Bosch GRL4000-80CH / GRL4000-80CHV Rotary Laser Level
Operating/Safety Instructions
Modèles : GRL4000-80CH, GRL4000-80CHV, RC5
Read Before Using | Lire avant usage | Leer antes de usar
Important Safety Information
WARNING: Read all instructions. Failure to follow all instructions listed below may result in hazardous radiation exposure, electric shock, fire and/or serious injury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE.
The term "tool" in all warnings refers to your mains-operated (corded) or battery-operated (cordless) tool.
Laser Safety
- This tool produces Class 2 laser radiation (<1 mW @ 635 nm).
- DO NOT STARE INTO BEAM.
- Do not direct the laser beam at persons or animals and do not stare into the laser beam yourself. This can lead to blindness.
- DO NOT remove or deface any warning or caution labels. Removing labels increases the risk of exposure to laser radiation.
- Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
- Always make sure that any bystanders are aware of the dangers of looking directly into the laser tool.
- DO NOT place the laser tool in a position that may cause anyone to stare into the laser beam intentionally or unintentionally. Serious eye injury could result.
- DO NOT use the laser viewing glasses (52) as safety goggles. They improve visualization but do not protect against laser radiation.
- DO NOT use the laser viewing glasses as sunglasses or in traffic. They do not afford complete UV protection and reduce color perception.
- DO NOT use any optical tools such as telescopes or transits to view the laser beam. Serious eye injury could result.
- If the glass light house breaks when dropped, broken glass can cause laceration hazard and unit to lose its IP rating. Contact customer service immediately.
Electrical Safety
- Batteries can explode or leak, cause injury or fire. Always follow all instructions and warnings on the battery label and package.
- DO NOT expose the laser tool and battery to rain or wet conditions.
- DO NOT short any battery terminals.
- DO NOT charge alkaline batteries.
- DO NOT mix old and new alkaline batteries. Replace all of them at the same time with new batteries of the same brand and type.
- DO NOT mix battery chemistries.
- Dispose of or recycle batteries per local code.
- DO NOT dispose of batteries in fire. Keep batteries out of reach of children.
- Remove batteries if the device will not be used for several months.
Personal Safety
- Stay alert, watch what you are doing and use common sense when operating a tool. Do not use a tool while tired or under the influence of drugs, alcohol or medication.
- If laser radiation strikes your eye, deliberately close your eyes and immediately turn your head away from the beam.
- Do not make any modifications to the laser equipment.
Work Area Safety
- Keep work area clean and well lit. Cluttered or dark areas invite accidents.
- Use safety equipment. Always wear eye protection. Safety equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
- DO NOT operate the laser tool around children or allow children to operate the laser tool. Serious eye injury could result.
- Use caution when using laser tools in the vicinity of electrical hazards.
- DO NOT use laser tools, attachments and accessories outdoors when lightning conditions are present.
- Do not operate the laser tool in explosive environments, such as in the presence of flammable liquids, gases or dusts.
Magnets
- Keep the tool, wall mount, laser receiver, and laser target plate away from cardiac pacemakers. The magnets can impair the function of pacemakers.
- Keep the tool, wall mount, laser receiver, and laser target plate away from magnetic data medium and magnetically-sensitive equipment. The effect of the magnets can lead to irreversible data loss.
Features
The numbering of the product features shown refers to the illustration of the tool on the graphic pages.
Rotary Laser (GRL4000-80CH / GRL4000-80CHV)
- (1) Rotary laser
- (2) Battery compartment cover
- (3) Slope button down / Button for clockwise rotation
- (4) Slope button up / Button for anticlockwise rotation
- (5) Line operation button
- (6) Rotational operation button
- (7) Bluetooth® button
- (8) Variable laser beam
- (9) Laser beam outlet aperture
- (10) Upwards plumb point (GRL4000-80CHV only)
- (11) On/off button
- (12) Status indicator
- (13) Manual operation button
- (14) Slope button
- (15) Display
- (16) Tripod mount 5/8" (horizontal)
- (17) Carrying handle
- (18) Notch for orientation
- (19) Laser warning label
- (20) Tripod mount 5/8" (vertical)
- (21) Serial number
- (22) Recess for Bluetooth® localization module
- (23) Battery adapter
- (24) Release button for rechargeable battery/battery adapter
- (25) Rechargeable battery
Rotary Laser Indicator Elements
- (a) Laser operating mode indicator
- (b) Bluetooth® connection indicator
- (c) Shock-warning function indicator
- (d) Battery charge indicator for rechargeable battery/non-rechargeable batteries
- (e) Plumb point function indicator (downwards)
- (f) X-axis slope angle indicator
- (g) Y-axis slope angle indicator
- (h) Rotational speed indicator
- (i) Softkey symbols
Remote Control (RC5)
- (26) Plumb point function button (downwards)
- (27) Rotational operation button
- (28) Sleep mode button
- (29) Line operation button
- (30) Button for anticlockwise rotation
- (31) Slope button, up
- (32) Slope button
- (33) Signal transmission indicator
- (34) X-axis status indicator
- (35) Y-axis status indicator
- (36) Slope button, down
- (37) Button for clockwise rotation
- (38) Battery compartment cover locking mechanism
- (39) Serial number
- (40) Battery compartment cover
- (41) Remote control
Accessories/Replacement Parts
- (42) Laser receiver
- (43) Measuring rod
- (44) Tripod
- (45) Wall mount/alignment unit
- (46) Wall mount fastening screw
- (47) Wall mount fixing holes
- (48) Push button for coarse adjustment of the wall mount
- (49) Wall mount fine adjustment screw
- (50) 5/8" wall mount screw
- (51) Magnet
- (52) Laser viewing glasses
- (53) Laser target plate
- (54) Case
- (55) Bluetooth® localization module
A) Accessories shown or described are not included with the product as standard.
