Measuring Tips for Digital Electronic Calipers

Do you know how to use a digital electronic calipers correctly? It has an electronic readout rather than a vernier scale. In general, an digital electronic caliper has three buttons, an on/off button, an English/Metric button, and a Zero button. The tips of using an electronic caliper are as followings:
1. Turn the caliper on.
2. Select English (inches) or Metric (millimeters) reading--almost always in physics you would choose metric.
3. Close the caliper jaws and press the Zero button.
4. Measure the desired object and read the digital readout.