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GLL 3-50 +вкладка L-BOXX
Руководство по эксплуатации Страница: 18

Bosch GLL 3-50 +вкладка L-BOXX [18/254] Checking plumb accuracy

18 | English

– Mark the centre of the vertical laser line on the floor of the

door opening (pointⅠ), 5m away on the other side of the

door opening (pointⅡ) and on the upper edge of the door

opening (pointⅢ).

2 m

– Rotate the measuring tool 180° and position it on the

other side of the door opening, directly behind pointⅡ.

Allow the measuring tool to level in and align the vertical

laser line in such a way that its centre passes through

pointsⅠ andⅡ exactly.

– Mark the centre of the laser line on the upper edge of the

door opening as pointⅣ.

– The discrepancy d between the two marked pointsⅢ and

Ⅳ reveals the actual vertical deviation of the measuring

tool.

– Measure the height of the door opening.

You can calculate the maximum permitted deviation as fol-

lows:

Doubled height of the door opening×0.3mm/m

Example: At a door opening height of 2m, the maximum de-

viation amounts to

2×2m×±0.3mm/m=±1.2mm. The pointsⅢ and Ⅳ

must therefore be no further than 1.2mm from each other.

Checking Plumb Accuracy

For this check, you will need a clear measuring space on firm

ground with a distance of approx. 5m between the floor and

the ceiling.

– Mount the measuring tool onto the rotating platform(16)

and place it on the floor. Select vertical mode with auto-

matic levelling and allow the measuring tool to level in.

5 m

– Mark the centre of the top point of intersection of the

laser lines on the ceiling (pointⅠ). Also mark the centre of

the plumb point on the floor (pointⅡ).

180°

– Turn the measuring tool by 180°. Position it so that the

centre of the plumb point falls onto the marked pointⅡ.

Allow the measuring tool to level in. Mark the centre of the

top point of intersection of the laser lines (pointⅢ).

– The discrepancy d between the two marked pointsⅠ and

Ⅲ on the ceiling reveals the actual deviation of the meas-

uring tool from the vertical plane.

You can calculate the maximum permitted deviation as fol-

lows:

Doubled distance between floor and ceiling×0.6mm/m

Example: At a floor-to-ceiling distance of 5m, the maximum

deviation amounts to

2×5m×±0.6mm/m=±6mm. The pointsⅠ and Ⅲ must

therefore be no further than 6mm from each other.

Working Advice

u Only the centre of the laser point or laser line must be

used for marking. The size of the laser point/the width of

the laser line changes depending on the distance.

Working with the Laser Target Plate

The laser target plate(19) improves visibility of the laser

beam in unfavourable conditions and at greater distances.

The reflective surface of the laser target plate(19) improves

visibility of the laser line. The transparent surface enables

the laser line to be seen from behind the laser target plate.

Working with the Tripod (Accessory)

A tripod offers a stable, height-adjustable support surface

for measuring. Place the measuring tool with the 1/4" tripod

mount (6) on the thread of the tripod (21) or a conventional

camera tripod. Use the 5/8" tripod mount(9) to secure the

measuring tool on a conventional building tripod. Tighten the

measuring tool using the locking screw of the tripod.

Roughly align the tripod before switching on the measuring

tool.

Working with the laser receiver (accessory)

(see figureE)

Use the laser receiver (23) to improve detection of the laser

lines in adverse lighting conditions (bright environment, dir-

ect sunlight) and over greater distances. When working with

1 609 92A 7S5 | (17.05.2022) Bosch Power Tools

Bosch GLL 3-50 +вкладка L-BOXX [18/254] Checking plumb accuracy

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