# How to read Vernier Caliper

The laboratory uses a variety of measuring instruments for measurement. Each of these devices has a scale. Here’s how to use the Vernier caliper. This is a tool used to measure line length. The main scale and the Vernier scale are the two main components.

### Below are the parts of the Vernier caliper.

1. Outside Jaws
2. Inside Jaws
3. Depth Gauge
4. Main Scale
5. Main Scale
6. Vernier
7. Vernier gives interpolated measurements in thousands of an inch 0.001.
8. Retainer

Various measurements have been recorded on the Vernier caliper. but the simplest Vernier scale, introducing a 9 mm length parts 10 are the Vernier scale devised for this.

### The smallest measurement of a Vernier caliper

Ex:- Find the smallest measurement of a vernier caliper with a Vernier scale divided into 1mm unit and 20mm parts of the main scale.

Smallest measurement = the length of a partition of the main volume / number of variants of the volume

= 1/20

= 0.05mm

### How to Use Vernier Calipers and Get Measurements

• Consider the length of a beam.
• Take a beam and attach it to the outer jaws of the differentiator between the two spots.
• Keep it the same and tighten the watch.
• Then hold the vernier and note the number directly below its vernier scale.
• After multiply the value of the Vernier scale by the point at which the Vernier scale and the principal scale coincide.
• Then combine the two values.
`       0.1  x 4 = 0.4mm         33mm + 0.4mm 33.4mm     `

#### Uncertainty error

• A bug that causes Vernier to fail to determine the Vernier value that corresponds to a major scale mark.
• This is an accidental error. It cannot be removed.
• The fundamental error
• There is an error when the jaw is touching and the main scale zero and the vernier scale do not coincide. There are two types of this.

01. positive Zero Error

02. Negative Zero Error

##### 01. positive Zero Error
• A rusty texture reads when the jaws are pushed against each other when Rust / Glue is deposited between them.
• When you take a measurement, a certain amount of measurement is read.
• Increased thicknesses should be replaced by those reads.
• To measure the radius error, combine the two jaws, and get a general measure.
##### 02. Negative Zero Error
• In this case, the measurement of the jaws is less than the actual measurement.
• Then you have to add that reduced value.
• To find that shorter length, add the two jaws and use the following method.