METRICA 61400M Manual Del Usuario página 13

range of +/- 4°. The leveling is finished as soon as the laser
beams do not move any more.
If automatic leveling is not possible - e.g. because the surface
where the measuring tool is placed deviates by more than 4°
from the horizontal plane - the laser lines begin to flash rapidly
Set the measuring tool in a plane position and wait until the self-
leveling is performed. As soon as the measuring tool is within
the self-leveling range of +/- 4° , all laser beams light up con-
tinuously.
Operation without Automatic leveling
To operate without automatic leveling, slide the On/Off switch
to the . When automatic levelling is switched off, indicator 6
lights up red and for first 30s laser beams flash slowly. When
automatic levelling is switched off, you can hold the measuring
tool freely in your hand or place it on an inclined surface.
Laser lines may not be perpendicular to each other
LEVELLING ACCURACY
Influences on Accuracy
The greatest influence derives from the ambient temperature.
Especially temperature differences occurring from the ground to
the top can deflect the laser beam.
Since the greatest difference in temperature levels is close to
the ground, the measuring tool should always be mounted on a
tripod when measuring distances exceeding 20m, and if possi-
ble, also place the measuring tool in the centre of the work area.
In addition to external influences, device specific influences
(such as heavy impact or falling down) can cause a deviation,
therefore, check the accuracy of measuring tool each time be-
fore starting a job.
Firstly, check the leveling accuracy of the horizontal laser line
and then the leveling accuracy of the vertical laser lines.
CHECKING THE HORIZONTAL LEVELING
ACCURACY OF THE LATERAL AXES
For this check, a free measuring distance of 5 meters on a firm
surface between two walls A and B is required.
Mount the measuring tool onto a tripod, or place it on a firm and
plane surface close to wall A.
Switch on the measuring tool to operate with automatic levelling
function activated. Select the operation mode that generates a
horizontal laser plane as well as a vertical laser plane in front of
the measuring instrument.
Direct the laser against the close wall A and allow the measuring
tool to level in and to perform the planes I. Mark with I the centre
of the point where the laser lines cross each other on wall A
Turn the measuring tool by 180°, allow it to level in and to per-
form the planes. Mark with
on the opposite wall B
Without rotating the measuring tool, place it close to wall B.
Switch the measuring tool on and allow it to level in.
II the cross point of the laser planes
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