While the US site pushes new products, the European service centers sometimes keep legacy FTPs active. Search Mitutoyo Europe Service Manuals.
European users often have better luck with the German or UK Mitutoyo sites, which maintain extensive PDF archives for discontinued models like the SV-400. mitutoyo surftest sv400 user manual full
Mitutoyo has reorganized their support portal several times over the last two decades. The SV-400 uses a specific controller (often the SA-941 or similar) and a dedicated amplifier. General surface roughness guides won't help you here. While the US site pushes new products, the
Pro Tip: When searching, don't just search for "SV-400." Try searching for the Specific Kit Model Number. The SV-400 was often sold as a system including: mitutoyo surftest sv400 user manual full
The manual highlights several "Best Practices" that users frequently overlook: