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THE DIGITAL CALIPER - 2

V. Ryan © 2004 - 2009

 

MEASURING INTERNAL DISTANCES

   

The example below shows a digital caliper being used to measure the internal diameter of a piece of copper tube. The internal jaws are adjusted carefully until they touch the internal ‘sides’. The locking screw is tightened so that an accurate measurement can be made even if the jaws are ‘knocked’ against the sides as the jaws are removed from the hole. The measurement is shown on the LCD display.

   

 

 

 

MEASURING DEPTHS

   

Measuring the depth of a hole can be very difficult. However, using a digital caliper makes this task easy. The base of the vernier caliper rests on the top of the hole and the depth measuring blade is adjusted until it touches the bottom of the hole. The locking screw is tightened and the measurement can be read on the LCD display.

   

 
 
QUESTIONS:
1. Describe the advantages and disadvantages of a digital caliper as compared with a manual type of caliper ?
2. What could happen if the locking screw is not used when measuring a distance with the digital caliper ?
3. Name another type of precise measuring instrument that engineers tend to use.
   

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