Vernier caliper least count digital and manual

This technical bulletin addresses the accuracy and calibration of digital, dial, and vernier calipers. The technical basis for this document is the American national standard (ANSI standard) entitled ASME B89.1.14-2018. This technical bulletin summarizes the most important technical issues; however, the ASME standard should be consulted for further information.

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Reading vernier caliper takes more steps than main scale and the vernier scale). Advertisements Your eyes have to be careful when deciding which one the aligned line is. This is the core thing when you read vernier caliper. It requires good eyesight. If you fail to do that, your measurement will be incorrect. In many cases, you can see our list of If you see on the market, the inch reading models provide a resolution down to 0.001″ or 1/128″ ( In this post, we will be discussing how to read vernier caliper that has those kinds of graduation systems. Whether it is in mm (millimeter) or inch, we will be covering it here. Through this post, you’ll know the graduation variation systems that we mean. Before you go further, you have to learn first what the general formula is and how to read the zero error. The General Formula Basically, the thumb rule in reading vernier caliper is similar both for the inch and mm scale. Final Result = Main Scale Reading + Vernier Scale Reading – Zero Error main scale reading is the amount of the vernier scale divisions that are completely passed by the vernier scale’s zero line. While the vernier scale reading is the amount of vernier scale divisions from 0 to the aligned line. You could see the following picture. The first (left) yellowed line shows how many divisions passed by the vernier 0 marking. In this case, it has passed 42 divisions. While the second (right) yellowed line shows the aligned line. The main scale is the red one; the vernie...