Technical Description: Inlet
Rapid Multi-Stream Sampler
C-22
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
Thermo Fisher Scientific
To remove contamination from process fluids, some knowledge of
the contaminant is required, both from a safety point of view and for
choice of a suitable solvent or cleaning agent. Accessible areas can
be mechanically cleaned, providing sealing surfaces are not
damaged.
Final cleaning should always involve the use of a clean solvent (such
as isopropanol as above) to remove any cleaning residues, grease,
etc. Excess solvent should be blown from the inlet components using
an inert gas. If possible, components should be dried in an oven at
temperatures up to 80°C.
Clean, or replace if necessary, external pipe work and gas
conditioning equipment to avoid recontamination. In cases of severe
contamination, it is possible for lines not directly responsible as
sources of contamination to have become contaminated. This can
include calibration lines.
The cause of the contamination should be investigated and rectified.
In some cases it is either undesirable or impractical to bring a large
number of sample lines to the analyser due to possible leakage, for
example if gases are toxic or flammable. In the latter case, this might
change the classification of the analyser room from a safe area to a
hazardous area. To avoid this, a remote mounting option is available.
The RMS is mounted in its own enclosure which can be positioned
outside the analyser room. This keeps the bulk gas handling parts of
the RMS outside, while only the relatively small selected sample
flow is introduced into the analyser / analyser room. The remote
RMS enclosure contains the control electronics for the RMS and the
calibration panel assemblies so that calibration gas is also kept
remote.
The RMS enclosure links to the main instrument enclosure via a 32
mm flexible conduit that carries all the required services for the RMS
(including the appropriate gas line(s)). This conduit can be sealed
through the wall at installation if required. The standard conduit
length is 1.5 m, but a shorter length may have been specified when
ordering.
Refer to the appropriate installation drawing to assess the layout of
the conduit run.
In the case of a full hazardous area system, a second smaller conduit
is fitted in parallel with the main services conduit. This is
deliberately empty and provided to ensure purge integrity is
guaranteed.
If the RMS enclosure is being mounted on an external wall, a degree
of weather protection is required. This is particularly true if
Inlet Options
Remote Mounting
