What are the steps for using a vernier caliper?
2 Answers
Using a vernier caliper involves the following steps: 1. Put on gloves and take out the vernier caliper, then wipe the oil off the surface of the caliper with a cloth (to prevent rust) and close it. Check if the zero marks on the vernier scale and the main scale are aligned. If they are aligned, proceed with the measurement; if not, record the zero error. 2. During measurement, hold the main scale with your right hand and move the vernier scale with your thumb. Hold the object to be measured (external or internal diameter) with your left hand, positioning it between the outer measuring jaws. When the object is tightly against the jaws, take the reading (ensure both arms are firmly against the object). 3. When reading, first use the vernier scale's zero mark as a reference to read the millimeter integer on the main scale, then read the millimeter integer on the main scale again using the vernier scale's zero mark as a reference.
When it comes to measuring with a vernier caliper, I've summarized a set of steps through my own exploration. First, clean the tool and the object being measured to avoid dust affecting accuracy. Then, select the function based on the type of dimension: use the large jaws for external dimensions and the pointed jaws for internal dimensions. The next step is to open and close the caliper, gently sliding the vernier part until it fits snugly against the measured surface—don't apply too much force, as it may cause damage. The most crucial part of reading is identifying the point where the main scale line and the vernier scale line align. The main scale shows the integer part, while the vernier scale displays the decimal part. Adding them together gives the precise dimension, such as measuring the outer diameter of a bolt or the depth of a hole. After use, clean and store it properly to keep the measuring surfaces smooth. It took several practice sessions to get the hang of it, especially noting that temperature changes can affect results—avoid operating in extremely cold or hot environments.
