Bosch GPL5 Service Manual download pdf (Page 8)

-8-

Checking the Horizontal Leveling

Accuracy of the Lateral Axis

A free measuring distance of 78 ft on a firm

surface in front of a wall is required for

the check.

– Mount the measuring tool onto the multi-

purpose attachment or a tripod, or place it

on a firm and level surface at a distance of

78 ft to the wall. Switch the tool on.

– Direct one of the two lateral laser beams,

that run alongside the lateral axis of the

tool, at the wall. Allow the tool to level in.

Mark the center of the laser beam on the

wall (point I).

– Rotate the measuring tool by approx. 180°

without changing its height. Allow it to level

in and mark the center point of the other

lateral laser beam on the wall (point II).

Take care that point II is as vertical as

possible above or below point I.

– The difference d of both marked points I

and II on the wall results in the actual

height deviation of the tool alongside the

lateral axis.

On the measuring distance of 2 x 78 ft = 156

ft, the maximum allowable deviation is:

156 ft x ±0.0036 in/ft = ±9/16 in (.563).

Thus, the difference d between points I and II

may not exceed 9/16 in (max.).

Checking the Horizontal Leveling

Accuracy of the Longitudinal Axis

A free measuring distance of approximately

78 ft on a firm surface between two walls A

and B is required for the check.

– Mount the tool onto the multi-purpose

attachment or a tripod, or place it on a firm

and level surface close to wall A. Switch

the tool on.

– Direct the horizontal laser beam against

the close wall A and allow the measuring

tool to level in. Mark the center of the laser

beam on the wall (point I).

– Turn the tool around by 180°, allow it to

level in and mark the center point of the

laser beam on the opposite wall

B (point II).

– Without turning the tool, position it close to

wall B. Switch the tool on and allow it to

level in.

78 ft

d

180˚

A

B

78 ft

A

B

180˚

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