I have trained operators on the SV-400 for years. The manual covers the safety warnings and part names, but here is the tribal knowledge:
The manual begins with standard safety icons and warnings. Key points emphasized include: mitutoyo surftest sv400 user manual full
Check the "Detector Lift" mechanism. The SV-400 has an automatic lift system. If the lift is not fully lowering, you need to clean the air cylinder or adjust the lift timing parameter (found on page 4-23 of the manual). I have trained operators on the SV-400 for years
The SV-400 supports both and Skidless measurement modes. mitutoyo surftest sv400 user manual full