Azbil KFDB, User Manual

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(3) Linearity Adjustment
(a) For linearity adjustment, use the 50 % point of the scale.
(b) If an error greater than 1 %FS is found, vary the travel link length by turning the
adjustment knob. If the error is in the positive side of the scale, shorten the travel link
(turn the knob counterclockwise as viewed from the instrument bottom).
(c) The zero point also will vary as the travel link length is varied. Loosen the ZERO ADJ
screw, set the pointer to the zero point on the scale, and tighten the screw.
(d) Check again the zero and span by repeating the above procedure.