Technical Specifications
| Specification | GRL4000-80CH | GRL4000-80CHV |
|---|---|---|
| Article number | 3 601 K61 J10 | 3 601 K61 F10 |
| Working range (Diameter) | approx. 200 ft (approx. 60 m) | approx. 200 ft (approx. 60 m) |
| Working range (Diameter) with laser receiver | approx. 4000 ft (approx. 1200 m) | approx. 4000 ft (approx. 1200 m) |
| Leveling Accuracy 1) 2) Horizontal | 1/16 in @ 100 ft (1.5 mm/30m ) | 1/16 in @ 100 ft (1.5 mm/30m ) |
| Leveling Accuracy 1) 2) Vertical | n/a | 1/8 in @ 100 ft (3 mm/30m) |
| Self-leveling range (typical) | 8.5% (5°) | 8.5% (5°) |
| Scan angle for line operation | n/a | 0°/10°/25°/50° |
| Leveling duration at a slope of up to 3% | 30s | 30s |
| Rotational speed | 600 min⁻¹ | 150/300/600 min⁻¹ |
| Singe/dual-axis slope operation | n/a | 8.5% |
| Accuracy of single-axis slope operation B) | n/a | 0.2% |
| Max. altitude | 6560 ft (approx. 2000 m) | 6560 ft (approx. 2000 m) |
| Relative air humidity max. | 90% | 90% |
| Laser class | 2 | 2 |
| Laser type | 635 nm, <1 mW | 635 nm, <1 mW |
| Divergence of laser line | <1.5 mrad (full angle) | <1.5 mrad (full angle) |
| Recommended laser receiver | LR40 | LR40 |
| Tripod mount (horizontal/vertical) | 5/8 in-11 | 5/8 in-11 |
| Laser level power supply | 18 V | 18 V |
| Power Supply Rechargeable battery pack (Li-ion) | Bosch GBA18V40, GBA18V80 | Bosch GBA18V40, GBA18V80 |
| Power Supply Non-rechargeable batteries (alkaline manganese) (with battery adapter) | 4 x 1.5V LR20 (D) | 4 x 1.5V LR20 (D) |
| Approx. operating time with Lithium Ion (or rechargeable) battery (4 Ah) | 60 h | 60 h |
| Approx. operating time with non-rechargeable batteries | 70 h | 70 h |
| Bluetooth® laser level Class | 1 Bluetooth® 5.0/4.X (Low Energy)E) | 1 Bluetooth® 5.0/4.X (Low Energy)E) |
| Bluetooth® laser level Compatibility | Android 6, iOS 10 (and above) | Android 6, iOS 10 (and above) |
| Bluetooth® laser level Max. signal range | 328 ft (100 m)F) | 328 ft (100 m)F) |
| Bluetooth® laser level operating frequency range | 2402–2480 MHz | 2402–2480 MHz |
| Bluetooth® laser level Max. transmission power | 6.3 mW | 6.3 mW |
| Bluetooth® smartphone Compatibility | Android 6, iOS 10 (and above) | Android 6, iOS 10 (and above) |
| Bluetooth® smartphone Operating system | Android 6, iOS 10 (and above) | Android 6, iOS 10 (and above) |
| Specification | GRL4000-80CH / GRL4000-80CHV |
|---|---|
| Weight according to EPTA-Procedure 01:2014 with rechargeable battery G) | 9.3-10.6 lb (4.2-4.8 kg) |
| Weight according to EPTA-Procedure 01:2014 with non-rechargeable batteries | 10 lb (4.6 kg) |
| Dimensions (length width height) | 12.8 x 7.4 x 11 in (327 188 278 mm) |
| Protection rating | IP 68 |
| If mounted on a tripod, drop-proof to a height of | 6 ft (2 m) |
| Recommended ambient temperature during charging | 32 °F ~ 95 °F (0 °C to +35 °C) |
| Permitted ambient temperature during operation H) | 14 °F ~ 122 °F (10 °C to +50 °C) |
| Permitted ambient temperature during storage | -4 °F ~ 122 °F (20 °C to +50 °C) |
| Batteries | Bosch GBA18V40, GBA18V80; 4 x 1.5V LR20 (D) |
| Chargers | Bosch GAL18V40 |
| Specification | RC5 Remote Control |
|---|---|
| Article number | 3 601 K69 R10 |
| Working range (radius) | 300 ft (100 m) |
| Operating temperature | 14 °F ~ 122 °F (10 °C to +50 °C) |
| Storage temperature | -4 °F ~ 158 °F (20 °C to +70 °C) |
| Max. altitude | 6560 ft (approx. 2000 m) |
| Relative air humidity max. | 90% |
| Pollution degree according to IEC 61010-1 | 2A) |
| Bluetooth® remote control Class | 1 Bluetooth® 5.0/4.X (Low Energy)B) |
| Bluetooth® remote control Compatibility | Android 6, iOS 10 (and above) |
| Bluetooth® remote control Max. signal range | 328 ft (100 m)C) |
| Bluetooth® remote control Operating frequency range | 2402–2480 MHz |
| Bluetooth® remote control Max. transmission power | 6.3 mW |
| Batteries | 2 x 1.5 V LR6 (AA) |
| Weight according to EPTA-Procedure 01:2014 | 0.37 lb (0.17 kg) |
| Dimensions (length width height) | 4.8 x 2.3 x 1 in (122 59 27 mm) |
| Protection rating | IP 54 |
A) Only non-conductive deposits occur, whereby occasional temporary conductivity caused by condensation is expected.
