Locate the zero (0) on the right side or
vernier side of the Reel Diameter Tape™.
Read the measurement just above the
zero.
Each large numbered line is 1 inch.
Each small numbered line is .1 inches.
Each small line without numbers
is .025 inches.
The illustration at the left would then
be 4.275.
To read the vernier, find the two lines
that best line up and read the number on
the right side or the vernier side
This would be .014 inches.
Add together to get your final
measurement
(4.275 + .014 = 4.289).
You should repeat each measurement
you make at least once and until you
duplicate the measurement with in .003
inches.
The smaller the number is on any
given measurement, the more accurate it
is.
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General