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    Vernier Calipers

    Uploaded by

    Diana Yusof
    The document describes how to use a vernier caliper to measure lengths. A vernier caliper has a main scale in millimeters and a sliding vernier scale. To take a measurement, you read the main scale value immediately left of where the vernier scale aligns with it, then add that value to the decimal indicated on the vernier scale alignment. Examples show measurements of 3.7 mm and 15.8 mm being taken this way.

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    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd

    Vernier Calipers

    Uploaded by

    Diana Yusof
    146 views4 pages
    The document describes how to use a vernier caliper to measure lengths. A vernier caliper has a main scale in millimeters and a sliding vernier scale. To take a measurement, you read the main scale value immediately left of where the vernier scale aligns with it, then add that value to the decimal indicated on the vernier scale alignment. Examples show measurements of 3.7 mm and 15.8 mm being taken this way.

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    The document describes how to use a vernier caliper to measure lengths. A vernier caliper has a main scale in millimeters and a sliding vernier scale. To take a measurement, you read the main scale value immediately left of where the vernier scale aligns with it, then add that value to the decimal indicated on the vernier scale alignment. Examples show measurements of 3.7 mm and 15.8 mm being taken this way.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    146 views4 pages

    Vernier Calipers

    Uploaded by

    Diana Yusof
    The document describes how to use a vernier caliper to measure lengths. A vernier caliper has a main scale in millimeters and a sliding vernier scale. To take a measurement, you read the main scale value immediately left of where the vernier scale aligns with it, then add that value to the decimal indicated on the vernier scale alignment. Examples show measurements of 3.7 mm and 15.8 mm being taken this way.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
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    The document discusses how to use a vernier calipers to take accurate measurements.

    A vernier calipers uses both a main scale and sliding vernier scale to measure the outer, inner and depth dimensions of objects.

    You must note the main scale reading, vernier scale reading, convert units if needed, and add the two readings together.

    Using the vernier calipers

    An instrument which you use in the laboratory to measure lengths of objects is the vernier callipers. This instrument is based on a vernier scale. The vernier calipers has a main scale (in millimetres) and a sliding vernier scale. This instrument may be used to measure outer dimensions of objects (using the main jaws), inside dimensions (using the smaller jaws at the top), and depths (using the stem). In figure 1 below, the vernier scale is divided into 10 equal divisions and thus the smallest count of the instrument is 0.1 mm. Both the main scale and the vernier scale readings are taken into account while making a measurement. The main scale reading is the first reading on the main scale immediately to the left of the zero of the vernier scale (3.0 mm), while the second reading is the mark on the vernier scale which exactly coincides with a mark on the main scale (0.7 mm). The reading is therefore; 3.0 mm + 0.7 mm = 3.7 mm [The vernier calipers reading has only 1 decimal place.]

    Main scale

    Vernier scale
    Figure 1 : The reading here is 3.7 mm.

    Figure 2 : The reading here is 15.8 mm.

    Remember; Therefore;

    main scale reading + vernier scale reading = final reading 15.0 mm + 0.8 mm = 15.8 mm

    Another example: Note that the important region of the vernier scale is enlarged in the upper right hand corner of each figure.

    cm

    Main scale unit

    Vernier scale unit

    Figure 4: The reading is 37.46 mm. In figure 4 above, the main scale reading to the left of the vernier zero is 3.7 cm. The vernier scale reading that lines up with any main scale reading is 4.6 mm. Thus the reading is;

    Step 1 : Step 2 : Step 3 :

    Change the unit on the main scale from cm to mm. [Note: 1 cm = 10 mm] i.e. i.e. i.e. 3.7 cm x 10 = 37 mm 0.46 mm 37 mm + 0.46 mm = 37.46 mm Take the vernier scale reading. Add the main scale reading to the vernier scale reading. [Both in mm]

    Try the following yourself. 1

    cm

    Step 1 :

    Change the unit on the main scale from cm to mm.

    Step 2 :

    Take the vernier scale reading.

    Step 3 :

    Add the main scale reading to the vernier scale reading.

    Answer :

    cm

    cm

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