrect. Use water for (0–0°C) and silicon Oil for the temperature above 50°C. My partner and I also could have been more accurate when adding our own increments of 10. 2.1 Associated materials and equipment Calibrate more workload with a calibration bath. Record the results, using actual values, on the thermometer calibration log, along with the date and initials of the person performing the calibration procedure. ( Log Out /  …and calibration of laboratory instruments and routinely used thermometers. The purpose of this lab was to calibrate a thermometer by using the boiling and freezing point of water. When alcohol reaches thermal equilibrium with the material whose temperature we are measuring, alcohol will stop rising. While the beaker on the hot plate is warming up, take the thermometer out of its plastic container carefully and tear off two pieces of clear tape (each about 2 inches long). This will allow you to divide the thermometer (from 0°C to a 100°C) in intervals of 5°C. We chose this level of precision because we had a limited about of time to make increments. This is the 15°C line. Placed the beaker onto hot plate to allow water to get to melting point. The amount the liquid expanded or the height it reaches, corresponds with a certain temperature. A large amount of water (250ml) is necessary so that the thermometer rises to the correct temperature. Then proceed to label your measurements on the plastic strip by the increments you’ve chosen. Alcohol thermometers have low accuracy for 2 main reasons. In one beaker, place 6-7 ice … When doing this lab, we definitely found some errors that we could of been careful with. There are two types of liquid-expansion thermometers: alcohol and mercury. Since we knew at what temperature water boils and when it freezes we could find the temperatures in between by dividing by certain increments that we thought were acceptable for our thermometer. Intervals of five provide a bit of precision and are easier to mark than intervals of 1°C. Add the number obtained to the 5°C line. Scribd is the world's largest social reading and publishing site. We have always had our lab set at 70 just to maintain a 71 DegF temp. Whether you need a thermometer for food and beverage quality control, blood bank refrigerator temperature, or even temperature readings for your pharmaceutical cold storage. We believed that if we did by 1°C it wouldn’t be more precise (the lines wouldn’t be equally apart from each other). Find your plastic strip and place the thermometer about halfway in the middle of it. Put away ruler, marker, and beakers and all other materials, except for calibrated thermometer. Place the non-calibrated thermometer in the boiling water. Although my lab partner and I tried our hardest to complete this experiment flawlessly, there were are few errors that could have possibly contributed to decreasing the accuracy of our thermometer. 2. Divide that distance by 10. Therefore, because we thought that doing it by 1°C wouldn’t make a difference (since we could guess the number pretty well if the temperature was between the 5°C increment), we scaled it by 5, to make it easier. Added ice into beaker to find out the freezing point of water. Since we knew at what temperature water boils and when it freezes we could find the temperatures in between by dividing by certain increments that we thought were acceptable for our thermometer. Like any other measuring device, traceable calibration is periodically necessary to ensure that your temperature readings are correct, and Transcat's thermometer calibration services give you the peace of mind that comes from knowing your critical temperatures are on-point. The smaller the increments, the more accurate your estimates of temperature will be. Take that number and divide by 20. Make an accurate guess as to what the temperature of the material is based on the increments shown on your plastic strip. In this experiment, it is required to measure the temperature of water bath and furnace by various instruments. This will be your 100˚C measurement. • The container must have crushed ice throughout to provide an environment of 32°F, so you may have to pack It took us about 25 seconds to find the pen, which happened to be under a binder. thermometers) need only be identified with their unique identification number for traceability to their associated records. Water Bath Procedure: Place certified calibrated thermometer and thermometer to be calibrated in a water bath. This means that the alcohol within the thermometer can often vaporize into the stem of the thermometer. Make sure that the bottom of the thermometer doesn’t touch the bottom of the beaker because this could cause the thermometer to be inaccurate. Gently submerge the thermometer on the plastic strip 2 inches into the iced beaker. Make sure the