Calibrate XT20/XT22 electronic levels horizontally

You can calibrate the electronic levels on the XT20/XT22 laser transmitter. This is done at factory, but should be redone prior to a job, if you want to measure with respect to the horizontal (or vertical) level. By calibrating the electronic levels and then using them to level the laser transmitter, you can achieve an absolute leveling of the laser plane of approximately ± 0.02 mm/m [4 arc sec].

Start the Calibration program (only applicable to horizontal levels) via the app Context menu > "Calibrate X&Y" and follow the instructions. The app will guide you through the calibration procedure. After each step in the procedure, tap to proceed to next step.

When you start the calibration sequence, the previous calibration settings of both horizontal electronic levels will be cleared, and the levels will return to their factory calibration settings. When the full calibration sequence has been completed, the new calibration settings calculated from the calibration procedure will be used in the electronic levels.

Before starting the calibration procedure, connect detector and laser transmitter.

NOTE! App calibration program is only applicable to horizontal levels.

NOTE! Place laser transmitter according to the orientation shown in the animation. Always start with the X direction when calibrating horizontally.

NOTE! Only XT70 detector can be used when calibrating the XT20/22 laser transmitter.

Self instructing Calibration guide in the app.

Calibrate first electronic level

  1. Place the laser transmitter [A] on a flat, clean and stable surface. Tap to start calibration sequence.
  2. Mark base of laser transmitter. Tap .
  3. Level the laser transmitter according to both electronic levels by using the tilt screws [B]. Tap .

 

Zero set

  1. Place the detector [C] at a distance of minimum 1 m, but preferably 5-10 m, and center the detector to the laser beam, within 0.5 mm horizontally, by moving the detector. Do not touch the laser transmitter. Tap . Zero setting of value is done automatically by the app.



Index and level

  1. Rotate laser transmitter body 180º (laser transmitter positioned according to marking in step 2). Tap .
  1. Level the laser transmitter according to the electronic levels by using the tilt screws [D]. Tap .
  2. Use fine adjustment knob [E] (highlighted in the app) on the laser transmitter to center the laser beam horizontally, within 0.5 mm, on the detector. Do not touch the detector. Tap . Halving of value is done automatically by the app.

 

Adjust value

  1. Fine adjust the V-value of the detector PSD to 0.00 by using the tilt screw [F] (highlighted in the app) on the laser transmitter. Tap to calibrate.

 

Calibrate level

  1. The zero point of the electronic level is now auto calibrated. Tap .

 

Calibrate second electronic level

  1. Rotate laser transmitter body 90º. Tap .
  2. Repeat step 3–9.


Verification of calibration accuracy

  1. After both levels have been calibrated, the accuracy of the calibration can be verified (optional). Tap to proceed to the verification procedure and follow the instructions in the app.
    To exit the calibration procedure without verification, press the button in the upper left corner to return to the main program.