A caliper is a small mechanical device used to take accurate measurements. He has the upper jaw that measures the interior dimensions, and the lower jaw that measures outside dimensions. There are many different types of calipers and the caliper allows the use of an extension ladder to measure specific dimensions. It can measure accurately to a hundredth of a millimeter and a thousandth of an inch.
The caliper has two levels: the main scale, which shows a reading in millimeters or inches, and the Vernier scale that has 10 equal divisions. The final reading is based on the readings on the 2 scales.
- Familiar with its components of Vernier caliper
Studying the parts of the caliper. Take note that there are 2 ladders on the device: one on the top and one on the bottom. There are also two movable jaws. As the movement of the jaws, is one of the scales. The biggest jaw can be used to measure the exterior dimensions.
For inside dimensions, such as internal spaces or holes, use the jaws of smaller ones. The divisions on the main scale refer to a unit of measurement, 2 ticks after zero on the main scale reads as 2.0 (inches, millimeters, centimeters, depending on the unit of measurement).
Calibrating a caliper to get an accurate reading. Never forget that part. The main scale and the extension ladder should correspond to the zero mark. Completely close the jaws of the clamp to see if the zero marks are aligned with each other. Make changes to the Vernier if the zeros do not match. Close the caliper bolts tightly after the zeros are aligned. If you can not correct the misalignment, take note of the error. If the error is positive () value (Vernier zero is the right of the leading zero), subtract the final measurement for precise measurement. If the error is negative (-) value (Vernier zero is zero to the left of Main), add it to the final measure.
- Measurement of an object
Take an object and place the caliper jaws around it. Take a look at the scale at which relies Vernier. Check the tick on the Vernier scale is perfectly aligned with the main scale. Using the Vernier scale to zero as a reference mark for determining the number of ticks on the main scale.
- Read the measurement
Read the total number on the main scale closest to zero, the caliper brand. This number must be read on the left of the Vernier scale to zero mark. Now you have an approximate reading. To get an accurate reading, get the number of ticks on the Vernier scale that matches with a cross on the main scale. In reading, place a comma after the assembly number and add the number of ticks taken from the extension ladder to the right of the decimal point and you get an accurate reading.
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