B) When using Bluetooth® Low Energy devices, it may not be possible to establish a connection depending on the model and operating system. Bluetooth® devices must support the SPP profile.
C) The signal range may vary greatly depending on external conditions, including the receiving device used. The Bluetooth® range may be significantly weaker inside closed rooms and through metallic barriers (e.g. walls, shelving units, cases, etc.).
Intended Use
Rotary Laser: The laser level is intended for establishing and checking exactly horizontal height profiles, vertical lines, alignments and plumb points. The laser level is suitable for indoor and outdoor use.
Remote Control: The remote control is intended for controlling the Bosch rotary lasers via Bluetooth®. The remote control is suitable for indoor and outdoor use.
Assembly and Power Supply
Laser Level Power Supply
The laser level can be operated either with conventional non-rechargeable batteries or with a Bosch lithium-ion battery. Do not use any commercially available rechargeable batteries (e.g. nickel metal hydride).
Operation with Bosch Rechargeable Lithium-ion Battery Pack
- Use only Bosch rechargeable lithium-ion battery packs listed in the technical data section. Use of other battery packs may increase the risk of fire, personal injury and property damage.
- The battery pack is supplied partially charged. To ensure full capacity, completely charge the battery pack before first use.
- Use only Bosch chargers listed in the technical data section. Use of other chargers may increase the risk of fire, personal injury and property damage.
- The lithium-ion battery pack can be charged at any time without reducing its service life.
- The "Electronic Cell Protection (ECP)" protects the lithium-ion battery pack against deep discharging. When the battery pack is discharged, the laser tool is switched off by a protective circuit. Do not switch the laser level back on after it has been switched off by the protective circuit, as this can damage the battery.
Battery Charge Indicator (Rechargeable Battery)
If the rechargeable battery is removed, its state of charge may be indicated by the green LEDs on the battery. Press the button for the battery charge indicator to show the state of charge.
If no LED lights up after pressing the button, the battery is defective and must be replaced.
| LEDs | Capacity |
|---|---|
| 5 continuous green light | 80-100 % |
| 4 continuous green light | 60-80 % |
| 3 continuous green light | 40-60 % |
| 2 continuous green light | 20-40 % |
| 1 continuous green light | 5-20 % |
| 1 flashing green light | 0-5 % |
Recommendations for Optimal Handling of the Battery
- Protect the battery against moisture and water.
- Store the battery within a temperature range of -20 to 50 °C.
- Occasionally clean the ventilation slots on the battery using a soft brush that is clean and dry.
- A significantly reduced operating time after charging indicates that the battery has deteriorated and must be replaced.
- Follow the instructions on correct disposal.
Operation with Non-Rechargeable Batteries, LR20 (D)
- It is recommended to use alkaline manganese batteries.
- Put the batteries into the battery adapter (23). Make sure that the polarity is correct and corresponds to the diagram on the battery adapter.
- The battery adapter is intended only for use in designated Bosch laser levels and must not be used with power tools.
- Always replace all batteries at the same time. Only use batteries from the same manufacturer and which have the same capacity.
- Take the batteries out of the laser level when not using it for a prolonged period. Batteries can corrode and self-discharge during prolonged storage.
Changing the Batteries/Rechargeable Battery (see figure A)
To replace the batteries/rechargeable battery, move the locking mechanism (2) of the battery compartment cover into position and open the battery compartment cover (1). Insert either a charged rechargeable battery (25) or the battery adapter (23) with fitted batteries into the battery compartment until it clicks into place. To remove, press the release button (24) and pull the battery/adapter out. Close the battery compartment cover (1) and move the locking mechanism (2) into position.
Battery Charge Indicator (Non-Rechargeable Batteries)
The battery charge indicator (d) on the display will indicate the state of charge:
| Indicator | Capacity |
|---|---|
| (d) fully lit | 60 - 100% |
| (d) half lit | 30 - 60% |
| (d) quarter lit | 5 - 30% |
| (d) not lit | 0 - 5% |
If batteries are empty, a warning message will appear, and the status display (12) will flash red quickly. The laser level will then switch itself off.
Remote Control Power Supply
Using alkali-manganese batteries is recommended. Turn the locking mechanism (38) of the battery compartment cover, open the battery compartment cover (40) and insert the batteries, ensuring correct polarity. Close the cover and secure the locking mechanism.
