English | 11
Bosch Power Tools 1 609 92A 271 | (8.11.16)
Checking the Crosshair
A measuring distance of approx. 30 m is required for the
check. Set up the measuring tool in the centre and levelling
rods A and B at both ends of the measuring distance.
After aligning and focussing the measuring tool, read the
heights at both levelling rods. Calculate the difference d be-
tween the height a
1
of levelling rod A and the height b
1
of lev-
elling rod B.
Example:
a
1
=1.937m
b
1
= 1.689 m
a
1
– b
1
= 1.937 m – 1.689 m = 0.248 m = d
Set up the measuring tool approx. 1 m away from levelling rod
A. After aligning and focussing the measuring tool, read the
height a
2
at levelling rod A.
Subtract the previously calculated value d from the measured
height a
2
in order to receive the set value for the height b
2
at
levelling rod B.
Measure height b
2
at levelling rod B. When the measured val-
ue deviates by more than 6 mm (GOL 20 D/G), 3 mm
(GOL 26 D/G) or 2 mm (GOL 32 D/G) from the calculated set
value, the crosshair must be readjusted.
Example:
a
2
=1.724m
d =0.248m
a
2
– d = 1.724 m – 0.248 m = 1.476 m
GOL 20 D/G: When measuring, height b
2
must be 1.476 m
±6 mm.
GOL 26 D/G: When measuring, height b
2
must be 1.476 m
±3 mm.
GOL 32 D/G: When measuring, height b
2
must be 1.476 m
±2 mm.
Readjusting the Crosshair
Unscrew the eyepiece cover 4. Using the adjusting pin 18,
turn adjusting screw 5 clockwise or anticlockwise, until the
calculated set value for height b
2
is reached when measuring
on levelling rod B.
Screw on eyepiece cover 4 again.
Example:
When measuring b
2
, the value 1.476 m must be set.
Check the crosshair again. If required, repeat the procedure
or refer to an authorised Bosch after-sales service.
Maintenance and Service
Maintenance and Cleaning
Store and transport the measuring tool only in the supplied
case.
Keep the measuring tool clean at all times.
Do not immerse the measuring tool in water or other fluids.
Wipe off debris using a moist and soft cloth. Do not use any
cleaning agents or solvents.
Handle the lenses with particular attention. Remove dust only
with a soft brush. Do not touch the lenses with your fingers.
Before storing, allow the measuring tool and the case to dry
completely. A bag of silica gel dryer for the removal of residual
moisture is included in the case. Renew the bag of silica gel
dryer regularly.
For repairs, only send in the measuring tool in the case.
After-sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch’s application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts orders, please always
include the 10-digit article number given on the nameplate of
the product.
AB
30 m
a
1
b
1
d
a
1
– b
1
= d
AB
1 m
a
2
b
2
a
2
– d = b
2
d
18 5
OBJ_BUCH-1239-005.book Page 11 Tuesday, November 8, 2016 2:22 PM
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