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DOC1049R (22 February 2024 12:07)
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This document should be read in conjunction with DOC1048R IRmadilloNA User Manual
–
Safety.
1.1. Purging the IRmadilloNA
The IRmadilloNA spectrometer is designed to be continuously purged. This eliminates any
interference in operation caused by changing levels of water vapour and carbon dioxide (CO
2
)
within the instrument, both of which interact strongly with infrared (IR) light.
The IRmadilloNA is fitted with purge inlets on the probe and spectrometer body. The Inlets are
shipped with blanking plugs that need to be removed before use. There are breathers on both
the probe and spectrometer body.
Figure 1: Purge inlet and outlet locations on ASM0627-09
The ideal purge gas is dry nitrogen. Alternatively, dry air from a purge gas generator can be
used. The output from this purge gas generator should have a minimum quality according to
ISO8573-1:2010 of Class 1:2:1 (dust:water:oil) or better. Keit can recommend suitable
generators that achieve this outlet air quality; contact [email protected]. Purge gas
generators may include an internal compressor or use factory-supplied compressed air with a
minimum quality of Class 4:4:4 (dust:water:oil).
NOTE
REMARQUE
All FTIR spectrometers are very sensitive to water vapour and
carbon dioxide. Even in well-controlled environments, e.g.,
laboratories, environmental changes can be large enough to
cause significant changes in the spectrum. We STRONGLY
recommend purging the instrument at all times.
Tous les spectromètres FTIR sont très sensibles à la vapeur d’eau
et au dioxyde de carbone. Même dans des environnements contrôlés
(des
laboratoires,
par
exemple),
les
changements
dans
l’environnement peuvent être suffisants pour causer des variations
de spectre significatives. Il est VIVEMENT recommandé de toujours
purger l’instrument.
