Spectra LL100-2 User Manual download pdf (Page 8)

6. Set the grade rod on the slope axis direction hub to adjust the laser’s elevation without changing the height

of the receiver on the grade rod (C).

7. Press the up and down arrow buttons until you get an on-grade reading on the receiver.

8. Recheck the laser’s elevation in automatic self-leveling axis using the HI in step 3 (B).

If the HI has been changed, rotate the laser on the tripod until you get an on-grade reading again. Make sure,

you DON’T change the height of the receiver on the grade rod.

CALIBRATION

Checking Calibration of the Y- and X-Axes

1. Set up the laser 30 m (100 ft) from a wall and allow it to level.

2. Raise/lower the receiver until you get an on-grade reading for the

+Y axis. Using the on-grade marking notch as a reference, make a

mark on the wall.

Note: For increased precision, use the ﬁ ne-sensitivity setting

(1.5 mm/1/16 in.) on the receiver.

3. Rotate the laser 180° (-Y axis toward the wall) and allow the laser

to re-level.

4. Raise/lower the receiver until you get an on-grade reading for the

–Y axis. Using the on-grade marking notch as a reference, make a

mark on the wall.

5. Measure the difference between the two marks. If they differ more than

6 mm at 30 m (1/4 inch at 100 feet), the laser needs calibrating.

6. After checking the Y-axis, rotate the laser 90°. Repeat the above

starting with the + X axis facing the wall.

Note: If calibration is required, please, refer to the

calibration instructions on our Trimble website

www.trimble.com/support.shtml

PROTECTING THE UNIT

Do not expose the unit to extreme temperatures or temperature changes (do not leave inside the car).

The unit is very robust and can resist damage if dropped even from tripod height. Before continuing your work,

always check the leveling accuracy. See Checking Calibration section.

The laser is water protected and can be used indoors and outdoors.

CLEANING AND MAINTENANCE

Dirt and water on the Rotor/Beam Exit (Component 11) will inﬂ uence beam quality and operating range

considerably.

Remove dirt on the housing with a lint-free, warm, wet and smooth cloth. Do not use harsh cleansers or

solvents.

Allow the unit to air dry after cleaning it.

30 m (100 ft)

Y+

30 m (100 ft)

-Y

30 m (100 ft)

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Spectra LL100-2 User Manual Page 8