Farzan LAB 3 Calibration

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School

Conestoga College *

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1030

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Mechanical Engineering

Date

Apr 3, 2024

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Uploaded by ChancellorSteel13670

L AB 3 Calibration Prerequisite: Chapter 9, Calibration Introduction: As indicated in the text, error is the enemy of measurement. To reduce the chance of error, we calibrate the measurement instrument to ensure readings given are as accurate as possible. Since each device exhibits its metrological features, it would be too time-consuming to focus on the calibration process on more than one instrument. Therefore, in this lab, we focus on calibrating a one to two-inch micrometer and provide insight into the calibration process and how it works. Items needed:  One to two-inch Mechanical Micrometer with a one-inch micrometer standard  Full set of SAE Gauge Blocks  A Spanner Wrench is required to set the zero point of the micrometer.  Cleaning solution (lubricant) Demonstration: EVERY STUDENT IS TO PERFORM THIS Confirm students can reliably read a one to two-inch mechanical micrometer with accuracy and precision to the fourth decimal point. Verify that students can use the micrometer standard and know how to "wring" gauge blocks together. Students must also understand how to clean and adjust the gauge blocks and micrometers.

N a m e: F ar za n K as a d D at e: 1 9- 0 7- 2 0 2 3 E XERCISE 1 Observation: THIS IS FOR EACH GROUP MEMBER Visually inspect the instrument. Using the classification of measurement errors guide ( Figure 9–5 ), identify and record any potential error attributes that may impact the calibration of a one to the two-inch micrometer. Complete the pre-calibration checklist ( Figure 9–7 ). The instructor will show how these are applied in the calibration process. The pre-calibration checklist (figure 9-7) can we refer per the below screenshot:

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E XERCISE 2: THIS IS FOR EACH GROUP MEMBER Calibration: Confirm the zero setting of the instrument by using the one-inch Gauge Block. Utilizing the supplied tool, adjust the instrument (if necessary) to achieve a zero setting. Verify the Flatness/Parallelism using the one-inch gauge block at 5 points between the anvil and spindle faces. Start a calibration process by using a 1.000", 0.149", 0.450", 0.650", 0.850", and 2.000"-gauge block. Take instrument readings against the appropriate gage block(s) findings to full scale. Take the readings in both Ascending and Descending directions and record those findings on a spreadsheet, including the zero-setting and the Flatness/Parallelism check. Wring gauge blocks together. EX: 1.000” + 0.149” = 1.149”. 1.000” + 0.450” = 1.450”. etc. Gauge: 1" to 2" Gauge: 0 to 1" Gaug e measurement Gaug e Measurement 1 1.00005 1 1.00005 1 1 1.00005 1.00005 1.00005 1.00005 1.00005 1.00005 1.149 1.14905 0.149 0.14905 1.14905 0.14905 1.149 0.149 1.14905 0.14905 1.149 0.149 1.45 1.4501 0.45 0.4501 1.4501 0.4501 1.4501 0.4501 1.4501 0.4501 1.4505 0.4505 1.65 1.65002 0.65 0.65002 1.65005 0.65005 1.65005 0.65005 1.65005 0.65005 1.65005 0.65005 1.85 1.85 0.85 0.85 1.85 0.85 1.85 0.85 1.85 0.85 1.85005 0.85005

E XERCISE 3: THIS IS FOR THE WHOLE GROUP Measurement confirmation: Create a graph similar to Figure 9–9, graphing both results on the same chart. Is the instrument linear? Is there any uncertainty? Is the tool accurate? The instructor will show how this procedure is to be accomplished. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Lab 2 Gauge Measurement readings Plotting the results on the graph shows there are no errors in the calibration measurement. This suggests that the instrument is linear and calibrated with acceptable standards.

R EPORT : THIS IS FOR THE WHOLE GROUP Have students report their findings for Exercises 1-3. Use the following sections to create your report. Objective: The objective of the experiment is to measure the size of the different gauge blocks using a digital micrometer. After measuring, we need to plot a graph against the measured and actual values to determine the difference in reading. Instrument(s) and items used: Cleaning solution. Cleaning wipe. Micrometer. Gauge blocks. Environmental concerns: Room temperature is required for the experiment to work. If we believe the block's temperature is high, give the gauge block some time to cool down to room temperature. An essential consideration is temperature, which may impact the experiment's results. We experimented with a room temperature of 23 degrees Celsius. Also, the room must be spotless and tidy before experimenting. Data: Gauge: 1" to 2" Gauge: 0 to 1" Gaug e measurement Gaug e Measurement 1 1.00005 1 1.00005 1 1 1.00005 1.00005 1.00005 1.00005 1.00005 1.00005 1.149 1.14905 0.149 0.14905 1.14905 0.14905 1.149 0.149 1.14905 0.14905 1.149 0.149 1.45 1.4501 0.45 0.4501 1.4501 0.4501 1.4501 0.4501 1.4501 0.4501 1.4505 0.4505 1.65 1.65002 0.65 0.65002 1.65005 0.65005 1.65005 0.65005 1.65005 0.65005

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1.65005 0.65005 1.85 1.85 0.85 0.85 1.85 0.85 1.85 0.85 1.85 0.85 1.85005 0.85005 Conclusion: The instrument was calibrated by comparing it with the standard gauges. We couldn’t find any errors during the measurement. Moreover, the graph plotted is linear, showing that the instrument works accurately and can be utilized for future lab experiments until the next calibration date. Finally, a calibrated instrument would produce accurate results in the industries, and therefore, we need to calibrate the instruments at particular intervals.