User's Manual

6 Checking and Adjustment

136 Total Station Nivo Series Instruction Manual

Adjusting the Electronic Level

Adjustment of the electronic level is done by Zero point errors of vertical scale and

horizontal angle corrections. For detailed instruction, please see

page 137.

Checking and Adjusting the Circular Level

Once you have checked and adjusted the electronic

level, check the circular level.

If the bubble is not in the center of the level, use the

adjusting pin to rotate the three adjustment screws

of either circular level on the instrument main body

or tribrach until the bubble is centered.

Checking and Adjusting the Optical/Laser Plummet

The optical axis of the plummet must be aligned with the vertical axis of the

instrument.

To check and adjust the optical/laser plummet:

1. Place the instrument on the tripod. You do not have to level the instrument.

2. Place a thick sheet of paper marked with an X on

the ground below the instrument.

While you are looking through the optical

plummet, adjust the leveling screws until the

image of the X is in the center of the reticle

mark .

For laser plummet, adjust the laser pointer to the

3. Rotate the alidade 180°.

If the marked image is in the same position in the

center of the reticle mark, no adjustment is

required

For laser plummet, if the laser pointer is on the X,

no adjustment is required.