GRL 500 HV Professional - Non catégorisé BOSCH - Free user manual and instructions

USER MANUAL GRL 500 HV Professional BOSCH

OBJ_BUCH-1960-005.book Page 3 Monday, March 26, 2018 10:03 AM1 609 92A 4DX | (26.3.18) Bosch Power Tools 4 | GRL 500 HV

OBJ_BUCH-1960-005.book Page 4 Monday, March 26, 2018 10:03 AM5 | 1 609 92A 4DX | (26.3.18) Bosch Power Tools GRL 500 H

OBJ_BUCH-1960-005.book Page 5 Monday, March 26, 2018 10:03 AM1 609 92A 4DX | (26.3.18) Bosch Power Tools 6 | LR 50

OBJ_BUCH-1960-005.book Page 6 Monday, March 26, 2018 10:03 AM| 7 Bosch Power Tools 1 609 92A 4DX | (26.3.18)

OBJ_BUCH-1960-005.book Page 8 Monday, March 26, 2018 10:03 AM| 9 Bosch Power Tools 1 609 92A 4DX | (26.3.18)

OBJ_BUCH-1960-005.book Page 9 Monday, March 26, 2018 10:03 AM1 609 92A 4DX | (26.3.18) Bosch Power Tools 10 |

• Protection p. 43
• Marking p. 43
• Display Illumination p. 43
• Attaching with the Measuring Rod Clamp (see figure G) 43 Accuracy Check of the Measuring Tool p. 43
• Influences on Accuracy p. 43
• Checking the Levelling Accuracy in the Horizontal Position p. 44
• Checking the Levelling Accuracy in the Vertical Position (GRL 500 HV) p. 44
• Calibrating the Measuring Tool p. 44
• X-Axis Calibration p. 44
• Y-Axis Calibration p. 45
• Z-Axis Calibration (GRL 500 HV) p. 45
• Working Advice p. 46
• Setting the Display of the Units p. 46
• Laser Viewing Glasses (Accessory) p. 46
• Working with the Tripod (Accessory) p. 46
• OBJ_BUCH-1960-005.book Page 31 Wednesday, March 28, 2018 11:41 AM32 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools Working with Wall Mount/Alignment Unit (Accessory) p. 46
• Working with the Measuring Rod (Accessory) (see figure H) p. 46
• Work Examples p. 46
• Checking the Depth of Building Pits (see figure I) p. 46
• Correction of Malfunctions p. 47
• Malfunctions with Error Codes p. 47
• Malfunctions without Error Codes p. 48
• Maintenance and Service p. 48
• Maintenance and Cleaning p. 48
• After-sales Service and Application Service p. 48
• Great Britain p. 48
• Ireland p. 48
• Australia, New Zealand and Pacific Islands p. 49
• Republic of South Africa p. 49
• Transport p. 49
• Disposal p. 49
• Great Britain Safety Notes Rotational Laser Level All instructions must be read and observed in order to work safely with the measuring tool. The integrated protections in the measuring tool may be compromised if the measuring tool is not used in accordance with the instructions provided. Never make warning signs on the measuring tool unrecognisable. STORE THESE IN- STRUCTIONS IN A SAFE PLACE AND INCLUDE THEM WITH THE MEASURING TOOL WHEN GIVING IT TO A THIRD PARTY. Caution – The use of other operating or adjusting equipment or the application of other processing meth- ods than those mentioned here can lead to dangerous radiation exposure. The measuring tool is provided with a warning label (marked with number 8 in the representation of the measuring tool on the graphics page). If the text of the warning label is not in your national language, stick the provided warning label in your na- tional language over it before operating for the first time. Do not direct the laser beam at persons or animals and do not stare into the di- rect or reflected laser beam yourself, not even from a distance. You could blind somebody, cause accidents or damage your eyes. If laser radiation strikes your eye, you must deliberate- ly 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 viewing glasses as safety goggles. The laser viewing glasses are used for improved visualisa- tion of the laser beam, but they do not protect against laser radiation. Do not use the laser viewing glasses as sun glasses or in traffic. The laser viewing glasses do not afford complete UV protection and reduce colour perception. Have the measuring tool repaired only through quali- fied specialists using original spare parts. This ensures that the safety of the measuring tool is maintained. Do not allow children to use the laser measuring tool without supervision. They could unintentionally blind other persons or themselves. Do not operate the measuring tool in explosive environ- ments, such as in the presence of flammable liquids, gases or dusts. Sparks can be created in the measuring tool which may ignite the dust or fumes. Protect the measuring tool against heat, e.g., against continuous intense sunlight, fire, water, and moisture. Danger of explosion. Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally oc- curs, flush with water. If liquid contacts eyes, addition- ally seek medical help. Liquid ejected from the battery may cause irritations or burns. In case of damage and improper use of the battery, va- pours may be emitted. Ventilate the area and seek medical help in case of complaints. The vapours can irri- tate the respiratory system. Charge the battery pack only with the battery charger provided. A charger that is suitable for one type of battery pack may create a risk of fire when used with another bat- tery pack. Keep the measuring tool and the laser tar- get plate away from cardiac pacemakers. The magnets of the measuring tool and laser target plate generate a field that can impair the function of cardiac pacemakers. Keep the measuring tool and the laser target plate away from magnetic data medium and magnetically- sensitive equipment. The effect of the magnets of the measuring tool and laser target plate can lead to irreversi- ble data loss. p. 49

OBJ_BUCH-1960-005.book Page 32 Wednesday, March 28, 2018 11:41 AMEnglish | 33 Bosch Power Tools 1 609 92A 4DX | (28.3.18) Battery Charger Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious in- jury. This charger is not intended for use by children and persons with phy- sical, sensory or mental limitations or a lack of experience or know- ledge. This charger can be used by children aged 8 and above and by persons who have physical, senso- ry or mental limitations or a lack of experience or knowledge if a per- son responsible for their safety supervises them or has instructed them in the safe operation of the charger and they understand the associated dangers. Otherwise, there is a danger of operating errors and injuries. Supervise children during use, cleaning and maintenance. This will ensure that children do not play with the charger. Keep the battery charger away from rain or mois- ture. Penetration of water in the battery charger in- creases the risk of an electric shock. Charge the measuring tool only with the supplied charger. Keep the battery charger clean. Contamination can lead to danger of an electric shock. Before each use, check the battery charger, cable and plug. If damage is detected, do not use the battery charger. Never open the battery charger yourself. Have repairs performed only by a qualified technician and only using original spare parts. Damaged battery chargers, cables and plugs increase the risk of an electric shock. Do not operate the battery charger on easily inflamma- ble surfaces (e. g., paper, textiles, etc.) or surround- ings. The heating of the battery charger during the charg- ing process can pose a fire hazard. In case of damage and improper use of the battery pack, vapours may be emitted. Provide for fresh air and seek medical help in case of complaints. The vapours can irritate the respiratory system. Products sold in GB only: Your product is fitted with a BS 1363/A approved electric plug with internal fuse (ASTA approved to BS 1362). If the plug is not suitable for your socket outlets, it should be cut off and an appropriate plug fitted in its place by an authorised customer service agent. The replacement plug should have the same fuse rating as the original plug. The severed plug must be disposed of to avoid a possible shock hazard and should never be inserted into a mains socket elsewhere. Laser Receiver/Remote Control Read and observe all instructions. SAVE

