<!-- Title: 09:15:57  Mon Jul 22 2002 -->
<!-- Crewchief: M Mattson -->
<!-- Op1: &nbsp; -->
<!-- Op2: &nbsp; -->
<!-- Op3: &nbsp; -->
<!-- Op4: &nbsp; -->
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<!-- Notes: -->
New Week  


<!-- Date: Mon Jul 22 09:41:07 2002 -->
Still looking at pcal03, slot 17, channel 3.  Rick is available to lend his experience.<br> 
<br> 
Over the weekend, YMON tower plots still showed zero occupancy.  Also qietest pedestal on friday showed low value (8 counts).<br> 
<br> 
This morning, logged onto pcal03 (with Rick guiding).  Rebooted, ran qietest calibration, with the following message: 
<pre> 
No failures and no warnings.  
</pre> 
Proceeded to run qietest pedestal, with the following results: 
<pre> 
   17    3    0    1000   0.0      162.3   1.5 
   17    3    1    1000   0.0      161.4   1.5 
   17    3    2    1000   0.0      160.7   1.5 
   17    3    3    1000   0.0      161.6   1.5 
</pre> 
So the electronics appear to be operating, although the pedestal is lower than previously seen (around 180).<br> 
<br> 
We both agree that trying to diagnose an intermittant problem is a pain.  (If it is working, how do you know if you have fixed the problem?)<br> 
<br> 
The gut feeling is that it is an intermittant connection, in which case Willis and Howard will need to be called in.  In any case, there is a three hour access.  I will check the electronics (ADMEM, CAFE card connections, transistion board protection diode) to see if anything will help.  
  
<!-- Author: M Mattson, R Tesarek -->


<!-- Date: Mon Jul 22 12:05:21 2002 -->
<br> 
Went downstairs on supervised access.<br> 
<br> 
Checked the pedestals before going in. 
<pre> 
   17    3    0    1000   0.0      156.7   1.4 
   17    3    1    1000   0.0      156.0   1.4 
   17    3    2    1000   0.0      155.5   1.4 
   17    3    3    1000   0.0      156.3   1.4 
</pre> 
Took out ADMEM board.  Reseated the CAFE card, and put the ADMEM back in.  Took pedestals.  Different, but still low. 
<pre> 
   17    3    0     400   0.0      167.7   1.5 
   17    3    1     400   0.0      167.1   1.6 
   17    3    2     400   0.0      166.9   1.9 
   17    3    3     400   0.0      166.9   1.8 
</pre> 
Took out transistion board.  Measured diode resistance.  Normal (5.9 Mohms, compared to 5.5, 5.8 Mohms for other channels).  Reseated transistion board.  Took pedestals. 
<pre> 
   17    3    0     400   0.0      185.7   1.4 
   17    3    1     400   0.0      185.3   1.3 
   17    3    2     400   0.0      184.7   1.5 
   17    3    3     400   0.0      185.4   1.7 
 </pre> 
Back to normal, but we didn't do anything.  (Unless there was a dirty connection with the boards.)
<!-- Author: M Mattson, R Tesarek, Z Huang -->


