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Message ID: 4258     Entry time: Mon Feb 7 21:23:11 2011
Author: rana 
Type: Configuration 
Category: PSL 
Subject: PSL FSS Temperature Sensor Interface box removed 

I noticed that the RMTEMP channel was spiking myteriously when Kiwamu opened the PSL door. We found out that the LEMO connectors would intermittently short to the case and cause ~1 deg steps in the temeprature.

We have removed the case and examined it. Not only were the connections to the box intermittent, there was a cold solder joint inside on an unsecured flying add-on opamp. The whole thing is a giant hack.

PK was the last person to work on this box, but I'm sure that he wouldn't have left it in this state. Must be gremlins.

P2070555-1.JPG

The LEMO connectors on the front are the ones touching. The LT1021 is the badly soldered part.

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