Bosch GPL5 Service Manual download pdf (Page 9)

-9-

– Align the height of the tool (using the tripod

or by underlaying, if required) in such a

manner that the center point of the laser

beam is projected exactly against the

previously marked point II on wall B.

– Rotate the tool by 180° without changing

the height. Allow it to level in and mark the

center point of the laser beam on wall A

(point III). Take care that point III is as

vertical as possible above or below point I.

– The difference d of both marked points I

and III on wall A indicates the actual height

deviation of the tool.

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

III should not exceed 9/16 in (max.).

Checking the Vertical Leveling Accuracy

For this check, a free measuring distance of

approx. 13 ft between floor and ceiling on a

firm surface is required.

– Draw a straight line on the ceiling.

– Mount the tool to the multi-purpose

attachment or a tripod. Switch the tool on

and rotate it in such a manner that the

bottom plumb beam can be seen on

the floor.

– Position the tool in such a manner that the

upper plumb beam points against the line

on the ceiling. Allow the tool to level in.

Mark the center of the upper laser point on

the line on the ceiling (point I). Also, mark

the center of the laser point on the floor

(point II).

– Rotate the tool by 180°. Position it in such

a manner that the center of the bottom

laser point is directed on the already

marked point II and the upper laser point is

directed against the line on the ceiling.

Allow the tool to level in. Mark the center

of the upper laser point on the line on the

ceiling (point III).

– The difference d of both marked points I

and III on the ceiling results in the actual

deviation of the tool to the plumb line.

On the measuring distance of 2 x 13 ft = 26 ft

, the maximum allowable deviation is:

26 ft x ±0.0036 in/ft = ±3/16 in.

Thus, the difference d between points I and

III should not exceed 3/16 in (max.).

Recalibration Procedure

All tools are calibrated when processed

through the Bosch quality control program.

This process assures that the customer

receives a superior product which conforms

to the Product Specifications. Although tools

have been calibrated before reaching our

customers, it contains many precision

machined parts which may be affected if the

instrument is subjected to abuse. Therefore,

if the device is ever dropped or sustains

A

B

d

180˚

A

B

13 ft

d

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