Preparations For Using Vernier Calliper

Back in the 9th AD, the Qin Dynasty was said to be the original of the first recorded use of callipers. However, it was in 1631 that the first calliper with a secondary scale was introduced . This introduction was done by Pierre Vernier, he was a French Mathematician and his discoveries gave the calliper its name. This Vernier calliper reduced the margin of error. 

Use Of Vernier Calliper 

• It is mainly used for measuring internal and external dimensions /distance with high level accuracy. 

• These are most preferable among devices such as rulers or any other flat devices. 

• Its use is more because of its low error reading of 0.05mm or 0.0019 inches. 

Diagram of Vernier calliper 

Preparations Necessary For Using Vernier Calliper 

There are necessary preparations one should prepare before using the Vernier calliper in order to get the optimum and accurate results. Those preparations are as follows :- 

Understanding The Parts 

There are two jaws in a Vernier calliper . The bigger jaw is used for measuring the diameter of the external surface of any item whereas , the smaller jaws measure the internal diameter of various items. The Vernier scale is the scale which can slide and can expand or contract both the jaws of the calliper. There is another scale which is fixed, this scale is the main scale. Nowadays, there are some modern Vernier callipers which come along with a device for measuring  depth of any object. 

Learn To Read The Scales Of The Vernier Calliper 

The scale of a Vernier calliper and a ruler are pretty similar . They both have a main scale of inches and centimetres which have further smaller divisions between themselves. The sliding or moving scale of the Vernier calliper has measurements which are 1/10th part of the smallest possible division of the main scale. So we can say that the calliper scale has the  normal sized readings whereas the Vernier scale is the more detailed scale of readings used for better accuracy of measurements . 

No Dirty Object 

The object which is to be measured should be clean because minute quantities of dirt can result in wrong measurements. This is so because the Vernier calliper and its readings are very accurate and measure even the smallest of measurements. 

Get Clarity About The Divisions 

The person using the Vernier calliper should observe the number of divisions present between each number of the scale, so that the measurement of that small division is known to the person. 

Locking The Screw 

There is a locking screw in the Vernier calliper which needs to be kept loose as it keeps the stability of the device intact while not being used. To get it loose the screw should be turned in a clockwise motion and to get it tight turn it in anticlockwise motion. 

Avoiding The Zero Error 

In order to avoid the zero error the person should be careful about the jaws of the calliper being closed and that the reading is initially zero . In cases where the person does not place the jaws properly can result in a zero error. 

Conclusion

The Vernier calliper came as a blessing as a measuring device for objects . Since its introduction it has been widely used all over the world for experimentation and measuring. If people execute it’s working properly and eliminate the zero error then it provides one of the most accurate readings a person can get.