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7. ACCURACY CHECK
IMPORTANT! Laser beam widens over distance; therefore,
ALWAYS take measurements at the center of the beam.
However, for the sole purpose of accuracy check, since
the distance between the instrument and the target remains
constant, you may use the lower edge of the beam as reference.
IMPORTANT! Tripod needs to stand on solid ground.
WARNING! Ground shake or impact to the mounted
instrument may cause the beam position to fluctuate. Allow
time for the laser beam to self-level and ensure your vertical
height is maintained prior to continuing.
1. Position the instrument and tripod at no less than
15 m from the opposite wall in a dimly lit room.
2. Draw an accuracy check worksheet as shown below.
3. Position the worksheet on the opposite wall of the room
so that the laser beam can be clearly marked.
X - 0º
*Displayed markings are exaggerated for illustration
purposes.
IMPORTANT! Do not tamper with the tripod or modify the
position of the worksheet during the accuracy check process.
4. Power-ON the instrument: Rotate the Pendulum Lock/
Unlock Switch
until the beam is self-levelled on the horizontal plane.
min. 50' (15 m)
Worksheet
X-Axis
X - 180º
3
to the UNLOCKED Position and wait
Y - 0º
36
Y-Axis
Y - 180º
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