Remove batteries from the remote control when not using it for longer periods to prevent energy consumption by the Bluetooth® function.
Operation
Protect the laser level and remote control against moisture, direct sunlight, and extreme temperatures or variations in temperature. Allow the laser level to adjust to ambient temperature before operation after significant temperature changes.
Accuracy Check: Always perform an accuracy check before continuing work if the laser level has been subjected to severe external influences (see "Accuracy Check of the Laser level", page 28).
Starting Operation of the Remote Control
The remote control works only if fitted with sufficiently charged batteries. After pressing a button, the operation indicator (33) will light up, indicating a signal has been sent. It is not possible to switch the laser level on/off with the remote control.
Starting Operation of the Rotary Laser
Setting up the Laser Level
Position the laser level on a stable surface, mount it on a tripod (44) or on the wall mount (45). Due to its high leveling accuracy, the laser level is very sensitive to knocks and vibrations. Ensure the laser level is stable to avoid interruptions caused by re-leveling.
Operating the Laser Level
Main functions are controlled by buttons on the laser level and remote control (41). Additional functions are available via the remote control, laser receiver (42), or the Bosch Leveling Remote App.
- Display (15): Shows current settings and softkey symbols (i) for menu functions. Softkey symbols indicate usable function buttons or additional functions like Next (➡️), Back (⬅️), or Confirm (✅). They also indicate the function of the Slope buttons (3, 4) for sloping up (⬆️) or down (⬇️), or rotating clockwise (?) or anticlockwise (↩️).
- The display automatically returns to the start screen five seconds after the last button press. The display lights up with every button press or signal and goes out approximately one minute after the last press.
- Tilting or rotation can be accelerated by holding down the respective buttons.
- All functions reset to standard settings when the laser level is switched off.
Switching On and Off
To Switch On: Press the on/off button (11). The start screen appears, followed by the home screen. The laser level emits the variable laser beam (8) and the plumb beam up (10) (GRL4000-80CHV only). Leveling starts automatically, indicated by flashing indicators. Once leveling is complete, beams light up continuously, rotation starts, and the status indicator (12) lights up green continuously.
Safety Note: Do not point the laser beam at persons or animals and do not look into the laser beam yourself, not even from a large distance.
To Switch Off: Press and hold the on/off button (11) until the switch-off symbol appears. Do not leave the switched-on tool unattended.
Overheating: If the maximum operating temperature (50 °C) is exceeded, a warning message appears, and the status display (12) flashes red. The laser level shuts down to protect the laser diode. It becomes operational again after cooling down.
Establishing a Connection to the Remote Control/Laser Receiver
In default factory setting, the laser level, remote control (41), and laser receiver (42) are already connected via Bluetooth®. To reconnect:
- On the laser level, press and hold the Bluetooth® button (7) until the connection indicator appears on the display.
- For Remote Control: Press and hold the anticlockwise rotation button (30) and clockwise rotation button (37) on the remote control simultaneously for five seconds. Status indicators (34, 35) on the remote control will alternately flash green.
- For Laser Receiver: Press the X-axis and Y-axis buttons on the laser receiver simultaneously for five seconds (refer to the laser receiver's operating instructions).
- Confirmation appears on the display. Status indicator (12) on the laser level and indicators (34, 35) on the remote control light up green for three seconds upon successful connection.
- If connection fails, an error message appears, and status indicator (12) on the laser level lights up red for three seconds (similarly for remote control indicators).
- Two laser receivers can work with the laser level simultaneously. Connecting new devices may delete the oldest connection.
Remote Control via the Bosch Leveling Remote App
The laser level is equipped with a Bluetooth® module for remote control via a smartphone. The Bosch Leveling Remote App is required (downloadable from app stores). System requirements are available at www.boschpt.com.
- To Switch On Bluetooth® for App Control: Briefly press the Bluetooth® button (7). The connection indicator appears on the display. Ensure Bluetooth® is activated on your mobile device. Connection is confirmed on the display. The Bluetooth® connection indicator (b) shows the active connection.
- Safety Note: Do not turn on the laser remotely using the app without line of sight. The sudden bright laser beam may increase the risk of personal injury or property damage. Ensure no bystanders are in the path of the laser beam before turning on remotely.
- Connection Issues: If no connection is established, an error message appears. Poor reception conditions can cause time delays. Another connection attempt will automatically begin if the connection is interrupted.
- To Switch Off Bluetooth®: Press the Bluetooth® button (7). The indicator for a terminated connection appears, and the Bluetooth® connection indicator (b) goes out.
Sleep Mode
During breaks, the tool can be set to sleep mode, saving all settings. Press the on/off button (11) briefly to enter the menu, navigate to sleep mode, and confirm with the slope button (14). Alternatively, press the sleep mode button (28) on the remote control or app.
- Safety Note: Do not switch off sleep mode remotely without line of sight. Ensure no bystanders are in the path of the laser beam before turning off sleep mode remotely.
- When sleep mode is on, the sleep mode symbol appears on the display, and the status indicator (12) slowly flashes green. The shock-warning function remains activated.
