Nikon NPL-632, Instruction Manual

Page: 37 / 206

Field Station NPL-632 Instruction Manual 23
Preparation 2
3. Replace and tighten the adjustment screw.
Changing the direction of the prism
The prism mounted on the tribrach adapter can be rotated to face in any direction.
To change the direction of the prism:
1. Release the rotation clamp. To do this, turn
the clamp lever counterclockwise.
2. Turn the upper plate of the tribrach adapter
until the prism is facing in the required
direction.
3. Fasten the rotation clamp. To do this, turn the
clamp lever clockwise.
Setting the prism constant
1. Attach the prism to the single prism holder or triple prism holder.
B
Tip - To use a triple prism holder as a single prism holder, attach the prism to the center thread
of the prism holder.
2. Set the prism constant. To do this, hold down
[MSR1]
or
[MSR2]
for one second. For more
information, see Measurement settings, page 53 .
Note – The prism constant of a Nikon prism is always
0, whether it is attached to a single prism holder or a
triple prism holder.
If your prism constant is not 0mm, then directly enter the prism constant value
in the
Const field. For example, if your prism constant is 30mm, enter
30mm
in the Const field on the instrument.
Clamp
Clamp lever
Unclamp