Place the two small upper jaws inside the workpiece to be measured. Internal measurement can be obtained using the smaller upper jaws. When both jaws touch the workpiece, hold lightly, make sure the jaws of the digital caliper are perpendicular with the workpiece, then check the digital display for dimension. Push the movable head towards the workpiece. Place your workpiece in between the two jaws. Using the lower jaws, the external dimension can be measured. There are 4 basic type of measurement which a Digital Caliper can perform: Check the Digital Display for zero reading, push the zero point button to set to zero. Apply small force using your thumb so that the the two jaws do not separate from each other. After the jaws are cleaned, move the movable head towards the stationery jaw so that the two jaws surface completely contact each other. Do this a few times to make sure the jaws surfaces are clean. Then slowly pull the paper out of the jaws. Apply small force using your thumb so that the paper is pressed between the 2 jaws. Move the movable head towards the stationery jaw until it touches the A4 paper in between. Put the paper in between the 2 lower jaws. You can also use a clean piece of A4 paper. Make sure the opposing surfaces of the lower jaws which will contact each other are free from any particles or dirt by wiping using clean cloth. Please remember to always check for zero point before starting to use your digital caliper. The main use of a digital caliper is to measure the distance between 2 opposing sides.
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