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Entry  Sun May 30 13:26:07 2010, rana, kiwamu, Update, PSL, new HIGH-LOW value for PMC_TRANS 
    Reply  Tue Jun 1 20:40:03 2010, Koji, Update, PSL, new HIGH-LOW value for PMC_TRANS 
Message ID: 3028     Entry time: Tue Jun 1 20:40:03 2010     In reply to: 3014
Author: Koji 
Type: Update 
Category: PSL 
Subject: new HIGH-LOW value for PMC_TRANS 

The alarm had kept crying. I reduced the LOW to be 0.90 and the LOLO to be 0.85 both in psl.db and with ezcawrite.

Quote:

We changed the HIGH/LOW values of the PMC_TRANS.

The edited file was updated on the svn.


Since the PMC_TRANSPD was replaced behind the pzt mirror (see the entry), its nominal value were reduced to something like ~1V from the previous value of ~2V.

In the medm screen C1PSL_PMC.adl the PMC_TRAN always indicated red because the value were low compared with the previous one.

We went to /cvs/cds/caltech/target/c1psl, then edited psl.db

- Here are the new parameters we set up in the file.

grecord(ai,"C1:PSL-PMC_PMCTRANSPD")
{

  field(LOW,"0.98")
  field(LOLO,"0.93")
  field(HIGH,"1.15")
  field(HIHI,"1.3")

}

- - - -

These values are based on ~4days trend of the PMC_TRAN.

Then we manually updated those numbers by using ezcawrite in order not to reboot C1PSL.

So now it nicely indicates green in the medm screen.

 

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