Page 12
DOC1048R (21 December 2023 17:31)
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The IRmadilloNA needs to be suitably supported. The weight of the instrument is ~18
kg, and it must be supported using the mounting points at the base, either through a
custom stand or using a Keit Cradle. The probe should not be used to support the
instrument.
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The body of the IRmadilloNA should not be placed in direct sunlight or near a heat
source. The instrument has internal temperature control, but this rating is limited and
model dependant. Direct heat sources can force the instrument beyond its operating
range and cause damage.
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The IRmadilloNA must be axially restrained when in the flow. Pressure on the probe
will cause the system to move if not properly restrained along the probe’s axis.
Figure 6: Probe immersion depth in pipework
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The central axis of the probe must be in line with the centre of the pipework.
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The probe must be aligned correctly with the port in which it is placed. It should not be
forced or bent into place as this will cause damage to the instrument.
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The nominal position of the probe end from the internal pipe wall is 10 ± 5 mm.
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The IRmadilloNA must be exposed to the flow when in operation. The probe tip must
be positioned in the flow within the pipeline or vessel to perform correctly; turbulent
flow is desired. If the tip is held in stagnant chemistry, building representative
chemometric models will not be possible.
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It is preferable to mount the IRmadilloNA with the probe positioned horizontally.
Mounting the IRmadilloNA with the probe pointing downwards risks the formation of
bubbles on the ATR element, and prevents the ATR from coming into full contact with
the analyte to correctly analyse the process liquid.
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Similarly, avoid mounting the IRmadilloNA with the probe pointing upwards. If there
are any suspended solids in the mixture, there is a risk of these solids settling on the
probe tip, which may result in the spectra not being representative of the process liquid.
