Manual Bosch GLM 250 VF Professional (page 23 of 319) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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English | 23

Bosch Power Tools 1 609 92A 0KT | (23.4.14)

To delete the currently displayed measured-value list entry,

briefly press button 16. To delete the complete measured-

value list, press and hold the button for the measured-value

list 15 and at the same time briefly press button 16.

Deleting Measured Values

Briefly pressing button 16 deletes the last individual measur-

ing value determined in all measuring functions. Briefly press-

ing the button repeatedly deletes the individual measured val-

ues in reverse order.

In wall surface measurement mode, briefly pressing button

16 the first time deletes the last individually measured value;

pressing the button a second time deletes all lengths B

, and

pressing the button a third time deletes all room heights A.

Adding Measured Values

To add measured values, firstly carry out any measurement or

select an entry from the measured-value list. Then press the

plus button 6. For confirmation, “+” appears on the display.

Then carry out a second measurement or select another entry

from the measured-value list.

To call up the sum of both measure-

ments, press the result button 5. The

calculation is indicated in the mea-

sured-value lines a, and the sum in

the result line c.

After calculation of the sum, further

measured values or measured-value

list entries can be added to this result when pressing the plus

button 6 prior to each measurement. Pressing the result but-

ton 5 ends the addition.

Notes on the addition:

– Mixed length, area and volume values cannot be added to-

gether. For example, when a length and area value are add-

ed, “ERROR” briefly appears on the display after pressing

the result button 5. Afterwards, the measuring tool switch-

es back to the last active measuring mode.

– For each calculation, the result of one measurement is

added (e.g. the volume value); for continuous measure-

ments, this would be the displayed measured value in re-

sult line c. The addition of individual measured values from

the measured-value lines a is not possible.

– For time-delayed length measurements and when in mark-

out mode, additions are not possible; when changing to

these modes, begun additions are interrupted.

Subtracting Measured Values

To subtract measuring values, press

minus button 12; for confirmation,

“–” is indicated on the display. The

further procedure is analog to “Add-

ing Measured Values”.

Working Advice

General Information

The reception lens 26 and the laser beam outlet 27 must not

be covered when taking a measurement.

The measuring tool must not be moved while taking a mea-

surement (except for continuous measurements, minimum/

maximum measurements and when in mark-out mode).

Therefore, place the measuring tool, as far as this is possible,

against or on a firm stop or supporting surface.

Influence Effects on the Measuring Range

The measuring range depends upon the light conditions and

the reflection properties of the target surface. For improved

visibility of the laser beam when working outdoors and when

the sunlight is intense, use the laser viewing glasses 31

(accessory) and the laser target plate 32 (accessory), or

shade off the target surface.

Influence Effects on the Measuring Result

Due to physical effects, faulty measurements cannot be ex-

cluded when measuring on different surfaces. Included here

are:

– transparent surfaces (e.g., glass, water),

– reflecting surfaces (e.g., polished metal, glass),

– porous surfaces (e.g. insulation materials),

– structured surfaces (e.g., roughcast, natural stone).

If required, use the laser target plate 32 (accessory) on these

surfaces.

Furthermore, faulty measurements are also possible when

sighting inclined target surfaces.

Also, air layers with varying temperatures or indirectly re-

ceived reflections can affect the measured value.

Measuring with the Positioning Pin

(see figures B, C, F and G)

The positioning pin 18 is suitable for measuring out of corners

(diagonal within a space) or from hard to reach areas, such as

from roller-shutter rails.

Press on the positioning pin latch 1 to fold it in or out, or

change its position.

For measurements starting from outer corners, fold the posi-

tioning pin aside; for measurements from the rear edge of the

positioning pin on, fold it out to the rear.

For measurements with the positioning pin, adjust the refer-

ence plane accordingly by pressing button 8 (for measure-

ments with the positioning pin aside, set to measuring from

the rear edge of the measuring tool).

Aligning with the Spirit Level

The spirit level 14 allows for simple levelling of the measuring

tool. This allows for easier sighting of target surfaces, espe-

cially over longer distances.

In combination with the laser beam, the spirit level 14 is not

suitable for levelling.

OBJ_BUCH-947-005.book Page 23 Wednesday, April 23, 2014 9:23 AM

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Bosch GLM 250 VF Professional Manual

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