>>> 'lpe2' problem from phillip -- Thu Mar 23 06:37:07 1989 <<<

P: TC (type E) broke during use as reported by hsin
S: 2 more were ordered. Should be here within one week.

>>> 'lpe2' problem from bob -- Mon Mar 27 07:50:24 1989 <<<

User reports temperature profile is poor.
bob

>>> 'lpe2' problem from hsin -- Fri Mar 31 14:21:02 1989 <<<

The shunt post melt after I turned on the power. The nichrome wire
is red glowing!  Temperature is too high for it, I guess. Phil and
I don't know what to do next. I think we must call the company service
as soon  as possible.  Now I just remove all the shunt nichrome wire
away and return the furnace to its original condition. I hope it can
be serviced early next week so that I can use it by next Friday. 


Wei Hsin
From phillip Fri Mar 31 14:58:53 1989
Received: by argon (5.57/1.16)
	id AA10401; Fri, 31 Mar 89 14:58:47 PST
Date: Fri, 31 Mar 89 14:58:47 PST
From: phillip (Phill Guillory)
Message-Id: <8903312258.AA10401@argon>
To: lab_equip_probs, phillip, robin
Subject: spindryer1 problem
Status: RO

This expt. is up for the weekend.

From hsin Fri Mar 31 16:56:53 1989
Received: by argon (5.57/1.16)
	id AA12338; Fri, 31 Mar 89 16:56:49 PST
Date: Fri, 31 Mar 89 16:56:49 PST
From: hsin (Wei Hsin)
Message-Id: <8904010056.AA12338@argon>
To: phillip
Subject: Re:  lpe2 repairs
Cc: bob, voros
Status: RO

Yes, please send LPE2 to Marshall Furnace Co. as soon as possible for
change a new shunt panel and profiling the furnace. Money in my account
is not a problem. This LPE is the first priority for my project. I will
talk to Prof. Wang to pay for the repaired parts. Thanks for your quick
respond and action on this matter.

Wei Hsin


>>> 'lpe2' problem from phillip -- Wed Apr 12 14:43:00 1989 <<<

The Marshall furnace has been returned from the factory. It
is back in its normal place. It will be connected tomorrow
a.m. It is not working again, yet.

>>> 'lpe2' problem from phillip -- Fri Apr 14 10:47:50 1989 <<<

The Marshall furnace has been reinstalled. It has been ramped
up to 800dC over a 16 hour interval. This was done yesterday.
The profile of the load zone will be thermally checked for
uniformity today by Wei .

>>> 'lpe2' problem from hsin -- Sat Jun 17 15:12:58 1989 <<<

I cleaned the LPE2 tube on Friday by 3HCl:1HNO3.  Afterwards, I
bake it at 990C.  Saturday I came in and roll off the furnace and
observe the tube start to break!!  I believe there are some acid
still remain outside the tube and didn't rinse completely! Otherwise
this should not happen.

The tube needs to be repaired by factory or order a new tube with
same size.  I believe I made a desaster for myself! I should be more
careful when I clean the tube.  But it is too late.

I need the LPE urgently. Could I ask Katalin and Bob help me as
soon as possible?  I am willing to drive down to any glass shop
who can fix it or made a new one as soon as possible.

Please take a look at the LPE tube first thing on Monday. Thanks.
I will come in early to meet Bob and discuss how to make the LPE 
work as soon as possible.

Wei Hsin

>>> 'lpe2' problem from hsin -- Mon Jun 26 11:14:32 1989 <<<

The hydrogen purifier's temperature drops down to room temperature
after Phil and I represure the purifier with H2 and rescrew the 
purifier on the table.   Something goes wrong during this operation.
May be the T.C. disconnected during the mounting??  Could Phil check
it soon today?  Thanks.

Wei Hsin

>>> 'lpe2' problem from phillip -- Mon Jun 26 14:41:23 1989 <<<

P: Matheson #8651 purifier not attaining temp. setpoint.
S: Tightened all connections internal to purifier. Reseated
   open tc type K leads. Pressurized system with n2 to retard
   contamination. The purifier is on-line (even though the tube
   is missing).

>>> 'lpe2' problem from hsin -- Tue Jun 27 10:56:19 1989 <<<

I checked the furnace and find something strange.  The opening
end of the furnace seems does not work.  The heating element may
goes wrong.  At the middle and rear end of the furnace it is red
hot but at the entrance it is dark and cold!!  Will Phil take a 
look at it as soon as possible.  If the furnace did goes wrong,
we might have to send it back to Marshal Company again. 

