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    Vernier Caliper Lab Report

    Uploaded by

    Ko Qurban Ahmedli :/
    This report summarizes calibration and measurement procedures using a vernier caliper. Key points include: 1) Calibration involves examining the caliper for defects, cleaning it, checking for gaps between jaws, and verifying the zero setting. 2) Measurement involves placing the sliding jaw against the object, opening the jaws, reading the value while applying pressure with the locking screw. 3) Calculations use the main scale reading, vernier scale reading, and least count to determine the length. Results are recorded in a table.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Vernier Caliper Lab Report

    Uploaded by

    Ko Qurban Ahmedli :/
    164 views4 pages
    This report summarizes calibration and measurement procedures using a vernier caliper. Key points include: 1) Calibration involves examining the caliper for defects, cleaning it, checking for gaps between jaws, and verifying the zero setting. 2) Measurement involves placing the sliding jaw against the object, opening the jaws, reading the value while applying pressure with the locking screw. 3) Calculations use the main scale reading, vernier scale reading, and least count to determine the length. Results are recorded in a table.

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    Vernier Caliper Lab Report

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    This report summarizes calibration and measurement procedures using a vernier caliper. Key points include: 1) Calibration involves examining the caliper for defects, cleaning it, checking for gaps between jaws, and verifying the zero setting. 2) Measurement involves placing the sliding jaw against the object, opening the jaws, reading the value while applying pressure with the locking screw. 3) Calculations use the main scale reading, vernier scale reading, and least count to determine the length. Results are recorded in a table.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    164 views4 pages

    Vernier Caliper Lab Report

    Uploaded by

    Ko Qurban Ahmedli :/
    This report summarizes calibration and measurement procedures using a vernier caliper. Key points include: 1) Calibration involves examining the caliper for defects, cleaning it, checking for gaps between jaws, and verifying the zero setting. 2) Measurement involves placing the sliding jaw against the object, opening the jaws, reading the value while applying pressure with the locking screw. 3) Calculations use the main scale reading, vernier scale reading, and least count to determine the length. Results are recorded in a table.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 4

    Ministry of Education of Azerbaijan

    Baku Engineering University

    METROLOGY, STANDARDIZATION AND CERTIFICATION


    REPORT OF LABARATORY WORK № 1

    Department name: Engineering


    Faculty name: Mechanical Engineering
    Course: 3rd
    Group number:1309i
    Study Language: English
    Name and Surname of Teacher: Suleyman Soltanov
    Name and Surname of Student: Asaf Ibrahimov, Bika Mammadzade, Alinur Ahmedli

    Khirdalan – 2021
    Measurement and Calibration Procedure in Vernier Caliper Instrument

    Introduction
    Measurements in modern society are the basis of science and technology, are of paramount importance to
    take account of material resources and planning for domestic and foreign trade, to ensure product quality,
    interchangeability of units and parts and to improve technology, to ensure safety and other human
    activities.To ensure scientific and technical progress, metrology should ahead of other fields of science and
    technology in its development, because for each of these precise measurements are one of the main ways to
    improve them

    1.1 Aim
    To calibrate and realize measurement processes by given vernier caliper

    1.2 Apparatus
    The following are the apparatuses used in this experiment:
    1. Mechanical Vernier Caliper
    2. Digital Vernier Caliper
    3. Slip Gauges

    Fig.1 Mechanical Vernier Caliper

    Fig.2 Digital Vernier Caliper

    Fig.3 Slip Gauges


    1.3 Theory
    A vernier scale, is a visual aid to take an accurate measurement reading between two graduation markings
    on a linear scale by using mechanical interpolation, thereby increasing resolution and reducing measurement
    uncertainty by using vernier acuity to reduce human estimation error. It is using to calculate internal and
    external diameter of hollow cylinders.

    Principle

    The principle of the vernier caliper is that when two scales or divisions slightly different in size are used,
    then the difference between them is used to increase the accuracy measurement.

    Terminology
    Least count: The difference between the value of one main scale division and the value of one Vernier scale
    division is known as the least count of the Vernier. Least count of vernier caliper is the smallest value that
    we can measure from this device. To calculate the least count of vernier caliper is the value of one main
    scale division divided by the total number of division on the vernier scale. Let’s assume if the value of one
    main scale division is 1mm and the total number of division on vernier scale 10mm then the least count will
    be 0.1mm. Thus least count is defined as the smallest distance that can be measured from an instrument.

    Components

    1. Vernier Scale or Nonius

    2. Outside Jaws and Inside Jaws

    3. Depth Bar

    4. Locking Screw 

    Errors
    The possible sources of errors, which may result in incorrect functioning of the instrument, are as follows:

    1. Positive errors
    2. Negative errors
    3. No Zero error

    1.4 Calibration Procedure

    1. Carefully examine all gaging surfaces of mishandling that may affect accuracy of the instrument.
    Remove any positive surface imperfections utilizing a hard arkansas stone.
    2. Apply sufficient amounts of cleaning solution to dampen a lint free cloth. Carefully clean all exposed
    surfaces removing all foreign substances and particulate matter.
    3. Check jaws when in the closed position. Hold calipers to light source and visually examine for light
    between the jaws. Light will not be seen if these parallel jaws are touching each-other completely.
    4. Check edge jaws for wear when in the closed position. Caliper must be positioned squarely in line of
    sight to detect air gaps or surface imperfections between jaws.
    5. Verify zero setting of caliper by observing the indicated reading with jaws in the closed position. If
    caliper does not read 0.000, dial calipers can be easily adjusted to zero by loosening the bezel lock
    screw, then rotating bezel to align the zero graduation to the pointer.

    6. If any defects have been found at this point that would affect accuracy or function of the gage.
    7. Record all above readings on the Equipment Calibration Record.

    8. Repeat steps 4–8 for at least 20 trials so that the entire range of the micrometer is covered.
    9. Calculate the error and the percentage error.

    1.5 Measurement Procedure

    1. Place sliding jaw against upper step of object


    2. Open caliper jaws
    3. Turn Lock Screw
    4. Read Measured Value
    5. Final Tips

    Formula :
    Least count of vernier caliper = Smallest reading on the main scale/ Number of divisions on the vernier scale
    = 1mm/10 divisions = 0.1mm The length of the object is determined by using the formula Length = MSR +
    (VSR x L.C) MSR is the main scale reading VSR is the vernier scale reading L.C is the least count of the
    vernier caliper

    1.6 Tabular Recording

    Sr. Standard Reading of Measuring Jaws at Average Limit (mm)


    No. Length Position Reading
    Rods (mm)
    (mm) Upper Center Lower Min. Max.
    1 25
    2 50
    3 75
    4 100
    5 125

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