Bosch LR40, Operating/Safety Instructions Manual

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Starting operation

u

  Protect the laser receiver against mois-

ture and direct sunlight.

u

  Do not subject the laser receiver to ex-

treme temperatures or variations in tem-

perature. As an example, do not leave it in 

vehicles for longer periods. In case of large 

variations in temperature, allow the laser 

receiver to adjust to the ambient tempera-

ture before putting it into operation. In case 

of extreme temperatures or variations in 

temperature, the accuracy of the laser re-

ceiver can be impaired.

Setting up the laser receiver (see figure A)
Position the laser receiver so that the laser 

beam can reach the reception area (1). Align 

it so that the laser beam runs straight through 

the reception area (as shown in the figure).
For rotary lasers with multiple operating 

modes, select the horizontal or vertical opera-

tion with the highest rotational speed.
Switching On/Off

u

 A loud audio signal sounds when switch-

ing on the laser receiver. Therefore, keep 

the laser receiver away from your ear or 

other persons when switching it on. The 

loud sound can damage hearing.

To  switch on the laser receiver, press the 

on/off button (19). All display indicators and 

all LEDs light up briefly and an audio signal 

sounds.
To  switch off the laser receiver, press and 

hold the on/off button (19) until all LEDs 

briefly light up and the display goes out. All 

settings are saved upon switching off. Except 

the display backlight setting. It is always on 

when turning the receiver on.
If no button on the laser receiver is pressed 

for approx. 10 min and no laser beam reaches 

the reception area (1) for 10 min, then the la-

ser receiver will automatically switch itself off 

to preserve battery life.
Connection to the rotary laser (only with 

GRL4000-80)
In the default factory setting, the rotary laser 

and the supplied laser receiver are already 

connected via Bluetooth®. For the existing 

connection, the Bluetooth® connection indi-

cator (b) appears in the display of the laser 

receiver.

In order to reconnect the laser receiver or 

connect another laser receiver with the rotary 

laser, start the connection setup on the rotary 

laser. To do this, consult the operating in-

structions for the rotary laser. Then press the 

X-axis button (16) and the Y-axis button (15) 

on the laser receiver at the same time for five 

seconds. Confirmation as to whether a con-

nection has successfully been established will 

be shown on the display of the rotary laser.
If the connection between the rotary laser 

and the laser receiver cannot be established, 

PNK will appear in the text display (e) of the 

laser receiver. For troubleshooting, consult 

the operating instructions for the rotary laser.
Direction indicators
The position of the laser beam in the recep-

tion area (1) is indicated as follows:
–  On the display (5) on the front and rear of 

the laser receiver by means of the “laser 

beam below center line” direction indica-

tor (f), the “laser beam above center line” 

direction indicator (j) and the center line 

indicator (h)

–  Optionally, by means of the red “laser beam 

below center line” LED direction indicator 

(4), the blue “laser beam above center line” 

LED direction indicator (2) and the green 

center line LED (3) on the front of the laser 

receiver

–  By an audio signal (optional).
On the first pass of the laser beam through 

the reception area (1) a short audio signal al-

ways sounds and the red “laser beam below 

center line” LED direction indicator (4) and 

the blue “laser beam above center line” LED 

direction indicator (2) briefly light up (even if 

the audio signal and/or LED direction indica-

tors have been switched off).
Laser receiver too low: If the laser beam hits 

the upper half of the reception area (1), then 

the “laser beam above center line” direction 

indicator  (j) appears in the display. If the 

LEDs are switched on, the blue “laser beam 

above center line” LED direction indicator (2) 

lights up. If the audio signal is switched on, a 

signal sounds in a slow rhythm.
Move the laser receiver upwards in the di-

rection of the arrow. When the laser beam is 

close to the center line, only the tip of the “la-

ser beam above center line” direction indica-

tor (j) is shown.

Operation

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