THESE INSTRUCTIONS FOR FUTURE REFER-

ENCE. Have the measuring tool repaired only through quali- fied specialists using original spare parts. This ensures that the safety of the measuring tool is maintained. Do not operate the measuring tool in explosive environ- ments, such as in the presence of flammable liquids, gases or dusts. Sparks can be created in the measuring tool which may ignite the dust or fumes. Protect the measuring tool against heat, e.g., against continuous intense sunlight, fire, water, and moisture. Danger of explosion. Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally oc- curs, flush with water. If liquid contacts eyes, addition- ally seek medical help. Liquid ejected from the battery may cause irritations or burns. In case of damage and improper use of the battery, va- pours may be emitted. Ventilate the area and seek medical help in case of complaints. The vapours can irri- tate the respiratory system. Charge the battery pack only with the battery charger provided. A charger that is suitable for one type of battery pack may create a risk of fire when used with another bat- tery pack. Product Description and Specifications Intended Use Rotational Laser Level GRL 500 H The measuring tool is intended for determining and checking precise horizontal partitions. The measuring tool is intended for outdoor use, but can also be used indoors. Rotational Laser Level GRL 500 HV The measuring tool is intended for determining and checking precise horizontal partitions, vertical lines, building lines and plumb points. The measuring tool is intended for outdoor use, but can also be used indoors. OBJ_BUCH-1960-005.book Page 33 Wednesday, March 28, 2018 11:41 AM34 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools Laser Receiver LR 50 The laser receiver is designed to quickly locate rotating laser beams and to remote-control the rotational laser level. The laser receiver is suitable for indoor and outdoor use. Note: The LR 50 functions both as a laser receiver and as a re- mote control. To make descriptions and instructions easier to read, the LR 50 is referred to only as a “laser receiver” in the following text. Product Features The numbering of the product features refers to the illustra- tion of the rotational laser level, battery charger and laser re- ceiver on the graphics page. Rotational Laser Level 1 Plumb beam (GRL 500 HV) 2 Laser beam outlet 3 Prism cover (aluminium, glass) 4 Theft alarm LED 5 Charge contacts for laser receiver 6 Charging/storage station for laser receiver 7 Laser beam 8 Laser warning label 9 Serial number of the rotational laser level 10 Tripod mount 5/8" (vertical) (GRL 500 HV) 11 Charge socket cover 12 Tripod mount 5/8" (horizontal) 13 Reset button 14 Socket for charge connector Laser Receiver 15 Display 16 Centre mark 17 On/Off button 18 Slope button, up 19 Centre line mode button 20 Slope button, down 21 Sleep mode button 22 Theft alarm button 23 Button for selecting the measuring accuracy 24 Audio signal/volume button 25 Calibration button 26 Reception area for the laser beam 27 Serial number of laser receiver 28 Charge contacts Indicator elements of laser receiver 29 Battery charge-control indicator for rotational laser level 30 Battery charge-control indicator for laser receiver 31 Text display for slope/error 32 Text display for relative height/calibration interval 33 RF communication indicator 34 Out-of-temperature-range indicator 35 Calibration interval indicator 36 Theft alarm indicator 37 Out-of-level indicator 38 Shock-warning indicator 39 Direction indicator “move upward” 40 Direction indicator “move downward” 41 Slope mode indicator 42 Centre line mode indicator 43 Centre line indicator 44 Sleep mode indicator 45 Indicator for audio signal/volume 46 Indicator for measuring accuracy “Fine” 47 Indicator for measuring accuracy “Medium” 48 Indicator for measuring accuracy “Coarse” Charger 49 Battery charger 50 Charge connector 51 Connector plug 52 Power plug Accessories/Spare parts 53 Measuring rod clamp 54 Locking screw for measuring rod clamp 55 Construction laser measuring rod* 56 Fastening screw for measuring rod clamp 57 Spirit level of measuring rod clamp 58 Slot for laser receiver 59 Wall mount/alignment unit* 60 Fastening screw of the wall mount* 61 Screw of the alignment unit* 62 5/8" screw on wall mount* 63 Tripod* 64 Laser viewing glasses* 65 Case *Accessories shown or described are not part of the standard de- livery scope of the product. A complete overview of accessories can be found in our accessories program. OBJ_BUCH-1960-005.book Page 34 Wednesday, March 28, 2018 11:41 AMEnglish | 35 Bosch Power Tools 1 609 92A 4DX | (28.3.18) Technical Data Rotational Laser Level GRL 500 H GRL 500 HV Article number 3 601 K61 A.. 3 601 K61 B.. Working range (radius) – without laser receiver, approx.

– with laser receiver, approx. 10 m 250 m 10 m 250 m Levelling Accuracy

±0.1mm/m ±0.1mm/m Self-levelling range, typically ±8.5 % (±5°) ±8.5 % (±5°) Levelling duration, typically 15 s 15 s Rotational speed 600 min

Single-axis slope operation (adjustable via keypad and display) Accuracy

Laser beam Ø at the exit opening, approx.

4mm 4mm Operating frequency range 863–870 MHz 863–870 MHz Max. transmit power 20 mW 20 mW Tripod mount –Vertical –Horizontal 5/8"

5/8" 5/8" Weight according to EPTA-Procedure 01:2014

Dimensions (length x width x height) 234 x 217 x 194 mm 234 x 217 x 194 mm Degree of protection IP 56 (protected against dust and powerful water jets) IP 56 (protected against dust and powerful water jets) Battery Li-Ion Li-Ion Rated voltage

Capacity 3 Ah 3 Ah Number of battery cells

Operating time, approx. 25 h 25 h

1) The working range (radius) can be reduced due to unfavourable ambient conditions (e.g. direct sunlight).