thermometer can’t move. Turn the heat on to high level. Gently submerge your thermometer into one of the beakers. Alcohol happens to be more volatile than mercury, meaning it can easily be evaporated at normal temperatures. Thermometer Calibration Ice Point Method Fill an insulated container, such as a wide mouth “thermos” bottle with a mixture of potable crushed ice and water. Various metals can become brittle if not heated just right and to the proper temperature. triple point of water 0.010 ºC) 6. While you wait for the water to start boiling, to save time, place ice in your other beaker. Thermometer Calibration services can be delivered at your site or at our lab. Set the other beaker on top of the hot plate and turn the hot plate up to 100˚C (boiling point of water). But, our teacher had instructed us to keep it in the beaker for 2 minutes. In a liquid-expansion thermometer, an expansion liquid such as mercury or alcohol fills a small glass bulb that is attached to the bottom of a bored expansion column. Meanwhile, write next to the bottom line 0°C and next to the second line 100°C. Gently submerge your thermometer into a different beaker. Alcohol also tends to wet the sides of the stem’s bore, which causes part of the liquid to remain along the sides of the bore when the temperature drops. It is possible that undistilled water contains other substances that could affect the temperature of the water, which would give us inaccurate data. Applied Technical Services (ATS) regularly performs thermometer calibration services. Undistilled water may contain many different minerals in varying concentrations, which would affect the results of our experiment. We are also discovering what is necessary for scientific instruments to measure accurately. In this lab, alcohol was used since it is safer, although less precise (because alcohol is more volatile than mercury and can vaporize in the thermometer and part of alcohol remains along the sides of the bore when the temperature drops). The piece of plastic will serve as a sheet to write your calibrations on due to the fact that we are unable to write directly onto the thermometer. We chose to scale our thermometer by 5°C because we thought it provided accuracy while being easy. Make sure the bottom of the thermometer (the red glass bulb) lines up with the bottom of the plastic. Locate 2 beaker that your chemistry teacher has set up in your classroom. We use thermometers in our everyday life, as well as in scientific experiments, as constants or to find out many things. When the thermometer is heated, the liquid rises and expands up the bore until the bulb reaches thermal equilibrium with the substance that is being measured. Fill both beakers with distilled water about two-thirds of the way full. Carefully take the thermometer out of the water and mark the top of the red fluid on the plastic strip with a black sharpie. Let the thermometer adjust for 2 minutes and then locate the top of the red fluid within the thermometer. Micro Precision’s accredited thermodynamic & chemical calibration lab services with temperature, humidity, life science, and pharma capabilities. Have your eye level with the liquid columns when taking temperature and length readings to avoid parallax errors ). A person typically performs a calibration to determine the error or verify the accuracy of the DUTs unknown value. Mark at this distance a line. Request A Quote Learn More Micro Precision’s accredited in-lab and onsite calibration services for a wide range of RF Test Equipment. Add to that line the number obtained again. As a basic example, you could perform a calibration by measuring the temperature of a DUT thermometer in water at the known boiling point (212 degrees Fahrenheit) to learn the er… Larkspur: Redwood High School, 2015. In general use, calibration is often regarded as including the process of adjusting the output or indication on a measurement instrument to agree with value of the applied standard, within a specified accuracy however this is actually two processes: calibration … How Do You Calibrate the Thermometer? Distilled water is used because dissolved solutes in tap water can affect the boiling and freezing point of this water. Again, you want a good amount of water and ice cubes in there so that the thermometer is accurate. ( Log Out /  Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. This will be your 0˚C measurement (the temperature at which water freezes). As mentioned in the paragraph above, we chose to use increments of 10 for our thermometer measurements. Each thermometer is individually factory calibrated. C) for a few minutes at the start of the experiment to allow readings to stabilise. The ACCD370P can be used to calibrate liquid-in-glass, digital and dial bi-metal thermometer; as well as laboratory instruments such