Example Applications; Maintenance And Service; Maintenance And Cleaning - Bosch Professional GRL 400 H Manual Original

20 | English

Example applications

Checking depths of foundation pits (see figure D)
Place the measuring tool on a stable surface or mount it on a
tripod (25).
Working with a tripod: Set the laser beam at the required
height. Apply or check the height at the target location.
Working without the tripod: Establish the height difference
between the laser beam and the height at the reference
Overview of the rotary laser indicators
Switching on the measuring tool (1 s self-
check)
Levelling in or re-levelling
Measuring tool levelled in/ready for operation
Self-levelling range exceeded
Shock-warning function activated
Shock-warning actuated
Battery voltage for ≤ 2 h operation
Batteries drained
●: Continuous operation
2 ×/s: Flashing frequency (e.g. twice per second)
○: Function stopped

Maintenance and Service

Maintenance and Cleaning

Keep the rotary laser and laser receiver clean at all times.
Never immerse the rotary laser or laser receiver in water or
other liquids.
Wipe off any dirt using a damp, soft cloth. Do not use any de-
tergents or solvents.
In particular, the areas around the outlet aperture of the
rotary laser should be cleaned on a regular basis. Make sure
to check for lint when doing this.
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. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
In all correspondence and spare parts orders, please always
include the 10‑digit article number given on the nameplate
of the product.
1 609 92A 73P | (13.01.2022)
point. Apply or check the height difference measured at the
target location.
When measuring on large distances, you should always set
the measuring tool in the centre of the work area and on a tri-
pod in order to minimise interference.
When working on unstable ground, mount the measuring
tool on the tripod (25). Take care that the shock-warning
function is activated, in order to avoid faulty measurements
in case of ground vibrations or shock to the measuring tool.
Laser beam Rotation of
the laser
beam
Green
2 ×/s ○ 2 ×/s
● ●
2 ×/s ○
2 ×/s ○
○ ○
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham Uxbridge
UB 9 5HJ
At www.bosch-pt.co.uk you can order spare parts or arrange
the collection of a product in need of servicing or repair.
Tel. Service: (0344) 7360109
E-Mail: [email protected]
You can find further service addresses at:
www.bosch-pt.com/serviceaddresses
Disposal
Electrical and electronic equipment, accessories and pack-
aging should be sorted for environmental-friendly recycling.
Do not dispose of electrical and electronic
equipment or batteries with household waste.
Only for EU countries:
In accordance with Directive 2012/19/EU and Directive
2006/66/EC respectively, electrical and electronic equip-
ment that is no longer usable and defective/drained batter-
Red Green Red
● ●
●
●
●
2 ×/s
Bosch Power Tools
Red
●
2 ×/s
●