What is Zero Error?
We define zero error as the condition in which the measuring device registers a reading when there should not be any reading. There are two types of zero errors that are,
- Positive Zero Error
- Negative Error
Positive Zero Error
In the case of the positive zero error, the reading is positive and away from the actual reading of 0.00 mm. That is if the reading is 0.06 mm in this case, then the zero error is +0.06 mm.
Negative Zero Error
In the case of the negative zero error, the reading is negative and away from the actual reading of 0.00 mm. That is if the reading is 0.06 mm in this case, then the zero error is -0.06 mm.
Zero Error in Vernier Callipers
Zero error in vernier Callipers is the error that occurs when the jaws of the Calliper are closed and the zero mark on the vernier scale does not coincide with the zero mark on the main scale. Zero error can be either positive or negative. Positive zero error means that the vernier scale is ahead of the main scale, while negative zero error means that the vernier scale is behind the main scale.
In the case of the Vernier Calliper, the zero error is calculated using the formula,
Actual Reading = Main Scale + Vernier Scale
Vernier Calliper
Vernier Calliper is a precision measuring instrument used to measure the internal and external dimensions of an object. It consists of two main parts:
- A Fixed Jaw
- A Movable Jaw
The fixed jaw is used to measure the outside of an object, while the movable jaw is used to measure the inside of an object. This is a device that is used to measure very smaller values and it can measure the value in the range of 0.1 mm.
In this article, we will learn about Vernier Calliper, its diagram, working, and others in detail.