Calibration Procedure for the Hilti PR25
To calibrate the Hilti PR25 you will also need the receiver that came with the level, usually the PRA 25.
The receiver needs to be located exactly level to what the calibration should be for the laser. For the purpose of this guide, we will assume you know the principles of checking the calibration and so know where the calibration height should be. A separate guide will describe methods for checking calibration.
Calibration Method
So the laser is set up with the axis you require to calibrate facing the receiver and the receiver set at the optimum height. To enter calibration mode on the PR25 Laser’s control panel Press and HOLD both the “X+” and “X-” buttons. Then while still pressing these two buttons press the Power Button, keep pressing the “X+” and “X-” buttons for 1 to 2 seconds.
Next press in sequence the following buttons “X-“, then “Y+”, then “Shock Warning Button” (top left has a picture of laser level with line through it), then “Power”, then “Y-“
The light under the “Shock Warning Button” should be lit and you are now in calibration mode. If the light is not on then power off and start the process again. It’s probably the longest, most complicated button sequence on any laser level so it may take a few goes.
At this point, the laser should light up and the beam rotates. however, it is a known issue on this model that it does not always do this. So a trick is to press the “Change Rotation Speed” Button (arrows going around in a circle) on the RECEIVER which will need to be powered up at this point. The laser should now be spinning.
Changing Axis
Next using the receiver which is located at the correct height for calibration press either the “X” or “Y” button on the receiver. The one you press should correspond with the axis facing the receiver. The “X” or “Y” indicator should show on the receiver.
To adjust the height of the laser press either the “Left Arrow” or “Right Arrow” buttons on the receiver. Press the button repeatedly to shift the height of the laser beam. You may have to change to the other arrow button if it is heading in the wrong direction. Hint do not press the button too quickly as this can confuse the process. Once the laser is at the level point on the receiver, the correct height, you need to save this calibration height into the laser level. This is done by pressing the “Power” button on the LASER LEVEL.
Power the laser up and check that this new height has been saved. You can then repeat the calibration of for the other axis if required.
If anyone has any further hints or observation please comment below.
As always if in any doubt do not attempt calibrating and send to a laser level calibration specialist. The Laser Level Review takes no responsibility for any calibration you may perform on your laser following these instructions.
If you have found this or other posts on this site helpful please consider a donation.
About Author
but for the z axis?
That is a very good question. I have never needed to adjust the Z axis on this model. It may well be the case that as long as the X and Y are good then the Z is automatically good (assuming no significant physical drop damage). For anyone not knowing what we mean by the Z axis, it refers to a laser that also provides vertical alignment. In the case of the PR25 when operating on its side for vertical rotation. If anyone can add anything about the Z axis and the Hilti PR25 please feel free to comment.
Mark numbers from 1 to 5 in front of those buttons with erasable ink and then just follow the numbers it is easier than to remember the sequence.
Nice trick. Thanks.
In my case..: When in calibration mode Shock Warning Button blinks. To calibrate y axis I had to hold “-y button” on laser to make y mark appear on the receiver and than I could press left and right arrow on receiver to calibrate.
Hi thanks for your input, hopefully this will help out others having similar problems.
I had no success in this procedure and after one attempt. All the lights starting flashing on both receiver and laser. And the receiver would not stop beeping. The laser is locked in this mode and shutting it off does not help.
Hi jtown54 I’ve not come across this error before either personally or through feedback. I don’t know what the fault is but it sounds like some sort of master alarm. One thing I would do to try and clear it is to remove the battery from both laser and receiver for a few hours or over night and then replacing them and seeing if that clears the alarm. Other than that just make sure both batteries have plenty of charge. That’s about all I can think of at this stage. Perhaps another visitor to this site might have some insights to this. I hope this clears the alarm for you, if not, it will probably need to go to Hilti as it may well be a logic problem with the main circuit board something only Hilti can remedy. In the mean time if I get any answers through the site or my contacts I’ll let you know here in the comments.