Bosch GAM 270 MFL Professional Originalbetriebsanleitung Seite 23

If the target value is reached, the arrows for the alignment aids (h)/(i) go out
and, provided the audio signal is switched on, a continuous audio signal will
be played.
Contact-Free Measuring/Transferring of Grades
With the laser, it is possible to measure and transfer grades contact-free,
even over greater distances.
Do not direct the laser beam at persons or animals and do not stare
u
into the laser beam yourself (even from a distance).
Always use the centre of the laser point for marking. The size of the
u
laser point changes with the distance.
To measure grades, align the measuring tool so that the laser beam runs
alongside the surface to be measured. To transfer grades, align the measur-
ing tool so that the desired grade is displayed as the measured value (n),
and mark the grade on the target surface using the laser point.
Note: When transferring grades via the laser, take into consideration that
the laser comes out 30 mm above the bottom edge of the measuring tool.
Accuracy Check and Calibration of the Measuring Tool
Check the accuracy of grade measurement
Check the accuracy of the measuring tool prior to critical measurements,
after intense variations in temperature as well as after heavy impact.
Before measuring grades < 45°, the accuracy check should take place on a
level and roughly horizontal surface; before measuring grades > 45°, on a
level and roughly vertical surface.
Switch on the measuring tool and place it on the horizontal/vertical surface.
Select the measuring unit ° (see "Changing the Measuring Unit (see fig-
ure B)", page 22).
Wait for 10 s and note down the measured value (n) for the grade measure-
ment.
Rotate the measuring tool by 180° around its vertical axis. Wait for another
10 s and note down the second measured value (n) for the grade measure-
ment.
Calibrate the measuring tool only when the difference between both
u
measured values is greater than 0.1°.
Calibrate the measuring tool in the position (vertical or horizontal), in which
the difference of the measured values has been determined.
The calibration can be performed only with the bottom side.
Calibration of Horizontal Surfaces for Grade Measurement (see figure I)
The surface onto which you place the measuring tool must not deviate from
the horizontal surface by more than 5°. If the deviation is greater, the calib-
ration process is discontinued with the indicator ‑‑‑.
➀ Switch on the measuring tool and position it on the horizontal sur-
face so that the spirit level for horizontal alignment (9) faces up-
wards and the display (7) faces you. Wait 10 s.
➁ Then press and hold the calibration button UnitsCal (20) for ap-
prox. 2 s until CAL1 appears briefly on the display. Then the meas-
ured value (n) will flash on the display.
Turn the measuring tool 180° around the vertical axis so that the
➂
spirit level for horizontal alignment (9) still faces upwards but the
display (7) is facing away from you. Wait 10 s.
Then press the calibration button UnitsCal (20) again. CAL2 will be
➃
shown briefly on the display. Then the measured value (n) (no
longer flashing) will appear on the display. The measuring tool has
now been recalibrated for this supporting surface.
Note: If the measuring tool is not rotated around the axis described in step
➂, calibration may not be completed.
Calibration of Vertical Surfaces for Grade Measurement (see figure J)
The surface onto which you place the measuring tool must not deviate from
the vertical surface by more than 5°. If the deviation is greater, the calibra-
tion process is discontinued with the indicator ‑‑‑.
➀ Switch on the measuring tool and position it on the vertical surface
so that the spirit level for vertical alignment (10) faces upwards and
the display (7) faces you. Wait 10 s.
➁ Then press the calibration button UnitsCal (20) for approx. 2 s un-
til CAL1 appears briefly on the display. Then the measured
value (n) will flash on the display.
➂ Turn the measuring tool 180° around the horizontal axis so that the
spirit level for vertical alignment (10) faces downwards and the dis-
play (7) is facing away from you. Wait 10 s.
➃ Then press the calibration button UnitsCal (20) again. CAL2 will be
shown briefly on the display. Then the measured value (n) (no
longer flashing) will appear on the display. The measuring tool has
now been recalibrated for this supporting surface.
Note: If the measuring tool is not rotated around the axis described in step
➂, calibration may not be completed.
Bosch Power Tools
English | 23
1 609 92A 58L | (22.11.2019)