GeoMax Zeta125 Manuel De L'utilisateur page 49

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Responsibilities and operation
The user can calibrate the instrument. Carry out the calibration attentively and
carefully. The user takes full responsibility for failures at measurements and/or
consequential damages through wrong calibration.
If you feel unsure about doing the calibration, contact your authorised dealer
or GeoMax.
Test to see if a horizontal calibration is required
Step Description
1. Define a horizontal 60 m distance between a reference point and
target point.

Defining a horizontal distance using an optical level: In a
distance of 30 m from the level, define a reference point by a
yardstick. Turn the level by 180 degrees. Define a target point
in a distance of 30 m from the level.
2. Place the laser at 0.000% at the reference point.
3. Measure the height difference between the reference and the target
point. Write down the value.
4. Move the laser beam to the target point.
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