Bosch GLL 2-20 Professional Line lasers Instruction Manual

BOSCH GLL 2-20 Professional Line Lasers

 

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.
• 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.
• 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 colors.
• 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 magnetic accessories away from magnetic data storage media and magnetically-sensitive devices. The effect of the magnets in the 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.
The measuring tool is suitable for indoor use.

Product Features

The numbering of the product features shown refers to the il-lustration of the measuring tool on the graphic page.

 

1. Laser beam outlet aperture
2. On/off switch
3. 1/4″ tripod mount
4. Serial number
5. Laser warning label
6. Battery compartment cover
7. Battery compartment cover locking mechanism
8. Pendulum lock button Lock
9. Button for laser operating mode Mode
10. Levelling warning
11. Laser operating mode indicator
12. Pendulum lock indicator
13. Universal holder
14. Ceiling clip of holder
15. Holder 1/4″ screw
16. Ceiling clip locking mechanism
17. Ceiling clip rotary knob
18. Holder screw hole
19. Magnet
20. Holder stabilizing legs
21. Laser viewing glasses
22. Laser target plate
23. Tripod
24. Case

• Accessories shown or described are not included with the product as standard. You can find the complete selection of accessories in our accessories range.

Usage

Technical Data

A) The working range may be reduced by unfavorable environ-mental conditions (e.g. direct sunlight).
B) At 20–25 °C
C) The values stated presuppose normal to favorable environ-mental 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 (4) 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 or re-chargeable batteries to operate the measuring tool.
To open the battery compartment cover (6), press the lock-ing mechanism (7) and lift open the battery compartment cover. Insert the batteries/rechargeable batteries.

When inserting the batteries, ensure the polarity is correct according to the representation on the inside of the battery compartment cover.
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 bat-teries can corrode and self-discharge during prolonged storage.

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.
  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.
• 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 (2) to the “On” position. As soon as it is switched on, the measuring tool emits laser lines from the outlet apertures.

• 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 (2) 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.

Operating Modes

Once the measuring tool has been switched on, it is in cross-line operation with automatic levelling.
To change the operating mode, press the Mode button for laser operating mode until the required laser operating mode is displayed by the corresponding “Laser operating mode” indicator lighting up.
All operating modes can be selected with both automatic levelling or the pendulum lock.

Automatic Levelling

Working with Automatic Levelling
To work with automatic levelling, the pendulum lock indicator must not light up. If necessary, switch the automatic levelling on again by pressing the pendulum lock button Lock so that the pendulum lock indicator goes out.
Position the measuring tool on a level, firm surface or attach it to the universal holder or the tripod.
The automatic levelling function automatically compensates irregularities within the self-levelling range of ±4°. The level-ling is finished as soon as the laser lines stop moving.
If automatic levelling is not possible, e.g. because the sur-face on which the measuring tool stands deviates by more than 4° from the horizontal plane, the levelling warning lights up red and the laser is switched off automatically.
If this is the case, set up the measuring tool in a level position and wait for the self-levelling to take place. As soon as the measuring tool is within the self-levelling range of ±4° again, the levelling warning goes out and the laser is switched on.
It is not possible to work with automatic levelling outside the self-levelling range of ±4°, as the levelling accuracy of the laser beams cannot be guaranteed and it cannot be guaran-teed that the laser beams are perpendicular.
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 a Pendulum Lock
To work with the pendulum lock, press the pendulum lock button Lock. The pendulum lock indicator lights up red when the pendulum lock is switched on.
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.
Since the temperature stratification is greatest at ground level, you should mount the measuring tool on a tripod and position it 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.
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 Horizontal Levelling Accuracy
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 × ±0.4 mm/m = ±4 mm. The discrepancy d between points Ⅰ and Ⅱ must therefore amount to no more than 4 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 vertical mode with automatic levelling. Aim the vertical laser line at the door opening and allow the measuring tool to level in.
  
• Mark the center 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 center passes through points Ⅰ and Ⅱ exactly.
• Mark the center 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 × 0.4 mm/m Example: At a door opening height of 2 m, the maximum deviation amounts to
2 × 2 m × ±0.4 mm/m = ±1.6 mm. The points Ⅲ and Ⅳ must therefore be no further than 1.6 mm from each other.

Working Advice

• Only the center of the laser line must be used for marking. The width of the laser line changes depending on the distance.

Working with the Tripod (Accessory)
A tripod offers a stable, height-adjustable support surface for measuring. Place the measuring tool with the 1/4″ tripod mount on the thread of the tripod or a conventional camera tripod. Tighten the measuring tool using the locking screw of the tripod.
Roughly align the tripod before switching on the measuring tool.

Securing with the universal holder (accessory)
Using the universal holder, you can secure the measuring tool on vertical surfaces, pipes or magnetizable materials, for example. The universal holder is also suitable for use as a floor stand and facilitates height adjustment of the measuring tool.
To secure the measuring tool to the universal holder, screw the holder’s 1/4″ screw firmly in the tripod mount on the measuring tool.
To turn or move the measuring tool on the holder, loosen the 1/4″ screw slightly.
When using the ceiling clip, fine adjustments can be performed by moving the measuring tool up and down using the rotary knob.
Roughly align the universal holder before switching on the measuring tool.
The measuring tool can be secured as follows using the universal holder:

• The universal holder (without ceiling clip) can be attached to magnetic surfaces using the magnets.
• You can use the universal holder (without ceiling clip) as a tabletop tripod by placing the holder on the floor and folding out the holder’s stabilizing legs.
• The universal holder (without ceiling clip) can be screwed onto dry walls or wood. To do this, insert a (commercially available) fastening screw measuring at least 50 mm long into the screw hole in the holder and screw it down firmly.
• The universal holder can also be attached to ceiling grid rails or wall rails using the locking mechanism on the ceiling clip.

Laser Goggles (Accessory)
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 colors.

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 (24). If the measuring tool needs to be repaired, send it off in the case (24).

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.
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
Email:
You can find further service addresses at:
www.bosch-pt.com/serviceaddresses

Disposal

Measuring tools, battery packs/batteries, accessories and packaging should be sorted for environmentally friendly recycling.
Do not dispose of the measuring tools or re-chargeable/non-rechargeable batteries with household waste.

Only for EU countries:
According to the Directive 2012/19/EU, measuring tools that are no longer usable, and according to the Directive 2006/66/EC, defective or used battery packs/batteries, must be collected separately and disposed of in an environmentally correct manner.