- To Switch Off Sleep Mode: Briefly press the on/off button (11) on the measuring tool or press the sleep mode button (28) on the remote control. You can also switch off the measuring tool completely by pressing and holding the on/off button (11) for an extended period.
Locking the Keyboard
The keyboard of the laser level and remote control can be locked via the Bosch Leveling Remote App. The keyboard lock indicator will appear on the laser level's display.
To Unlock: Use the Bosch Leveling Remote App, switch the laser level on/off via the on/off button (11), or press the slope buttons (3) and (4) simultaneously.
Operating Modes
All three operating modes are possible in horizontal and vertical positions.
Rotational Operation
Recommended when using the laser receiver. For GRL4000-80CHV, different rotational speeds can be selected.
- GRL4000-80CHV: Default speed is 300 min⁻¹. Change speed by pressing the rotational operation button (6) or (27) until the required speed is indicated. Higher speeds are recommended with the laser receiver.
- GRL4000-80CH: Default speed is 600 min⁻¹. Speed adjustment is not possible.
- When not using the laser receiver, reduce rotational speed for improved visibility and use laser goggles (52).
Line Operation / Point Operation (GRL4000-80CHV only)
The variable laser beam moves within a defined aperture angle for increased visibility. Select by pressing the line operation button (5) or (29). Change aperture angle by repeatedly pressing the button until the desired mode is shown. Pressing again cycles back to rotational operation.
Note: Line and point operation are not suitable for use with the laser receiver (42).
Note: Due to inertia, the laser may slightly move beyond the end point of the laser line.
Turning the Line/Point within the Rotational Plane (GRL4000-80CHV only)
In line and point operation, the laser line or point can be positioned within the rotational plane (360°). Use slope buttons (4) or (3) on the tool, or (30) or (37) on the remote control to rotate anticlockwise (↩️) or clockwise (?).
Turning the Rotational Plane when in the Vertical Position (GRL4000-80CHV only)
In the vertical position, the laser point, line, or rotational plane can be rotated around the Y-axis within a range of ±8.5% for easy sighting or parallel alignment. Press the slope button (14) on the tool or (32) on the remote control to start. Use buttons (4)/(3) or (31)/(36) to adjust the position.
Automatic Plumb Point Function in the Vertical Position (GRL4000-80CHV only)
The laser beam can be automatically aligned vertically downwards for plumbing. Press the plumb point function button (26) on the remote control to start. The plumb point function symbol appears while aligning. The plumb point function indicator (e) appears on the start screen upon successful alignment.
Center Line Mode
The laser level automatically attempts to align the laser beam to the center line of the laser receiver by moving the rotation head. This mode is started at the laser receiver (refer to its operating instructions). During the search, the center line mode indicator appears on the laser level display, and the status indicator (12) flashes red. If alignment is successful, the mode finishes, and the set slope values are shown. If alignment fails, an error message appears.
Mask Mode
In rotational operation, individual quadrants of the rotational plane can be switched off to limit laser beam risks or avoid interference. This function is controlled via the Bosch Leveling Remote App. The laser operating mode indicator (a) shows visible quadrants.
Functions
Automatic Leveling
After switching on, the laser level automatically levels out unevenness within approx. ±8.5% (approx. 5°). The leveling indicator flashes during leveling, along with status indicators (12, 34, 35) flashing green. Rotation stops until leveling is complete. Beams light up continuously, rotation starts, and status indicators light up green continuously upon success.
- If the laser level is at a slant of more than 8.5%, leveling is not possible. An error message appears, and the status display (12) flashes red. Reposition the laser level and wait for it to relevel.
- If maximum leveling time is exceeded, leveling is discontinued with an error message. Reposition the laser level and briefly press the on/off button (11) to restart.
Position Changes
The laser level continuously checks its position. Re-leveling is automatic if position changes occur.
- Minimal position changes are leveled out without interrupting operation, compensating for vibrations or weather influences.
- Larger position changes stop rotation to avoid faulty measurements. Beams flash, the leveling indicator appears, and the shock-warning function may activate.
- The GRL4000-80CHV automatically detects horizontal or vertical position. To change, switch off, reposition, and switch on again. Changing position without switching off results in an error message and flashing red status display (12). Press on/off button (11) to restart leveling.
Shock-Warning Function
The shock-warning function is switched on automatically approximately 30 seconds after the laser level is switched on. The shock-warning indicator (c) lights up continuously.
- Shock Warning Actuated: If the position changes or a severe knock is registered, the laser stops rotating, an error message appears, the status display (12) flashes red, and a warning signal sounds. Confirm the warning message with the slope button (14) or (32). Levelling restarts automatically.
- Switching Off the Shock-Warning Function: On the home screen, the current setting is shown with indicator (c). To switch off/on, briefly press the on/off button (11), navigate to the setting, and confirm with the slope button (14).
Slope Operation in the Horizontal Position
In horizontal position, the X-axis and Y-axis can be tilted independently (±8.5%).
- To tilt the X-axis, press the slope button (14) or (32). Use buttons (4)/(3) or (31)/(36) to set the slope. Pressing both slope buttons simultaneously resets the slope to 0.00%.
- To tilt the Y-axis, press the slope button (14) or (32) again. Set the slope as for the X-axis.