Wei Hsin

>>> 'lpe2' problem from phillip -- Wed Jun 28 14:26:51 1989 <<<

The lpe2 Marshall furnace is disconnected and ready for transport 
to Scotts Valley. The truck has been reserved for tomorrow. Mario
has no outstanding warrants and will drive the heating device to the
company. Ther company will estimate us the repair cost and Wei/Whinnery
can decide. Mario will stop in HAyward on the way back and pick up the
repaired lpe2 quartz tube.

If there are any discrepencies in this scenario, pls apprise.
Otherwise, this is a GO for tomorrow.

>>> 'lpe2' problem from phillip -- Wed Jul  5 14:43:12 1989 <<<

The manual for the lpe2 temp controller has arrived. Anyone wishing 
a copy may make one. The book is in the manuals file in the office.

>>> 'lpe2' problem from hsin -- Mon Aug 14 12:44:19 1989 <<<

Again the controller power is off this noon. I think the only way to
prevent this happen again is to limit any heavy load from PANEL F.
Once the controller is off, the furnace will cool down very fast!
If this happen during the LPE growth, it will be a desaster for me!
Could Phil check again to see if there is any heavy load on any of
the circuit breaker on PANEL F.  If there is any of it, please remove
it to other panel.  Thanks.

Wei Hsin

>>> 'lpe2' problem from phillip -- Tue Aug 15 06:40:28 1989 <<<




P: Furnace controller failing sporatically.


Wei, may we check the battery backup for the electronics?
I do not think the solution lies in rerouting power for
other machines.
Please apprise.

>>> 'lpe2' problem from bob -- Tue Aug 15 12:07:55 1989 <<<

lpe2 temp controller is failing. It appears that it may be more 
susceptible to noise than previously. hsin has been supplied a
noise isolation transformer in an attempt to improve reliability.

>>> 'lpe2' problem from phillip -- Wed Aug 16 08:41:08 1989 <<<

H2 Status

#1= 2.1 Kpsi  #2= 2.1 Kpsi  #3= 1.8 Kpsi
4 full H2 reserve cylinders being delivered today.

>>> 'lpe2' problem from hsin -- Tue Sep  5 13:01:23 1989 <<<

This noon at around 12:40, someone in the lab. or this building
used a lot of power . The whole LPE room turned dark for a few
second. The temperature controller turned off at this time. Therefore
it was the power line noise which turned the controller off.

 I wonder what other line can affect Penal F?  If some one draw a
lot of current by using some equipment, it will always turn my controller
off!   This situation happened during the past weekend  and ruined
my wafer during the LPE regrowth.  Could Katalin or Bob check for me
to see what happened this noon at around 12:40 ???  Thanks a lot.


Wei Hsin

>>> 'lpe2' problem from hsin -- Wed Sep  6 12:13:11 1989 <<<

After the controller being taken off and a new capacitor added,
it do NOT function anymore!!!  Phil try to figure out what happened.
He took off the new capacitor again but still does not work!!


Trouble! Trouble! We need to call the factory. The worsest case is
to send it back to factory to repair. Hope this would not happen.

Wei Hsin

>>> 'lpe2' problem from hsin -- Wed Sep  6 12:28:40 1989 <<<

I fixed the problem. The lpe controller can operate now.
I will explain to Phil what happened when they take out
the controller.

Wei Hsin

>>> 'lpe2' problem from phillip -- Wed Sep  6 14:24:36 1989 <<<

  Per factory: Installed .1uf cap to decouple and isolate 5v
               ground in power supply.

  The other factory suggestion to replace the (possibly)
  degradated cap C5 (4500uf @ 25v). If the initial cap fails
  to provide relief, #2 will be tried.

>>> 'lpe2' problem from bob -- Thu Sep  7 13:28:27 1989 <<<

RE: Electrical Line Noise

Roy, of the electrical shop, PFM called. They are 
waiting to get a line monitor meter back from a factory 
calibration before they can check on the power to the
controller of lpe2. There is a similar job request from LSB
which is in the que before ours.  After that job they will 
be able to test our power line for fluctuations and noise. 
I will have Eleta turn in a work order with such a request. 
It may take 2 weeks or more befroe PFM can do this work. 
My contact there is Roy@2-2622.

