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Message ID: 583     Entry time: Wednesday, May 10, 2017, 15:07
Author: Aaron Schmidt 
Target/No.#:  
Source:  
Station:  
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Target Oven W.O#:  
Heat Shield W.O#:  
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Subject: Pump down empty chamber. (FS#3 out) 

FS#3 lines blanked off.

Wednesday, May 10, 2017, 14:40: Roughing

Wednesday, May 10, 2017, 15:05: Turbos on.

Wednesday, May 10, 2017, 15:10: Ion gauge on.


Disconnect Leak detector. Connect He to FS#3 (G) line.

Thursday, May 11, 2017, 07:44: RGA on.

Thursday, May 11, 2017, 08:23: Vacuum @ 1.85e-06T. He line pressurized to 50 PSI. Monitor RGA.

Thursday, May 11, 2017, 09:07: No response on RGA. Vacuum @ 1.85e-06T. Purge Helium.

Hook up dry system leak detector to leak check valve behind turbo.

Leak rate: 0.0e-09 atm-cc/sec on detector. T.P: 0.0e-04T.

Thursday, May 11, 2017, 09:18: Open check valve. Vacuum ok @ 1.76e-06T

Base leak rate: 2.5e-09 atm-cc/sec.

Thursday, May 11, 2017, 09:25: Open He & Pressurize to 50 PSI.

Thursday, May 11, 2017, 09:30: Base leak rate dropping slowly: 2.0e-09 atm-cc/sec. No leak detected. No response on RGA.

Thursday, May 11, 2017, 09:35: Base leak rate dropping slowly: 1.7e-09 atm-cc/sec. No leak detected. No response on RGA.

Thursday, May 11, 2017, 09:45: Base leak rate Ok: 1.7e-09 atm-cc/sec. No leak detected. No response on RGA. Close check valve. Purge line. Vent detector.

Leak detector on. Leak rate: 0.0e-09 atm-cc/sec on detector. T.P: 0.0e-04T.

Thursday, May 11, 2017, 13:24: Open check valve. Vacuum @ 1.41e-06T

Base leak rate: @.2.0e-09 atm-cc/sec.

Thursday, May 11, 2017, 13:30: Open He & Pressurize to 50 PSI.

Thursday, May 11, 2017, 13:37: Base leak rate dropping slowly: 1.0e-09 atm-cc/sec. No leak detected. No response on RGA.

Thursday, May 11, 2017, 13:40: Base leak rate Ok: 0.1e-09 atm-cc/sec. No leak detected. No response on RGA. Vent He.

Connect spray nozzle to He. Vacuum issue noticed on RGA: N & O. Check for leak on Chamber


Tuesday, May 16, 2017, 08:45: RGA off. Ion gauge off. Turbos off

Tuesday, May 16, 2017, 09:50: Venting

Attachment 1: 05-11-2017_Water_leak.docx  859 kB  Uploaded Thursday, May 18, 2017, 09:43
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