- The required slope is implemented a few seconds after the last button press. The laser beam and slope symbol flash. The set slope values appear on the start screen, and the status indicator (12) lights up red continuously.
Manual Operation
Automatic leveling can be switched off for manual operation.
- Horizontal Position: Axes can be tilted independently (±8.5%). Press the manual operation button (13) to switch off automatic leveling for one or both axes. The status indicator (12) lights up red continuously if at least one axis is in manual mode. Remote control buttons (31, 36) or tool buttons (4, 3) can change the slope.
- Vertical Position (GRL4000-80CHV only): The X-axis can be manually tilted (±8.5%). The Y-axis cannot be leveled in vertical position. Press the manual operation button (13) to switch off automatic leveling for the X-axis. Use slope buttons (4)/(3) or (31)/(36) to tilt the X-axis. Pressing slope button (14) again allows rotation of the Y-axis.
Accuracy Check of the Laser Level
Note: Accuracy checks and calibration should only be performed by trained persons. Legal requirements must be known.
Influences on Accuracy: Ambient temperature, especially temperature differences from the ground upwards, can refract the laser beam. Mount the laser level on a tripod for distances of 65.6 ft (20 m) or more, preferably in the center of the work surface. Device-specific influences (e.g., falls) can also cause deviations. Always check leveling accuracy before beginning work.
Checking the Leveling Accuracy in a Horizontal Position
Requires a 100 ft (30 m) measuring distance on firm ground in front of a wall.
- Mount the laser level horizontally on a tripod 100 ft from a wall. Switch it on.
- Mark the center of the laser beam on the wall (point I).
- Rotate the laser level 180° without changing its position. Allow it to level in and mark the center point of the laser beam on the wall (point II), preferably vertically above or below point I.
- The discrepancy 'd' between points I and II reveals the actual height deviation.
- Repeat for the other axis by turning the laser level 90° before measurement.
Maximum Permitted Deviation: For a 100 ft (30 m) distance, the discrepancy 'd' must be no more than 1/8 in (3 mm) for each axis.
Checking the Leveling Accuracy in the Vertical Position (GRL4000-80CHV only)
Requires a 30 ft (10 m) tall wall and a plumb line.
- Position the laser level vertically on a firm, level surface. Switch it on and allow it to level in.
- Set up the laser level so the laser beam meets the plumb line at the exact center of the upper end.
- Mark the center of the laser beam on the wall at the lower end of the plumb line (point I).
- Rotate the laser level 180°. Allow it to level in and mark the center point of the laser beam on the wall (point II), preferably vertically above or below point I.
- The discrepancy 'd' between points I and II reveals the deviation from the vertical.
Maximum Permitted Deviation: For a 30 ft (10 m) distance, the discrepancy 'd' must be no more than 3/64 in (1 mm).
Calibrating the Laser Level
Note: Calibration should be performed with extreme precision or by a Bosch customer service agent. Inaccurate calibration leads to incorrect measuring results. Check leveling accuracy after every calibration.
X-axis and Y-axis Calibration (Horizontal Position)
Requires the laser receiver LR40 and a Bluetooth® connection.
- Preparation: Mount the laser level horizontally 100 ft (30 m) or 50 ft (15 m) from the laser receiver on a tripod or firm surface. Secure the laser receiver at the correct height (e.g., to a wall or measuring rod).
- Alignment: Align the laser level so the "+" side of the X-axis indicator points to the laser receiver (X-axis perpendicular to receiver).
- Start Calibration: Via Bosch Leveling Remote App or by pressing the on/off button and center line mode button on the laser receiver simultaneously. Select the distance between the tool and receiver on the tool's display and confirm.
- X-axis Calibration: Confirm rotation with slope button (14) when prompted to align the "+" side. Rotate the tool 180° to align the "-" side and confirm. "XOK" appears on the receiver display upon success.
- Y-axis Calibration: Rotate the tool 90° so the "+" side of the Y-axis points at the receiver and confirm. Rotate 180° to align the "-" side and confirm. "YOK" appears on the receiver display upon success.
- Finish: Confirm the final calibration with the slope button (14). The tool shuts down automatically.
Error Message: If calibration fails ("ERR" on receiver), cancel, check alignment, and restart. If it fails again, contact Bosch customer service.
Z-axis Calibration (Vertical Position - GRL4000-80CHV only)
Requires a 30 ft (10 m) wall and a plumb line.
- Preparation: Position the measuring tool vertically on a firm surface and allow it to level in. Align the laser beam perpendicular to the wall and cuts through the plumb line.
- Start Calibration: Press and hold the slope button (14) and briefly press the on/off button (11). Allow the tool to level in.
- Alignment: Align the laser beam parallel to the plumb line using the slope buttons (4)/(3).
- Save Calibration: Confirm with the slope button (14). The Z-axis indicator appears on the display, and the status indicator (12) flashes green three times. The device shuts down.
Error Message: If calibration fails, cancel, ensure the reference vertical line is in the pivoting range, and restart. If it fails again, contact Bosch customer service.
Working Advice
- Marking: Use only the center of the laser point or line. The size of the point/width of the line changes with distance.
