GE MOA 280i, Руководство по эксплуатации и обслуживанию

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GE Analytical Instruments ©2006
15-7
DLM 14291 Rev. A
Figure 15-3: Reaction Cell as viewed
from PMT side.
•
Place the black, PMT cap over the
end of the PMT, being careful not to
touch the face of the PMT. Once the
cap is in place, the room lights can
be turned back on.
•
Use a paper towel to remove any
moisture from the outside of the
PMT and from the inside of the
cooler.
•
Place the PMT in a drawer or other
dark location while cleaning the
reaction cell.
•
Use the Allen wrench to loosen the three Allen screws holding the reaction
chamber to the cooler. Remove the screws from the reaction cell. The cell is
still attached to the back panel of the NOA by the three phillips-head screws.
•
The cooler is mounted in a slotted bracket with four screws and washers to
hold the cooler in place. Carefully slide the cooler toward the front of the
NOA. The optical filter is not attached at this point and may fall out of the
cooler if the cooler is moved too rapidly. The cooler should slide far enough
forward to give access to the filter and the reaction cell.
•
With the filter still in the cooler, use an alcohol wipe or wet a clean cloth with
methanol or ethanol and wipe the deposits from the surface of the red filter. If
the filter is removed from the cooler, be sure to remove any fingerprints from
the filter when reinstalling the filter in its holder.
•
Use an alcohol wipe or wet a clean cloth with methanol and remove any
deposits in the reaction cell, being careful to not bend the tubing in the cell or
break the plastic pressure transducer. Typically, deposits will form on the wall
opposite of where the NO and O
2
tubes enter the reaction cell.
•
If NaOH has gotten into the reaction cell, it may be necessary the rinse the NO
inlet tubing and bulkhead fitting with deionized water. Use a 7/16” wrench to