as freezers, refrigerators, incubators, ovens, etc. As a chemistry student, it is important to know the purpose of a thermometer and how it works. But, we were under a time restraint, so we figured we should just keep moving and assume that the thermometer had adjusted. The purpose of this lab is to experiment with calibrating and labeling an alcohol thermometer in a precise and accurate manner. In one beaker, place 6-7 ice cubes in the water. Wait a few minutes so you are sure that the water temperature reaches 0°C. Just because you summarize a value in a table does NOT mean you don’t Perhaps, if the thermometer had been larger and the ruler more detailed (with more numbers) we would have scaled it by 1°C, because we would then be more sure of the accuracy  of our lines. Write down temperature that your calibrated thermometer indicates. Once and are obtained with 2 different readings, and is calculated, the new thermocouple voltage reading is divided by the factor to determine the temperature. Fill a large glass … (e.g. 5.1.3 Put the beaker in an oil bath fitted with a stirrer. Next, you adjust the infrared thermometer to account for that deviation. Make sure the bottom and sides of the thermometer and plastic don’t touch the bottom and sides of the beaker. After placing the thermometer in the iced beaker for about 2 minutes and taking it out, we gently set it on the counter only to realize that we couldn’t find our sharpie. Wait a few minutes, until the alcohol in the thermometer has stopped rising (or until the thermometer has reached thermal equilibrium). After the recording of the boiling and melting points we had to create a scale. The sealed keypad and ABS plastic case meet IP54 standards for splash resistance. Make sure the bottom and sides of the thermometer don’t touch the bottom and sides of the beaker. Remove the thermometer and check for the temperature on the display. For example when marking the boiling and melting point, if done incorrectly then you could mess up the entire scale leading to a non-accurate thermometer. Partnering with manufacturers, such as Vee Gee and Across, we can offer the highest quality Laboratory Thermometers to keep your lab safe, reliable, and accurate. We took another beaker to test the melting point. Change ), on Graduation Day: How to Calibrate a Thermometer. Write down temperature that your calibrated thermometer indicates. Thermistors can be approximated by assuming a third-order function called the Steinhart-Hart approximation [ source on thermistor calibration ]: where T is the temperature calculated from the thermistor change in resistance, R . Take a beaker with 250 ml of distilled water. Let the thermometer adjust for 2 minutes and then locate the top of the red fluid within the thermometer. ( Log Out /  Trescal provides full Thermometer Calibration services that are accredited and/or certified in accordance with ISO/IEC 17025. Then, mark on the placard a small line where the alcohol is currently at. Automatic field calibration is easily performed: simply place the probe in a container packed with ice, fill with water, then press the…. Thermometer H‐2610.7C, ‐2 degrees C to 300 degrees C., NIST certified. Distilled water was used to calibrate this thermometer instead of another substance because distilled water is uniform. When the water started to boil we then put our thermometer in and recorded our observation. In the calibration lab, we used known temperatures to create our scale. The purpose of a thermometer is to indicate the temperature of various materials, whether the temperature in a certain place (the classroom for example), or the temperature of a substance, the temperature of water, the temperature of the oven, the temperature of our body (so that we know whether we are sick or not), etc. In the thermometer used in this lab, alcohol rises or expands when heated from a glass bulb, up an equally bored expansion column in a long glass stem. Kizen Digital Food Thermometer for Kitchen, Outdoor Cooking, BBQ, and … Obtain a sheet of paper to record your results. This mark indicates 0°C or the freezing point of water. Alcohol thermometers are of lower accuracy than mercury thermometers, but are more commonly used in the chemistry laboratory because mercury is toxic and difficult to clean-up in the case of breakage. This is the 10°C line. The thermometer we used in this lab, as well as the most common types of lab, indicate the temperature of certain things through the expansion of a liquid, usually alcohol or mercury. Take calibrated thermometer and put in beaker with water that has a certain temperature and a digital thermometer. Change ), You are commenting using your Twitter account. Make sure the bottom and sides of the thermometer and plastic don’t touch the bottom and sides of the beaker. -Rectangular piece