The Bosch GLM 20 Professional is a compact laser distance measurer, offering accurate measurements for various applications.
It’s a user-friendly tool, detailed in its manual, for professionals and DIY enthusiasts alike, boasting a 635nm laser.
Overview of the Device
The Bosch GLM 20 Professional is a versatile laser distance meter designed for quick and precise measurements. This compact tool, thoroughly explained in its manual, excels at determining distances, lengths, heights, and angles. It’s suitable for indoor use, operating effectively within a temperature range of 10°C to 45°C (50°F to 113°F).
Featuring a Class 2 laser (635nm, <1mW), the GLM 20 provides reliable results, with a focus on ease of use and portability, making it ideal for various professional and personal projects.
Key Features and Specifications
The Bosch GLM 20 Professional boasts several key features, detailed in its manual, including accurate distance measurements up to 80 meters (262 feet). It offers units switching between meters, feet, and inches. Operating temperature ranges from -10°C to 45°C, with storage between -20°C to 70°C.
Relative humidity is capped at 90%, and it utilizes a Class 2 laser (635nm, <1mW). The device includes memory functions for saving and recalling measurements, enhancing workflow efficiency.
Understanding the Package Contents
The Bosch GLM 20 Professional package typically includes the laser distance measurer itself, a wrist strap, and a quick start guide, as outlined in the manual.
Items Included in the Box
Upon opening the Bosch GLM 20 Professional box, you’ll find the core device – the laser distance measurer itself. A practical wrist strap is included, enhancing portability and preventing accidental drops during use. Crucially, a quick start guide is provided, offering immediate assistance with initial setup and basic operations.
The manual details these components, ensuring users can verify all necessary items are present. Batteries are generally not included, requiring separate purchase for immediate functionality; Inspecting the contents against the manual’s list is recommended before first use.
Checking for Damage and Completeness
Before utilizing the Bosch GLM 20 Professional, carefully inspect the packaging for any signs of shipping damage. Once opened, examine the device itself for physical defects – cracks, dents, or laser aperture obstructions. Verify all listed components are present, referencing the ‘Items Included’ section of the manual.
Confirm the quick start guide and wrist strap are undamaged. If any issues are detected, immediately contact the retailer or Bosch support, referencing your purchase details and the manual’s troubleshooting section.
Safety Precautions
Always read the Bosch GLM 20 Professional manual before use. This Class 2 laser device requires caution; avoid direct eye exposure to the laser beam for safe operation.
General Safety Warnings
Prior to operating the Bosch GLM 20 Professional, thoroughly review the provided manual for comprehensive safety guidelines. Ensure the device is used only for its intended purpose – measuring distance, length, height, and calculating area/volume.
Never attempt to modify or disassemble the tool, as this could compromise its safety features and accuracy. Avoid using the device in damp or wet environments, and protect it from extreme temperatures. Always be aware of your surroundings and potential hazards while measuring.
Keep the device out of reach of children.
Laser Safety Information (Class 2 Laser)
The Bosch GLM 20 Professional utilizes a Class 2 laser (635nm, <1mW). Direct eye exposure to the laser beam can cause momentary discomfort and potential vision hazards. Avoid staring directly into the beam.
Do not point the laser beam at people or animals. The manual emphasizes the importance of using laser protection eyewear (accessory) when working outdoors or in bright sunlight to enhance visibility.
Never attempt to disassemble or modify the laser module, as this could increase the risk of harmful exposure.
Getting Started: Initial Setup
Initial setup for the Bosch GLM 20 Professional involves inserting batteries and familiarizing yourself with the device’s power button, as detailed in the manual.
Inserting Batteries
To insert batteries into the Bosch GLM 20 Professional, locate the battery compartment, typically on the device’s rear. Slide open the compartment cover, adhering to the indicated direction. Insert the specified batteries (usually AA) ensuring correct polarity – positive (+) and negative (-) terminals align with the markings inside the compartment.
Close the battery compartment cover securely until it clicks. The device’s manual emphasizes using only recommended battery types for optimal performance and to avoid potential damage. Always replace all batteries simultaneously for consistent operation.
Powering On and Off
To power on the Bosch GLM 20 Professional, press and hold the power button, typically marked with a power symbol. The device will initiate, displaying a self-test and readiness indicator. To power off, press and hold the same power button again for a few seconds until the display turns off completely.
