At first glance, a caliper is difficult to understand. But with the right technology, you can easily read the measurements. We will show you step by step how to do it exactly.
The correct operation of calipers
Step 1: Open the slider and clamp the workpiece to be measured between the two lower jaws. The same procedure is used to determine an inner diameter, however, using the upper measuring jaws and inserting them into the opening.
Step 2: Press the movable jaw firmly against the workpiece
Step 3: Fix the movable jaw by tightening the screw
Step 4: Read off the measurement (always at the zero marks) on the centimeter scale
If the zero stroke does not exactly hit a millimeter line, then you can perform a more accurate measurement through the vernier scale. For example, if the approximate measurement is 24-point, you can see which line of the (lower) vernier scale exactly matches a millimeter line of the upper centimeter scale. If, for example, the 9 of the vernier scale coincides with a line on the upper scale, the value to be determined is 24.9 mm.
YOU MUST PAY ATTENTION TO THIS WHEN READING THE VALUES
Although there are the reading aids such as vernier scale, round scale and numeric display, it is not always so easy to get an exact reading.
Therefore, before you start measuring, you should be aware of the following:
- Both the meter and the surfaces and objects to be measured should be clean
- While measuring, there should be enough light so that you can see the numbers accurately
- Note the reference temperature: This is 20 ° C.
- Do not use too much force on the device or objects during the measurement
- Make sure that you always put your thighs flush with the surface or directly against the object for exact results
- With a caliper with the digital numeric display, make sure that the battery for the display has enough energy and the contacts are clean
Tips for quick readers
- Clamp workpiece
- fix movable slide
- Read centimeter by the scale
- Match scale centimeters and vernier search
- read exact value
Instructions: Correct reading of calipers
- First, we measure the place of the decimal place. The digit before the decimal point is the number on the rail, which stands before the zero lines on the slider.
- To find the decimal place, find the stroke on the slider that exactly coincides with a dash of the track.
- Look closely and check every single stroke on the slider, even if you think you’ve already found the right value. The differences are minimal, so you can quickly enjoy yourself.
- If there is no stroke of rail and slider to one hundred percent, you can use a finer vernier or estimate the result with the most significant agreement. For a reliable result, you should look as vertically as possible on the lines.
THE CORRECT READING OF THE SCALES
Before you begin to measure your desired items, we would like to explain how to read the different scales correctly.
The most complicated is the reading of the values in a vernier, but once you have understood the principle, it’s quite fast. On the rod of the caliper is the so-called main scale, which can show you millimeters. The vernier is located at the bottom of the variable leg and is divided into 0.5 increments, i.e., 0, 0.5, 1, 1.5 up to the value 9. The millimeter value on the main scale is read off at the position where the vernier indicates 0, Should this 0 not show exactly on a millimeter marker, the reading help comes into play. Let’s say the caliper shows a reading between 39 and 40 millimeters. With the vernier, you can now determine the decimal places of the 39 millimeters. To do this, look at the vernier scale: The first marker of the vernier, which matches one of the marks on the main scale, is your decimal value. If, for example, the value 5 of the vernier coincides with one of the values on the main scale, then your reading is 39.5 millimeters.
ROUND SCALE DISPLAY
With a vernier caliper with around scale, reading is a bit easier. The pointer drive is always kept clean and is done with a rack and a pinion. You can adjust the dial to any size yourself.
DIGITAL NUMERIC DISPLAY
But the easiest way is reading with a digital numeric display.
There is not much to explain: just read the value on the display. You can choose between millimeters and inches on display.