Friday, September 22, 2017

9/22/17

TGM alarm maxed out first in pump enclosure then in both pump and reactor enclosures, with minimum readings at the scrubber outlet and system enclosure.

Found a crack pipe clamp on the vacuum line going to the pump.  Replaced this connecting pipe clamp.

Replaced the pump oil.

Wednesday, June 21, 2017

AsH3 cylinder was replaced. 
     Lot # 1987306991Q7  SV020731
     Net Weight: 1.98 lbs or 898.11 g

Old cylinder is being stored in back of MOCVD enclosure.

Wednesday, May 10, 2017

4-20-2017

Charcoal in scrubber was changed.  This was done to help prevent readings at the scrubber outlet when using PH3.

5-5-2017

A finer grade of charcoal was added to the charcoal in the scrubber.
5-10-2017

TGM pump stopped working during the night.  A fastener screw was sheared off and I was unable to adjust the flow at any of the points.  All points were reading low flow.  The pump was replaced with a new one, which is working fine. - NS