TB 9-6685-316-50
(3) Deviations varying non-linearly over the range of the TI are corrected by
repositioning the arc-loc movement. Remove the protective back or case, loosen the
three locking screws, and rotate the arc-loc movement as required. If the indications are
first increasingly plus and then decreasingly plus, rotate the arc-loc movement in the
direction "A". If the indications are first increasingly minus and then decreasingly
minus, rotate the arc-loc movement in direction "B". Tighten the locking screws.
(4) Repeat (1), (2), or (3) as necessary to obtain indications within tolerance.
a. Release pressure, remove all weights, and reinstall in carrying case.
b. In accordance with TM 38-750, annotate and affix DA Label 80 (US Army
Calibration System). When the 11 cannot be a(adjusted within tolerance, annotate; and
affix DA Form 2417 (Unserviceable or Limited Use) tag.