3) alongside the axes

For clear identification of your rotational laser level, see the serial number 9 on the type plate. OBJ_BUCH-1960-005.book Page 35 Wednesday, March 28, 2018 11:41 AM36 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools Assembly Charging the Batteries of the Measuring Tool and Laser Receiver (see figures A –B) Do not use a different battery charger. The battery charger provided is matched to the lithium-ion battery in- stalled in your measuring tool. Observe the mains voltage! The voltage of the power source must correspond with the data on the type plate of the battery charger. The measuring tool and laser receiv- er must be charged only in dry in- door areas. The charging cable is not permitted for charging outdoors or in moist environments. Note: The batteries of the measuring tool and laser receiver are supplied partially charged. To ensure full capacity of the batter- ies, completely charge the batteries before the first use. The lithium-ion battery can be charged at any time without re- ducing its service life. Interrupting the charging procedure does not damage the battery. Charge-control Indicator The measuring tool must be switched on (see “Switching On”, page 38) to display the battery charge status of the measur- ing tool and laser receiver. If the measuring tool is switched off and the laser receiver is in the charging/storage station 6, the battery charge status can be displayed as follows: The display illumination switches off again after 5 s. Laser Receiver/Remote Control LR 50 Article number 3 601 K69 A.. Receivable wavelength 625–645 nm Working range (radius)

– Laser Receiver with Rotational Laser Level –Remote Control 250 m 150 m Receiving angle 70° (±35°) Measuring accuracy

Weight according to EPTA-Procedure 01:2014

Dimensions (length x width x height) 152 x 77 x 32 mm Degree of protection IP 56 (protected against dust and powerful water jets) Battery Li-Ion Rated voltage

Capacity 1 Ah Number of battery cells

Operating time, approx. 25 h

1) The working range (radius) can be reduced due to unfavourable

ambient conditions (e.g. direct sunlight).

2) depends on clearance between laser receiver and rotational laser level

3) at a distance of 30 m

4) with display illumination deactivated

The serial number 27 on the type plate is used to clearly identify your laser receiver/remote control. Battery Charger Article number 2 610 A16 4.. Charging time approx. 3 h Output voltage 12 V Charging current

Protection class /II Display Indications Meaning Capacity Remaining measuring time, approx.

Battery fully charged. 60–100 % 15–25 h

Battery par- tially charged. 40–60% 10–15h

Battery par- tially charged. 20–40% 5–10h

Battery par- tially charged. 10–20% 2.5–5h

Battery should be recharged. 0–10% 0–2.5h

– Press the sleep mode button 21 until the audio signal sounds. The battery charge-control indicators 29 and 30 are displayed. OBJ_BUCH-1960-005.book Page 36 Wednesday, March 28, 2018 11:41 AMEnglish | 37 Bosch Power Tools 1 609 92A 4DX | (28.3.18) Battery Charging – Clean soiled charger contacts using a dry cloth. – Plug the charge connector 51 into the socket provided on the charger 49. The measuring tool can be recharged independently of the la- ser receiver, however the laser receiver can only be re- charged together with the measuring tool. Measuring tool (see figure A): – Open the cover 11 of the charge socket 14. – Plug the power plug 52 of the power supply into the socket outlet and the charge connector 50 into the charge socket

Laser Receiver (see figure B): – Slide the laser receiver into the charging/storage station 6. – Open the cover 11 of the charge socket 14. – Plug the power plug 52 of the power supply into the socket outlet and the charge connector 50 into the charge socket

The measuring tool and the laser receiver will switch off after charging. Disconnect the battery charger from the mains supply when not using it for longer periods. Protect the battery charger against moisture! Recommendations for Optimal Handling of the Battery Store the measuring tool and the laser receiver only within the permitted temperature range, see “Technical Data”. As an ex- ample, do not leave them in the car in summer. A significantly reduced working period after charging indi- cates that the battery is used and must be replaced. Observe the notes for disposal. Operation Initial Operation Keep the measuring tool and the laser receiver dry and protect them from direct sunlight. Do not expose the measuring tool and the laser receiv- er to extreme temperatures or variations in tempera- ture. For example, do not leave them in a car for extended periods of time. In case of large variations in temperature, allow the measuring tool and the laser receiver to adjust to the ambient temperature before putting them into opera- tion. The precision of the measuring tool and the laser re- ceiver may be compromised if exposed to extreme temper- atures or variations in temperature. Avoid heavy impact to or falling down of the measuring tool. After severe exterior effects to the measuring tool, it is recommended to carry out an accuracy check (see “Ac- curacy Check of the Measuring Tool”, page 43) each time before continuing to work. Setting Up the Measuring Tool – Position the measuring tool on a stable surface in the hori- zontal or vertical position, mount it to a tripod or to the wall mount 59 with alignment unit. Due to the high levelling accuracy, the measuring tool reacts sensitively to ground vibrations and position changes. There- fore, pay attention that the position of the measuring tool is stable in order to avoid operational interruptions due to re- levelling. Operating the Measuring Tool (see figure C) The measuring tool is operated using the buttons on the laser receiver. Operation can be carried out either directly at the measuring tool (laser receiver docked in charging/storage station 6) or via RF communication (laser receiver acts as a re- mote control). Operating States The system consisting of measuring tool and laser receiver knows 3 operating states: – Operating All functions of the measuring tool and laser receiver are activated. See “Switching On”, page 38. – Sleep mode To save energy, most of the functions of the measuring tool are deactivated for 2 h maximum. The theft alarm system and the anti-drift system are still ac- tivated. All settings (audio signal/volume, measuring accuracy, slope, etc.) are saved. See “Sleep Mode”, page 38. – Switched off All functions of the measuring tool and laser receiver are deactivated. See “Switching Off”, page 38, and “Automatic Shutdown”, page 38. Switching On and Off 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. Do not leave the switched-on measuring tool unattend- ed and switch the measuring tool off after use. Other persons could be blinded by the laser beam. Note: Before using the measuring tool, you should always perform an accuracy check (see “Accuracy Check of the Measuring Tool”, page 43). Display Indications Meaning

Batteries charging. The segments flash successively during charging.

