Vernier calliper is a measuring device which is used to reach much more accuracy and precision as compared to a normal ruler. It is very useful for measuring small materials where the measurement needs to be accurate. It can also be used to measure the depth and breadth of materials. Earlier the callipers required to be measured through 2 different graduating scales and then get the actual measurement by using the formula. But the digital vernier calliper eases out the whole process. It shows the exact values digitally on the LCD display.
How to use
There are 3 ways you can measure things using vernier callipers, it depends on what you are measuring. Let’s take a simple example of a beaker. First of all, turn on the button to start measuring and put the calliper to zero. If it shows a non zero value, then press the absolute zero button to correct zero error, and now it’s set to be used. If the internal diameter of the beaker is to be measured, the vernier calliper would be put into it with the internal jaws touching the ends of the beaker, and then the value can be read. Now, suppose if you want to measure its outer diameter, you can use the external jaws and put the beaker between it and then read the LCD display values. Thirdly, If the depth of the beaker needs to be measured, you can just put the depth measuring blade inside and then read the values.
Common applications
1. To measure the diameter of a pendulum bob.
2. To measure the dimensions of the beaker.
Safety Measures to follow
1. Make sure that you don’t put excess pressure on the calliper while measuring.
2. Make sure that you eradicate the zero error in final readings.
Some example tasks that students can try out in the ATL Lab
Measure the dimensions (outer diameter, inner diameter and depth) of the beaker using a digital vernier calliper.
Important Links
How to use a digital vernier calliper
https://youtu.be/kXNAhGH4H_A1.
Working principle of a simple vernier calliper – ()
