Vibration Isolation Case Studies

DVIA-UB700 (S/N 221024R5) inspection report for ZEISS FE-SEM Sigma 300 at Hanyang University, Natural Sciences Building, Room 112. Turned on/IDLE measurements: vertical, left-to-right, and front-to-back VC curves, autospectra, and transmissibility. LPF tuning on left-to-right and front-to-back removed initial active-mode oscillation; all directions meet vibration specification at pass levels shown in the measurement summary.

DVIA-ULF1000 (S/N 250813R2) at Huasheng Lianying Vibration Damping Platform, Wuxi (YIDONG FE-SEM YF-1801). Tuning 2025-12-29; report written 2026-01-07; 7th trial. Overview and measurement plots from Installation Report DOCX (WebP). Decorative header image and Reference EMF omitted per site rules (Reference uses the standard VC markdown table only).

DVIA-ULF1500 (S/N 250815R2) installation and vibration measurement at a Tier-1 Semiconductor fab DSR C Tower research lab for ZEISS VersaXRM 730. VC curves, autospectrum, and transmissibility (vertical, left-to-right, front-to-back) with equipment Turned on/IDLE.

DVIA-ULF700 (serial 251212R1) tuning and vibration measurements with ZEISS FE-SEM Sigma 360 — End User and Location not disclosed in the report form (N/A). Publishes allowable-vibration specification figure, VC and transfer-rate plots for Vertical, Left to Right, and Front to Back (no separate Autospectrum screenshots in the source file despite section headings), equipment photo, and markdown VC Reference. Report written January 7, 2026.

DVIA-ULF1500 (serial 250904R1) at J&L Tech Ansan Branch R&D lab: PASS/floor-vs-table VC summary, nine VC / autospectrum / transmissibility plots, and generic VC criterion table reference.

ZEISS Sigma 360 DVIA-ULF700 Installation Report