Horizontal mode (GRL 500 H/ GRL 500 HV) Vertical mode (GRL 500 HV) OBJ_BUCH-1960-005.book Page 37 Wednesday, March 28, 2018 11:41 AM38 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools Initial Operation Note: In their delivery condition, the measuring tool and laser receiver are paired (= laser receiver can perform the remote control functions). To save energy, only switch the measuring tool and the laser receiver on when you are using them. Switching On Outcome – All display indicators light up briefly. – Automatic levelling starts (see “Automatic Levelling”, page 40). – The anti-drift system is activated 30 s after automatic lev- elling (see “Anti-Drift System (ADS)”, page 40). The measuring tool then emits the laser beam 7 (GRL 500 H) or the laser beam 7 and the plumb beam 1 (GRL 500 HV). Switching Off Outcome – The rotation stops and the laser beam is switched off. – All display indicators and the display illumination are switched off. Note: If the laser receiver and the rotational laser level are switched off, the laser receiver first has to be docked back in the charging/storage station 6 to switch the tool on. Sleep Mode The laser receiver can be used to put the measuring tool into sleep mode for maximum 2 hours. Sleep mode is automatically switched on if the laser beam does not run through the reception area 26 for more than 30 minutes or the buttons on the laser receiver are not pressed for more than 30 minutes. Note: If the laser receiver and the rotational laser level are in sleep mode for more than 2 h, both are automatically switched off. The laser receiver first has to be docked back in the charging/storage station 6 to switch the tool on. The standard setting on delivery is [Sleep mode function deactivated]. Automatic Shutdown The measuring tool and the laser receiver switch off automat- ically under certain conditions (see “Switching Off”, page 38 for outcome): – The measuring tool is outside of the self-levelling range for more than 2.5 h and the error code resulting from this is not rectified (see “Correction of Malfunctions”, page 47). – The measuring tool is not switched on again within 2 h when sleep mode is activated. – The anti-drift system is triggered for more than 2.5 h. – The measuring tool is outside of the operating temperature range. Before the measuring tool and laser receiver auto- matically switch off, an audio signal sounds and the out-of-temperature-range indicator 34 flashes for approx. 5 s. – To switch on the measuring tool, slide the laser receiver into the charging/storage station 6 and then press the On/Off button 17.

– Slide the laser receiver into the charging/storage station 6 and remove it from the charging/stor- age station again. To switch on the measuring tool, you then have to press the On/Off button

within 30 minutes. – Press the On/Off button 17 for approx. 2 s. – To switch on sleep mode, press the sleep mode button 21. In sleep mode, the sleep mode indicator 44 on the laser receiver lights up and the theft alarm indicator 36 also lights up if the theft alarm system is activat- ed. The theft alarm LED 4 on the measuring tool flashes if the theft alarm system is activated. All other indicators and the laser beam are switched off. The anti-drift system remains activat- ed. – To end sleep mode, press the sleep mode button 21 again. – To activate the sleep mode function, si- multaneously press the On/Off button 17 and the sleep mode button 21 for approx. 2 s while the measuring tool is switched on. The new state [Sleep mode function acti- vated = SLP On] and the sleep mode indi- cator 44 will be shown on the display for approx. 3 s. This setting is not saved when the tool is switched off. The measuring tool always starts up with the sleep mode function de- activated. – To deactivate the sleep mode function, simultaneously press the On/Off button 17 and the sleep mode button 21 for approx. 2 s while the measuring tool is switched on. The new state [Sleep mode function deac- tivated = SLP OFF] and the sleep mode in- dicator 44 will be shown on the display for approx. 3 s. OBJ_BUCH-1960-005.book Page 38 Wednesday, March 28, 2018 11:41 AMEnglish | 39 Bosch Power Tools 1 609 92A 4DX | (28.3.18) After automatic shutdown: – If applicable, wait until the measuring tool and the laser re- ceiver are back in the operating temperature range. – If required, reposition the measuring tool and switch it on again. RTC (Real Time Clock) Battery Theft Alarm System The system consisting of measuring tool and laser receiver has two security mechanisms to help prevent theft: – The measuring tool can only be operated using the laser re- ceiver; there is no control panel on the measuring tool. – Both audible and visual indications are given on the meas- uring tool and on the laser receiver when the measuring tool is moved away from the reference point. Activating the Theft Alarm System The default setting in the delivery condition is [Theft alarm system deactivated]. The setting for the theft alarm system is saved when the tool is switched off. To deactivate, press the theft alarm button 22 while the measuring tool is switched on. Applications of the Theft Alarm System If the theft alarm system is activated and the measuring tool moves away from the current location for more than 5 s, the alarm system will be triggered: – An audio signal is emitted on the measuring tool and on the laser receiver. The A-weighted sound pressure level of the audio signal is up to 110 dB(A) and cannot be adjusted using the volume setting of the normal audio signal. Do not hold the laser receiver close to your ear! The loud audio signal can cause hearing defects. – All operating functions are locked. Indicators for Checking Calibration (Calibration Warning) If the calibration of the measuring tool has to be checked, this is shown on the display of the laser receiver after switching on by means of various indicators in combination with the “CAL” indicator. Note: The sensors for a calibration warning (calibration inter- val, storage temperature, shocks to the measuring tool) are active after the tool is started up for the first time. The indicators for checking calibration are displayed for a short time, then go out and are not displayed again until the tool is switched on. Switching Off the Calibration Warning Indicators You can switch off the indicators until the cause of the calibra- tion warning occurs again. If the calibration interval indicator 35 flashes for approx. 10 s after the tool is switched on, the RTC battery and the integrated battery are weak. The calibration interval will no longer be monitored. – Contact an authorised service agent for Bosch power tools. – Press the theft alarm button 22 while the meas- uring tool is switched on. The theft alarm system is activated. The theft alarm indicator 36 and the theft alarm LED 4 light up. Application Security mechanism Measuring tool switched on.

Measuring tool in sleep mode. Alarm system activated Theft alarm indicator 36 lights up continuously Theft alarm LED 4 flash- es slowly on the measur- ing tool Measuring tool switched off. Laser receiver switched off and not in the charging/storage station 6. Alarm system deactivated Theft alarm indicator 36 is not dis- played Theft alarm LED 4 does not light up on the measuring tool – The theft alarm LED 4 on the measuring tool flashes quickly. – The theft alarm indicator 36 on the laser receiver flashes. –To switch off the triggered alarm, press the theft alarm button 22. The audio signal is switched off. All operating functions are unlocked. All settings are reset to the default settings when switching the tool on (see “Switching On”, page 38). The theft alarm system is activated again. Display Indications Calibration warning Cause lights up Calibration interval in- dicator 35 lights up The calibration interval (every 12 months) has expired. lights up Out-of-temperature- range indicator 34 lights up The measuring tool was stored outside of the storage temper- ature range. lights up Shock-warning in- dicator 38 lights