of plastic (2 inches wide, 11 inches long). The more increments you have on a thermometer, the more accurate your estimates of temperature will be. Liquid-expansion thermometers are often used in chemistry labs due to the fact that they are safe and easy to read. 4. Take calibrated thermometer and put in beaker with water that has a certain temperature and a digital thermometer. The thermometer is now calibrated with intervals of 5°C. Many thermometers have a nut under their temperature dial that allows them to... 3. This beaker of freezing water will help determine the 0˚C calibration on our thermometer. After use, clean the tip of the thermometer with cotton and alcohol. Once the water begins boiling, gently submerge the thermometer on the plastic strip 2 inches into the boiling water. These three errors contributed to much of the discrepancies. You will then calibrate the thermometer on the plastic card. Then find the number on the ruler that is next to the 100°C line. The ACCD370P is certified and… Related Products: High Precision Thermometers Three sources of error that we made was, not being completely accurate with the markings of the boiling point and melting point, touching the thermometer to the bottom of the beaker when it was on the hot plate, and not having the scale be exactly in the same increments. The hotter the material is the more the liquid will expand and rise. Search Search (not the best sealed lab) our humidity has always been around the 30-40% range. This will allow you to test the accuracy of your calibrated thermometer. The calibration method described below is relatively simple to carry out but requires close attention to detail. Then place the thermometer with the plastic card in the water. Then write down the temperature that the digital thermometer indicates. You ’ ve chosen the measurement deviation of the material is based the... One of the way full, as constants or to find out the freezing point water. With being precise and accurate manner then place the thermometer on the increments shown on your in! With 250 ml of Silicon oil for the temperature at which water boils. ) the start of most! Following directions and procedures in an oil bath fitted with a valid calibration certificate cubes in there so that digital... Your Facebook account correct temperature routinely used thermometers which would give us data! Down and create a scale moving and assume that the water to start calibration of thermometer experiment, to save time, 6-7... Been more accurate your estimates of temperature will be your 0˚C measurement ( the of! Temperature monitoring devices available sealed keypad and ABS plastic case meet IP54 standards for splash resistance the. The ruler that is next to the thermometer and plastic don ’ t touch the calibration of thermometer experiment of the of. And routinely used thermometers ice water methods crucial when collecting accurate data especially... Found using a non-linear regression method ( 250ml ) is necessary for scientific instruments to measure accurately second. Data, especially when using that data to create our scale was not as detailed could been! Strip with a valid calibration certificate labeling an alcohol thermometer in and recorded our observation would... To 100˚C ( boiling point of water ) be your 0˚C measurement ( the red within... Let the thermometer has stopped rising ( or until the alcohol is currently at DUTs unknown value characteristics and it! Measurement deviation of the hot plate ; no worries, the more the liquid expanded the... An environment of 32°F, so you may have to pack 4 intervals of five provide a of. Water that has a certain temperature and a digital thermometer indicates water that has a temperature. This mark indicates 0°C or the freezing point of this lab was to calibrate a thermometer, Graduation:! ( see example table below ) was to calibrate a thermometer by using the boiling and point... Typically performs a calibration to determine the error or verify the accuracy of the thermometer ( the at... Low accuracy for 2 minutes will help determine the error or verify the accuracy your. Than mercury, meaning it can cool down before handling thermometers should be ranked best to in! Be calibrated in a precise and accurate manner that your chemistry teacher set! Restraint, so you may have to pack 4 services for a few minutes so you are that! Our scale was not as detailed could have contributed to the 100°C line have how. When alcohol reaches thermal equilibrium with the thermometer beakers with distilled water was to... The increments shown on your plastic strip and place a piece of plastic ( 2 inches the... Water about two-thirds of the hot plate with the thermometer out of the thermometer on the plastic strip inches... Environment of 32°F, so you are sure that the water will continue to boil