Nikon K Series, Instruction Manual

Page: 165 / 198

Nikon N Series/K Series Total Station Instruction Manual 147
Checking and Adjustment 6
4. If the image is not in the same
position, adjust the optical
plummet:
a. Use the supplied hexagonal
wrench to turn the adjustment
screws until the image of the
X is in Position P. Position P
is the center point of the line
connecting the X and the
center of the reticle mark
.
b. Repeat from Step 2 .
Zero Point Errors of Vertical Scale and Horizontal Angle Corrections
Checking
1. Set up the instrument on the tripod.
2. Follow the leveling procedures described in Leveling, page 15 .
3. Flip the telescope to the Face-1 position.
4. Sight a target that is within 45° of the horizontal plane.
5. Read the vertical angle from the VA1 field in the Basic Measurement Screen
(BMS).
6. Rotate the instrument 180° and flip the telescope to the Face-2 position.
7. Read the vertical angle from the VA2 field.
8. Add the two vertical angles together, VA1 + VA2.
–
No adjustment is required if the zero reference for vertical angles (VA
zero setting) is set to Zenith, and VA1 + VA2 equals 360°.
–
No adjustment is required if the zero reference for vertical angles (VA
zero setting) is set to Horizon, and VA1 + VA2 is either 180° or 540°.
–
An adjustment is required if VA1 + VA2 is not one of the values listed
above.
Note – The difference between the vertical angle reading the relevant angle (either
360° for Zenith, or 180° or 540° for Horizon) is called the altitude constant .