# Starting Operation of the rotary laser

- Keep the work area free from obstacles that could reflect or obstruct the laser beam. For example, cover any reflective or shiny surfaces. Do not measure through panes of glass or similar materials. The measurements may be distorted by a reflected or obstructed laser beam.

- Only the centre of the laser point or laser line must be used for marking. The size of the laser point/the width of the laser line changes depending on the distance.

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Horizontal position

Vertical position

1. Position the measuring tool on a stable surface in the horizontal or vertical position, mount it on the tripod (43) or on the wall mount (44) with the alignment unit.

Ensure that the measuring tool is stable to avoid interruptions in operation caused by re-levelling. Due to its high levelling accuracy, the measuring tool is very sensitive to knocks and vibrations and changes in position.

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The main functions of the measuring tool are controlled by the buttons on the measuring tool and the remote control (40). Additional functions are available via the remote control (40), the laser receiver (41), or via the Bosch Levelling Remote App .

see Overview of control options for the functions

For the indicator on the measuring tool's display (15), the following applies:

- The current settings for this function will be indicated when a function button (e.g button) is pressed for the first time. The settings will be changed the next time a function button is pressed.
- In the lower part of the display, softkey symbols (i) are shown in various menus. The corresponding function keys (softkeys) arranged around the display can be used to execute the functions represented by the symbols (i) (see figure ). Depending on the corresponding menu, the symbols show the usable function buttons (e.g. the button in the rotational operation menu) or additional functions such as Next (), Back () or Confirm ().
- The softkey symbols (i) also make it easy to recognise whether the and buttons in the current menu are used to slope downwards () or slope upwards () or to turn clockwise () or anticlockwise ().
- The display will automatically go back to the start screen five seconds after the last press of a button.
- The display (15) will light up with every press of a button or signal that reaches the measuring tool. The light will go out approximately one minute after the last press of a button.

Tilting or rotation in various functions can be accelerated if the respective tilting or rotation buttons on the measuring tool or the remote control are held down for longer.

All functions are reset to their standard setting when the measuring tool is switched off.

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Carry out an accuracy check before starting operation and before beginning work see Accuracy Check and Calibration of the Measuring Tool.

## Switching on

1. Press the button to switch on the measuring tool.
2. A start sequence will appear for a few seconds, followed by the start screen.
3. The measuring tool emits the variable laser beam (8) and the upwards plumb point (10) from the outlet apertures (9).

The levelling starts automatically and is shown by the flashing symbol for levelling in the display, the flashing laser beams and the status indicator (12) that is flashing green see Automatic Levelling.

After levelling has successfully been completed, the start screen will appear, the laser beams will light up continuously, rotation will start and the status indicator (12) will light up green continuously.

## Switching off

1. Press and hold the button until the switch-off symbol appears on the display to switch off the measuring tool.

If the maximum permitted operating temperature of 50 °C is exceeded, a warning message will appear for a few seconds and the status indicator (12) will flash red.

The measuring tool will then shut down in order to protect the laser diode. Once it has cooled down, the measuring tool is operational again and can be switched back on.

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In the default factory setting, the measuring tool and the remote control (40) and laser receiver (41) supplied are already connected via Bluetooth®.

1. Press and hold the button until the symbol for establishing a connection with the remote control/laser receiver appears on the display to connect the remote control or laser receiver.

1. To establish a connection to the remote control, press and hold the button and the button on the remote control until the status indicators (33) and (34) start to flash.
2. While the connection to the remote control is being established, the status indicators on the remote control will alternately flash green.

1. To establish a connection to the laser receiver, press and hold the and buttons on the laser receiver simultaneously until the message that a connection has been established appears on the display of the laser receiver.

see Connection to the Rotary Laser

It will be confirmed on the display whether a connection has successfully been established to the remote control or the laser receiver.
If the attempt to establish a connection to the remote control is successful, the status indicators (33) and (34) on the remote control will light up green for 3 s.

If no connection could be established, an error message will appear on the display.
If the attempt to establish a connection to the remote control is not successful, status indicators (33) and (34) on the remote control will light up red for 3 s.

Two laser receivers can be connected to and work with the measuring tool at the same time.

If other remote controls or laser receivers are connected, the oldest connection will then be deleted.

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The measuring tool is equipped with a Bluetooth® module which uses radio technology to enable remote control via a smartphone with a Bluetooth® interface.

The Bosch Levelling Remote App is required to use this function. You can download this in the app store for your terminal device (Apple‌ App Store, Google‌ Play‌ Store). Scan the adjacent QR code.

Information on the necessary system requirements on the smartphone can be found in the technical data of the measuring tool.

When controlling remotely via Bluetooth®, poor reception conditions can cause time delays between the smartphone and the measuring tool.

The Bluetooth® function for remote control via an app is switched on by default on the measuring tool and can be deactivated using the button.

1. Press the button to switch off Bluetooth® for remote control via the app.
2. The Bluetooth® connection indicator (c) will go out on the start screen.

1. Briefly press the button to switch on Bluetooth® again for remote control via the app.

1. The symbol for establishing a connection to the smartphone will appear on the display.

Ensure that the interface for Bluetooth® is activated on your mobile device.

It will be confirmed on the display whether a connection has successfully been established. The existing connection is visible on the Bluetooth® connection indicator (c) on the start screen.

If no connection could be established, an error message will appear on the display.

The connection between the smartphone and measuring tool is established after starting the Bosch Levelling Remote App. If multiple active measuring tools are found, select the appropriate measuring tool. A connection will be established automatically if only one active measuring tool is found.

The Bluetooth® connection may be interrupted if the distance between the measuring tool and the mobile device is too great or is blocked, and if there are any sources of electromagnetic interference. In this case, another attempt to establish a connection will automatically begin.

By pressing the button, you can only control the Bluetooth® function for the connection to a smartphone. The measuring tool independently transmits a signal via Bluetooth® for the connection to the remote control/laser receiver. You can only stop this signal by switching off the measuring tool (or removing the batteries from the remote control or the laser receiver).

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During breaks from work, you can set the measuring tool to sleep mode. All your settings will still be saved.

1. Briefly press the button.
2. Press the button in the menu which subsequently appears repeatedly until you have selected sleep mode.
3. Confirm your selection with by pressing the button.

Alternatively, you can switch on sleep mode by pressing the button on the remote control.

When sleep mode is switched on, the sleep mode symbol will be indicated on the display. The status indicator (12) will slowly flash green. The shock-warning function will remain activated and all settings will be saved.

1. Briefly press the button on the measuring tool or the button on the remote control to switch off sleep mode.

You can also switch off the measuring tool while it is in sleep mode. To do this, press and hold the button until the switch-off symbol appears on the display. All other buttons on the measuring tool and the remote control will be deactivated.

It is also possible to switch sleep mode on and off via the Bosch Levelling Remote App.

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The keyboard of the measuring tool and the remote control can be locked via the Bosch Levelling Remote App. The keyboard lock symbol will appear on the measuring tool's display.

The keyboard can be unlocked as follows:

- via the Bosch Levelling Remote App,
- by switching the measuring tool on and off via the button
- or by pressing the and buttons on the measuring tool at the same time.