Instruction manual

36
8.1 Checking /Adjusting the Plate Level
Adjustment is required if the axis of the plate level is not perpendicular to the
vertical axis.
●
Check
ing
1
Place the plate level parallel to a line running through the centers of
two leveling screws, say, A and B. Use these two leveling screws
only and place the bubble in the center of the plate level.
2
Rotate the instrument 180° or 200g around the vertical axis and
check bubble movement of the plate level. If the bubble has been
displaced, then proceed with the following adjustment.
● Adjustment
1
Adjust the level adjustment capstan screw, with the accessory
adjusting pin and return the bubble towards the center of the plate
level. Correct only one-half of the displacement by this method.
2
Correct the remaining amount of the bubble displacement with the
leveling screws.
3
Rotate the instrument 180° or 200g around the vertical axis once
more and check bubble movement. If the bubble is still displaced,
then repeat the adjustment.
Leveling screw A
Leveling screw B
Plate level
Level adjustment
capstan screw
Half amount of displacement