Product Manual

Accuracy Self-Check - Horizontal Laser (40-6693, 40-6695, 40-6678)

1. Set the instrument on a level surface such as a flat head tripod

located between two walls (marked 1 & 2) approximately 25 feet apart.

(See fig. 1). The laser should be as close as possible to wall 1.

2. Point the instrument directly at wall 1. Turn the laser on and mark the

beam as point A.

3. Turn the instrument 180 degrees so that the laser is pointed directly at

wall 2. Mark the beam on wall 2 as point B.

4. Move the instrument and the tripod so the laser is positioned as close

as possible to wall 2 (see fig. 2). Level the tripod and position the

instrument on the tripod facing wall 2. Turn the laser on and mark

the beam as point C.

5. Turn the laser off and rotate the laser 180 degrees so that it is

facing directly to wall 1.

6. Turn on the laser and mark the beam

as point D.

7. Measure the vertical distance between

points A & D.

8. Measure the vertical distance between

points B & C.

9. If the differences in distance between

points A & D and points B & C is less

than 1/8" at 25', your instrument is

within its tolerance.

10. If it is greater than 1/8" at 25', your

unit will need to be recalibrated.

Wall 1

Wall 2

Fig 1

Fig 2

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