D047823- L4C Vacuum Chamber top

Document #:

LIGO-D047823-v6

Document type:

D - Drawings

Abstract:

Chamber, side port L4-C seismometer

Files in Document:

• D047823 L4C Vacuum Chamber top.PDF (312.4 kB)

Other Files:

• D047823 L4C Vacuum Chamber top.SLDPRT (722.0 kB)

ICS/JIRA Record:

• ICS_LINK

Topics:

• Seismic Isolation
• Final Design

Authors:

• Sam Barnum
• Fabrice Matichard

Notes and Changes:

D047823-v6 L4C Top
- Changed flange flatness tol to .005" from .001"
- Added note 22 for tubing to flange welds.
- Removed note 17 from tubing to flange welds
- Removed Datum C. Tolerance call-outs have be changed to conform to the "simultaneous requirement" condition laid

out in ASME Y14.5. Thus Datum C can be removed without removing the features relationship.
"In the 1994 ASME standard, this is spelled out in paragraph 5.3.6.1 (or 7.5.4.1 of the 2009 edition): "Where

multiple patterns of features are located relative to common datum features not subject to size tolerances, or to

common datum features of size specified on an RFS basis they are considered to be a single pattern."

Related Documents:

• LIGO-E1000171-v2: DCN For Pod Tops and Base Flanges, Trillium, GS-13, L4C

Referenced by:

• LIGO-E1000171-v2: DCN For Pod Tops and Base Flanges, Trillium, GS-13, L4C
• LIGO-D047820-v4: L4C Seismometer Pod Assembly