Accuracy Check
Regularly check the accuracy of the grade measurement and distance measurement.
- To do this, lay the measuring tool on a table and measure the inclination.
- Turn the measuring tool by 180° and measure the inclination again.
- The difference between the displayed values must not exceed 0.3°.
In case of greater deviation, the measuring tool must be recalibrated.
- Press and hold the
button to call up the Basic functions menu. - Select
and confirm the selection with the button. - Follow the instructions on the display.
- After strong temperature changes and after knocks, we recommend an accuracy check and, if necessary, calibration of the measuring tool. After a temperature variation, the measuring tool must adjust to the ambient temperature for a while before calibration is performed.
For the accuracy check, the measurement should be taken under favourable conditions, i.e. the measuring section should be indoors and the target surface for the measurement should be smooth and reflect well (e.g. a white-painted wall).
- Select a measuring section of approx. 3 to 10 m long, the length of which you know exactly (e.g. room width, doorway).
- Measure the section 10 times in succession.
- The deviation of individual measurements from the exact known value may be maximum ±2 mm throughout the entire measuring section under favourable conditions. Log the measurements, so that you can compare their accuracy at a later point of time.
Regularly check the accuracy of alignment of laser and target display.
- To do so, select a light surface with lighting as weak as possible (e.g. a white wall) at a distance of at least 5 m as a target.
- On the display, check whether the laser point is within the target display.
- If the laser point is not within the target display, you must recalibrate the target display.
Recalibrating Target Display
- Press and hold the button to get to the Basic functions menu.
- Select
and confirm the selection with the . - Follow the instructions on the display.