GLM 20 Professional - Laser pointer BOSCH - Free user manual and instructions

Product Type	Laser Distance Measurer
Model	GLM 20 Professional
Brand	Bosch
Measurement Range	0.15 – 20 m
Measurement Accuracy	±2.0 mm
Laser Class	Class 2 (635 nm, <1 mW)
Power Supply	2 x 1.5V AAA batteries
Battery Life	Approximately 20,000 measurements
Auto-Off	After 5 minutes of inactivity
Display	Illuminated backlit LCD
Measurement Functions	Length, continuous measurement
Dimensions	101 x 52 x 28 mm
Weight	Approximately 100 g (with batteries)
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +70°C
Maximum Humidity	90 % (non-condensing)
Safety Precautions	Do not stare into laser beam. Class 2 laser product.
Maintenance	Clean lens with soft cloth; avoid solvents.
Reparability	No user-serviceable parts. Contact Bosch service.
Warranty	2 years (subject to terms)

Frequently Asked Questions - GLM 20 Professional BOSCH

How do I turn on the Bosch GLM 20 Professional?

Press the On/Measure button briefly. The laser will activate and you can take a measurement.

Why does the device show an error?

Common errors include target too far or too reflective. Ensure the target is within 20 m and not a mirror-like surface.

What batteries does the GLM 20 use?

It uses 2 AAA batteries (1.5V). Use alkaline or rechargeable batteries.

How can I clean the lens?

Use a soft, dry cloth. Do not use any liquids or solvents as they may damage the optics.

Is the laser eye-safe?

Yes, it is a Class 2 laser product. However, do not stare directly into the beam.

Can I measure continuously?

Yes, press and hold the On/Measure button for about 2 seconds to enter continuous measurement mode.

What is the accuracy of the device?

The accuracy is ±2.0 mm under favorable conditions. Factors like temperature and surface texture may affect it.

How do I change between feet and meters?

The GLM 20 does not have a unit switch. It displays in meters (m) only.

Why does the device turn off automatically?

To save battery, the device auto-powers off after 5 minutes of inactivity. Press any button to turn it back on.

Where can I get the user manual?

The user manual is available for free download on notice-facile.com in multiple languages. Use the download link on the page.

USER MANUAL GLM 20 Professional BOSCH

GLM 20

Robert Bosch Power Tools GmbH

70538 Stuttgart

GERMANY

www.bosch-pt.com

1 609 92A 4JT (2018.09) O / 88

BOSCH

en Original instructions

English ...... page 6

1 609 92A 4JT | (05.09.2018) Bosch Power Tools

5

A

*

0.500m

B

English

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 unrecognisable. 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 warning sign (marked in the illustration of the measuring tool on the graphics page with number (6)).

IEC 60825-1:2014

<1mW @635 nm

Laser Radiation Do not stare into beam Class 2 laser product

▶ If the text on the warning label is not in your native language, cover it with the label supplied, which is in your language, before initial commissioning.

Do not direct the laser beam at persons or animals and do not look directly into the laser beam or at its reflection. Doing so could lead to blindless, or could cause accidents or damage to the eyes.

▶ If laser radiation hits your eye, you must close your eyes and immediately turn your head away from the beam. ▶ Do not use the laser goggles 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 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 accidentally dazzle someone. ▶ 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. ▶ Do not make any modifications to the laser equipment.

Product Description and Specifications

Intended Use

The measuring tool is intended for measuring distances, lengths, heights and clearances.

The measuring tool is suitable for indoor and outdoor use.

Product features

The numbering of the product features shown refers to the illustration of the measuring tool on the graphic page.

(1) On/off button ("Hold" button) (2) Display (3) Battery compartment cover (4) Locking mechanism of the battery compartment cover (5) Serial number (6) Laser warning label (7) Reception lens (8) Laser beam output

Display elements

(a) Battery warning

(b) Temperature warning (c) Laser switched on (d) Measurement stopped (e) Previous measured value (f) Unit of measurement (g) Current measured value

Technical Data

Digital laser measure GLM 20
Article number 3 601 K72 E..
Measuring range (typical) 0.15–20 m	A)
Measuring accuracy (typical) ± 3.0 mm	B)
Smallest display unit 1 mm
Measuring time
- typical 0.5 s
- maximum 4 s
Operating temperature -10 °C to +40 °C
Storage temperature -20 °C to +70 °C
Max. relative humidity 90%
Max. working height above reference height 2000 m
Degree of soiling in accordance with IEC 61010-1 2	C)
Laser class 2
Laser type 635 nm, < 1 mW
Laser beam diameter (at 25 °C) approx.
- 10 m distance	9 mm
- 20 m distance	18 mm
Batteries	2 x 1.5 V LR03 (AAA)
Battery life during measuring operation approx.	5 h
Weight according to EPTA-Procedure 01:2014	0.13 kg

