PerkinElmer Frontier FT-IR, Руководство пользователя

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An Overview of the Frontier IR Single-Range Spectrometers . 25
The instrument is connected to a PC, either point-to-point or over a network. The Spectrum
software package supplied enables you to control the instrument and to manipulate the
spectra that you collect.
Optical system
The optical system is under the main cover of the system. Usually the main cover of the
instrument is closed, but to perform most maintenance tasks the cover has to be open. When
you do this, a safety interlock automatically switches off the power. Nevertheless, the
instrument should be disconnected from the mains before opening the main cover for
maintenance.
Consistent, reliable performance is achieved by having few moving or adjustable parts, and
by extensive insulation of the optical system from the effects of humidity and vibration.
Stability of the optical system
The entire optical system is purged and sealed at the factory. A supply of desiccant placed
within the system removes any water vapor and carbon dioxide that may enter. A desiccant
indicator is fitted in the top cover, which warns you when the desiccant needs changing (an
internal humidity sensor is available as an option).
In Frontier FT-IR spectrometers, KBr or CsI windows separate the sample compartment from
the purged optical system. For Frontier FT-NIR spectrometers, these windows are CaF
2
.
NOTE: Before you select the MCT detector (optional) in Spectrum software, fit one of the
attenuators supplied (Attenuator Set – L1160560) to the window to the right of the
sample compartment to prevent the detector from overloading. See
Installing/
Replacing Windows
on page 78 for more information.
You can purge the sample compartment with clean, dry, oil-free air or nitrogen. Either one
removes water vapor; however, nitrogen is preferable because it also removes atmospheric
carbon dioxide.
WARNING
Do not use a flammable gas to purge Frontier IR Systems. The
instruments contain a hot source, and a fire or explosion will result. Only
use clean, dry, oil-free nitrogen or air to purge the instrument.
The optics are kinematically mounted to ensure accurate positioning and to make them
rugged. The interferometer is enclosed and mounted on anti-vibration mounts to guard
against air and bench borne disruptions. The interferometer uses very low-friction point
bearings and a frictionless electromagnetic drive to ensure long life.