From the top of the scale, rotate, rotation, 5 casing around the axis scale is to be noticed a tick by tick (tick, not including the zero). 1. the kaenklang casing, rotate, scale, 5 cycles show that measure passed 5 * 0.50 mm equal to 2.50 mm. 2. read the scale tick collar and the collar rotate, scale, rotate, Read up 0.30 mm 3. combine the values read from the 1 and 2 has the value read is (5 * 0.50 + 0.30) equal to 2.80 mm and save the value that measures 2.5 + 0.30 = 2.800 mm.
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