The measuring tool suffered a severe shock (e.g. impact on the floor after a fall). – Press the calibration button 25 for approx. 2 s while the calibration warning is being displayed. The indicators for checking calibration are not displayed again until the cause of the calibration warning occurs again. OBJ_BUCH-1960-005.book Page 39 Wednesday, March 28, 2018 11:41 AM40 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools Recommended procedure after an indication to check calibration Operating Modes Orientation of X- and Y-Axis The orientation of the X- and Y-axis is marked on the housing above the rotation head. Rotational Operation The measuring tool operates with a fixed rotational speed (600 rpm), which is suitable for use of a laser receiver. Operating Modes Overview –Automatic Levelling after switching on/during operation – Single-axis Slope Operation –Centre Line Mode –Anti-Drift System (ADS) – Line Control in Vertical Mode (GRL 500 HV) Automatic Levelling Automatic Levelling after Switching On After switching on, the measuring tool checks the horizontal position and automatically compensates for irregularities within the self-levelling range of approx. 8.5% (5°). GRL 500 HV: Once it has been switched on, the measuring tool automatically detects the horizontal or vertical position. To change between the horizontal and vertical position, you can reposition it without switching it off. Automatic Levelling during Operation If after a position change the measuring tool is outside of the self-levelling range of approx. 8.5 % (5°), levelling is no longer possible and an error code is displayed (see “Correction of Malfunctions”, page 47). If the measuring tool is levelled, it constantly checks the level position. Re-levelling is automatically performed if there are any position changes. To prevent incorrect measurements, the rotation of the laser beam stops during the levelling pro- cess. Single-axis Slope Operation When the measuring tool is in the horizontal position, the X- axis is automatically levelled while in single-axis slope opera- tion. The rotational plane can be turned around the X-axis in a range of ±8.5%. Note: If you want to perform a slope setting immediately after switching on, you have to wait for the automatic levelling (see “Automatic Levelling after Switching On”, page 40). This pre- vents incorrect measuring results. Slope Setting Slope setting is possible within a range of ±8.5%. If the slope range of ±8.5 % is exceeded, the slope mode indi- cator 41 goes out and an error code is displayed (see “Correc- tion of Malfunctions”, page 47). Centre Line Mode (see figure D) In centre line mode, the measuring tool automatically tries to find the centre line of the laser receiver by moving the rotation head upward and downward. Search Sequence:

1. Rotation head pivots upwards to the stop.

2. Laser beam is switched on.

3. Rotation head pivots downwards.

Step see page 1 Check levelling accuracy 43 2a Deviation in 30 m is within the maximum permitted limits of ±3.0 mm: Switch off calibration warning indicators 39 2b Deviation in 30 m is outside of the maxi- mum permitted limits of ±3.0 mm: Calibrate measuring tool 44 3b Check levelling accuracy 43 4b Deviation in 30 m after calibration is within the maximum permitted limits of ±3.0 mm: Work can be performed without loss of accuracy. Deviation in 30 m after calibration is still outside of the maximum permitted limits of ±3.0 mm: Have measuring tool checked by a Bosch customer service agent The out-of-level indicator 37 flashes during levelling.

– Press and hold the slope button 18 or 20 until the desired slope value is shown on the display. – Let go of the slope button 18 or 20 again. The out-of-level indicator 37 flashes dur- ing slope setting. The slope mode indicator 41 lights up con- tinuously. – Simultaneously press the slope buttons 18 and

Slope setting is deactivated. Automatic levelling is activated (see “Automatic Levelling”, page 40). – Press the centre line mode button 19 for approx. 2s. Automatic upward and downward movement of the rotation head starts. OBJ_BUCH-1960-005.book Page 40 Wednesday, March 28, 2018 11:41 AMEnglish | 41 Bosch Power Tools 1 609 92A 4DX | (28.3.18) 4a. Laser beam hits the reception area 26 and finds the cen- tre line.

4b. Laser beam reaches the end of the pivoting range without finding a reception area; an error code is displayed (see “Cor- rection of Malfunctions”, page 47). The speed at which the rotation head moves will slow down as soon as the laser beam hits the reception area 26. When the centre line has been found, the measuring tool au- tomatically switches off the centre line mode. The set slope is saved and shown on the display. Speeding Up Finding the Centre Line of the Laser Receiver Searching for the centre line of the laser receiver always be- gins with an upward movement of the rotation head. The di- rection of the movement can be changed if the laser beam is below the centre line and not yet in the reception area of the laser receiver. Anti-Drift System (ADS) The measuring tool has an anti-drift system; after position changes or shock to the measuring tool, or in case of ground vibrations, it keeps the measuring tool from levelling in at changed heights, and thus prevents vertical errors. If the vertical position of the measuring tool is changed or a se- vere shock is registered, then the anti-drift system is trig- gered: the rotation of the laser is stopped and the shock- warning indicator 38 flashes. In addition, a beep sounds for 5 s on the laser receiver. – Now check the height of the laser beam against a reference point and correct the height of the measuring tool if neces- sary. Deactivating the Anti-Drift System The anti-drift system can be deactivated during operation of the measuring tool. This setting is not saved when the tool is switched off. The measuring tool always starts with the anti-drift system acti- vated. Line Control in Vertical Mode (GRL 500 HV) When the measuring tool is in the vertical mode, you can posi- tion the rotational plane along the X-axis for simple alignment or parallel alignment. Positioning is possible within a range of ±8.5%. The speed at which the rotation head moves begins slowly and continually increases. Centre Line Mode in Line Control (see figure E) In centre line mode, the measuring tool automatically tries to find the centre line of the laser receiver by moving the rotation head left and right. Search Sequence:

1. Rotation head pivots right to the stop.

2. Laser beam is switched on.

4b. Laser beam reaches the end of the pivoting range without finding a reception area; an error code is displayed (see “Cor- rection of Malfunctions”, page 47). The out-of-level indicator 37 flashes dur- ing the search for the centre line. The indicators for centre line mode 42 light up continuously. As soon as the laser beam hits the recep- tion area 26, a beep sounds until the cen- tre line is found. – To cancel centre line mode during the search, press the centre line mode button 19.