This problem report will be cc'd to Eleta@janus for a
request to monitor an AC line in the Microlab and also
deleted from the e-stat board. I will have calendar mail
sent to myself to check on the progress of this order 
in 2 weeks.
s

>>> 'lpe2' problem from hsin -- Sat Sep  9 17:19:21 1989 <<<

When I clean the tube at weekend, because of slippy, tube hit the
sink in lberg furnace room.  The thin H2 flow tube inside the LPE
tube break at the joints at both ends.  Therefore it needs niner
quartz work to rejoin the two end joints back onto the LPE tube.

I think Bob can repair it within 20 min.  The two tubes are all O.K.
, just the joints at two ends break.  I leave everything before the
lberg furnaces.  I will come to see Bob first thing in Monday morning.

Wei Hsin

>>> 'lpe2' problem from bob -- Mon Sep 11 07:45:51 1989 <<<


RE: The failing of the programmable temp controller, lpe2.

Dan Carl called this AM to say that he would be turning on the
400 hp motor generator in the basement in 5 minutes. Phillip went in 
and programmed the contoller and lpe2 and we waited for Dan's
turn on. The controller failed at exactly our coordinated startup time.
The lights also dipped in the lab. These are on a different breaker
confirming the load effects a whole power riser, likely before
the step down transformer on the 5th floor. It is likely that
the Microlab is not the only unit effected in Cory Hall by
the startup of this unit. A solution will be investigated.

>>> 'lpe2' problem from gamelin -- Tue Sep 12 14:11:06 1989 <<<

LPE2 controller may have a faulty storage capacitor on one of
the main power controller boards which causes temporary loss
of power during line transients.  Phil is ordering a replacement
capacitor from the factory for us and will try to install it
next week (or the next convenient time between growths).

John Gamelin

>>> 'lpe2' problem from phillip -- Wed Sep 13 08:38:11 1989 <<<

The capacitors that are suspect in the 'data-trac' controller
have been ordered from the factory. Their ETA is one week from
today. A new digit display to replace a faulty unit was ordered
also. The cost of all the parts was approx.  $50.00.

>>> 'lpe2' problem from phillip -- Thu Sep 28 09:13:08 1989 <<<

P: Controller dumps on a.c. spikes.
S: Per factory; replaced marginal capacitor (C4 on print).
   Replaced faulty l.e.d. digit indicator. 

   Reset system to 890 dF.


  (Wei Hsin, please check the temp. setting asap to
   insure it is set correctly.)

>>> 'lpe2' problem from phillip -- Mon Oct  2 07:59:29 1989 <<<

H2 gas status:
#1= 2.1 Kpsi  #2=2.1 Kpsi  #3=1.9 Kpsi
1 bottle in reserve

>>> 'lpe2' problem from bob -- Fri Nov  3 14:02:58 1989 <<<

The H2 to lpe2 has been turned off and the hydrogen purifier has
been purged with N2. lpe2 is down.

>>> 'lpe2' problem from bob -- Mon Nov  6 15:52:40 1989 <<<

The H2 purifier on lpe2 has been turned on. It should be ready
for use in 1 hr.

>>> 'lpe2' problem from bob -- Mon Nov 27 15:28:52 1989 <<<

The H2 cylinders have been changed on the lpe furnaces.
There is currently 2200psi in the main regulator tanks and 2100 in the
reserve tank.

>>> 'lpe2' problem from bob -- Mon Nov 27 15:37:39 1989 <<<

rosal reported lpe2 had a green deposit on the surface of the quartz.
We have seen this occur over the years and it has not been a problem.
While changing the H2 bottles, I looked over this tube and found the
quantity of green material to be extremely large, much larger than
seen in the past. This leads me to believe some very major event has
occurred such as a fracture in the heat-pipe.

lpe2 should be profiled to check its temperature uniformity. Without
a working heatpipe, uniformity could become quit bad. It is possible
the heatpipe will have to be replaced to have a working system.

This message will be cc'd to Rosa Leon, lpe2's only current user.
She will have to run a quick check of temperature uniformity for 
a determination to be made.

>>> 'lpe2' problem from bob -- Wed Nov 29 07:01:57 1989 <<<

lpe2 is deamed operational in spite of the loss of it's heat pipe.
Processes performed by rosal do not require long, flat profiles.
