2. Maintain 182 C (360ºF) +/- 1 C (2ºF) and a vacuum pressure not to exceed 10-6 torr for 48 hours. 3. Cool down in vacuum at rate not to exceed 3 C/min (5ºF/min). Handling of parts out of the vacuum oven is particularly critical. It should be performed with clean tools and/or gloved hands (Latex gloves only). Gloves must be changed for new ones, should operators touch anything other than the parts or the packaging material. 4. After cool down, perform an RGA measurement (per LIGO-E960022). RGA test results shall indicate an out-gassing rate (for AMU components 41, 43, 53, 55 and 57) of 2 x 10-12 torr-liters/cm2/s requirement. If necessary based on RGA test results, re-bake for an additional 24 hours and repeat the RGA analysis. Repeat the last step until satisfactory RGA results are achieved O-rings (ie. in EQ stop applications) Bake in vacuum for 48 hours at 120 C. (To Class B ultrasonic clean in DI water for 10 minutes, air bake at 120 Cfor – 48 hours.) VE Seals and O-rings: (less than 8” diameter with cross section .275” nominal) ≤ Bake in vacuum for 48 hours at 120 degrees C. Wipe with isopropanol thoroughly immediately before each use. VE Larger diameter O-rings (ie. for VE chamber doors) Process per LIGO document: E960159-01-V Vacuum bake at 150 C for 48 hours. Storage of Fluoroelastomers the above fluorine extraction and baking steps have been performed, either: seal the items in Class B paint cans backfilled with dry N2, or seal the items double bagged with a desiccant between bags. Masterbond EP30-2 (Vacseal replacement) Assemblies glued with EP30 should be cured and vacuum baked as per E1000386. Note some assemblies can be found in the Assemblies section below instructions there take precedence over these basic instructions for – EP30.
2. Maintain 182 C (360ºF) +/- 1 C (2ºF) and a vacuum pressure not to exceed 10-6 torr for 48 hours. 3. Cool down in vacuum at rate not to exceed 3 C/min (5ºF/min). Handling of parts out of the vacuum oven is particularly critical. It should be performed with clean tools and/or gloved hands (Latex gloves only). Gloves must be changed for new ones, should operators touch anything other than the parts or the packaging material. 4. After cool down, perform an RGA measurement (per LIGO-E960022). RGA test results shall indicate an out-gassing rate (for AMU components 41, 43, 53, 55 and 57) of 2 x 10-12 torr-liters/cm2/s requirement. If necessary based on RGA test results, re-bake for an additional 24 hours and repeat the RGA analysis. Repeat the last step until satisfactory RGA results are achieved O-rings (ie. in EQ stop applications) Bake in vacuum for 48 hours at 120 C. (To Class B – ultrasonic clean in DI water for 10 minutes, air bake at 120 Cfor 48 hours.) VE Seals and O-rings: (less than 8” diameter with cross section ≤ .275” nominal) Bake in vacuum for 48 hours at 120 degrees C. Wipe with isopropanol thoroughly immediately before each use. VE Larger diameter O-rings (ie. for VE chamber doors) Process per LIGO document: E960159-01-V Vacuum bake at 150 C for 48 hours. Storage of Fluoroelastomers the above fluorine extraction and baking steps have been performed, either: seal the items in Class B paint cans backfilled with dry N2, or seal the items double bagged with a desiccant between bags. Masterbond EP30-2 (Vacseal replacement) Assemblies glued with EP30 should be cured and vacuum baked as per E1000386. Note some assemblies can be found in the Assemblies section below – instructions there take precedence over these basic instructions for EP30.
E960022-v24.docx