(Regarding camera view of CP4's bake-out control PLC display) 

I noticed that TC1 has acquired an offset as of this morning.  This TC is the closest to the heat source and, until this morning, has consistently been the "hottest" of the four displayed TCs on the PLC display.  Now, it is consistently below TC2 which is the next TC downstream in the heated air flow.  I am sure that this is the result of its extension wire connector being disturbed during the installation of the second duct heater this morning.  This extension wire connector is located very near where the work was being done and would have been in the way.  As the TC is what the PLC is using to determine the heater output, it is important that it represent the actual temperature of the air exiting the heater.  If this TC's value differs too much from TC2 or becomes "bogus" we could have a problem of the PLC overheating or underheating.  I'll keep a close eye on it over the weekend.