The manual notes an auto-power off function after a period of inactivity to conserve battery life. This feature can be disabled or adjusted within the device settings, as detailed in the user guide.
Basic Measurement Functions
The Bosch GLM 20 excels at fundamental measurements: distance, length, and height. The manual details simple button presses for quick, accurate readings in various environments.
Measuring Distance
To measure distance with the Bosch GLM 20 Professional, as outlined in the manual, activate the device and select the desired unit of measurement. Aim the laser dot at the target surface, ensuring a clear line of sight. Press and hold the measurement button; the distance will display on the screen.
Release the button to lock the reading. Repeat for multiple measurements, utilizing the addition and subtraction functions for combined distances. The manual emphasizes stable aiming for accuracy.
Measuring Length
Measuring length with the Bosch GLM 20 Professional, per the manual, is similar to distance measurement. Activate the device, select units, and aim the laser at the target. Press and hold the measurement button to display the length. The manual suggests using the continuous measurement mode for longer distances, allowing dynamic tracking. Ensure a stable hold and clear laser visibility for precise results. Multiple length measurements can be added or subtracted for complex projects.
Advanced Measurement Functions
The Bosch GLM 20 Professional, as detailed in the manual, calculates area, volume, height, and inclination. These functions enhance versatility beyond simple distance readings.
Measuring Height
The Bosch GLM 20 Professional’s manual explains height measurement utilizes indirect calculation. Aim the laser at the top of the object, ensuring a clear line of sight. The device employs Pythagorean theorem for accurate results, compensating for angles.
Users should confirm the starting point is level for precision. The manual stresses proper technique, avoiding obstructions, and understanding the device’s limitations for reliable height determination. It’s crucial to read the manual thoroughly before attempting this function.
Measuring Inclination/Angle
The Bosch GLM 20 Professional, as detailed in its manual, measures inclination using integrated tilt sensors. Activate the angle measurement mode, then position the device against the surface. The display shows the angle in degrees. The manual emphasizes holding the device firmly for stable readings.
Accuracy depends on a stable surface and proper calibration. Users should consult the manual for troubleshooting inaccurate angle measurements and understanding potential error sources.
Calculating Area
The Bosch GLM 20 Professional’s manual explains area calculation is straightforward. Measure the length and width of the area. Select the area function on the device. Input the first measurement, then the second. The GLM 20 automatically calculates and displays the area in the selected units.
The manual advises verifying measurements for accuracy, especially in larger spaces. Consistent units are crucial for correct area results.
Calculating Volume
The Bosch GLM 20 Professional’s manual details volume calculation. First, measure the length, width, and height of the space. Access the volume function on the device. Input each dimension sequentially – length, then width, and finally height. The GLM 20 instantly computes and displays the volume in the chosen units.
The manual stresses confirming all measurements, ensuring accuracy for reliable volume determination.
Understanding the Display and Buttons
The Bosch GLM 20 Professional’s manual explains its display symbols and button functions. Clear indicators show units, battery life, and measurement modes for intuitive operation.
Display Symbols and Indicators
The Bosch GLM 20 Professional’s LCD screen utilizes several symbols for clear communication. A battery icon indicates remaining power, while unit symbols (m, ft, in) display the selected measurement system.
A Bluetooth symbol appears when connected wirelessly.
The manual details how a target symbol aids laser visibility, and various measurement mode icons (area, volume, indirect) signify active functions.
Error codes are also displayed using specific symbols, prompting troubleshooting. Understanding these indicators, as outlined in the manual, ensures efficient operation and accurate readings.
Button Functions Explained
The Bosch GLM 20 Professional features intuitive button controls. The power button activates/deactivates the device. A measurement button initiates distance readings.
Buttons facilitate unit selection (m, ft, in) and mode switching (single, continuous).
The manual details how the ‘+’ and ‘-’ buttons adjust settings and recall memory.
A dedicated button accesses memory functions for saving and retrieving measurements. Understanding each button’s function, as described in the manual, is crucial for maximizing the tool’s capabilities and achieving precise results.
Memory Functions
The Bosch GLM 20 Professional stores up to 50 measurement results. The manual explains how to save, recall, and delete data efficiently, aiding project documentation.
