BOSCH GLL 3-50 Professional Instruction Manual
- June 14, 2024
- Bosch
Table of Contents
BOSCH GLL 3-50 Professional
Safety Instructions
All instructions must be read and observed in order for the measuring tool to function safely. The safeguards integrated into the measuring tool may be compromised if the measuring tool is not used in accordance with these instructions. Never make warning signs on the measuring tool unrecognizable. SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE AND INCLUDE THEM WITH THE MEASURING TOOL WHEN TRANSFERRING IT TO A THIRD PARTY.
- Warning! If operating or adjustment devices other than those specified here are used or other procedures are carried out, this can lead to dangerous exposure to radiation.
- The measuring tool is delivered with a laser warning sign (marked in the illustration of the measuring tool on the graphics page).
- If the text of the laser warning label is not in your national language, stick the provided warning label in your national language over it before operating for the first time.
- Do not direct the laser beam at persons or animals and do not stare into the direct or reflected laser beam yourself. You could blind somebody, cause accidents or damage your eyes.
- If laser radiation hits your eye, you must close your eyes and immediately turn your head away from the beam.
- Do not make any modifications to the laser equipment.
- Do not use the laser goggles (accessory) as protective goggles. The laser goggles make the laser beam easier to see; they do not protect you against laser radiation.
- Do not use the laser goggles (accessory) as sunglasses or while driving. The laser goggles do not provide full UV protection and impair your ability to see colours.
- Have the measuring tool serviced only by a qualified specialist using only original replacement parts. This will ensure that the safety of the measuring tool is maintained.
- Do not let children use the laser measuring tool unsupervised. They could unintentionally blind themselves or other persons.
- Do not use the measuring tool in explosive atmospheres which contain flammable liquids, gases or dust. Sparks may be produced inside the measuring tool, which can ignite dust or fumes.
- Keep the measuring tool and the magnetic accessories away from implants and other medical devices, e.g. pacemakers or insulin pumps. The magnets inside the measuring tool and accessories generate a field that can impair the function of implants and medical devices.
- Keep the measuring tool and the magnetic accessories away from magnetic data storage media and magnetically sensitive devices. The effect of the magnets inside the measuring tool and accessories can lead to irreversible data loss.
Product Description and Specifications
Please observe the illustrations at the beginning of this operating manual.
Intended Use
The measuring tool is intended for determining and checking horizontal and
vertical lines and plumb points. The measuring tool is suitable for indoor and
outdoor use. This product is a consumer laser product in accordance with EN
50689.
Product Features
The numbering of the product features shown refers to the illustration of the
measuring tool on the graphic page.
- Laser beam outlet aperture
- Receiver mode indicator
- Receiver mode button
- Button for laser operating mode
- Battery Warning
- 1/4″ tripod mount
- Battery compartment cover
- Battery compartment cover locking mechanism
- 5/8″ tripod mount
- Laser warning label
- Serial number
- On/off switch
- Guide groove
- Locking screw for telescopic leg
- Fine adjustment screw of the rotating platform
- Rotating platform
- Guide rail
- Magnet
- Laser target plate
- Laser goggle
- Tripod (BT 150)
- Telescopic shaft (BT 350)
- Laser receiver)
- Laser receiver holder)
- Universal holder (BM 1)
- Case
a) Accessories shown or described are not included with the product as standard. You can find the complete selection of accessories in our accessories range.
Technical Data
- A) The working range may be reduced by unfavorable environmental conditions (e.g. direct sunlight).
- B) At 20–25 °C
- C) The values stated presuppose normal to favorable environmental conditions (e.g. no vibration, no fog, no smoke, no direct sunlight). Extreme fluctuations in temperature can cause deviations in accuracy.
- D) Only non-conductive deposits occur, whereby occasional temporary conductivity caused by condensation is expected. The serial number (11) on the type plate is used to clearly identify your measuring tool.
Assembly
Inserting/Changing the batteries
It is recommended that you use alkaline manganese batteries to operate the
measuring tool. To open the battery compartment cover (7), pull the locking
mechanism (8) and lift the battery compartment cover. Insert the batteries.
