Do you have a question about the DEN-1 and is the answer not in the manual?
Questions and answers
Kaushik
March 10, 2025
if we are taking reading of NSS without culture it give 0.25 mcfarland. Shall we adjust the suspension to 0.75 to get 0.5 mcfarland value
1 comments:
Mr. Anderson
March 10, 2025
Yes, the suspension should be adjusted to 0.75 McFarland. Since the reading without culture is 0.25 McFarland, to reach a 0.5 McFarland value, the suspension must be increased by 0.25 McFarland. Adding this to the initial 0.5 McFarland requirement results in a total of 0.75 McFarland.
The current edition of the operating instructions applies to the following models and versions of densitometers, suspension turbidity detectors: DEN-1 version V.2GW DEN-1B version V.2GW Edition 2.03 – March 2018 Densitometers, suspension turbidity detectors DEN-1 & DEN-1B Page 2 Operating instructions...
Remove batteries from the unit if it will not be used for several months to avoid battery leakage. Edition 2.03 – March 2018 Densitometers, suspension turbidity detectors DEN-1 & DEN-1B Operating instructions Page 3...
Page 4
BIOLOGICAL SAFETY It is the user’s responsibility to carry out appropriate decontamination if hazardous material is spilt on or penetrates into the equipment. Edition 2.03 – March 2018 Densitometers, suspension turbidity detectors DEN-1 & DEN-1B Page 4 Operating instructions...
15.0 McFarland units, however, it is necessary to remember that in this case the measurement error values increase. DEN-1 & DEN-1B densitometers are used as a sample preparation devices for 1) determining concentration of cells in the fermentation process, 2) detection of susceptibility of microorganisms...
The following indication may be shown on the display (fig. 3/2): 0.0 (DEN-1) or 0.00 (DEN-1B) - the unit is calibrated and ready for operation. LO BAT (DEN-1B) - low batteries, replace the batteries as described in 4.3 or connect the external power supply.
Perform calibration from lower to higher calibration value. Use at least 2 points for calibration. Different calibration points are available: For DEN-1, calibration points are 0.5, 1.0, 2.0, 3.0, 4.0 and 5.0. For DEN-1B, calibration points are 0.00, 0.50, 1.00, 2.00, 3.00, 4.00, 5.00 and 6.00.
Set of 0.0, 0.5, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 McF turbidity standards Tubes 78 glass sample tubes, 16x100x0.8 mm. Factory standard Accurate within ±10% For DEN-1, calibration is possible only up to 5.0 McF Edition 2.03 – March 2018 Densitometers, suspension turbidity detectors DEN-1 & DEN-1B Operating instructions...
Cleaning. Standard ethanol (75%) or other cleaning agents recommended for cleaning of laboratory equipment can be used for cleaning and decontamination of the unit. Edition 2.03 – March 2018 Densitometers, suspension turbidity detectors DEN-1 & DEN-1B Page 10 Operating instructions...
We declare that this product conforms to the requirements of the above Directives ____________________ ____________________ Signature Signature Svetlana Bankovska Aleksandr Shevchik Managing director Engineer of R&D ____________________ ____________________ Date Date Edition 2.03 – March 2018 Densitometers, suspension turbidity detectors DEN-1 & DEN-1B Operating instructions Page 11...
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Do you have a question about the DEN-1 and is the answer not in the manual?
Questions and answers
if we are taking reading of NSS without culture it give 0.25 mcfarland. Shall we adjust the suspension to 0.75 to get 0.5 mcfarland value
Yes, the suspension should be adjusted to 0.75 McFarland. Since the reading without culture is 0.25 McFarland, to reach a 0.5 McFarland value, the suspension must be increased by 0.25 McFarland. Adding this to the initial 0.5 McFarland requirement results in a total of 0.75 McFarland.
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