Saving Measurement Results
To save measurements on the Bosch GLM 20 Professional, as detailed in the manual, press the memory button. The device allows storing up to 50 values.
A numbered slot will appear on the display, prompting you to select a memory location. Confirm your choice with another button press.
This feature is invaluable for recording dimensions during site surveys, room calculations, or any project requiring multiple measurements;
The manual emphasizes regularly checking memory usage to avoid overwriting important data.
Recalling Saved Measurements
Retrieving stored data on the Bosch GLM 20 Professional is straightforward, according to the manual. Press the memory button repeatedly to cycle through the saved measurements.
Each press displays the next stored value, indicated by its corresponding memory slot number on the screen.
If you reach the end of the stored data, it will loop back to the beginning. The manual advises verifying the displayed slot number to ensure you’re viewing the correct measurement.
Deleting Measurement History
Clearing saved measurements on the Bosch GLM 20 Professional, as detailed in the manual, requires a specific procedure. First, enter the memory function. Then, continuously hold the ‘Delete’ button until all stored values are erased. The display will confirm the deletion process.
The manual cautions that this action is irreversible, so ensure you’ve backed up any crucial data before proceeding with a complete history wipe.
Units of Measurement
The Bosch GLM 20 Professional, per the manual, easily switches between meters, feet, and inches using the unit selection button for versatile measurements.
Switching Between Units (Meters, Feet, Inches)
The Bosch GLM 20 Professional’s manual details a simple unit change process. Press the unit button – identified by symbols for meters (m), feet (ft), and inches (in) – to cycle through the available measurement units.
Each press toggles to the next unit. The currently selected unit is clearly displayed on the device’s screen. This allows users to quickly adapt to different project requirements and preferences, ensuring accurate readings regardless of the desired measurement system. Confirm the correct unit is shown before taking measurements.
Technical Specifications
The Bosch GLM 20 Professional, as per its manual, operates between 10°C-45°C, stores at 20°C-70°C, with ≤90% humidity, utilizing a Class 2, 635nm laser.
Operating Temperature
According to the Bosch GLM 20 Professional manual, the device is designed for optimal performance within a specific temperature range. Its operational limits are defined as 10°C to 45°C (50°F to 113°F).
Operating outside this range may lead to inaccurate measurements or device malfunction. Maintaining the device within these parameters ensures reliable and consistent results. The manual stresses adherence to these specifications for prolonged device lifespan and accuracy, especially during demanding tasks.
Storage Temperature
The Bosch GLM 20 Professional manual specifies a storage temperature range of 20°C to 70°C (-4°F to 158°F). While the operating temperature is narrower, this broader range allows for safe storage in varied environments.
Avoid prolonged exposure to temperatures exceeding these limits, as it could potentially damage internal components. Proper storage, as outlined in the manual, contributes to the longevity and consistent functionality of the laser distance measurer.
Relative Humidity
The Bosch GLM 20 Professional manual details acceptable relative humidity levels for both operation and storage. The device functions reliably within a humidity range of up to 90% non-condensing.
Avoid using or storing the device in excessively humid environments, as condensation can form internally, potentially causing damage. Maintaining appropriate humidity, as per the manual’s guidelines, ensures optimal performance and extends the lifespan of your laser distance measuring tool.
Laser Class and Type
The Bosch GLM 20 Professional manual specifies the laser as Class 2, emitting a 635nm red laser beam with power less than 1mW. This classification indicates it’s safe for momentary viewing, but direct, prolonged exposure should be avoided. The manual emphasizes not staring into the laser beam and recommends using laser safety glasses for improved visibility in bright conditions. Understanding the laser type and class is crucial for safe and responsible operation.
Troubleshooting Common Issues
The Bosch GLM 20 Professional manual details error codes, power-on failures, and inaccurate measurements. Refer to it for solutions and ensure proper battery insertion.
Error Codes and Their Meanings
The Bosch GLM 20 Professional manual outlines specific error codes to aid in troubleshooting. For instance, a ‘C6’ error on Bosch boilers (like the L1P27-WBN 6000-24CRN S5500) often indicates a problem with the flue or blockage.
The manual details these codes, helping users diagnose issues quickly. Common problems include low battery, measurement out of range, or internal device errors. Always consult the manual for a complete list and recommended solutions to ensure accurate operation and prevent further complications.
