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Entry  Wed Sep 23 08:57:18 2020, gautam, Update, VAC, TP2 running HOT Screen_Shot_2020-09-23_at_8.55.39_AM.png
    Reply  Wed Sep 23 10:06:52 2020, Koji, Update, VAC, TP2 running HOT Screen_Shot_2020-09-23_at_10.00.43.png
Message ID: 15600     Entry time: Wed Sep 23 10:06:52 2020     In reply to: 15599
Author: Koji 
Type: Update 
Category: VAC 
Subject: TP2 running HOT 

Here is the timeline. This suggests TP2 backing RP failure.

1st line: TP2 foreline pressure went up. Accordingly TP2 P, current, voltage, and temp went up. TP2 rotation went down.

2nd line: TP2 temp triggered the interlock. TP2 foreline pressure was still high (10torr) so TP2 struggled and was running at 1 torr.

3rd line: Gautam's operation. TP2 was isolated and stopped.

Between the 1st line and 2nd line, TP2 pressue (=TP1 foreline pressure) went up to 1torr. This made TP1 current increased from 0.55A to 0.68A (not shown in the plot), but TP1 rotation was not affected.

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