Accuracy Check Of The Measuring Tool - CST/BERGER RL25H Manual Original

RL25HV
After switching on, the measuring tool automatically detects the
horizontal or vertical position. To change between the horizon-
tal and vertical position, switch the measuring tool off, reposi-
tion it and switch on again.
After switching on, the measuring tool checks the horizontal
and vertical position and automatically levels out any uneven-
ness within the self-levelling range of approx. 8 % (5°).
When the measuring tool is inclined by more than 8 % after
switching on or after a position change, levelling is no longer
possible. In this case, the rotor is stopped, the laser flashes, the
automatic levelling indicator 3 and the indicator for single-axis
slope operation 11 alternately flash green.
In this case, switch the measuring tool off, re-align it and switch
the measuring tool on again. Without repositioning, the laser is
automatically switched off after 2 min and the measuring tool
after 30 min.
When the measuring tool is levelled in, it continuously checks
the horizontal and vertical position. Automatic re-levelling takes
place after position changes. To avoid faulty measurements,
the rotor stops during the levelling process, the laser flashes
and the levelling indicator 3 rapidly flashes green.
Single-axis Slope Operation
When the measuring tool is in horizontal position, the X-axis is
automatically levelled in while in single-axis slope operation,
the Y-axis not. With the shock-warning function switched on,
only the levelling of the X-axis is monitored.
The rotational plane can be turned around the X-axis in a range
of ±8 %. The measuring tool can be set up inclined alongside the
Y-axis.
Position changes of the measuring tool alongside the
Y-axis are not detected in single-axis slope operation.
With the gradient plate (accessory), the measuring tool can be
inclined at an exact angle alongside the Y-axis when in the hori-
zontal position.
To switch to single-axis slope operation, press the button for
single-axis slope operation 12. This is confirmed by slow flash-
ing of the indicator for single-axis slope operation 11. With the
shock-warning function switched on, only the X-axis is moni-
tored.
To switch the automatic levelling on again for both axes, press
button 12 once more. The indicator for single-axis slope opera-
tion 11 lights up continuously.
To turn the rotational plane around the X-axis, press the direc-
tion up 10 or down button 9. The turning direction corresponds
with the arrow direction on buttons 10 and 9.
Shock-warning Function
The measuring tool has a shock-warning function; after position
changes or shock to the measuring tool, or in case of ground
vibrations, it keeps the measuring tool from levelling in at
changed heights, and thus prevents vertical errors.
After switching on the measuring tool, the shock-warning func-
tion is always switched on; the shock-warning indicator 7 lights
up green. The shock warning is activated approx. 30 s
after switching on the measuring tool or the shock-warning
function.
30 | English
When the levelling-accuracy range is exceeded after a position
change of the measuring tool or when heavy ground vibrations
are detected, the shock-warning function is actuated: The rota-
tion is stopped, the laser flashes and the shock-warning indica-
tor 7 flashes red. The current operating mode is stored.
After the shock-warning function has actuated, press the shock-
warning button 8. The shock-warning function is restarted and
the measuring tool starts the levelling. As soon as the measuring
tool is levelled in (levelling indicator 3 continuously lights up
green), it starts in the stored operating mode. Now, check the
height of the laser beam with a reference point and correct the
height, if required.
When the function is not restarted by pressing button 8 after the
shock-warning function has actuated, the laser is automatically
switched off after 2 minutes and the measuring tool after 2 hours.
To switch off the shock-warning function, press shock-warning
button 8 once, or, when the shock warning is actuated (shock-
warning indicator 7 flashing red) press it twice. When the shock-
warning function is shut off, the shock-warning indicator 7 goes
out.
To switch on the shock-warning function, press the shock-warn-
ing button 8. The shock-warning indicator 7 lights up green, and
the shock-warning function is activated after 30 seconds.

Accuracy Check of the Measuring Tool

Influences on Accuracy
The ambient temperature has the greatest influence. Especially
temperature differences occurring from the ground upward can
divert the laser beam.
The deviations play a role in excess of approx. 20 m measuring
distance and can easily reach two to four times the deviation at
100 m.
Because the largest difference in temperature layers is close to
the ground, the measuring tool should always be mounted on a
tripod when measuring distances exceeding 20 m. If possible,
also set up the measuring tool in the centre of the work area.
Checking the Levelling Accuracy
Apart from exterior influences, device-specific influences (such
as heavy impact or falling down) can lead to deviations. There-
fore, check the accuracy of the measuring tool each time before
starting your work.
A free measuring distance of 20 m on a firm surface between
two walls A and B is required for the check. A reversal measure-
ment must be carried out over both axes X and Y (each positive
and negative; 4 complete measurements).
– Mount the measuring tool in the horizontal position onto a
tripod 25 (accessory) or place it on a firm and level surface
near wall A. Switch the measuring tool on.
A
20 m
2 610 A15 294 • 7.5.12
B