- Laser Target Plate (53): Improves visibility in unfavorable conditions and at greater distances. The reflective half enhances visibility; the transparent half allows seeing the line from behind.
- Tripod (Accessory, 44): Offers stable, height-adjustable support. Use 5/8" tripod mounts (16, 20). Roughly align the tripod before switching on the laser level.
- Laser Goggles (Accessory, 52): Filter ambient light, making the laser beam appear brighter. Do not use as protective goggles, sunglasses, or while driving.
- Wall Mount and Alignment Unit (45): Secure to a wall using screws (46) or a wall strip. Fit perpendicularly and stably. Use the alignment unit for height adjustment (coarse with button 48, fine with screw 49).
- Measuring Rod (Accessory, 43): Recommended with the laser receiver for checking levels or applying slopes. A relative measuring scale allows reading deviations from target height.
- Example Applications:
- Projecting/Checking Heights: Position laser horizontally. Set beam at required height. Project or check height at target location. Without a tripod, determine height difference using the target plate (53).
- Parallel Alignment of Plumb Beam/Projecting Right Angles: For right angles or aligning partition walls, align the plumb beam (10) parallel to a reference line. Set the laser level vertically. Measure clearance between plumb beam and reference line at the laser level and at a distance. Align to ensure equal clearance. The variable laser beam (8) indicates the right angle.
- Indicating a Perpendicular/Vertical Plane: Set the laser level vertically. Align the plumb beam (10) with a reference line. The perpendicular plane is indicated by the variable laser beam (8).
- Aligning a Perpendicular/Vertical Plane: In vertical position, align the vertical laser line or rotational plane with a reference point. Use the Y-axis rotation function for precise alignment.
- Working without the Laser Receiver: Possible under favorable light conditions (dark environment) and short distances. Select line or point operation.
- Working with the Laser Receiver (42): Use in unfavorable lighting (bright environment, direct sunlight) and for larger distances. Select rotational operation with the highest rotational speed.
- Working Outdoors: Always use the laser receiver (42). Mount the laser level on a tripod. Always work with the shock-warning function activated.
- Setting up Formwork: Mount laser horizontally on a tripod outside the formwork area. Select rotational operation. Secure the laser receiver (42) to a measuring rod (43) and position it at test locations on the formwork. Adjust formwork height until the laser beam is indicated as "centered" at all locations.
- Checking Slopes: Mount laser horizontally on a tripod. Align the X-axis with the slope. Set the target slope for the X-axis. Secure the laser receiver (42) to a measuring rod (43) at the base of the slope. Align receiver height so the beam is "centered". Position the measuring rod at different test locations on the slope. If the slope is correct, the beam will be "centered" at all locations.
Overview of Status Indicators
Measuring Tool Indicators
| Indicator | Function | Status | Meaning |
|---|---|---|---|
| Status Indicator (12) | Leveling Process | Green flashing | Horizontal: X- or Y-axis leveling. Vertical: X-axis leveling. |
| Operation Status | Green continuous | Horizontal: Both axes leveled. Vertical: X-axis leveled. | |
| Status Indicator (12) | Error / Shutdown | Red flashing | Automatic shut-down due to error (e.g., empty battery, temp. exceeded). |
| Center Line Mode | Red flashing | Center line mode started (see receiver instructions). | |
| Position Change | Red flashing quickly | Position changed without switching on/off. | |
| Leveling Limit | Red flashing | Self-leveling not possible, end of range. | |
| Status Indicator (12) | Shock Warning | Red flashing quickly | Shock-warning function actuated. |
| Calibration | Red continuous | Measuring tool is being calibrated. | |
| Status Indicator (12) | Manual Operation | Red continuous | Horizontal: At least one axis tilted/manual. Vertical: X-axis tilted/manual. |
| Sleep Mode | Green flashing slowly | Sleep mode activated. |
Remote Control Indicators
| Indicator | Function | Status | Meaning |
|---|---|---|---|
| X-axis Indicator (34) | Leveling Process | Green flashing | X-axis leveling (horizontal & vertical). |
| Leveled | Green continuous | X-axis leveled (horizontal & vertical). | |
| X-axis Indicator (34) | Manual Operation / Tilted | Red continuous | X-axis tilted or in manual operating mode (horizontal & vertical). |
| Y-axis Indicator (35) | Leveling Process | Green flashing | Y-axis leveling (horizontal). |
| Leveled | Green continuous | Y-axis leveled (horizontal). | |
| Y-axis Indicator (35) | Manual Operation / Tilted | Red continuous | Y-axis tilted or in manual operating mode (horizontal). |
| Bluetooth® Indicator (33) | Connection Process | Green flashing alternately (34 & 35) | Remote control connecting via Bluetooth®. |
| Connected | Green continuous | Remote control successfully connected via Bluetooth®. | |
| Bluetooth® Indicator (33) | Connection Failed | Red continuous | Unsuccessful connection to measuring tool via Bluetooth®. |
Overview of Control Options
This table summarizes which functions can be controlled by the laser level, remote control (RC5), laser receiver (LR40), or the Bosch Leveling Remote App.