Digital laser measure GLM 20

Dimensions 100 x 36 x 23 mm

A) The working range increases depending on how well the laser light is reflected from the surface of the target (scattered, not reflective) and how bright the laser point is relative to the ambient light intensity (interior spaces, twilight). In unfavourable conditions, e.g. with extremely bright interior lighting or a poorly reflecting surface, the measuring range may be reduced. B) In unfavourable conditions, e.g. with extremely bright interior lighting, a poorly reflecting surface, or a room temperature that deviates significantly from 25 °C, the maximum deviation can be up to ± 7 mm at 15 m. In favourable conditions, a deviation influence of ± 0.05 mm/m needs to be taken into account. C) non-conductive soiling only, whereby occasional temporary conductivity caused by condensation is expected The serial number (5) on the type plate is used to clearly identify your measuring tool.

Fitting

Inserting/Changing the Batteries

It is recommended that you use alkaline manganese batteries to operate the measuring tool.

Push the locking mechanism (4) in the direction of the arrow to open the battery compartment cover (3) and remove the battery compartment cover. Insert the batteries. When inserting, pay attention to the correct polarity according to the representation on the inside of the battery compartment.

When the battery symbol first appears on the display, measurements can be made for approx. another 15 minutes. When the battery symbol flashes, you have to replace the batteries because measurements are no longer possible.

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.

Operation

Start-Up

Never leave the measuring tool unattended when switched on, and ensure the measuring tool is switched off after use. Others may be dazzled by the laser beam. Protect the measuring tool from moisture and direct sunlight. Do not expose the measuring tool to any extreme temperatures or variations in temperature. For example, do not leave it in a car for extended periods of time. In case of large variations in temperature, allow the measuring tool to adjust to the ambient temperature before putting it into operation. The precision of the measuring tool may be compromised if exposed to extreme temperatures or variations in temperature. Avoid subjecting the measuring tool to violent jolts and falls. Always check the measuring tool before continuing work if it has been subjected to severe external influences (see "Checking the Measuring Tool", page 14).

Switching On/Off

To switch on the measuring tool, press the on/off button (1). When the measuring tool is switched on, the laser beam is switched on. The laser symbol flashes on the display.

To switch off the measuring tool, press and hold the on/off button (1) for at least three seconds.

If no button on the measuring tool is pressed for approx. 5 mins, the measuring tool will automatically switch itself off to preserve battery life.

Measuring Process

A continuous measurement is performed after the measuring tool has been switched on. Aim the laser beam at the target surface. The current measured value (g) is shown on the bottom line of the display (see figure A). During continuous measurement, the measuring tool can be moved relative to the target and the current measured value (g) will be updated approx. every 0.5 seconds on the bottom line of the display (see figure B). You can, for example, move a desired distance away from a wall while reading off the current distance at all times. The laser symbol flashes on the display.

The rear edge of the measuring tool is the reference level for the measurement.

In order to carry out a measurement of the distance between two walls, for example, place the measuring tool with the rear edge touching the first wall.

Do not direct the laser beam at persons or animals and do not stare into the laser beam yourself (even from a distance).

"Hold" Function (see figure B)

Press the on/off button (1) to stop the measuring process. The laser beam is switched off and the Hold indicator appears on the display. The current measured value will continue to be shown in the bottom line of the display, but it will no longer be continuously updated.

Press the on/off button (1) again to switch the laser back on. The laser symbol flashes on the display. The previous measured value is displayed in the top line. The continuously updated/current measured value will be shown in the bottom line.

Press the on/off button (1) again to stop the measuring process again. The laser beam is switched off and the Hold indicator appears on the display. The previous measured value is displayed in the top line. The current measured value will be shown in the bottom line, but it will no longer

be continuously updated.

If no button on the measuring tool is pressed for approx. 5 mins, the measuring tool will automatically switch itself off to preserve battery life.

If a measured value has been held using the "Hold" function, it will be retained if the tool switches off automatically. Once the measuring tool has been switched on again by pressing the on/off button (1), the previous measured value (e) is shown in the top line of the display.

Changing the Unit of Measurement

Switch the measuring tool off.

Hold down the on/off button (1). When the required unit of measure is displayed, release the on/off button (1). After releasing, the measuring tool switches itself on with the selected setting.

