5.7
To remove the cell assembly from the 2500 proceed as follows:
Flush the cell thoroughly with Nitrogen and disconnect the process connections. Where
fitted, remove cell heater connection plug from the socket at the source end and allow
sufficient time for it to cool (this may take some hours). Remove any purge connections
from the end bosses if fitted. Slacken 3 x M6 socket screws securing the cell bosses at
either end of the sample cell.
Carefully disconnect the cell thermocouple from the cell body. Support the cell
assembly and pull the bosses inward from the ends of the 2500 sufficient to enable the
cell to be removed and taken to a workshop for maintenance. If necessary, slacken the
screws holding the source end casting onto the mounting chassis to permit easy
removal.
If the scrubbers (if fitted) are not to be removed, leave the bosses on the analyser and
blank the open ends of the bosses using the 2 blanking plugs (02500460), supplied
with the Special Tools Kit S2500979, to preserve the existing scrubbers. Otherwise
take the entire cell and boss assembly to a workshop.
Working on a clean bench in a suitable environment, dismantle the cell. Pull the end
bosses off the cell body. Note that these items are one-piece stainless steel. If the
bosses are fitted with absorbent scrubbers, these should be removed and replaced
(A variety of types may be fitted – see spares list for appropriate part numbers).
WARNING
• Lethal voltages: mains AC power supplies are potentially lethal. The
maintainer must ensure that all mains power supplies are disconnected
from the supply before maintenance work is started.
• Purge the measuring cell and associated pipework with an inert gas
before work is started.
• It is the users responsibility to ensure that work is carried out in an
adequately ventilated space – taking due account of risks associated
with release of flammable or toxic samples. Attention is also drawn to
the risks associated with the release of asphyxiants.
CAUTION
Do not pull or strain heater connection leads at any stage.
WARNING
Special materials are used for the windows. Some of these are toxic
(i.e. germanium, barium fluoride, zinc selenide, etc.) these substances must
be handled in accordance with the relevant local standards.
To Next Page
Loading...
