1. Measuring the difference in size between objects.
Let say yo


At this point, push the zero button. The digital display will now shows 0.00 mm.
Now you can measure each of the screws. The display will show the difference of the screw length compare to the dimension you need which is 6mm. Since you need the screw with the same length or shorter, you can only take screws with the display show zero or minus number reading.


The display with plus number reading means the screw is longer than 6 mm. It is also easier to identify how much longer or shorter the screw by using this method.
2. Measuring the center-to-center (pitch) of 2 or more equal size holes.

It will be easier to measure the pitch of the 2 or more equal size holes using a digital caliper. Make sure the holes are the same size by measuring the holes using the internal jaws of the digital caliper. Let say all the holes diameter are measured 6.96 mm.

While measuring one of the hole diameter, when the digital display shows 6.96 mm, hold your thumb lightly, then push the "zero" button. The display will show 0.00 mm.

Then you can use the internal jaws of the digital caliper again to measure the pitch of the 2 holes as shown on the picture. The digital display will show the pitch or center-to-center distance between the 2 holes.
3. Measuring the depth of a small hole.
To measure hole depth, we need to use a digital caliper with probe which attached to the movable head. What if the hole diameter is smaller than the probe? You can not fit in the probe into the hole to measure the depth. What you can do is to find a pin which can fit into the hole to the bottom, and the pin is longer than the hole depth. The pin should not be to loose when fitted into the hole or you may not get accurate measurement. Fit in the pin until the bottom of the hole.


Measure the length of the outside portion of the pin. At that point, set the digital caliper display to zero.