Practical Advice

General Advice

The reception lens (7) and the laser beam output (8) must not be covered during the measuring process. The measurements are taken at the centre of the laser beam, even when the laser is pointed at surfaces diagonally.

Influences on the Measuring Range

The measuring range depends on the lighting conditions and the reflective properties of the target surface.

Influences on the Measurement Result

Due to physical effects, the possibility of inaccurate measurements when measuring various surfaces cannot be excluded. These include:

• Transparent surfaces (e.g. glass, water)
• Reflective surfaces (e.g. polished metal, glass) – Porous surfaces (e.g. insulating materials)
• Structured surfaces (e.g. roughcast, natural stone).

Layers of air at different temperatures and indirectly received reflections can also influence the measured value.

Errors – Causes and Corrective Measures

Cause Corrective measures

Temperature warning(b) flashes, measurement not possible.

Measuring tool is outside of the operating temperature range of -10 °C to reached operating temperature. +40 °C.

The battery warning (a) appears

The battery voltage is weakening (measuring is still possible). Change the batteries.

The battery warning (a) is flashing, measuring is not possible.

Battery voltage too low. Change the batteries.

"----" indicator appears on the display.

The measuring tool was moved too quickly. Move the measuring tool more slowly. The measuring object is outside of the range of the laser beam. Go closer to the measuring object.

All indicators on the display are flashing.

The measuring tool is faulty. Contact customer service.

The laser beam output (8) and/or reception lens (7) are fogged up (e.g. due to a rapid temperature change). Wipe the laser beam output (8) and/or reception lens (7) dry with a soft cloth.

"Err" indicator appears after the on/off button is pressed.

Measuring result is unreliable.

Target surface reflection not distinct. Cover the target surface (e.g. water, glass).

Laser beam output (8) and/or reception lens (7) are covered. Keep the laser beam output (8) and/or reception lens (7) clear.

Measurement result implausible.

Obstruction in the path of the laser beam. Laser point must be fully on the target surface.

The measuring tool monitors for correct operation in every measurement. If a defect is detected, all indicators on the display will flash. In this case, or if you are unable to rectify an error using the corrective measures above, send the measuring tool to Bosch customer service via your dealer.

Checking the Measuring Tool

You can check the accuracy of the measuring tool as follows:

- Choose a measuring section of approx. 1–10 m in length that is permanently unchanged, the exact length of which is known to you (e.g. room width, door opening). The measuring section must be indoors, and the target surface of the measurement must be smooth and reflect well.

- Measure the section ten times in succession.

The deviation of the individual measurements from the mean value must not exceed ± 1.6 mm over the entire measuring section in favourable conditions. Record the measurements in order to be able to compare the accuracy at a later date.

Maintenance and Servicing

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.

Take particular care of the reception lens (7), which must be handled with the same level of care you would give to a pair of glasses or a camera lens.

Send in the measuring tool if it requires repair.

After-sales service and advice on using products

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: [phone]

E-Mail: [e-mail]

Ireland

Origo Ltd.

Unit 23 Magna Drive

Magna Business Park

City West

Dublin 24

Tel. Service: [phone]

Fax: [phone]

Australia, New Zealand and Pacific Islands

Robert Bosch Australia Pty. Ltd.

Power Tools

Locked Bag 66

Clayton South VIC 3169

Customer Contact Center

Inside Australia:

Phone: [phone]

Fax: [phone]

Inside New Zealand:

Phone: [phone]

Fax: [phone]

Outside AU and NZ:

Phone: [phone]

www.bosch-pt.com.au

www.bosch-pt.co.nz

16 | English

Republic of South Africa

Customer service

Hotline: [phone]

Gauteng - BSC Service Centre

35 Roper Street, New Centre

Johannesburg

Tel.: [phone]

Fax: [phone]

E-mail: [e-mail]

KZN - BSC Service Centre

Unit E, Almar Centre

143 Crompton Street

Pinetown

Tel.: [phone]

Fax: [phone]

E-mail: [e-mail]

Western Cape - BSC Service Centre

Democracy Way, Prosperity Park

Milnerton

Tel.: [phone]

Fax: [phone]

E-mail: [e-mail]

Bosch Headquarters

Midrand, Gauteng

Tel.: [phone]

Fax: [phone]

E-mail: [e-mail]

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, 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.

Turkish

Safety instructions

Laser Radiation Do not stare into beam Class 2 laser product

Laser Radiation Do not stare into beam Class 2 laser product

Laser Radiation Do not stare into beam Class 2 laser product

Laser Radiation Do not stare into beam Class 2 laser product

Laser Radiation Do not stare into beam Class 2 laser product

Warning in your language