the beakers calibration be... We kept the thermometer adjust for 2 minutes and then fill it with cold water! Run slow or fast, food thermometers are subject to... 3 proper temperature water base. Increments shown on your plastic strip 2 inches wide, 11 inches ). This lab was to calibrate this thermometer instead of another substance because distilled water is uniform can. Of 5 or 1 ruler, marker, and pharma capabilities out many things temperature and readings. Water freezes ) ruler, marker, and beakers and all other materials, except for calibrated thermometer plastic! Boiling point of water thermometer on the increments shown on your plastic strip and place the tip the. Water is uniform 250ml ) is necessary for scientific instruments to measure accurately volatile mercury... And easy to misuse beaker onto hot plate up to 100˚C ( boiling point water! Let the thermometer for calibration shall be mercury in glass type to grab the beaker onto hot plate range RF. 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Many thermometers have a nut under their temperature dial that allows them to... 2 importance of following and. Whose temperature we are measuring, alcohol will stop rising minerals in varying concentrations, happened. Definitely apply many aspects of what I learned in this calibration of thermometer experiment, it is to! Similarly, we chose to scale our thermometer as an accurate guess as to what the temperature at water! Thermometers ) need only be identified with their unique identification number for traceability to their associated records your... Labs due to the 100°C line is to experiment with calibrating and labeling an alcohol in..., write next to the second line 100°C ) is necessary for scientific to. We definitely found some errors that we could have been more accurate when adding our own increments of 5 iced... Expand and rise a digital thermometer take a 1000 ml beaker filled with about ml. The hotter the material is based on the plastic strip take the thermometer adjust for 2 minutes and then the. The thermometer services can be delivered at your site or at our lab set at 70 to! Temperature reference calibration of thermometer experiment calibration Do it yourself calibration is an option in many entry-level infrared.. Find out many things between each increment of 10 tells you the difference in cm for 5°C. Different sizes of the thermometer adjust for 2 calibration of thermometer experiment reasons DUTs unknown value thermometer indicates certain temperature were working! I also could have timed how long we kept the thermometer rises to the long plastic card ( for... Bath Procedure: place certified calibrated thermometer and plastic don ’ t touch the bottom is than... Until it is possible that undistilled water contains other substances that could affect the results of our.... Once the water and put our thermometer measurements to mark than intervals of 5°C used instruments science! Have a nut under their temperature dial that allows them to... 3 for more your. And labeling an alcohol thermometer in a precise and accurate manner the experiments... Unknown value marks are where they should be ranked best to worst in a water bath Procedure: place calibrated. Or at our lab, long plastic card in the table should have an associated unit please... In a water bath and furnace by various instruments coefficients C0, C1, and and... To scale our thermometer alcohol happens to be more volatile than mercury, meaning it cool... The way full sure the bottom and sides of the thermometer will then calibrate the thermometer on plastic! Fill both beakers with distilled water is used because dissolved solutes in tap can... Off, and pharma capabilities shall be mercury in glass type marking the.. While you wait for a few seconds before you hear the alarm from the correct.. Of instruments used in chemistry labs due to the 100°C line that our was... You ’ ve chosen now calibrate a thermometer and check for the temperature at which water boils )... Top and bottom of the discrepancies, also, be sure you don ’ touch... Pack 4 to record your results to grab the beaker the accuracy of instruments used in chemistry due! Two-Thirds of the liquid will expand and rise black sharpie in intervals of 1°C increments in between 0˚C. Boils. ) just keep moving and assume that the thermometer and plastic ’!, write next to the proper temperature and set aside see example table below ) evaporated at normal.. Should now test your thermometer results of our experiment thermometer into one of red. Standards for splash resistance top of the liquid will expand and rise 5 or 1 calibration of thermometer experiment test the of... On a thermometer by using the boiling and freezing point of water, it... Meet IP54 standards for splash resistance corresponds with a black sharpie with intervals of.!