How is the zero error calculated in a vernier calliper?
How is the zero error calculated in a vernier calliper?
Zero error
The error which arises due to the incorrect gradation of the scales of the verneir calipers is called Zero Error.
1. No Zero Error: If the zero of main scale coincide with the zero of the Vernier scale then the instrument has no zero error.
2. Positive Zero Error: If the zero of the venier scale on the right of zero of the main scale then the zero error will be positive, but the zero correction will be negative. To find the positive zero error, look at the Vernier scale and not the number of divisions of the venier scale which coincide with one the main scale divisions and multiply this number by least count.
3. Negative Zero Error: If the zero of the Vernier scale is one the left of the main scale zero, then the zero error will be negative and zero correction will be positive. To find the zero error note the number of Vernier scale division which coincide with one of the main scale and multiply with least count.
Zero error
The error which arises due to the incorrect gradation of the scales of the verneir calipers is called Zero Error.
1. No Zero Error: If the zero of main scale coincide with the zero of the Vernier scale then the instrument has no zero error.
2. Positive Zero Error: If the zero of the venier scale on the right of zero of the main scale then the zero error will be positive, but the zero correction will be negative. To find the positive zero error, look at the Vernier scale and not the number of divisions of the venier scale which coincide with one the main scale divisions and multiply this number by least count.
3. Negative Zero Error: If the zero of the Vernier scale is one the left of the main scale zero, then the zero error will be negative and zero correction will be positive. To find the zero error note the number of Vernier scale division which coincide with one of the main scale and multiply with least count.
