Wilks Enterprise Inc InfraRan Instruction Manual
4
2.3 Cleaning the Instrument
Use damp soapy rag. NO SOLVENT!
Do not attempt to clean the gas cell. If the cell has become fouled it will need to be
returned to Wilks Enterprise for replacement.
3.0 Theory Of Operation
The InfraRan Specific Vapor Analyzer is an infrared based analyzer. The diagrams
below, Figures 1 & 2, illustrate the theory of operation. A broad-band, pulsed
infrared source produces IR energy in the wavelength range from 2 to 5 microns.
This source is placed so as to illuminate the entrance window of a tubular, single
pass transmission cell or a folded path, multipass cell. A portion of the energy is
absorbed by the sample.
The infrared beam passes through an exit window, then through an optical filter
that selects the wavelength required for the analysis. The energy of the selected
wavelength illuminates a detector that converts it to an electrical signal proportional
to the intensity.
This signal is processed by a microcomputer that converts it to a real-time display,
of the gas concentration in parts per million (ppm). In addition to the display both
the original detector signal(s) and the calculated concentrations are transmitted as
an ASCII string through an RS-232 serial or USB port.
Figure 1 InfraRan Optical System with 16cm cell
To Next Page
Loading...