– Simultaneously press the slope buttons 18 and 20 to activate automatic levelling. – Press the centre line mode button 19 for approx. 2s. Automatic upward and downward movement of the rotation head starts. – Press the slope button 20. The rotation head is moved downwards. The anti-drift system is activated approx. 30 s after the measuring tool has been switched on. During activation the shock-warning indicator 38 flashes slowly. The indicator lights up continuously after activation. – Press the On/Off button 17 briefly when the an- ti-drift system is triggered. Automatic levelling starts (see “Automatic Level- ling during Operation”, page 40). – Press the On/Off button 17. The anti-drift system is deactivated. The shock- warning indicator 38 is no longer displayed. – To turn the rotational plane clockwise, press the slope button 18; to turn it counterclockwise, press the slope button 20. – Press the centre line mode button 19 for approx. 2s. Automatic left/right movement of the rotation head starts. OBJ_BUCH-1960-005.book Page 41 Wednesday, March 28, 2018 11:41 AM42 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools The speed at which the rotation head moves will slow down as soon as the laser beam hits the reception area 26. When the centre line has been found, the measuring tool au- tomatically switches off the centre line mode. Speeding Up Finding the Centre Line of the Laser Receiver Searching for the centre line of the laser receiver always be- gins with a right-hand movement of the rotation head. The di- rection of the movement can be changed if the laser beam is to the left of the centre line and not yet in the reception area of the laser receiver. Relative Height Display (see figure F) Working with the Laser Receiver For outdoor use or longer distances indoors, use the laser re- ceiver to find the laser beam. – Place the laser receiver so that the laser beam can reach the reception area 26. RF Communication between Measuring Tool and Remote Control/Laser Receivers In its delivery condition, the laser receiver provided LR 50 acts as a remote control for the measuring tool via a wireless connection. Multiple laser receivers LR 50 can be assigned to the measur- ing tool. – Switch off the measuring tool and the laser receiver. – Dock the additional laser receiver in the charging/storage station 6. – Remove the laser receiver from the charging/storage sta- tion again. To switch on the measuring tool, you then have to press the On/Off button 17 within 30 minutes. Note: If multiple laser receivers have been assigned to a measuring tool, then the last assigned laser receiver acts as the remote control. The other laser receivers are then purely laser receivers. Settings such as measuring accuracy or audio signal can be set individually for each laser receiver. If the remote control/laser receiver is switched off, the meas- uring tool switches off. All other laser receivers each have to switch off separately. Note: Sleep mode of the measuring tool can be switched on and off only by pressing the sleep mode button 21 on the re- mote control/laser receiver. Setting the Audio Signal/Volume The position of the laser beam on the reception area 26 can be indicated via an audio signal. You can choose between two volumes or switch off the audio signal. The default setting in the delivery condition is [Normal audio signal]. The setting for audio signal/volume is saved when the tool is switched off. The out-of-level indicator 37 flashes dur- ing the search for the centre line. The indicators for centre line mode 42 light up continuously. As soon as the laser beam hits the recep- tion area 26, a beep sounds until the cen- tre line is found. – To cancel centre line mode during the search, press the centre line mode button 19.

– Simultaneously press the slope buttons 18 and 20 to activate automatic levelling. – Press the centre line mode button 19 for approx. 2s. The rotation head is automatically moved to the right. – Press the slope button 20. The rotation head is moved downwards. The distance between the rotational plane and the centre line is shown on the display as an absolute value (in [mm] or [inch]). See also “Setting the Display of the Units”, page 46. – The RF communication indicator 33 is displayed to indicate the remote control function on the la- ser receiver. – Press the On/Off button 17. – The RF communication indicator 33 is displayed to indicate the remote control function on the la- ser receiver. If the RF communication is lost, the RF communica- tion indicator 33 flashes and an audio signal sounds. This signals that warnings (e.g. theft, anti-drift, cal- ibration) will not be shown and the measuring tool will no longer be remote-controlled. – Press the audio signal/volume button 24 repeat- edly until the desired setting is reached. No indicator: audio signal off Normal audio signal Loud audio signal OBJ_BUCH-1960-005.book Page 42 Wednesday, March 28, 2018 11:41 AMEnglish | 43 Bosch Power Tools 1 609 92A 4DX | (28.3.18) Selecting the Setting of the Centre Line Indicator You can specify the accuracy with which the position of the la- ser beam is indicated as “centred” on the reception area. The default setting in the delivery condition is [Measuring accuracy “medium/3 mm”]. The setting for measuring accuracy is saved when the tool is switched off. Direction Indicators The position of the laser beam in the reception area 26 is indi- cated: – on the display 15 on the front and rear side of the laser re- ceiver by the direction indicator “move upward” 39, the di- rection indicator “move downward” 40 or the centre line indicator 43, – optionally by the audio signal. Laser receiver too low: If the laser beam runs through the up- per half of the reception area 26, then the direction indicator “move upward” 39 lights up and the plus value of the relative height display 32 shows how much the laser receiver has to be moved upwards. If the audio signal is switched on, a signal sounds in a slow rhythm. – Move the laser receiver upwards in the arrow direction. When the centre mark 16 is approached, only the tip of the direction indicator 39 is shown. Laser receiver too high: If the laser beam runs through the lower half of the reception area 26, then the direction indica- tor “move downward” 40 lights up and the minus value of the relative height display 32 shows how much the laser receiver has to be moved downwards. If the audio signal is switched on, a signal sounds in a fast rhythm. – Move the laser receiver downwards in the arrow direction. When the centre mark 16 is approached, only the tip of the direction indicator 40 is shown. Laser receiver centred: If the laser beam runs through the reception area 26 at the height of the centre mark 16, then the centre line indicator 43 lights up. If the audio signal is switched on, a continuous tone sounds. If the measuring tool is moved so that the laser beam leaves the reception area 26 again, the most recently displayed di- rection indicator 39 or 40 will flash for approx. 5 s. Strobe shield