| Function | GRL4000-80CH | GRL4000-80CHV | RC5 | LR40 | Bosch Leveling Remote App |
|---|---|---|---|---|---|
| Switching on/off | ✅ | ✅ | ❌ | ❌ | ❌ |
| Establish connection via Bluetooth® A) | ✅ | ✅ | ✅ | ✅ | ✅ |
| Sleep mode | ✅ | ✅ | ✅ | ❌ | ✅ |
| Switch on the keyboard lock | ❌ | ❌ | ❌ | ❌ | ✅ |
| Switch off the keyboard lock | ✅ | ✅ | ✅ | ❌ | ✅ |
| Rotation operation | ✅ | ✅ | ✅ | ❌ | ✅ |
| Line and point operation | ❌ | ✅ | ✅ | ❌ | ✅ |
| Turning the line/point within the rotational plane | ❌ | ✅ | ✅ | ❌ | ✅ |
| Turning the rotational plane when in the vertical position | ❌ | ✅ | ✅ | ❌ | ✅ |
| Automatic plumb point function in the vertical position | ❌ | ✅ | ✅ | ❌ | ✅ |
| Center line mode | ✅ | ✅ | ❌ | ✅ | ✅ |
| Partial projection (Mask Mode) | ❌ | ❌ | ❌ | ❌ | ✅ |
| Shock-warning function | ✅ | ✅ | ✅ | ❌ | ✅ |
| Inclination operation (Slope) | ✅ | ✅ | ✅ | ❌ | ✅ |
| Manual operation | ✅ | ✅ | ❌ | ❌ | ✅ |
| X-axis and Y-axis calibration (horizontal position) B) | ✅ | ✅ | ❌ | ✅ | ✅ |
| Z-axis calibration (vertical position) | ❌ | ✅ | ❌ | ❌ | ✅ |
A) The function must be started on both the laser level and the remote control, laser receiver or smartphone at the same time.
B) The function must be started on both the measuring tool and the smartphone at the same time or on the laser receiver.
Rectifying Errors
This section provides troubleshooting steps for common issues.
| Problem | Corrective Measure |
|---|---|
| Automatic shut-down (operating temperature exceeded) | Adjust the laser level to the ambient temperature before switching it on. Check measuring accuracy and calibrate if required. |
| Automatic shut-down (empty batteries or rechargeable battery) | Change the batteries or the rechargeable battery. |
| Unsuccessful attempt to connect to the remote control (41) or the laser receiver | Briefly press the on/off button (11). Start the connection process again. If connection is not possible, contact Bosch customer service. |
| Unsuccessful attempt to connect to the mobile device | Briefly press the on/off button (11). Start the connection process again. If connection is not possible, contact Bosch customer service. |
| Measuring tool is at a slant of more than 8.5% or is not in the correct horizontal or vertical position. | Reposition the laser level correctly. Re-leveling will start automatically. |
| Maximum leveling time is exceeded. | Reposition the laser level correctly. Briefly press the on/off button (11) to restart leveling. |
| Change between horizontal and vertical position without switching the measuring tool on/off | Briefly press the on/off button (11) to restart leveling. |
| Unsuccessful calibration of the X-axis, Y-axis, or Z-axis | Cancel calibration, check alignment of laser level and receiver, and restart. If calibration fails repeatedly, have the tool checked by Bosch customer service. |
| Unsuccessful center line mode (X-axis or Y-axis) | Press any button to terminate the function. Check the position of the laser level and laser receiver before restarting. |
Maintenance and Service
- Store and transport the tool only in the supplied protective case.
- Check the tool each time before using.
- Keep the tool clean and dry at all times.
- Do not immerse the tool into water or other fluids.
- Wipe off debris using a moist and soft cloth. Do not use cleaning agents or solvents.
- Regularly clean the surfaces at the laser exit opening.
- If the tool shows visible damage or loose components, safe function is no longer ensured.
- For repairs, contact an authorized after-sales service center for Bosch power tools. Include the 10-digit article number in all correspondence and spare parts orders.
Environment Protection
Recycle raw materials & batteries instead of disposing of waste. The unit, accessories, packaging & used batteries should be sorted for environmentally friendly recycling in accordance with the latest regulations.
Limited Warranty
Robert Bosch Tool Corporation ("Seller") warrants to the original purchaser only, that all Bosch lasers and laser levels will be free from defects in material or workmanship for a period of one (1) year from date of purchase. Warranty coverage extends to two (2) years upon product registration within eight (8) weeks of purchase (online or via mail). If not registered, a one (1) year limited warranty applies.
30 Day Money Back Refund or Replacement: Return the product within 30 days of purchase with the original receipt for a full refund or replacement. Maximum 2 returns per customer.
Warranty Obligation: Repair or replacement of defective parts, without charge, provided they have not been misused, carelessly handled, or misrepaired. Return the complete tool, transportation prepaid, to any BOSCH Factory Service Center or Authorized Service Center with a dated proof of purchase.
Warranty for Tripods and Rods: Bosch warrants tripods and leveling rods for one (1) year from date of purchase.
Warranty for Other Accessories: Other accessory items receive a 90-day limited warranty.
Limitations: Implied warranties are limited to one year. Seller is not liable for incidental or consequential damages. These rights may vary by state/province.
This warranty applies only to products sold within the USA, Canada, and Puerto Rico. Contact local dealers for warranty coverage in other countries.