<!-- Date: Mon Jul 22 13:30:56 2002 -->
<b>Routine Electronics Checkout</b><BR> 
<b>Plug calorimeter</b><pre> 
tmp/b0pcal00.tmp: ### Crate: b0pcal00 -- All ok! 
tmp/b0pcal01.tmp: ### Crate: b0pcal01 -- All ok! 
tmp/b0pcal02.tmp: ### Crate: b0pcal02 -- All ok! 
tmp/b0pcal03.tmp: ### Crate: b0pcal03 -- All ok! 
tmp/b0pcal04.tmp: ### Crate: b0pcal04 -- All ok! 
tmp/b0pcal05.tmp: ### Crate: b0pcal05 -- All ok! 
tmp/b0pcal06.tmp: ### Crate: b0pcal06 -- All ok! 
tmp/b0pcal07.tmp: ### Crate: b0pcal07 -- All ok! 
tmp/b0pcal08.tmp: ### Crate: b0pcal08 -- All ok! 
tmp/b0pcal09.tmp: ### Crate: b0pcal09 -- All ok! 
tmp/b0pcal10.tmp: ### Crate: b0pcal10 -- All ok! 
tmp/b0pcal11.tmp: ### Crate: b0pcal11 -- All ok 
</pre> 
<b>Source monitoring</b> 
<pre> 
ped/tmp/sped_b0pcal00.tmp: ### Crate: b0pcal00 -- All ok! 
ped/tmp/sped_b0pcal01.tmp: ### Crate: b0pcal01 -- SMON ped problem   
ped/tmp/sped_b0pcal02.tmp: ### Crate: b0pcal02 -- SMON ped problem   
ped/tmp/sped_b0pcal03.tmp: ### Crate: b0pcal03 -- SMON ped problem   
ped/tmp/sped_b0pcal04.tmp: ### Crate: b0pcal04 -- SMON ped problem   
ped/tmp/sped_b0pcal05.tmp: ### Crate: b0pcal05 -- All ok! 
ped/tmp/sped_b0pcal06.tmp: ### Crate: b0pcal06 -- SMON ped problem   
ped/tmp/sped_b0pcal07.tmp: ### Crate: b0pcal07 -- SMON ped problem   
ped/tmp/sped_b0pcal08.tmp: ### Crate: b0pcal08 -- All ok! 
ped/tmp/sped_b0pcal09.tmp: ### Crate: b0pcal09 -- All ok! 
ped/tmp/sped_b0pcal10.tmp: ### Crate: b0pcal10 -- All ok! 
ped/tmp/sped_b0pcal11.tmp: ### Crate: b0pcal11 -- All ok! 
</pre>
<!-- Author: Z Huang, M Mattson -->


<!-- Date: Thu Jul 25 10:13:46 2002 -->
I forgot to make an entry when we did this during the<a href= 
'/cgi/elog/elog.pl?nb=2002&action=view&page=611&frame=2&anchor=08:49:50'> 
tuesday day shift</a>.<br> 
<br> 
This is a copy of the e-log entry: 
<pre> 
Ops manager Steve Hahn mentioned that the +5V analog 
for one of the plug crates was at 1.25 
 
Rick Tesarek confirmed that it was a pei fault with 
EPSE-1, pcal08. Just happened (8:30ish). Monitors 
and qie pedestals confirm this. 
 
East plug power cycled. Power monitors and qie 
pedestals look good again. DAQ ace told that SMX 
calibrations needed for crates that were power cycled. 
</pre>
<!-- Author: M Mattson -->


<!-- Date: Thu Jul 25 10:26:39 2002 -->
Problems with EPSE-1, the power supply for pcal08, is back.  Information starts with the <a href= 
'/cgi/elog/elog.pl?nb=2002&action=view&page=617&frame=2&anchor=09:05:51'> 
thursday day shift</a>.<br> 
<br> 
Around 9pm, +5V analog for the power supply read at 1.25V.  Since Steve Hahn is current ops manager, he was on hand to power cycle the east plug.  Twilight Zone music plays, solenoid trips.  (This is a known problem.)  The IFIX monitors looked okay after the power cycle.<br> 
<br> 
About 5 minutes later, same problem comes back.  Steve Hahn reminds me that I should check the pedestals (doh!!), to make sure it is a real problem, and not a monitoring program problem.  pcal08 shows zero pedestals, no rotation through the capacitors.  Steve decides to power cycle the east plug again.<br> 
<br> 
Immediately after the power cycle, I check the pedestals.  Good values, events evenly distributed over the capacitors.  Less than five minutes later, same problem shows up on IFIX.  Check pedestals, they are bad again.<br> 
<br> 
Decision made to make an access.  Manually power cycling the crate has, in the past, had better success than remotely power cycling the entire plug.  If this does not succeed, the power supply may be replaced.
<!-- Author: M Mattson -->
<!-- Comment: Thu Jul 25 11;51;13 comment by...M Mattson -->
<br>See the
<a href=
'/cgi/elog/elog.pl?nb=2002&action=view&page=617&frame=2&anchor=11:45:53'>
e-log</a>
to see Rick T's comments about what was done during the access.