Protection The laser receiver has electronic filters for strobe light. The fil- ters protect against, for example, interference from the warn- ing lights of construction machinery. Marking When the laser beam runs through the centre of the reception area 26, its height can be marked at the centre mark 16 left and right of the laser receiver. When marking, take care to align the measuring tool exactly vertical (for horizontal laser beam), or horizontal (for vertical laser beam), as otherwise the marks are offset with respect to the laser beam. Display Illumination The default setting in the delivery condition is [Display illumination activated]. If no button is pressed after approx. 30 seconds, the display illumination goes out. When any button is pressed or when the laser beam hits the reception area, the display illumination is switched back on. The setting for display illumination is saved when the tool is switched off. Attaching with the Measuring Rod Clamp (see figure G) With the measuring rod clamp 53, the laser receiver can be fastened to a construction laser measuring rod 55 (accesso- ry) as well as to other auxiliary equipment with a width of up to 65 mm. –Fit the slot 58 to the measuring rod clamp 53 using the fas- tening screw 56. – Loosen the locking screw 54, slide the measuring rod clamp onto the construction laser measuring rod 55, for example, and retighten the locking screw 54. – The measuring rod clamp 53 can be horizontally aligned with help of the spirit level 57. A measuring tool mounted out-of-level leads to faulty measurements. – Slide the laser receiver into the slot 58. Accuracy Check of the Measuring Tool The following tasks should be performed only by well-trained and qualified persons. The legalities with regard to perform- ing an accuracy check or calibration of a measuring tool must be known. Influences on Accuracy The ambient temperature has the greatest influence. Espe- cially temperature differences occurring from the ground up- ward can divert the laser beam. In addition to external influences, device-specific influences (e.g. falls or heavy impacts) can also lead to deviations. For this reason, check the calibration each time before beginning work. The deviations play a role in excess of approx. 20 m measur- ing distance and can easily reach two to four times the devia- tion at 100 m. – Press the measuring accuracy setting button 23 repeatedly until the desired setting is reached. Example The measuring accuracy level “fine”/“me- dium”/“coarse” and the exact value are shown on the display. – To switch off the display illumination, simultane- ously press the On/Off button 17 and the audio signal/volume button 24. OBJ_BUCH-1960-005.book Page 43 Wednesday, March 28, 2018 11:41 AM44 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools Because the largest difference in temperature layers is close to the ground, the measuring tool should always be mounted on a tripod when measuring distances exceeding 20 m. If pos- sible, also set up the measuring tool in the centre of the work area. If the measuring tool exceeds the maximum deviation in one of the measuring procedures described below, perform a cal- ibration (see “Calibrating the Measuring Tool”, page 44) or have the measuring tool checked by a Bosch customer service agent. Checking the Levelling Accuracy in the Horizontal Posi- tion A free measuring distance of 30 m on a firm surface in front of a wall is required for the check. A complete measuring proce- dure each must be carried out for the X- and Y-axis. – Mount the measuring tool in the horizontal position onto a tripod or place it on a firm and level surface at a distance of 30 m to the wall. Switch the measuring tool on. – After the levelling, mark the centre of the laser beam on the wall (point I). – Rotate the measuring tool by 180°, allow it to level in and mark the centre point of the laser beam on the wall (point II). Take care that point II is as vertical as possible above or below point I. –The difference d of both marked points I and II on the wall results in the actual height deviation of the measuring tool for the measured axis. Repeat the measuring procedure for the other axis. For this, turn the measuring tool by 90° before starting the measuring procedure. The maximum permitted deviation on the 30 m measuring distance is as follows: 30 m x ±0.1 mm/m = ±3.0 mm. The difference d between points I and II must therefore be maximum 6 mm in each of the two measuring procedures. Checking the Levelling Accuracy in the Vertical Position (GRL 500 HV) A free measuring distance of 10 m on a firm surface in front of a wall is required for the check. Fasten a plumb bob rope to the wall. – Mount the measuring tool in the vertical position onto a tri- pod, or place it on a firm and level surface. Switch the measuring tool on and allow it to level. – Align the measuring tool such that the laser beam impinges centrally on the plumb bob rope at the upper end. The dif- ference d between laser beam and plumb bob rope at the bottom end of the rope results in the deviation of the meas- uring tool to the vertical line. The maximum permitted deviation over a 10 m high measur- ing distance is as follows: 10mx±0.1mm/m=±1mm. The difference d must therefore be maximum 1 mm. Calibrating the Measuring Tool The following tasks should be performed only by well-trained and qualified persons. The legalities with regard to perform- ing an accuracy check or calibration of a measuring tool must be known. Perform calibration of the measuring tool meticulously or have the measuring tool checked by a Bosch custom- er service agent. Inaccurate calibration leads to incorrect measuring results. Start the calibration only if you have to perform a cali- bration of the measuring tool. As soon as the measuring tool is in calibration mode, you must perform the calibra- tion meticulously to the end in order to ensure that no in- correct measuring results are produced afterwards. Note: After calibration, the indicators for checking calibration are not displayed again until the cause of the calibration warn- ing occurs again. A free measuring distance of at least 30 m on a firm surface in front of a straight wall is required for the calibration. Always calibrate all axes (GRL 500 H: X-axis and Y-axis; GRL 500 HV: X-axis, Y-axis and Z-axis). X-Axis Calibration – Mount the measuring tool in the horizontal position on a tri- pod 63 (accessory). – Place the tripod 30 m in front of the wall. The X-axis indica- tor imprinted on the measuring tool must be pointing per- pendicular to the wall. – Switch the measuring tool on. 30 m 180°

10 m OBJ_BUCH-1960-005.book Page 44 Wednesday, March 28, 2018 11:41 AMEnglish | 45 Bosch Power Tools 1 609 92A 4DX | (28.3.18) – Wait until the measuring tool is levelled in. – Use the laser receiver to find the centre line and transfer the height “X1” of the centre line onto the wall. – Turn the measuring tool 180° without adjusting the height of the tripod. – Wait until the out-of-level indicator 37 stops flashing and the measuring tool is levelled in. – Use the laser receiver to find the centre line and transfer the new height “X2” of the centre line onto the wall. – Determine the exact centre between the centre lines “X1” and “X2” and position the laser receiver on it using the cen- tre mark 16. – In order to rule out faulty calibration after completion of the calibration, you must check the levelling accuracy (see “Checking the Levelling Accuracy in the Horizontal Position”. page 44). If the deviation is still outside of the maximum permitted limit of ±3.0 mm, have the measuring tool checked by a Bosch customer service agent. Y-Axis Calibration – Mount the measuring tool in the horizontal position on a tri- pod 63 (accessory). – Place the tripod 30 m in front of the wall. The Y-axis indica- tor imprinted on the measuring tool must be pointing per- pendicular to the wall. – Switch the measuring tool on. – Wait until the measuring tool is levelled in. – Use the laser receiver to find the centre line and transfer the height “Y1” of the centre line onto the wall. – Turn the measuring tool 180° without adjusting the height of the tripod. – Wait until the out-of-level indicator 37 stops flashing and the measuring tool is levelled in. – Use the laser receiver to find the centre line and transfer the new height “Y2” of the centre line onto the wall. – Determine the exact centre between the centre lines “Y1” and “Y2” and position the laser receiver on it using the cen- tre mark 16. – In order to rule out faulty calibration after completion of the calibration, you must check the levelling accuracy (see “Checking the Levelling Accuracy in the Horizontal Position”. page 44). If the deviation is still outside of the maximum permitted limit of ±3.0 mm, have the measuring tool checked by a Bosch customer service agent. Z-Axis Calibration (GRL 500 HV) – Mark a vertical line on the wall using a plumb line. – Mount the measuring tool in the vertical position on a tri- pod 63 (accessory). – Place the tripod 5–10 m in front of the wall. – Switch the measuring tool on. – Align the tripod so that the laser beam crosses the vertical line on the wall. – Simultaneously press the calibration button 25 and the slope button 18 for approx. 2 s. The symbol for calibrating the X-axis is shown on the display. The out-of-level indicator 37 flashes dur- ing automatic levelling.

