eisco PH1196B-6 Spectrum Tube Carbon Dioxide Instruction Manual

: June 1, 2024
: eisco

Table of Contents

GENERAL SPECIFICATIONS
OBSERVING THE SPECTRA
DESCRIPTION OF SPECTRA
CUSTOMER SUPPORT
References
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eisco PH1196B-6 Spectrum Tube Carbon Dioxide

eisco PH1196B-6 Spectrum Tube Carbon Dioxide

GENERAL SPECIFICATIONS

Spectrum Tubes contain one or more elements as gaseous atoms or molecules. Energy is supplied through an electric field applied between electrodes at the ends of the tubes. Ions and electrons formed by the field are accelerated; collisions convert the increased Kinetic energy to other types, one being electronic. Electrons in energetic or excited atoms occupy one of many well- defined states. An electron with high energy E will return to a lower energy 3 state E , simultaneously emitting a photon 2 of energy E – E = E = hc/ ; where h = 3 2 -30 6.63×10 J-s is Planck’s constant, c = 8 3×10 m/s is the speed of light and is the wavelength of light (in meters) in the emitted photon.
General Specifications

Each excited atom type emits characteristic wavelength determined by energy level differences E present in that species. One may observe a particular color with the eye; analysis with a spectrometer will reveal a series of sharp (monochromatic) emission lines.

OBSERVING THE SPECTRA

These Spectrum Tubes use research-grade gasses and vapors to provide bright- line spectral lines of the highest clarity. They are designed for optimum intensity and line resolution when examined in a student grade spectrometer equipped with a ca.200 line/mm (5000 line/inch) diffraction grating.
The pressure of the various gasses in spectrum tubes is a carefully controlled value that will produce the maximum quality of brightness and clarity of the spectral lines.
For some tubes it is not necessarily the same value of pressure that produces maximum continuous operating life of the spectral lines. Tubes should be energized with the Spectrum Tube Power Supply, Which is made expressly for this purpose. Tube life is extended if operation is cyclic for no more than 30 seconds “on”, 30 seconds “off” etc., increasing the usable life of the tubes.
Some tubes using neon, helium and other gases found in cold cathode display signs can run continuously with less deterioration of the quality of the spectral lines. The others, such as hydrogen, the halogens and water vapor, require more care in processing to increase the life. Pure nickel electrodes and the best research grade of gases are used, and meticulous care is taken in processing to increase service life.