Johnson Level & Tool Mfg. 40-6543 User Manual

Page 13

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Original mode

Y-Direction Accuracy Calibration

1. Turn the lock knob to the “OFF’ position.

2. Screw off the Y-direction self-calibration aperture bolt located

behind the handle. Adjust the weight screw inside the instru-
ment core with a flathead screwdriver.

3. If point C is above the point O, rotate the screw-

driver counterclockwise. If point C is under the
point O, rotate the screwdriver clockwise.

Note: After the unit is checked in one direction, check the other
direction, until the accuracy of the two directions are both within
specification.
Note: If adjusting screws bottom out and unit is still not calibrated in
X or Y axis, unit will need to be sent in for servicing.
Note: Install the self-calibration aperture screw and rubber stopper
after finishing the accuracy self-check and calibration.

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