– Press the slope button 18 or 20 until the centre line indicator 43 lights up continuously. If the audio signal is switched on, a continuous tone sounds. – Press the calibration button 25 to save the calibration. The symbol for completing calibration is shown on the display. – Simultaneously press the calibration button 25 and the slope button 20 for approx. 2 s. The symbol for calibrating the Y-axis is shown on the display. The out-of-level indicator 37 flashes dur- ing automatic levelling.

– Press the slope button 18 or 20 until the centre line indicator 43 lights up continuously. If the audio signal is switched on, a continuous tone sounds. – Press the calibration button 25 to save the calibration. The symbol for completing calibration is shown on the display. – Simultaneously press the calibration button 25 and the slope button 18 for approx. 2 s. The symbol for calibrating the Z-axis is shown on the display. OBJ_BUCH-1960-005.book Page 45 Wednesday, March 28, 2018 11:41 AM46 | English 1 609 92A 4DX | (28.3.18) Bosch Power Tools – Wait until the measuring tool is levelled in. – If you do not achieve congruence, repeat the previous steps (align tripod, allow measuring tool to level in, align la- ser beam using slope buttons). – In order to rule out faulty calibration after completion of the calibration, you must check the levelling accuracy (see “Checking the Levelling Accuracy in the Vertical Posi- tion”. page 44). If the deviation is still outside of the maximum permitted limit of ±1 mm, have the measuring tool checked by a Bosch customer service agent. Working Advice The measuring tool is equipped with a radio interface. Local operating restrictions, e.g. in airplanes or hospi- tals, are to be observed. Always use the centre of the laser line for marking. The width of the laser line changes with the distance. Setting the Display of the Units The distance between rotational plane and centre line is shown on the display in [mm] or [inch: decimals/fractions]. The default setting in the delivery condition is [mm]. The setting for the units is saved when the tool is switched off. Laser Viewing Glasses (Accessory) The laser viewing glasses filter out the ambient light. This makes the red light of the laser appear brighter for the eyes. Do not use the laser viewing glasses as safety goggles. The laser viewing glasses are used for improved visualisa- tion of the laser beam, but they do not protect against laser radiation. Do not use the laser viewing glasses as sun glasses or in traffic. The laser viewing glasses do not afford complete UV protection and reduce colour perception. Working with the Tripod (Accessory) The measuring tool is equipped with a 5/8" tripod mount for horizontal operation on a tripod. Place the measuring tool via the tripod mount onto the 5/8" male thread of the tripod and screw the locking screw of the tripod tight. On a tripod 63 with a measuring scale on the elevator column, the height difference can be adjusted directly. Working with Wall Mount/Alignment Unit (Accessory) You can also mount the measuring tool to the wall mount with alignment unit 59. For this, screw the 5/8" screw 62 of the wall mount into the tripod mount of the measuring tool. Mounting to a wall: Mounting to a wall is recommended, e.g., for work above the elevation height of tripods or for work on unstable surfaces and without tripod. For this, fasten the wall mount 59, with the measuring tool mounted, as vertical as possible to a wall. For mounting to the wall, you can either fasten the wall mount 59 with fastening screw 60 to a lath (width maximal 8 mm) or hang it up with two hooks. Mounting on a tripod: The wall mount 59 can also be screwed onto a tripod with the tripod mount on the back side. This method of fastening is especially recommended for work where the rotational plane is to be aligned with a reference line. With the alignment unit, the mounted measuring tool can be moved vertically (when mounted to the wall) or horizontally (when mounted to a tripod) within a range of approx. 16 cm. For this, loosen screw 61 on the alignment unit, move the measuring tool to the desired position, and retighten screw 61 again. Working with the Measuring Rod (Accessory) (see figure H) For checking irregularities or projecting gradients, it is recom- mended to use the measuring rod 55 together with the laser receiver. A relative millimetre scale (±50 cm) is marked on the top of the measuring rod

55. Its zero height can be preset at the bot-

tom of the elevator column. This allows for direct reading of deviations from the specified height. Work Examples Checking the Depth of Building Pits (see figure I) – Position the measuring tool on a firm surface or mount it to a tripod 63. – Working with tripod: Align the laser beam to the requested height. Project or check the height at the target location. Working without tripod: Determine the height difference between the laser beam and the height at the reference point. Project or check the measured height difference at the target location. When measuring over long distances, the measuring tool should always be set up in the centre of the work surface and on a tripod, in order to reduce interferences. – When working on unstable ground, mount the measuring tool on the tripod 63. Ensure that the anti-drift system is ac- tivated in order to prevent incorrect measurements in the event of ground movements or shocks to the measuring tool. The out-of-level indicator 37 flashes dur- ing automatic levelling.

– Press the slope button 18 or 20 until the laser beam is as parallel as possible to the vertical line on the wall. – Press the calibration button 25 to save the calibration. The symbol for completing calibration is shown on the display. – Simultaneously press the measuring accuracy setting button 23 and the slope button 20 re- peatedly until the desired setting is reached. OBJ_BUCH-1960-005.book Page 46 Wednesday, March 28, 2018 11:41 AMEnglish | 47 Bosch Power Tools 1 609 92A 4DX | (28.3.18) Correction of Malfunctions Malfunctions with Error Codes The error code of a malfunction is shown on the display. – Rectify the malfunction (see “Corrective Measure”). – Afterwards, simultaneously press the centre line mode button 19 and audio signal/volume button 24. If the malfunction was successfully rectified, the error code indication goes out and automatic levelling will start (see “Automatic Levelling during Operation”, page 40). If the malfunction persists, have the measuring tool checked by a Bosch customer service agent. Error Code Indication Problem Corrective Measure 001 The X-axis of the measuring tool is outside of the self-levelling range of approx. 8.5 % (5°). – Reposition the measuring tool along the X-axis. 002 The Y-axis of the measuring tool is outside of the self-levelling range of approx. 8.5 % (5°). – Reposition the measuring tool along the Y-axis.

(GRL 500 HV) The Z-axis of the measuring tool in vertical mode is outside of the self-levelling range of approx. 8.5 % (5°). – Reposition the measuring tool in vertical mode along the Z-axis. 004 Measuring tool is at a slant of more than

8.5 % after a position change.

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