Manual Bosch RC 1 (page 25 of 351) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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English | 25

Bosch Power Tools 1 609 92A 0D9 | (24.3.14)

Pressing the line operation button again takes you back to

line operation with the smallest aperture angle.

Note: Due to inertia, it is possible for the laser to slightly move

beyond the end point of the laser line.

Rotating the Laser Line/Laser Dot or the Ro-

tational Plane (see figure A)

When the measuring tool is in the horizontal position, the la-

ser line (in line operation) or the laser dot (in point operation)

can be positioned within the rotational plane of the laser. Ro-

tation is possible by 360°.

For this, manually turn the rotation head 10 to the desired po-

sition or use the remote control: Press button 28 to rotate in

clockwise direction, and button 29 on the remote control to

rotate in anticlockwise direction. In rotational operation,

pressing the buttons has no effect.

When the measuring tool is in the vertical position, it is pos-

sible to rotate the laser point, laser line or rotational plane

around the vertical axis. Rotating is possible only within the

self-levelling range (5° leftwards or rightwards) and only with

the remote control.

Press button 28 on the remote control to rotate in clockwise

direction, and button 29 on the remote control to rotate in an-

ticlockwise direction.

Automatic Levelling of the Rotational Laser Level

Overview

After switching on, the measuring tool automatically detects

the horizontal or vertical position. To change between the

horizontal and vertical position, switch the measuring tool off,

reposition 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 in is no long-

er possible. In this case, the rotor is stopped, the laser flashes

and levelling indicator 3 continuously lights up red. Reposi-

tion the measuring tool and wait for it to re-level. Without re-

positioning, the laser is automatically switched off after

2 minutes and the measuring tool after 2 hours.

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 measure-

ments, the rotor stops during the levelling process, the laser

flashes and the levelling indicator 3 flashes green.

Shock-warning Function

The measuring tool has a shock-warning function; after posi-

tion 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.

–To switch on the shock-warning function, press the shock-

warning button 2. The shock-warning indicator 1 continu-

ously lights up green, and the shock-warning function is ac-

tivated after 30 seconds.

When the levelling-accuracy range is exceeded after a posi-

tion change of the measuring tool or when heavy ground vi-

brations are detected, the shock-warning function is actuat-

ed: The rotation is stopped, the laser flashes, the levelling

indicator 3 goes out and the shock-warning indicator 1 flash-

es red. The current operating mode is stored.

– After the shock warning has actuated, press the shock-

warning button 2 on the measuring tool or the shock-warn-

ing reset button 27 on the remote control. 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, after the shock-warning function has actuated, the

function is not restarted by pressing button 2 on the measur-

ing tool or the shock-warning reset button 27 on the remote

control, 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 2 once, or, when the shock warning is actu-

ated (shock-warning indicator 1 flashing red) press it

twice. When the shock-warning function is shut off, the

shock-warning indicator 1 goes out.

The shock-warning function cannot be switched on or off with

the remote control; it can only be restarted after having actu-

ated.

Levelling Accuracy of the Rotational Laser Level

Influences on Accuracy

The ambient temperature has the greatest influence. Espe-

cially temperature differences occurring from the ground up-

ward can divert the laser beam.

The deviations play a role in excess of approx. 20 m measur-

ing distance and can easily reach two to four times the devia-

tion 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 pos-

sible, also set up the measuring tool in the centre of the work

area.

Accuracy Check of the Measuring Tool

Apart from exterior influences, device-specific influences

(such as heavy impact or falling down) can lead to deviations.

Therefore, check the accuracy of the measuring tool each

time before starting your work.

For the accuracy check, an unobstructed measuring distance

of 20 m on firm ground between two walls A and B is required.

With the measuring tool in the horizontal position, a transit

measurement is to be carried out across both axes X and Y

(both positive and negative) (altogether 4 complete measure-

ments).

– Mount the measuring tool in the horizontal position onto a

tripod 37 (accessory) or place it on a firm and level surface

near wall A. Switch the measuring tool on.

OBJ_BUCH-757-008.book Page 25 Monday, March 24, 2014 11:19 AM

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Bosch RC 1 Manual

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