Honeywell’s Solid State Electronics Centre (SSEC) in
In April l997 everything changed. For the first time, SSEC had a 100 excursion that was long-term. What made the matter more critical is that SSEC could correlate the TOC to contamination of the product. These two things were enough to convince everyone that SSEC had to find a solution that would ensure consistently low 100 levels.
Sequence of Events
The initial response to this problem was to systematically replace all of the consumables that might have been causing the problem. The SSEC brined and burned the two-bed ion-exchange units, regenerated the mixed-bed ion-exchange units, and replaced the activated carbon resin. Ultraviolet (UV) lamps and quartz sheaths in the UV 100 reduction units were also replaced.