Bosch has been a power tool manufacturer for many years. Recently Bosch has become a major player is the laser level industry after purchasing Robo Toolz a few years back. In this guide I am going to look at the calibration procedure for 4 of Bosch’s rotating laser levels. The Bosch GRL 250 HV, GRL 300 HV and GRL 300 HVG green beam, all these models share the same calibration procedure.
As always 1 shall assume you know how to check calibration and know where you need to adjust calibration to. I will be concentrating on the procedure to get the laser level into calibration mode and how to make adjustments on both X and Y axis. But first a mention about the 3rd “Z” axis. This is the axis when the vertical capable rotating laser is on its side producing vertical rotation for alignment as apposed to horizontal rotation for levelling. Under the vast majority of circumstances when the X and Y axis are correctly calibrated the Z axis will automatically be correct. Under some extremely rare situations this is not the case and so the Z axis would need adjustment. This is vary rare so in this guide I will just cover the horizontal calibration.
The first thing to note is that you will need to have the Bosch RC1 remote control to calibrate these models. It may be that you did not get this when you purchased your laser, not all packages included it. In the case of professional calibrators you may need to purchase one of these remotes to add to your collection.
The next thing we need to know is the alignment of the two axis. The image below indicates the axis direction for these Bosch models. When looking at the control panel the X axis will be left to right. Y axis being front to back in relation to the control panel.
Entering into calibration mode is achieved by pressing buttons on the laser level itself, not the remote. To enter calibration mode press the “Shock” button and “Scan” button simultaneously then whilst still holding these two buttons press and release the red “Power” button and also release the first two buttons. The LED light under the power button should now be flashing slowly indicating that the laser is in calibration mode and X axis is ready to adjust. Note you may need to try this process a couple of times to get the timing right.
To switch axis, make adjustments and save calibration you will need to use the remote control RC1.
The top right button on the remote switches the axis you wish to adjust. The X axis is selected the Power LED on the laser’s control panel will flash. When Y axis is selected the LED beneath the Shock (TILT) button will flash.
The bottom two buttons on the remote adjusts the beam up or down. Note depending on which way the laser is pointing at your target the Up and Down may be reversed.
So using these buttons adjust each axis to the correct height. I prefer to work on one axis at a time so once I’ve got the X axis correct then I would save this into the laser. Depending on how you have you calibration space set up you can do both axis before saving if you prefer.
To save calibration to the new levels you have set press the top left button on the remote. If you want to abort without saving simply power down the laser by pressing the red power button.
Thats it you should be done, go back and check both axis again and make further adjustments if needed.
As always the Laser Level Review does not take any responsibility for your actions whilst using our guide. If you are at all unsure do not attempt to re-calibrate your laser and send it to a laser level service centre.
Had experience of these models and have anything to add please comment at the bottom of this page.
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