Trimble Laser GL762

Adjusting the calibration at the laser

Press both axes alignment buttons to clear any stored rake angle

Position the receiver at the midpoint of the two marks on the wall

Add/subtract grade in the appropriate axis using the up/down buttons

Store the new calibration value and zero out the grade display using the hidden button sequence

Rotate the laser 180° back to the original face and ensure axis is less than 5/16 in. (8 mm) from the midpoint line

Is additional adjustment required?

Repeat Step 1 through Step 3 if additional adjustment is required

After adjusting the 2 axis, rotate the laser 90° and repeat the procedure starting with the +1 axis facing the wall

Set up the laser 90 m (300 ft) from a wall

Set the grade to 0.000% in both axes

Mark the wall using the on-grade marking notch for the +  axis

Rotate the laser 180° (–  axis toward the wall) and allow the laser to re-level

Mark the wall using the on-grade marking notch for the –  axis

Measure the difference between the two marks

Is the difference between the two marks more than 5/16 in. (8 mm)?

Use the fine-sensitivity setting (1/16 in / 1.5 mm) on the receiver for increased precision

External Optical Components Cleaning

Ensure all external optical components are cleaned using a good-quality glass cleaner and a soft cloth

Blow off any loose debris before cleaning surfaces to prevent scratching

Laser Outer Surface and Battery Housing Cleaning

Wipe off dust or dirt from the laser's outer surface with a moist, clean cloth

Clean inside the battery housing with a moist, clean cloth

Clean all corroded battery contacts