The most critical section of the Käyttöohje is the calibration routine. Do not skip this.
Step-by-step from the manual:
Before turning on the scale, ensure the platform is stable and level. The WB900 often comes with adjustable feet. Use the bubble level (usually on the indicator or column) to ensure the scale is perfectly horizontal. lahti precision wb900 kayttoohje best
Before powering on the WB900, the manual emphasizes these mechanical checks: The most critical section of the Käyttöohje is