Grant-bio DEN-1B, Руководство по эксплуатации

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2. General Information
Densitometer DEN-1B is designed for measurement of cell suspension's turbidity
in the range 0.0 - 6.0 McFarland units (0 cells/ml - 180x107 cells/ml). DEN-1B provides
the opportunity to measure solution turbidity in a wider range (6.0 - 15.0 McFarland
units) however, it is necessary to remember that in this case the standard deviation
values increase.
Densitometer DEN-1B is used for :
D etermining concentration of cells (bacterial, yeast cells) in the fermentation process ;
D etection of susceptibility of microorganisms against antibiotics ;
I dentification of microorganisms with various test-systems ;
M easuring optical density at fixed wavelength ;
Q uantitative evaluation of concentration of dyed solutions that absorb green light.
The operation principle is based on measurement of optical density with digital
presentation of the results in McFarland units.
The unit is calibrated at the factory and keeps calibration without power supply.
However, if necessary it is possible to calibrate the unit by 2 - 8 points in 0.0 - 6.0
McFarland unit range. Both commercial standards (e.g. produced by BioMerieux,
Lachema, etc.) and the cell suspensions prepared in the laboratory can be used for
calibration.
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DEN-1B
Operating instructions
Version 1.01 - June 20 12