When doing so, ensure that the polarity is correct and corresponds to the
diagram on the battery compartment cover. If the battery warning (5) flashes
red, the batteries must be replaced. Always replace all the batteries at the
same time. Only use batteries from the same manufacturer and which have the
same capacity.
- Take the batteries out of the measuring tool when you are not using it for a prolonged period of time. The batteries can corrode and self-discharge during prolonged storage in the measuring tool.
Working with the rotating platform
You can use the rotating platform (16) to rotate the measuring tool 360°
around a central, always visible plumb point. This enables you to set up the
laser lines precisely, without having to change the position of the measuring
tool. Place the measuring tool with the guide groove (13) on the guide rail
(17) of the rotating platform (16) and slide the measuring tool as far as it
will go onto the platform. To disconnect the measuring tool, pull it off the
rotating platform in the opposite direction. To adjust the height of the
rotating platform, unscrew and remove the locking screw (14) of one of the
telescopic legs. Lock the telescopic leg by tightening the locking screw.
Repeat the process for the other two telescopic legs. If the measuring tool is
mounted on the rotating platform (16), you can use the fine adjustment screw
(15) to align vertical laser lines precisely with reference points.
Operation
Starting Operation
- Protect the measuring tool from moisture and direct sunlight.
- Do not expose the measuring tool to any extreme temperatures or fluctuations in temperature. For example, do not leave it in a car for extended periods of time. If it has been subjected to significant fluctuations in temperature, first allow the measuring tool to adjust to the ambient temperature and then always carry out an accuracy check before continuing work (see “Accuracy Check of the Measuring Tool”, page 16). The precision of the measuring tool may be compromised if exposed to extreme temperatures or fluctuations in temperature.
- Avoid substantial knocks to the measuring tool and avoid dropping it. Always carry out an accuracy check before continuing work if the measuring tool has been subjected to severe external influences (see “Accuracy Check of the Measuring Tool”, page 16).
- Switch the measuring tool off when transporting it. The pendulum unit is locked when the tool is switched off, as it can otherwise be damaged by big movements.
Switching On/Off
To switch on the measuring tool, slide the on/off switch (12) to the On
position (for working with the pendulum lock) or to the On position (for
working with automatic levelling). As soon as it is switched on, the measuring
tool emits laser beams from the outlet apertures (1).
- Do not direct the laser beam at persons or animals and do not stare into the laser beam yourself (even from a distance).
To switch off the measuring tool, slide the on/off switch (12) to the Off position. The pendulum unit is locked when the tool is switched off.
- Never leave the measuring tool unattended when switched on, and ensure the measuring tool is switched off after use. Others may be blinded by the laser beam.
If the maximum permitted operating temperature of 40 °C is exceeded, the tool shuts down to protect the laser diode. Once it has cooled down, the measuring tool is operational again and can be switched back on.
Deactivating the automatic shut-off function
If no button on the measuring tool is pressed for approx. 30 min, the
measuring tool will automatically switch itself off to preserve battery life.
To deactivate the automatic shut-off function, hold down the laser mode button
(4) for at least 3 s when switching on the measuring tool. The laser beams
will flash briefly after 3 s if the automatic shut-off function is
deactivated. To activate the automatic shut-off function, switch the measuring
tool off and on again (without holding down the laser mode button (4)).
Operating Modes
The measuring tool has several operating modes, which you can switch between
at any time:
- Horizontal mode combined with vertical mode: Generates one horizontal and two orthogonal vertical laser lines
- Horizontal mode: Generates one horizontal laser line
- Cross-line mode: Generates one horizontal and one vertical laser line
- Vertical mode: Generates two orthogonal vertical laser lines
In all operating modes, a plumb point is projected onto the floor. Once switched on, the measuring tool is in horizontal mode combined with vertical mode. To change the operating mode, press the laser mode button (4). All operating modes can be selected with both automatic levelling or the pendulum lock.
Receiver Mode
Receiver mode must be activated when working with the laser receiver (23),
regardless of which operating mode is selected. In receiver mode, the laser
lines flash at a very high frequency, enabling them to be detected by the
laser receiver (23). To switch on receiver mode, press the receiver mode
button (3). The receiver mode indicator (2) will light up green. When receiver
mode is switched on, the laser lines are less visible to the human eye.