Device Not Powering On
The Bosch GLM 20 Professional manual addresses the issue of the device failing to power on. First, verify the batteries are correctly inserted and have sufficient charge; replace if needed. Check the battery compartment for corrosion. If the issue persists, consult the manual’s troubleshooting section. Ensure the power button is fully depressed. A complete reset, as described in the manual for Bosch water heaters, might resolve internal glitches, though this isn’t directly applicable, it highlights a potential fix.
Inaccurate Measurements
The Bosch GLM 20 Professional manual details potential causes for inaccurate readings. Ensure a stable surface and a clear line of sight to the target. Reflective surfaces can interfere; the manual advises against measuring to them. Verify the correct unit of measurement is selected (meters, feet, inches). Environmental factors like extreme temperatures (10-45°C operating range) can affect accuracy. If problems continue, recalibration, as outlined in advanced manuals, might be necessary, though not directly detailed for this model.
Maintenance and Care
The Bosch GLM 20 Professional manual recommends cleaning with a soft, dry cloth. Replace batteries promptly when the low-battery indicator appears for optimal performance.
Cleaning the Device
According to the Bosch GLM 20 Professional manual, regular cleaning ensures accurate measurements and prolongs the device’s lifespan. Always disconnect the power source before cleaning. Use a soft, dry cloth to wipe the exterior housing, removing dust and debris.
Avoid using abrasive cleaners, solvents, or excessive moisture, as these can damage the device’s components. Do not immerse the GLM 20 in water. Pay particular attention to the laser lens, gently removing any smudges with a lens cleaning cloth. Ensure the device is completely dry before resuming operation.
Battery Replacement
The Bosch GLM 20 Professional manual details battery replacement procedures. The device requires 2 x 1.5V LR03 (AAA) batteries. To replace, locate the battery compartment on the device’s rear. Slide the compartment cover open and remove the used batteries, noting the correct polarity (+/-).
Insert new batteries, ensuring correct alignment. Close the battery compartment securely. Always dispose of used batteries responsibly, following local regulations. Low battery power is indicated on the display, prompting replacement for continued accurate operation.
Bosch GLM 20 Professional in China: Manufacturing Locations
The Bosch GLM 20 Professional, as detailed in supporting documentation, has manufacturing facilities within China. Specifically, Shanghai hosts several Bosch production bases. Shanghai Bosch Automotive Components Service Co., Ltd. is a key location. While the manual doesn’t explicitly detail where the GLM 20 is assembled, Bosch’s broader presence in China indicates likely production within these facilities.
This supports cost-effective manufacturing and distribution to global markets.
Bosch GLM 20 Professional: User Experience & Work Environment
The Bosch GLM 20 Professional’s manual highlights its suitability for both indoor and outdoor use, though optimal laser visibility requires laser glasses in bright sunlight. User experiences, as reported, vary from professional construction to home DIY projects. The device operates effectively within temperatures of 10°C to 45°C (50°F to 113°F), and storage ranges from -20°C to 70°C (-4°F to 158°F).
It’s a versatile tool for diverse work environments.
Finding ECU Models with Bosch Numbers
While the Bosch GLM 20 Professional manual doesn’t directly address ECU models, information suggests using a ‘f’ prefixed Bosch number for ECU identification. Methods include querying the Bosch repair website (https://www.bosch-repair) or utilizing specialized automotive databases. This process helps pinpoint the exact ECU model based on the Bosch part number. However, this is unrelated to the laser distance measurer’s functionality detailed in its user guide.
Bosch Boiler Error Codes (Example: C6)
The Bosch GLM 20 Professional manual provides no information regarding boiler error codes like ‘C6’. Error C6 in Bosch boilers typically indicates issues with the flue or external blockage. Troubleshooting involves checking the flue’s installation and ensuring it’s unobstructed. This is entirely separate from the laser distance measurement functions and setup instructions detailed within the GLM 20’s documentation, focusing on a different Bosch product line.
Resetting a Bosch Water Heater
The Bosch GLM 20 Professional manual doesn’t cover water heater resets. To reset a Bosch water heater, disconnect the power supply – either switch it off or unplug it. Wait a short period, then restore power. This process isn’t related to the laser distance measurer’s functions, battery insertion, or measurement techniques described in the GLM 20’s guide; Water heater procedures are specific to that appliance, not the GLM 20.