Therefore, switch receiver mode off by pressing the receiver mode button (3)
again to work without a laser receiver. The receiver mode indicator (2) will
go out.
Automatic Levelling
-
Working with Automatic Levelling
Position the measuring tool on a level, firm surface or attach it to the rotating platform (16) or the tripod (21). For work with automatic levelling, slide the on/off switch (12) to the “ ****On” position. The automatic levelling function automatically levels irregularities within the self- levelling range of ±4°. The levelling is finished as soon as the laser beams stop flashing. If automatic levelling is not possible, e.g. because the surface on which the measuring tool stands deviates by more than 4° from the horizontal plane, the laser beams will begin to flash quickly. Place the measuring tool in a horizontal position and wait for self-levelling to take place. As soon as the measuring tool is within the self-levelling range of ±4°, the laser beams will light up continuously. In case of ground vibrations or position changes during operation,the measuring tool is automatically levelled again. Upon re-levelling, check the position of the horizontal or vertical laser line with regard to the reference points to avoid errors by moving the measuring tool. -
Working with the pendulum lock
For work with the pendulum lock, slide the on/off switch (12) to the “ ****On” position. The laser lines continuously flash slowly when working with the pendulum lock. For work with the pendulum lock, the automatic levelling is switched off. You can hold the measuring tool freely in your hand or place it on a sloping surface. This means that the laser lines are no longer levelled and no longer necessarily run perpendicular to one another.
Accuracy Check of the Measuring Tool
-
Influences on Accuracy
The largest influence is exerted by the ambient temperature. In particular, temperature differences that occur from the ground upwards can refract the laser beam. In order to minimise thermal influences resulting from heat rising from the floor, it is recommended that you use the measuring tool on a tripod. In addition, position the measuring tool in the centre of the work surface, wherever this is possible. In addition to external influences, device-specific influences (e.g. falls or heavy impacts) can also lead to deviations. For this reason, check the levelling accuracy each time before beginning work. First check the height accuracy and levelling accuracy of the horizontal laser line, then the levelling accuracy of the vertical laser line. Should the measuring tool exceed the maximum deviation during one of the tests, please have it repaired by a Bosch after-sales service. -
Checking the Height Accuracy of the Horizontal Line
For this check, you will need a free measuring distance of 5 m on firm ground between two walls (designated A and B).- Mount the measuring tool close to wall A on a tripod, or place it on a firm, level surface. Switch on the measuring tool. Select cross-line mode with automatic levelling.
- Aim the laser at the closer wall A and allow the measuring tool to level in. Mark the middle of the point at which the laser lines cross on the wall (point I).
- Turn the measuring tool 180°, allow it to level in and mark the point where the laser lines cross on the opposite wall B (point Ⅱ).
- Position the measuring tool – without rotating it – close to wall B, switch it on and allow it to level in.
- Align the height of the measuring tool (using the tripod or by placing objects underneath as required) so that the point where the laser lines cross exactly hits the previously marked point Ⅱ on wall B.
- Turn the measuring tool 180° without adjusting the height. Aim it at wall A such that the vertical laser line runs through the already marked point Ⅰ. Allow the measuring tool to level in and mark the point where the laser lines cross on wall A (point Ⅲ).
- The discrepancy d between the two marked points Ⅰ and Ⅲ on wall A reveals the actual height deviation of the measuring tool.
The maximum permitted deviation on the measuring distance of 2 × 5 m = 10 m is as follows: 10 m × ±0.3 mm/m = ±3 mm. The discrepancy d between points Ⅰ and Ⅲ must therefore amount to no more than 3 mm.
-
Checking the Level Accuracy of the Horizontal Line
For this check, you will need a free area of 5 × 5 m.- Mount the measuring tool in the middle between walls A and B on a tripod, or place it on a firm, level surface. Select horizontal mode with automatic levelling and allow the measuring tool to level in.
- At a distance of 2.5 m from the measuring tool, mark the centre of the laser line on both walls (point Ⅰ on wall A and point Ⅱ on wall B).
- Set up the measuring tool at a 5 m distance and rotated by 180° and allow it to level in.
- Align the height of the measuring tool (using the tripod or by placing objects underneath as required) so that the centre of the laser line exactly hits the previously marked point Ⅱ on wall B.
- Mark the centre of the laser line on wall A as point Ⅲ (vertically above or below point Ⅰ).
- The discrepancy d between the two marked points Ⅰ and Ⅲ on wall A reveals the actual horizontal deviation of the measuring tool.
The maximum permitted deviation on the measuring distance of 2 × 5 m = 10 m is as follows: 10 m × ±0.3 mm/m = ±3 mm. The discrepancy d between points Ⅰ and Ⅲ must therefore amount to no more than 3 mm.
-
Checking the Level Accuracy of the Vertical Line
For this check, you will need a door opening (on solid ground) which has at least 2.5 m of space either side of the door.- Place the measuring tool 2.5 m away from the door opening on a firm, flat surface (not on a tripod). Select crossline mode with automatic levelling. Aim the vertical laser line at the door opening and allow the measuring tool to level in.
- 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).
- 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 follows: Doubled height of the door opening × 0.3 mm/m Example: At a door opening height of 2 m, the maximum deviation 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 automatic levelling and allow the measuring tool to level in.
- 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).
- 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 measuring tool from the vertical plane.
You can calculate the maximum permitted deviation as follows: 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
-
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 the visibility of the laser beam in unfavorable 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
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 (see figure E)
Use the laser receiver (23) to improve detection of the laser lines in adverse lighting conditions (bright environment, direct sunlight) and over greater distances. When working with the laser receiver, switch on receiver mode (see “Receiver Mode”, page 16). -
Laser Goggles
The laser goggles filter out ambient light. This makes the light of the laser appear brighter to the eye.- Do not use the laser goggles (accessory) as protective goggles. The laser goggles make the laser beam easier to see; they do not protect you against laser radiation.
- Do not use the laser goggles (accessory) as sunglasses or while driving. The laser goggles do not provide full UV protection and impair your ability to see colours.
-
Example applications (see figures A–F)
Examples of possible applications for the measuring tool can be found on the graphics pages.
Maintenance and Service
Maintenance and Cleaning
Keep the measuring tool clean at all times. Never immerse the measuring tool
in water or other liquids. Wipe off any dirt using a damp, soft cloth. Do not
use any detergents or solvents. The areas around the outlet aperture of the
laser in particular should be cleaned on a regular basis. Make sure to check
for lint when doing this. Only store and transport the measuring tool in the
case (26). If the measuring tool needs to be repaired, send it off in the case
(26).
After-Sales Service and Application Service
Our after-sales service responds to your questions concerning 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 accessories. In all correspondence and spare parts orders, please always include the 10‑digit article number given on the nameplate of the product.
Malaysia
Robert Bosch Sdn. Bhd.(220975-V) PT/SMY No. 8A, Jalan 13/6 46200 Petaling Jaya
Selangor
Tel.: (03) 79663194
Toll-Free: 1800 880188
Fax: (03) 79583838
E-Mail: kiathoe.chong@my.bosch.com
www.bosch-pt.com.my
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:
boschservicecentre@bosch.com
You can find further service addresses at: www.bosch- pt.com/serviceaddresses
Disposal
Measuring tools, accessories and packaging should be recycled in an
environmentally friendly manner. Do not dispose of measuring tools or
batteries with household waste.
Only for EU countries:
According to the Directive 2012/19/EU on waste electrical and electronic
equipment and its transposition into national law, measuring tools that are no
longer usable, and, according to the Directive 2006/66/EC, defective or
drained batteries must be collected separately and disposed of in an
environmentally correct manner. If disposed incorrectly, waste electrical and
electronic equipment may have harmful effects on the environment and human
health, due to the potential presence of hazardous substances.
Only for United Kingdom:
According to The Waste Electrical and Electronic Equipment Regulations 2013
(SI 2013/3113) (as amended) and the Waste Batteries and Accumulators
Regulations 2009 (SI 2009/890) (as amended), products that are no longer
usable must be collected separately and disposed of in an environmentally
friendly manner.
Robert Bosch Power Tools GmbH
70538 Stuttgart
GERMANY
www.bosch-pt.com
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